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S1385894720306197 | Utilizing intratumoral iron mediated Fenton reaction to induce cancer cells destruction chemodynamic therapy is an emerging tumor specific therapeutic strategy . However the CDT efficacy is severely restrained by insufficient endogenous H | pH redox dual responsive targeted supramolecular catalytic nanoreactor was designed. Prodrug Fc CA combined ROS generator with Fenton catalyst for molecular level CDT. Nanoreactor activated oxidative stress amplification and cascaded Fenton reaction. Nanoreactor realized synergistic chemo chemodynamic therapy with good biosafety. |
S1385894720306215 | Exogenous insulin administration is still the most used treatment for diabetes however type 2 diabetes with the characteristics of insulin resistance accounts for the vast majority proportion of diabetic population which makes insulin function failure . Currently many efforts have been devoted to insulin delivery with nanomedicine means whereas the treatment of insulin resistance in T2D using nanotechnology strategy is rarely reported . In this study we transformed a plant derived natural insulin sensitizer into biocompatible nano transport system where the natural insulin sensitizer oleanolic acid was conjugated onto natural polymer polygalacturonic acid to form self assembled micelles as oral administrated nanomedcine for insulin resistance treatment in T2D . | An oral administrated nanomedicine for insulin resistance treatment was developed. All components are derived from plants possessing low cost and biodegradability. OA PGA OA can overcome gastrointestinal barriers and alleviate insulin resistance. Molecular mechanism was mediated by promoting IRS 1 PI3K AKT signaling pathway. |
S1385894720306227 | A large amount of petroleum coke is considered as waste with low gasification rate and urgently needs to be exploited in an environmentally friendly efficient and economic method . As potassium plays an important role in the gasification reactivity enhancement the effects of potassium on the carbon conversion gas product distribution and the sulfur conversion were investigated in the chemical looping gasification process via a batch fluidized bed . H | K reduced the rate disparity in volatile releasing and gasification of petcoke. K doubled H. yield but the anions had weak effect on gas distribution. The carbon conversion efficiency increased by up to 39.67 after adding K. CO. K inhibited the graphitization of petcoke so the gasification reactivity increased. Relatively K was beneficial to in suit S capture by the formation of inorganic S. |
S1385894720306252 | Solar to hydrogen holds a great sustainable energy solution in which photocatalysis plays an important role . In this study a composite photocatalyst with NiO quantum dots in graphitic carbon nitride was synthesized and evaluated in photocatalytic and thermophotocatalytic hydrogen evolution reaction under visible light . A sample of 9wt NiO QDs g CN achieved the highest PC HER rate of 130molg | NiO quantum dots g C. composite presents high photo and thermophoto H. generation. O bond between NiO quantum dots and g C. is the key for improved photocatalysis. NiO quantum dots reduce electrochemical impedance for higher thermophotocatalysis. |
S1385894720306264 | Mercury contamination poses a serious threat to the ecological system and human health . Yet removal of mercury at parts per billion level in surface water is difficult to achieve . This study developed a Mg | FeS is soldered onto Mg. Al LDH via concurrent surface complexation and surface adsorption. Sigmodial Langmuir isotherm model perfectly simulates sorption isotherm data with a. of 116.96mg g. Mercury is removed through chemical precipitation ion exchange and surface complexation. The composite effectively removes Hg at ppb level under typical DO pH and coexisting metals. The composite and the immobilized Hg demonstrates long term stabilities over six months. |
S1385894720306276 | Today bioplastics are recognised as sustainable alternatives and one of the solutions to the crisis of petro based plastics . The next generation polymer poly has gained great popularity since it is associated with significant reduction of energy use and GHG emissions as well as with superior barrier properties . This drop in polymer is a promising 100 bio based alternative to its petro based counterpart poly . PEF can be effectively synthesised by polymerisation between 2 5 furandicarboxylic acid and ethylene glycol which represent biomass derived building blocks . These bio building blocks are an important commodity and platform chemicals that can be used for a variety of applications including the synthesis of PEF . This review covers recent progress in the production of novel bio building blocks for the preparation of PEF . Among various synthesis methods we reviewed the catalytic conversion of biomass derived hydroxylmethylfurfural into FDCA and the biological route from biomass feedstock into EG . In addition we covered recent progress in the synthesis of HMF from biomass since a reliable supply of HMF is important for the synthesis of FDCA . Finally research goals and challenges for future development of bio building blocks production were proposed . | Current progress in the catalytic conversion of bio based HMF into FDCA are reviewed. Recent progress in the synthesis of HMF from biomass are discussed. Biological conversion route of biomass feedstock into EG are given. Future outlooks and challenges of the production of bio building blocks are provided. |
S1385894720306288 | A holocellulose framework with anisotropic microchannels which is synthesized via a facile topdown strategy is demonstrated to be an ideal anisotropic substrate to guide the directional assembly of CuS nanoparticles along the walls of microchannels . The oxygen containing groups on the surface of HCFW and its abundant low tortuosity of channels contribute to the high loading and homogeneous dispersion of CuS NPs as well as the fast outdiffusion of cytotoxic substances Cu hence endowing the composite with an outstanding antibacterial activity which achieves approximatively 100 of growth inhibition ratios for | Anisotropic HCFW with plentiful microchannels is prepared by a facile topdown way. HCFW can guide the directional assembly of CuS NPs along walls of microchannels. CuS. achieves ultrahigh inhibition ratios for. and. The release of DOX from CuS. is well regulated by solution pH. CuS. has a strong ciprofloxacin removal ability in the presence of PMS. |
S138589472030629X | Remediation of contaminated agricultural soils focused on fixing heavy metals in soils to reduce their bioavailability . However with the influence of pH redox potential and microorganism in the soils heavy metals were likely to be released from a fixed state . The study aims to investigate magnetic porous biochar spheres and their roles in | A biochar sphere was prepared through a one step gelation and pyrolysis strategy. The biochar sphere showed excellent flotation and magnetism performance. The biochar sphere significantly decreased Cd II and As V concentrations in soils. Fixed Cd II and As V in soils can be activated. The biochar sphere can be recycled after use. |
S1385894720306306 | Nanoscale zero valent iron is easy to agglomerate and be oxidized by surrounding media and even can t be prepared continuously which have seriously restricted its application in environmental restoration . Herein we report a facile technique for the continuous preparation of nZVI with excellent dispersion and stability on a large scale using impinging stream rotating packed bed as the reactor and chitosan as the stabilizer . The effects of high gravity factor liquid flow and the additive amount of chitosan on the removal capacity of the chitosan stabilized nZVI were investigated . It was discovered that the removal capacity toward Cr was firstly increased and then reduced with each operating parameter increasing . The reactivity of CS nZVI prepared via different reactors and IS RPB was studied through the removal of Cr . With enhancement mass transfer and rapid micromixing capacities of IS RPB reactor CS nZVI prepared in IS RPB had higher reaction rate constant 0.0836min | The chitosan stabilized nZVI were prepared through IS RPB reactor in a large scale. Production rate of the nanoparticles reached 1.21kgh. The nanoparticles exhibited better dispersibility and stability. They also showed higher reactivity for removal of Cr VI . |
S1385894720306318 | Coal fly ash rich in rare metals accounts for a large amount of solid waste released from coal fired power plants . However rare metals the components of coal fly ash with the highest economic value are not fully recycled due to the lack of an effective low cost approach . Therefore it is urgent to develop a new approach aiming at increasing the recycling efficient decreasing the cost and strengthening the high economic value of fly ash . Here we developed an integrated approach combines hydrothermal chemical treatment process and biological leaching process to improve recycle of rare metals from coal fly ash . The results showed that the one step bioleaching method could obtain more kinds of rare metals and dramatically improve bioleaching rate after hydrothermal alkali treatment using | An integrated approach for enhancing recycle of rare metals from fly ash. A stepwise optimized biological process was developed for recoverying rare metals. Hydrothermal alkaline treatment has higher efficiency for leaching rare metals. |
S138589472030632X | A separated gasification chemical looping combustion system has been operated auto thermally which has high combustion performances and is beneficial for the lifetime of oxygen carrier . In this work the performances of SG CLC were compared with in situ gasification CLC in a two stage reactor system . The iG CLC has more favorable solid conversion than that of SG CLC namely the conversion of iG CLC reached 97.81 after 10min while that of SG CLC was 88.31 at 1050C . When the oxygen ratio | The performances of iG CLC and SG CLC were compared. The SG CLC under auto thermal condition showed high combustion performances. The SG CLC is beneficial to lengthen the lifetime of oxygen carrier. |
S1385894720306331 | Over the last decade two dimensional graphene has brought new impetus in environmental photocatalysis mainly benefiting from their unique physicochemical and photoelectric structural properties . Numbers of researchers have spared no effort to utilize visible light induced GR based composites as catalyst platform to generate reactive species in photocatalytic oxidation technology . Herein a comprehensive overview is presented on recent achievements of the construction and water related applications of these photocatalysts for persistent organic pollutants removal . A brief introduction of synthesis strategies is introduced for GR and its derivatives . Roles of GR as supports flexible substrates and co catalysts in composites are specifically pointed out with experimental studies . Most importantly shortcomings appeared in visible light photocatalysis and relative solutions by using GR species are clearly investigated . Based on the current research status special attention has been paid to their promising applications on removing typical POPs such as phenols antibiotics pharmaceuticals and dyes . Also challenges and prospects are discussed for future developments in this field . This paper enriches the knowledge to deeply understand the catalytic performances and mechanisms of GR based photocatalysts and bring better perspectives for researchers in this field . | Photodegradation of POPs by GR based composites was comprehensively reviewed. Recent developments in the synthesis of GR based photocatalysts were summarized. Catalytic mechanisms and roles of GR species in composites were elucidated in depth. Challenges and future research needs in this field were insightfully suggested. |
S1385894720306355 | Conductive polymer composites with high conductivity possess high electromagnetic interference shielding effectiveness which is however associated with the complication of excessive reflectivity to cause secondary pollution . In this regard we designed a micro shielding unit named reflection absorption integrated shielding compartment which was composed of magnetic hybrids uniformly distributed inside and the CNT walls wrapped outside . Magnetic hybrids were synthesized by depositing Fe | Reflection absorption integrated shielding compartment was designed. Such a compartment is composed by conductive wall and lossy core. High EMI shielding effectiveness with improved absorption ability was obtained. Compartment structure and lossy hybrids showed a synergic effect on EMI shielding. |
S1385894720306367 | Oxygen anion intercalation type supercapacitors are promising charge storage devices . In this study by taking advantage of the capability of selective exsolution of elements from perovskite lattice a nanoparticles modified perovskite composite is developed as new perovskite based electrode for supercapacitor with further improved performance that allow the energy storage via two different mechanisms i.e . Faradaic surface redox pseudocapacitance and oxygen anion intercalation pseudocapacitance . The derived supercapacitor shows high power density and energy density and no surface activation process and stable performance . Specifically perovskite oxides with the nominal composition of Sr | Perovskite oxide is modified by nanoparticles via B site cations exsolution. Nano oxide modified perovskite electrode with dual pseudocapacitive behaviors. No activation process before reaching the maximum capacitance. Improve the surface redox and oxygen anion intercalation pseudocapacitance. |
S1385894720306379 | In this work remediation of a soil highly polluted with chlorinated organic compounds including chlorobenzenes hexachlorocyclohexane and heptachlorocyclohexane has been carried out using persulfate activated by alkali . The contamination was caused by wastes from lindane production . Soil samples were sieved in two fractions F and G and both were used to study the influence of the oxidant and activator concentrations C | Remediation of soil contaminated by COCs from lindane wastes was studied. Alkaline activated persulfate was successful in the abatement of COCs in soil. COCs in soil behave like DNAPL in the partitioning between soil and aqueous phase. Oxidation takes place in soil and aqueous phases and transport limitations occur. A kinetic model was developed for the chemical and physical rates in both phases. |
S1385894720306380 | Radioiodine is a challenging contaminant to remove from aqueous wastestreams resulting from spent nuclear fuel reprocessing . To create a selective economical adsorbent a Cu loaded bispicolylamine chelating resin was produced from commercially available reagents and its performance for removal of aqueous iodide and iodine was assessed . The resin possessed a large equilibrium uptake capacity of 30514mg.g | A novel use for a copper functionalised chelating resin is demonstrated. High capacity and selectivity for iodide in static and dynamic experiments is proven. Uptake proceeds via ligand exchange REDOX chemistry and charge transfer complex formation. A fraction of the bound iodide is extremely chemically and thermally stable. The adsorbent shows potential for the treatment of spent nuclear fuel reprocessing waste. |
S1385894720306392 | Nowadays marine bacteria are abundant in marine ecosystems and considered to be one of the main causes of biofouling . Microbial films formed on adsorbent surfaces play a vital role in marine biofouling and lead to a decrease in uranium extraction . Therefore developing efficient antibacterial and antibiofilm sorbents for uranium enrichment is an urgent demand . In this work a novel composite nanofibrous adsorbent comprising of amidoximated polyacrylonitrile and poly methyl ether | Electrostatic bindings improve structural stability and shrinkage of nanofibers. Excellent antibacterial and antibiofilm activities by introducing the guanidines. Synergistic interactions of amidoxime and guanidine with uranium ions in seawater. |
S1385894720306409 | This study was to co encapsulate a chemokine and a chondroinductive molecule within microspheres via microfluidics and to incorporate them into a hyaluronic acid injectable scaffold for articular cartilage defect repair . HA injectable scaffold as a cartilage friendly microenvironment was prepared by crosslinking HA with 1 4 butanediol diglycidyl ether . A microfluidic device was set up to prepare monodisperse PLGA microspheres to load SDF 1 and KGN . An in vivo model of full thickness articular cartilage defects in rabbits was applied to evaluate the reparative capacity of the current package . The SDF 1 and KGN were co encapsulated simultaneously within the core and shell area of the microsphere with high loading efficiency and sustained release profiles of more than 2months . The release profiles of them were highly matched and well fitted to a first order mathematical model . These microspheres when incorporated into HA injectable scaffold were demonstrated to heal the full thickness articular cartilage defects in rabbits . The regenerated tissue had the typical cartilage histological characters and integrated well with the surrounding tissue at 12w . This developed cell free system could serve as an efficient therapy for articular cartilage defects treatment serving as a supplementary way to cell based therapies . | Co encapsulation of a chemokine a chondroinductive molecule within individual microsphere. Synergistic release profiles of SDF 1 KGN for efficient cartilage regeneration. An injectable scaffold based cell free therapy for articular cartilage repair. |
S1385894720306422 | Solid waste containing heavy metals halogens and other hazardous substances can cause harm to humans and environment . It is a central issue that how to treat solid waste effectively and harmlessly . Hydrothermal technology is a prominent method to treat solid waste and has attracting worldwide attentions . In the hydrothermal reaction water acts as a reaction medium which is clean and environmentally friendly . The high temperature and high pressure environment prompt various reactions occurring quickly and efficiently . The closed environment of the hydrothermal reactor is conducive to avoid secondary pollution . In this paper the concept and principle of hydrothermal technology are introduced and the applications on the treatment of solid waste are summarized from three angles of reduction detoxification and recycling . At the end of the paper we look forward to the future development of the hydrothermal technology applied on the solid waste treatment . | Hydrothermal technology is an environmentally friendly method used in the solid waste treatment. This review completely covers the application from the respects of reduction detoxification and recycling. This review proposes the future development of hydrothermal technology especially used in hazardous wastes. |
S1385894720306446 | Stabilizing the lithium anode while inhibiting the shuttle effect to achieve stable circulation under high sulfur loading is an inevitable problem for the commercialization of lithium sulfur batteries . A low cost of raw materials and a simple synthesis are also important prerequisites for product commercialization . In this paper zinc sulfide nanoparticles embedded in nitrogen doped 3D carbon nanosheets are proposed as modified separator materials . During high temperature carbonization of the carbon materials a zinc sulphide phase transition occurs resulting in an anion vacancy S | Zinc sulfide can catalyze the transformation of polysulfide. The anion vacancy produced by the phase transition of zinc sulfide is helpful to capture polysulfide. Carbon nanosheet skeleton is beneficial to the reuse of active substances. ZnS NCNS can accommodate a cathode with high areal loading. |
S1385894720306458 | As a promising energy saving technique the eco friendly and low cost solid state white light emitting diodes based on quantum dots have been widely studied . Herein a WLED device prepared by coreshell structure nanocomposites based on Ag In S | Overcome the aggregation induced quenching effect of CDs in solid state. A novel white light emitting nanocomposite with a coreshell structure has been synthesized. A UV pumped WLED with a CRI up to 91 has been fabricated with the nanocomposite. Controllable blue yellow PL intensity ratios of the prepared nanocomposite. |
S1385894720306471 | In this work the analysis of the mass transfer phenomena in catalytic open cell foams is carried out through the combination of computational fluid dynamics simulations and experiments using the CO oxidation on Pt Al | Systematic analysis of the mass transfer limitation in wash coated open cell foams. CFD simulations on Kelvins cell by DNS. Mass transfer correlation for low Reynolds number. Practical criteria in terms of dimensionless numbers for rate limiting regimes. |
S1385894720306483 | Internal flow can be induced by the external flow around a droplet . In the present work the three dimensional flow pattern and dynamic characteristics of the internal vortex of adhered droplet were demonstrated firstly and then the substance transfer behavior within the droplet dominated by the internal circulation was revealed by adopting two systems namely fluorescence reaction and suspended particle capture and combining with an interface reaction model developed . It was found that the internal circulation could not only transfer the reactants from the inside onto the surface of the droplet quickly but also carry the particles captured on the droplet surface into the vortex core rapidly in a vortex manner which could improve the reaction rate and control the capture process . This work uniquely demonstrates fundamental insights into the internal flow pattern of adhered droplet and promotes an understanding of the multiphase droplet based mass transfer mechanism and particle capture process . | Analyzed the fluid dynamics of droplet internal circulation. Revealed the substance transfer behavior controlled by internal circulation. Developed numerical methods for droplet internal circulation and interface reaction. |
S1385894720306586 | In this work a new adsorbent i.e . lysozyme nanofibrils conjugated with long chain PEI which could be successfully modified with the aid of a polydopamine interface was prepared by a simple and green method . The resulting fibrous composites exhibited superior adsorption and selectivity for lead removal due to their primary amino groups even in the presence of coexisting Ca | The AFL PEI was obtained using a bioinspired ultrafine amyloid lysozyme nanofibrils as the carrier. The ultrahigh surface to volume ratios ca. 400 provide a rapid Pb removal in 2. None. min. The selectivity index is 80 times greater than the commercial 001x7 resin. The nanofibrils effectively treated 12 200kg water kg sorbent with regenerated property. |
S138589472030663X | Laser induced graphene from polymers has aroused considerable attentions for its low cost and high efficiency fabrication and prospect applications in flexible micro energy storage devices . However its electrochemical performance has been constrained by its purity and macropore dominated structures . Herein a one step facile approach is reported for synchronous induction and activation of 3D porous graphene from KOH coated polyimide film by direct laser writing in ambient air . To explore the activation mechanism the effects of two physical forms of KOH with various concentrations are investigated . Studies reveal that medium concentrations of KOH are able to improve the quality heteroatoms doping and wettability of porous graphene in comparison with lower KOH . Additionally high concentrations of KOH contribute to the formation of carbon atomic defects and mesoporous structures with increased content of nitrogen . Benefiting from the improvement of activation the laser induced and activated graphene based in plane micro supercapacitors present an areal capacitance of 32.00mF cm | Synchronous induction activation of porous graphene on flexible substrate in air. The activation mechanism of porous graphene via direct laser writing is demonstrated. The effects of KOH on morphology composition and wettability are studied. Medium concentration of KOH can improve the quality and wettability of graphene. IMSCs provide 10 times higher energy density than that without activation. |
S1385894720306665 | The improvement in the long term corrosion resistance of conducting polymer coatings was essential for protecting metal bipolar plate in proton exchange membrane fuel cell . In this study carbon powders were functionalized with polydopamine to create a more negative charge surface and their morphologies were examined by TEM test . Then polypyrrole coating was successfully electropolymerized on 304 stainless steel in the presence of carbon powders . Therefore the conducting property of PPy coating could be restored by incorporating carbon powders when the coating suffered aggressive attack . The structure morphology and thermal stability properties of the synthesized PPy PPy C and PPy C PDA coatings were investigated using SEM AFM FTIR and TG analysis . The anti corrosion performances were also investigated in a simulated PEMFC working environment 0.1M H | The PDA powder improves the conductivity adhesion and barrier of PPy coating. PPy C PDA coated 304SS exhibits a high corrosion resistance during 720h immersion. Lower contact resistance of PPy C PDA coated 304SS is achieved. Mechanisms of durable anti corrosion performance of PPy C PDA coating are studied. |
S1385894720306677 | Plasmonic photocatalytic degradation and photoelectrochemical water splitting is very promising in the process of ecological environment protection . However the efficiencies reported are still too low for practical application due to the high recombination of photogenerated electrons and holes which can be improved by optimizing the design and assembly of highly ordered pore structures . In our work a composite plasmonic metal semiconductor photocatalyst Au ZnO hybrid inverse opal nanomaterial was prepared by | Au ZnO hybrid inverse opal Au ZnO IO was prepared by an. grown method. Bisphenol A not only can be photocatalytic degraded but also efficient mineralized. New two step electron transfers on Au ZnO IO significantly improve the charge separation. A photocatalytic mechanism was proposed and confirmed by several techniques. |
S1385894720306689 | In this research a ZnO Mg nano photocatalyst was synthesized by solvent combustion using microwave waves and its efficiency and application in the removal of furfural were evaluated . The synthesized nano photocatalyst was characterized by XRD FESEM EDX MAP and band gap techniques which showed that crystalline nanocomposite particles were synthesized uniformly . Also the average particle size of the syntheses is 60nm and the photocatalyst energy band is 3.02 electron volts . The removal of furfural pollutants was maximized using UV irradiation at 0.1g L photocatalyst and pH 5 conditions . Under optimal conditions furfural degradation analysis by mass chromatography showed that the photocatalytic process is an effective method for removing the pollutant . Also modeling and kinetic studies showed that this process follows the Langmuir Hinshelwood model and the pseudo first order kinetics it also shows quadratic mathematical model . | ZnO Mg nano photocatalyst was synthesized by solvent combustion. Application of the photocatalyst for furfural degradation has been evaluated. The average particle size is 60nm and the energy band is 3.02 electron volts. Maximum Furfural elimination achieved at 0.1g L photocatalyst and pH 5. Langmuir Hinshelwood describes the process with the pseudo first order kinetics. |
S1385894720306690 | In order to intensify the gas liquid absorption processes in the field of energy and environment high gravity rotating packed bed has been successfully applied in the multiple air pollutants abatement and CO | Green process intensification for simultaneous removal of NO. SO. CO. was proposed. Enhancement on mass transfer of NO. SO. CO. absorption was evaluated. Effects of key operating parameters on mass transfer rate were determined. Favorable energy consumption can determine a better mass transfer performance. Enhancement factor of NO. SO. CO. removal was identified by graphical presentation. |
S1385894720306707 | The hydrodeoxygenation of raw bio oil is an attractive route for the production of fuels and chemicals from biomass . For the sake of advancing towards the implantation of HDO at larger scale an adaptable kinetic model is presented for this process . A CoMo bifunctional catalyst supported on an activated carbon has been used . The P functionalities of the activated carbon support provide the catalyst with enhanced acidic features . The HDO runs have been carried out in a continuous packed bed reactor at 425475C . Two subsequent reaction stages have been observed during the experimental runs a transient and a pseudo steady state . In the former stage the catalyst is partially deactivated whereas in the latter an apparent constant activity is reached . The model decodes the complex reaction network of HDO with seven lumps and eleven reaction steps . The proposed model accounts for the evolution with time of the reaction medium composition in the transient state considering the reactions involved in the gas phase and the ones of solid product deposition and catalyst deactivation . Important contributions of decarboxylation decarbonylation decomposition and repolymerization pathways towards CO CO | Two kinetic stages are observed in the HDO of raw bio oil on a bifunctional catalyst. Transient and pseudo steady states are modeled with a lump based kinetic model. A selective deactivation model predicts the evolution with time of HDO. Deposition of solid products is predicted at the beginning of the transient state. A simplification of the model reproduces the data in the pseudo steady state. |
S1385894720306719 | Ethyl mercaptans which commonly exist in natural gas have to be removed to a low level due to their toxic odorous and corrosive properties . Herein a novel Fe N modified active carbon catalyst was prepared for the ethyl mercaptans removal . The Fe | A novel Fe N modified active carbon for ethyl mercaptans removal was prepared. Fe. phase is the main active site for catalytic oxidation of the ethyl mercaptans. The strong Fe N interaction increases content and dispersion of the Fe. phase. Sulfur capacity of the novel catalyst is nearly four times that of the activated carbon. |
S1385894720306756 | The electrochemical properties of graphene based supercapacitor electrode materials are closely related to their architecture and chemical nature . Herein the siloxene reduced graphene oxide composite hydrogel with modified three dimensional hierarchical architecture and increased oxygen containing functional groups are developed via intercalating small amount of layered siloxene between the reduced graphene oxide sheets by a one step hydrothermal process . Siloxene serves as the spacers to form a three dimensional structure with graphene resulting in increased specific surface area . More importantly siloxene is used to modify the surface chemical nature of graphene sheets by introducing additional oxygen containing functional groups . The abundant oxygen containing functional groups on SGH contribute to the pseudocapacitance and improve the wettability . Consequently the proposed SGH exhibits a high specific capacitance of 520 F g | 3D oxygen rich graphene based hydrogel is developed for supercapacitors. Layered siloxene is used to tailor the architecture and chemical nature of graphene. Superior capacitance performance with excellent cycling stability is achieved. |
S1385894720306768 | It is attractive though it is very challenging to synthesize conductive elastomers with high transparency and self healing ability simultaneously with facile and environmentally friendly preparation process . Here we demonstrate the fabrication of highly transparent self healing conductive elastomers based on synergistic hydrogen bonding interactions between poly and phytic acid molecules . The hybrid network elastomers showed a fast self healing property without any other external stimuli and excellent self healing efficiency within 48h . The poly PA elastomers were highly transparent intrinsically conductive an ionic conductivity of 7.810 | Highly transparent self healing conductive elastomers were prepared. Synergistic H bonding interactions were employed for the self healing mechanism. Poly PDES PA elastomers were used to monitor the human activities. |
S138589472030677X | Significant progress has been made in endowing biomedical materials with antibacterial properties . However the commercialization of these systems still poses various practical challenges . In this study we report a facile technique for the preparation of practical and efficient antibacterial coatings based on well defined polysilsesquioxane structures containing quaternary ammonium cation and long alkyl chains . PSQ is a hybrid material containing organic groups within a flexible and robust siloxane network and can be endowed with different functions according to the synthetic conditions employed in the sol gel process . However depending on the synthetic precursors a non uniform PSQ structure can be formed which limits the functions and stability of the resulting material . Accordingly we synthesized PSQs with homogeneously distributed quaternary ammonium cation and long alkyl chains using optimized synthetic conditions . The PSQs were coated on devices | Polysilsesquioxanes with siloxane network and antibacterial chains are synthesized. The polysilsesquioxanes have a ladder like structure suitable for durable coating. The polysilsesquioxanes are easily coated on dental materials via self assembly. The coated dental materials show strong antibacterial effect for various bacteria. Coatings with nanoscale thickness improve the mechanical strength of the materials. |
S1385894720306781 | Biochar is widely used material whose physical and chemical characteristics been widely investigated . Nevertheless dissolved organic matter released from biochar has received relatively little attention . In particular little research has been conducted to understand the effects of feedstock biomass components on biochar DOM release . To control the amount of DOM released from biochar this study focuses on the role of lignin a component of biomass . To this end samples of sawdust containing different lignin contents and a binary mixture of cellulose and lignin were pyrolyzed at 400 and 700C and then the physico chemical properties of the resulting biochar and Fe and As mobility were investigated in arsenic contaminated soil amended by the biochar . This study showed that lignin is an critical factor in controlling the release of DOM . The amount of DOM released from the sawdust biochar with the lowest lignin content was 33 and 44 lower than those produced from lignin rich biochar . The amount of oxalic acid in DOM decreased with increased lignin content . In addition As mobility and the transformation of Fe were minimized when lignin rich biochar was applied to the As contaminated soil . More importantly these results suggest that controlling the lignin content of biomass can be universally applied to predict DOM concentrations of the biochars produced . | Lignin content is inversely proportional to DOM release from the biochar. Biochar pyrolyzed sawdust with more lignin extracted less Fe from soil. Sawdust biochar with less lignin can enhance the As leaching from soil. |
S1385894720306793 | Clustered regularly interspaced short palindromic repeat associated Cas9 nuclease system has become a powerful toolbox as a gene fixed point knock out method and hold the promising prospect for cancer therapy . However the biological safety of the viral vectors and the instability of exogenous plasmid in blood circulation limits its application . Herein we reported a lactobionic acid functionalized and stimuli responsive chitosan based nanocomplex to co deliver sgVEGFR2 Cas9 plasmid and paclitaxel for hepatoma carcinoma therapy . The genome editing efficiency of sgVEGFR2 Cas9 in the nanosystem achieved up to 38.6 of HepG2 cells | Nanocomplex for co delivery of CRISPR Cas9 and paclitaxel was constructed. The nanosystem triggered efficient gene editing with good safety. The gene therapy of VEGFR2 sensitized the treatment effect of paclitaxel. The nanosystem exhibited the synergistic modulation for IL 6 IL 8 NF B pathway. The nanosystem achieved significant synergistic gene chemo HCC treatment. |
S1385894720306811 | We present a new strategy for improving the electrochromic properties of single layered ion gels for electrochromic devices by incorporating octa hexyl viologen substituted polyhedral oligomeric silsesquioxane . Newly synthesized OHV POSS was included in ion gel compositions containing a poly copolymer and ionic liquid to produce a freestanding film . When applied in single layered ECDs due to high ionic conductivity and fast charge transfer the OHV POSS film exhibited outstanding electrochromic performances with low redox potentials at 1.1V high transmittance changes of 56.1 and a moderate coloration efficiency of 124.1cm | We synthesized octa hexyl viologen substituted polyhedral oligomeric silsesquioxane OHV POSS . Electrochromic devices were fabricated using OHV POSS incorporated ion gel compositions. The prepared device showed excellent electrochromic properties and switching stability. Flexible electrochromic devices were fabricated on silver nanowire PEDOT PSS composite electrodes. The fabricated device exhibited superb electrochromic performance with repeated bending cycles. |
S1385894720306823 | Recently the researches about graphene materials as efficient adsorbents have been promoted from two dimension to three dimension . Compared with 2D graphene materials 3D graphene based macrostructures not only preserve the original properties of constituent monomers but also possess new collective physiochemical properties making them more attractive as versatile adsorbents in sample preparation . In this review we will innovatively summarize the recently published various kinds of 3D graphene based adsorbents from the angles of material type . Furthermore we will discuss their applications for removing of various water pollutants . At last the challenges and future outlook of 3D graphene based adsorbents will also be discussed . | Synthesis methods of 3D graphene were introduced. Types of 3D graphene based adsorbents were summarized. 3D graphene based adsorbents for removal of water pollutants were discussed. Trends of 3D graphene based adsorbents in sample preparation were outlooked. |
S1385894720306835 | Carboxymethyl cellulose stabilized iron sulfide nanoparticles have been shown promising for reductive immobilization of U in water and soil . This work aimed to fill some critical knowledge gaps on the effects of the stabilizer and water chemistry reaction mechanisms and long term stability of stabilized uranium . The optimal CMC to FeS molar ratio was determined to be 0.0010 . CMC FeS performed effectively over pH 6.09.0 with the best removal being at pH 7.0 and 8.0 . The retarded first order model adequately interpreted the kinetic data representing a mechanistically sounder model for heterogeneous reactants of decaying reactivity . The presence of Ca | CMC stabilized FeS CMC FeS nanoparticles can rapidly remove U VI from water. CMC FeS worked effectively under normal groundwater conditions pH DOM co solutes. Reduction accounts for 90 of U VI removal and S. and S. are primary e donors. High concentrations 5mM of bicarbonate or DOM may inhibit the U VI removal. Immobilized U kept stable in anoxic condition while 26 remobilized under air in 180days. |
S1385894720306859 | Herein large conjugated core anthracene with an innate bipolar property was employed to construct multifunctional organic electronic materials . Delicate manipulating molecules via combining anthracene core and large periphery groups two asymmetric anthracene derivatives namely 4 10 4 9 | High efficiency asymmetric anthracene derivatives as multifunctional deep blue materials for non doped homogeneous OLEDs. Addressing the contradiction of efficiency color gamut and structure complexity of devices. The outstanding homogenous OLED with a narrow band deep blue emission and extremely low roll off of 4.8 at 5000cdm |
S1385894720306860 | Development of a facile tool for selective detection and separation of heavy metals present in aqueous media is a demanding challenge in the chemosensing field . In this study a natural product halloysite nanotube which shows excellent dispersibility in water was selected as the scaffold to demonstrate simultaneous detection and removal of Zn ions from aqueous solution . For this purpose HNTs were rationally integrated with coumarin moieties . The nanocomposite was prepared by treating amino functionalized HNTs with 7 hydroxy 4 methyl 2 oxo 2H chromene 8 carbaldehyde to give the C | Coumarin is anchored on the halloysite surface to form a Schiff base containing product. The addition of Zn II can trigger a turn on fluorescence in the nanosuspension. Zn II triggered aggregation can used to remove the Zn II containing complex. Chelating with Zn II shows high sensitivity and specificity. |
S1385894720306872 | Nanocomposite adsorptive membranes with nanosorbents incorporated have become a promising material for the treatment of heavy metal containing water but their practical applications have been limited by the aggregation of nanosorbents in the membrane matrix . In this study a homogenous in situ generated ferrihydrite nanoparticles polyethersulfone adsorptive membrane was prepared for the removal of lead from water for the first time . The XRD TEM and XPS results showed that ferrihydrite particles with the size smaller than 10nm were successfully introduced into the composite membrane . The SEM EDS result indicated a homogenous distribution of the in situ generated ferrihydrite NPs in PES membrane . With more generated NPs the membrane structure varied from a larger finger like macro void structure to a suppressed finger liker macro void structure due to the contributions of viscosity hindrance and thermodynamic enhancement to the demixing rate . Besides the surface hydrophilicity and water flux increased gradually . The membrane M9 was stable for treating lead contaminated water at pH above 3.0 with the optimal adsorption pH at 5.5 . Furthermore the M9 displayed the highest adsorption capacity of Pb | Homogenous ferrihydrite NPs PES composite membranes were firstly prepared by in situ generation. The membrane exhibited high adsorption good selectivity and superior reusability for Pb removal. The adsorption of Pb by M9 mainly occurred via the cation exchange between Pb. and H. HA enhanced Pb removal in filtration via adsorption and size exclusion mechanisms. The prepared membrane shows great potential for the removal of heavy metals from water. |
S1385894720306896 | The reaction mechanisms for liquid glycerol decomposition in the presence of cold plasma were studied experimentally and mathematically . Glycerol decomposition primarily proceeds via two routes dehydration to acetol and cracking to methanol cation radicals and glycolaldehyde . In a N | Glycerol deoxygenation is initiated by radicals in the presence of highly energetic electrons. Product distribution is turntable by changing carrier gas and plasma power. Rapid conversion of glycerol within seconds at atmospheric conditions. The process can be successfully modelled using a kinetic model under both carrier gases with a high degree of accuracy. |
S1385894720306902 | This work describes a new application of a composite of ZnO and polypyrrole in the partial photocatalytic oxidation of 5 hydroxymetilfurfural to 2 5 furandicarboxylic acid using air as an oxygen source under visible light illumination . The composite of ZnO PPy was synthesized by polymerization method and characterized by Raman spectroscopy cyclic voltammetry and Tafel curves . The electrochemical characterization of ZnO PPy shows this composite is active under visible light due to the presence of a higher value of exchange current density | Partial oxidation of HMF under visible light irradiation to biorefinery products. Basic Ph favors the cleavage of CH bonds in the CHO groups throughout oxidation of 5 HMF. Kinetic modeling and activation energies analysis were undertaken. Relationship between interchange of current density of ZnO PPy composite and its catalytic activity. |
S1385894720306914 | A microfluidic detection platform is presented for the rapid and low cost measurement of preservatives in foods . The microfluidic platform consists mainly of an integrated microfluidic reaction chip and a micro spectrometer detection system . The reaction chip further involves a heater and a micromixer zone for sample reagent mixing and reaction and is fabricated on a PMMA substrate using a CO | A microfluidic detection platform is presented for detection of preservatives in foods. The platform comprises a PMMA microfluidic chip and a micro UV detection system. Sorbic acid concentrations of 15 commercial food samples are measured. The measurement results deviate by no more than 7.5 versus official HPLC method. The concentrations of benzoic acid sulfur dioxide and formaldehyde are also measured. |
S1385894720306938 | Metal air batteries have drawn great attention in the past decade due to their high energy density and low cost . However several challenges remain in the development of such promising devices including slow kinetics of the cathodic reaction and undesirable deposition of metal oxide on air cathode . Herein as a proof of concept we show single atom scale metal vacancy engineering in heteroatom doped carbon cathode to enable high performance zinc air battery with reduced overpotential . Density functional theory calculations indicate that metal vacancy induced pyridinic N can tailor the electronic structure and thus facilitate the catalytic reaction . The single atom dispersed FeNC catalyst with optimized Fe vacancies shows improved reactivity and the facilitated chemisorption of oxygen intermediates in the actual battery operation is directly observed by | Single atom scale metal vacancy engineering facilitates the catalytic reaction. Vacancy induced pyridinic N enables non deposition of zinc oxide on air cathode. Rechargeable zinc air battery shows high reversibility and stability. All solid state battery demonstrates robust durability and excellent flexibility. |
S1385894720306963 | All solid state lithium sulfur batteries show increasing potential for practical applications in portable electronic devices and electric vehicles due to their high energy density low cost and environmental friendliness . However the large interface impedance of solid state lithium sulfur batteries leads to low capacity and short cycle life . In this study a hierarchical design of sandwiched NASICON type Li | High performance sandwich structured SPE LATP SPE electrolyte was prepared. SPAN anode was successfully applied to all solid state lithium sulfur batteries. The SPAN SPE LATP SPE Li batteries exhibited excellent electrochemical performance. Interface reaction between LATP and lithium anode was suppressed. |
S1385894720306999 | Inorganicorganic electrolytes with 3D cross linking star shaped structured networks consisting of multifunctional epoxy POSS and rich EO unites are proposed for lithium ion batteries . Here multifunctional epoxy POSS epoxy and amino monomers containing rich EO units are chosen to build tough and compact 3D network membranes as host polymer to guarantee fast ion transport through epoxy ring open polymerization with no initiator or no small molecule by products generating . The electrochemical properties of 3D GPEs and the performances of Li LiFePO | GPEs with 3D star shaped network were obtained by initiator free ring opening polymerization. The ionic conductivity of 3D GPEs containing POSS is up to 2.3510. S cm. at room temperature. The electrochemical windows of the 3D GPEs containing POSS are wide up to 5.25V. The Li 3D GPEs LiFePO. cells exhibit good cycling performance and high rate capability. |
S1385894720307014 | In this work a facile sol gel strategy was developed to synthesize N P co doped ordered mesoporous carbons . By accelerating the volatilization of ethanol a strong driving force promoted the self assembly process among carbon precursor surfactant and dopant at the interface of water and ethanol . The obtained NPMC showed stacked flake like surface morphology and ordered 2D hexagonal mesostructures with uniform pore size and high specific surface areas 938m | A novel sol gel strategy was developed to avoid the time consuming procedure. Synergic effects between N and P atoms provide more active sites and wettability. An ultrahigh capacitance and excellent cycle stability were obtained. The assembled symmetric supercapacitor shows extremely high energy density. |
S1385894720307026 | Development of affordable thermal energy storage has been hampered by the lack of environmentally benign and scalable phase change materials . Here we show size controlled colloidal synthesis of fatty acid lignin hybrid nanocapsules and demonstrate their applicability as PCM in dry and wet states . The one pot fabrication allowed for facile preparation of hybrid capsules with a predictable concentration of tall oil fatty acid oleic acid or lauric acid in core shell particles stabilized by softwood kraft lignin . Phase change peaks of capsules containing 40wt of lauric acid were observed in aqueous dispersion indicating a possibility to develop colloidal TES systems . In dry form the hybrid capsules prevented fragmentation of the phase change peaks during 290 heating cooling cycles while in wet state the capsules appeared stable for 25 cycles . The nanoscaled morphology of the capsules was characterized using thermoporometry differential scanning calorimetry transmission electron microscopy atomic force microscopy dynamic light scattering and small angle X ray scattering . Extraction of lauric acid from the capsules allowed for investigation of the intraparticle space previously occupied by the fatty acid . The fatty acid deficient nanocapsules were found to contain an internal volume that was 19 times as high as that of lignin nanoparticles . Approximately 20nm thick lignin shells of the capsules were found to be readily accessible to water permitting heat transfer across the capsules . The possibility to tailor the hybrid capsules by altering the chain length and saturation degree of the fatty acids opens applications that extend beyond the TES systems . | Engineering of hybrid nanocapsules hyb NCs from lignin and fatty acids. Size controlled colloidal synthesis by aqueous co precipitation. Characterization revealed core shell morphology at the nanoscale. Dry and wet hyb NCs were studied as thermally responsive phase change materials. |
S1385894720307038 | The degradation of six representative emerging pharmaceuticals crotamiton N N diethyl meta toluamide gemfibrozil ibuprofen and trimethoprim mixture in municipal secondary effluents by UVC activated HSO | UV HSO. and UV S. led to fast degradation of PhACs in secondary effluents. UV HSO. was less effective than UV H. in degrading PhACs. The efficacy of UV S. depends upon the rate constants of PhACs with SO. UV S. led to faster degradation of CBZ GEM IBP and TMP but not CRMT and DEET. The second order rate constants of HO. SO. with the target PhACs were determined. |
S138589472030704X | Pseudocapacitors can exhibit higher capacity compared to traditional electrostatic or electric double layer capacitors while they can provide faster power delivery and longer cycling ability than lithiumion batteries . In this study we demonstrate the hierarchical structures of NiCo hydroxides which are grown on Ni foam | We investigated the morphological evolution of NiCo hydroxides due to carbonate ions. The NCCH16 AC device shows the maximum energy densities of 31.1Whkg. The hierarchical NiCo hydroxides exhibit excellent electrochemical performance. |
S1385894720307063 | Injection of cell laden hydrogel microspheres is a minimally invasive method for tissue regeneration . However microspheres are usually limited by structural heterogeneity uneven size low cell loading capacity and poor cell survival rate . We devised a microfluidics synchronous cross linked technology to obtain injectable homogenous porous microspheres of desired particle and pore size by adjusting the flow rate and concentration of gelatin methacrylamide . The synchronous cross linking controlled the strength of cross linking and prevented fusion and uneven cross linking . The freeze dried microspheres of particle size 300m and pore size 50m rapidly adsorbed murine bone marrow derived stem cells and maintained their viability and osteogenic potential | Proposing a new microfluidic technology for the preparation of cell loaded porous microspheres. Ensuring stable yield and uniform size distribution of the generated microspheres. Realizing controllability of the cross linking strength. Achieving high capacity loading of the cells into the microspheres. |
S1385894720307099 | Multi level and multi angle designations of photocatalysts have attracted great attention to address the insufficient photogenerated charge generation and transformation in photocatalysis . In this study we reported an ultrathin 1D 2D W | Ultrathin 1D 2D W. g C. nanocomposites have been synthesized successfully. 1D 2D W. g C. present high remove rate for IBF under light irradiation. The LSPR effect of W. play vital role for the NIR light response ability. and. OH radical species are all participated in this reaction system. Distinctive multiscale structure caused the promoted photocatalytic activity. |
S1385894720307105 | Photocatalysis has received significant attention as a technology that can solve global energy and environmental issues that are essential for the sustainable development of society . The use of solar light and separated photo generated charges plays an important role in enhancing photocatalytic efficiency . Constructing heterostructure based full solar light driven photocatalysts is a sensible method for widening the solar light response and accelerating charge migration . This review comprehensively summarizes progress in heterostructure development for use in full solar light driven photocatalytic systems including basic photo response theory photocatalytic mechanisms and applications including environmental decontamination water splitting CO | Progress of full solar light driven photocatalytic heterostructures was reviewed. Photo responsive and photocatalytic mechanism of heterostructures were described. Heterostructure design need to consider both photoresponse and charge migration. These heterostructures were used in environmental energy and chemical field. Challenges and perspectives for photocatalytic heterostructures were discussed. |
S1385894720307117 | The development of visible light responsive photo reductant with organic conjugated polymers is considered as a promising and efficient way to solve the current environmental pollution and energy crisis . In this work we reports the Fe | The photochemical activity of polypyrrole could be effectively promoted by S I S heterostructure. The reaction pathway of polypyrrole was significantly changed by S I S heterostructure. The photogenerated electron was the key role in the photoreaction system of Fe. @SiO. @Polypyrrole. The removal ratio of Cr VI was 99.2 by using Fe. @SiO. @Polypyrrole under irradiation. The as prepared S I S heterostructure has potential reusability and recoverably. |
S1385894720307129 | The nano sized drug is an alternative strategy for enhancing the dissolution rate of pharmaceutical ingredients with poor solubility . Microfluidic technology has been widely applied for the preparation of nanoparticles because of its controllability . Combining the above two concerns this study proposed an anti solvent precipitation method to obtain itraconazole nanoparticles using a continuous flow droplet based microreactor . In addition to the experimental study of the generation of different shapes of droplets the influencing factors of nanoparticle preparation such as the flow rate ratio of the dispersed phase to the continuous phase the residence time the drug initial concentration and the stabilizer were further analyzed . The advantages of the droplets system were fully demonstrated in comparison with the conventional laminar flow system in the form of the T microfluidic device . The results showed that smaller nanoparticles of itraconazole with narrower size distribution were prepared in droplets and addressed that the particle agglomeration and growth would be restrained in droplets under the increased residence time higher initial concentration or amphiphilic stabilizers . | Investigated the preparation of drug nanoparticles without channel clogging using a continuous droplet based microreactor. Analyzed influencing factors in the anti solvent precipitation process and growth of nanoparticles. Prepared itraconazole nanoparticles with smaller and narrower size distributions in droplet based reactor in comparison with the T channel. |
S1385894720307130 | The design of dynamically operated fixed bed reactors is a challenging task especially for highly exothermic reactions . Fluctuations of process conditions such as inlet flow rate and composition can cause losses in product quality wrong way behavior or even a thermal runaway which damages reactor and catalyst . We present a methodology for the model based design of dynamically operated load flexible fixed bed reactors . Critical reactor dynamics are already considered during the reactor design and are integrated into the optimization problem . Instead of a steady state problem the reactor is optimized for a worst case dynamic scenario . The optimization approach yields a design which allows for safe transitions from any flow rate to another within a pre defined load range . The approach is introduced using the methanation of carbon dioxide as an important case study of high relevance for both research and society within the context of chemical energy storage of fluctuating renewable energy . A feasibility test demonstrates the safe reactor operation for a time horizon which includes a series of step changes of the inlet flow rate as an approximation of a fluctuating hydrogen supply . | Integration of critical dynamics into model based reactor design approach. Polytropic fixed bed reactor is optimized for a worst case dynamic scenario. Steady state and dynamic reactor models are coupled and solved simultaneously. Limitations of conventional steady state design approach are overcome. Methodology suitable for the design of flexible and dynamically operated reactors. |
S1385894720307142 | For the oxide based photocatalysts polyoxylic acid modification can affect their adsorption desorption properties and further regulate photocatalytic reaction pathway which is crucial for enhancing photocatalytic activity and selectivity . Herein phosphoric acid modified TiO | The most stable adsorption mode of phosphoric acid on anatase TiO. 101 surface is demonstrated. Phosphoric acid modified TiO. shows a remarkable photocatalytic activity. The main intermediates of gaseous o xylene degradation on PT0 and PT1 surface are identified. The influence of surface phosphoric acid on photodegradation intermediates of gaseous o xylene is proposed. |
S1385894720307154 | Lightweight polydimethylsiloxane foam materials with outstanding mechanical flexibility and high temperature stability as well as excellent flame resistance are attractive for various potential applications . However incorporation of conventional flame retardants needs high filling content and usually induces compromise of other important performance limiting their practical application significantly . In addition the problems of complicated procedure and environmental pollution of the traditional processing are imperative but challenging . Here we report a facile and green | GO sheets or nanoribbons were assembled onto the SiRF foam surface via a facile strategy. Two GO derivatives were well covered and bonded onto the foam skeleton at only 0.10wt . Ultra low GO derivatives improved mechanical property and flame resistance significantly. GONRs showed lower reinforcing flame retardant effects than the corresponding GO sheets. The synergistic flame retardant mechanisms and their difference were discussed and clarified. |
S1385894720307166 | Nonradical reactions induced by nanocarbon driven peroxydisulfate activation recently emerge a promising strategy of groundwater remediation or wastewater treatment whereas the involved reaction pathways remain controversial . We here investigate and differentiate the two representative nonradical mechanisms of PDS activation on graphene like nanosheets . The template induced GNS exhibited a high porosity of over 1200m | GNS showed the superior activity of persulfate activation by nonradical behavior. Kinetic rate of GNS was 217 folds higher than the popular activators. Singlet oxygen. only contributed 0.0046 to the overall degradation. Surface confined electron transfer on GNS was the dominated nonradical mechanism. Ka induced adsorption rather than partition controlled nonradical oxidation. |
S1385894720307178 | Electrochemical hydrogen evolution reaction is of great importance for high efficiency low cost production of hydrogen . As the HER activity of catalysts has been significantly improved in recent years the routings from catalysts to electrodes represent a key step for practical HER applications . In an HER electrode hydrogen reduction is accomplished by electron transfer proton diffusion and bubble release . These processes should be taken into account in the design engineering and fabrication of the electrode . In this review we begin with a discussion of the correlation between these important issues and the overall electrochemical HER performance and then summarize recent progress in the design and fabrication of HER electrodes with a focus on the effects of electrode structure electrolyte penetration ion diffusion and bubble adhesion release on the HER performance . We conclude with a perspective of strategies for further enhancement and the critical challenges for HER electrode fabrication . | HER performance depends on electron transfer proton diffusion and bubble release. A wide range of support materials. Critical substrate parameters include porosity electrical conductivity and chemical stability. Electrode fabrication by 3D printing. Superaerophobic surface. |
S1385894720307191 | Chemical hydrogels have been extensively applied to the removal of heavy metal pollutants . However most of chemical hydrogels inevitably contain toxic chemical crosslinker residues which impose serious threats on the environment . Herein a novel eco friendly physically crosslinked double network hydrogel of chitosan sodium alginate calcium ion CTS SA Ca | A novel eco friendly physically crosslinked double network hydrogel was prepared. Semi dissolution acidification solgel transition and internal gelation methods were combined. The mechanical property of the hydrogel was significantly improved. The hydrogel showed excellent adsorption capacities for Pb. Cu. and Cd. The adsorption mechanism kinetics isotherms and thermodynamics were studied. |
S1385894720307208 | The objectives of this study were to assess the formaldehyde adsorption capacity of doped porous carbon by experiments and theoretical calculations . Nitrogen sulfur or phosphorus containing porous carbons were prepared with different precursors by activation with KOH at 700C and compared with commercial activated carbon and used as the low HCHO concentration adsorbents in dry and wet conditions . Results showed that the HCHO adsorption capacity of AC N 2418.20m | Removal of indoor HCHO could be enhanced by doping optimized elements. The static dynamic adsorption trends of doped materials to HCHO were consistent. The adsorption energy of doped carbon materials to HCHO was P S N by DFT calculations. Surface functional groups played a secondary important role in the HCHO adsorption. |
S138589472030721X | The interfacial interactions between siderite humic acid and phosphate is critical to understand the transport of HA and phosphate in the environment . In this study the influence of HA on the adsorption of phosphate by siderite not only includes competitive adsorption but also includes indirectly facilitated adsorption . It was attributed to that humic acid as a representative natural organic matter possesses abundant carboxylic groups which facilitate chelation between minerals and HA and then the phosphate adsorption performance is affected . The experimental results concluded that three stages of the transformation from siderite to goethite under the action of HA can be divided . Firstly chelation can be formed between HA and the ferrous ions from siderite and it is favorable for the oxidation of Fe by the O | The influence of HA on P includes competitive and indirectly facilitated adsorption. HA could affect the surface complex species of phosphate. Humic acid could induce mineral transformation from siderite to goethite. Ferrihydrite as the mesocrystal exists in the process of mineral transformation. Goethite was formed by the structural rearrangement of ferrihydrite nano particles. |
S1385894720307257 | The metal oxide facilitated transformation of polyphenols and amino acids to humic substances is an essential process in soil and compost maturing processes . The objective of this research was to examine the specific roles of MnO | First comprehensive study of the individual roles of MnO. and O. in humification. was a major oxidant in the accumulation of humification product. The main role of MnO. was a catalyst during the humification process. The direct oxidation by MnO. was only limited to the transformation of FA. |
S1385894720307269 | Heterogeneous Fenton has become a promising economical and environmentally friendly method for water treatment however the production of abundant radical resources e.g . | Fe. modified schwertmannite accelerated. Fe. Fe. conversion. Fe. modified schwertmannite had good recyclability due to its magnetism. OH SO. and. can be produced by Fe. modified schwertmannite. Improving catalytic activity of schwertmannite could promote SO. generation. |
S1385894720307270 | Iron oxidizing supported autotrophic denitrification AD is a promising process for low carbon water treatment . Organic carbon has been a common pollutant associated with nitrogen pollution . However its interaction with Fe AD remains unclear . In this study influence characteristics and mechanism of OC on Fe AD were investigated . Fe AD was established based on iron scraps and iron carbon micro electrolysis . The results showed that the OC free ME ISs AD obtained denitrification load of 0.1910.028kgN m | Novel characteristics and mechanism of Fe 0 AD with organic carbon were revealed. Optimum dosage 1.0mgCOD mgTN enhanced Fe 0 AD and reduced N. O NO. accumulation. Bioconversion of iron compounds was enhanced and Fe 0 passivation of was reduced. Fe. based autotrophic denitrifiers and genes napA nirK nosZ were enriched. NaAC was more efficient in enhancing the Fe 0 AD process than glucose and EtOH. |
S1385894720307282 | In this study the impact of multi jet structure on the gas solid flow in a three dimensional integral multi jet spout fluidized bed was investigated using both numerical and experimental methods . Particle Image Velocimetry was applied to analyze the difference made by integral multi jet to the movement of particles in a 152 mm diametered spouted bed . The Eulerian Eulerian approach was adopted . Compared with the conventional spouted bed the addition of the side jet facilitates particles to generate a substantial amount of secondary eddies and the movement of particles can be effectively enhanced in the cross section of the multi jet spout fluidized bed . When the number of side jets approached N 18 the particle concentration in the annulus region was shown to to be extremely low . Considering the pressure drop of the spouted bed the comprehensive optimum number of side jet of spouted bed was set to N 24 . Besides there existed an optimum side jet diameter D 4mm at which the side jet exerted the optimal fluidizing effect on the gas solid two phase flow in the multi jet spout fluidized bed . The distribution structure of the side jets with lower density upper sparseness and symmetry contributed to the local fluidization of the inlet gas in the dead zone and Case D demonstrated the full fluidizing effect on the particles in the multi jet spout fluidized bed . | The effect of 3D integral multi jet structure on the gas solid flow in spouted bed is investigated. The effect of side jet geometry size on the gas solid flow is optimized. The effect of spatial distribution of side jets on the gas solid flow is optimized. |
S1385894720307294 | Solid particle distribution determines the reactor internal phases placement and the contact mode between catalyst particles and the liquid phase thus plays a key role in dictating the overall performance of slurry Taylor flow based microreactors . This study numerically investigates the distribution characteristics of particles within liquid slugs in a vertical capillary tube with the aim to describe the corresponding underlying mechanisms . | VOF DEM is developed for simulating the slurry Taylor flow STF . Numerical problem is solved for applying refined mesh for CFD DEM simulations. Body fixed frames of reference are introduced to aid the analysis of STF. Three distinctly different solid distribution patterns are observed. Relatively uniform solid distribution is achievable for. 550 and. 0.1. |
S1385894720307324 | A new mechanism is proposed to provide a viable physical explanation for the action of microwaves in solvent extraction processes . The key innovation is Temperature Induced Diffusion a recently demonstrated phenomenon that results from selective heating using microwaves . A mechanism is presented which incorporates microwave heating cellular expansion heat transfer and mass transfer all of which affect the pressure of cell structures within biomass . The cell pressure is modelled with time across a range of physical and process variables and compared with the expected outputs from the existing steam rupture theory . It is shown that steam rupture is only possible at the extreme fringes of realistic physical parameters but Temperature Induced Diffusion is able to explain cell rupture across a broad and realistic range of physical parameters and heating conditions . Temperature Induced Diffusion is the main principle that governs microwave assisted extraction and this paves the way to being able to select processing conditions and feedstocks based solely on their physical properties . | New mechanism to explain action of microwaves on biomass solvent systems. Model used to test steam rupturing and Temperature Induced Diffusion hypotheses. Steam rupturing only possible under extreme processing conditions. Temperature Induced Diffusion causes cell rupture with normal processing conditions. Will enable feedstock selection and process design for biomass valorisation. |
S1385894720307348 | The outstanding electromagnetic wave absorbers are highly needed in view of the extensive utilization of electromagnetic devices . Herein for the first time a series of hexagonal microflake like Fe | The sandwich like Fe. Fe. composites have been successfully synthesized. Not only the morphology but also the crystalline structure could be tuned. The effective bandwidth is up to 5.18GHz with a thin thickness of 1.71mm. |
S138589472030735X | By using grand canonical Monte Carlo simulations we investigated the adsorption of Xe Kr mixtures with the mole fractions of Xe ranging from 10 to 90 in single walled carbon nanotubes having diameters of 0.81 to 2.03nm at different temperatures . For the Xe Kr mixture the Xe Kr selectivity decreases with diameter of the CNT at 298K while demonstrating a complex dependency on pressure in CNTs . Due to the single file adsorbate configuration the smaller CNT achieves a higher adsorption capacity than the CNT . At 1bar and 298K the adsorption of Xe and the Xe Kr selectivity achieve their maxima 1.69mol kg and 36.3 in the CNT among the CNTs considered and this optimized selectivity is much superior compared to a large number of metal organic frameworks . We find that increasing temperature generally reduces the adsorptions of Xe and Kr with an exception that the co adsorption of Kr is enhanced in the small CNTs for obtaining additional adsorption volume released by the reduced adsorption of Xe . While increasing temperature reduces the Xe Kr selectivity in all the CNTs the selectivity decreases with the bulk concentration of Xe in the and CNTs and remains almost independent of Xe concentration in the larger CNTs at 1bar . As revealed by the performance coefficient the CNT holds the best performance on the adsorptive separation of Xe Kr in all the cases considered in this work . Our findings reveal that the CNT has a great potential on preventing the uncontrolled emission of Kr while facilitating the commercial usage of Xe . | Simulation of adsorption of Xe Kr mixtures in CNTs. Increased temperature enhances the co adsorption of Kr in small CNTs. Increased bulk concentration of Xe reduces the Xe selectivity in CNTs. A 6 6 CNT possesses a much higher Xe selectivity than many MOFs. A 6 6 CNT offers the best performance for Xe Kr separation. |
S1385894720307373 | Microwave heating has been applied to increase the selectivity to propylene in the oxidative dehydrogenation of propane . The preferential heating of the solid monolith allows working with a lower gas phase temperature reducing the formation of undesired by products in the gas phase via homogeneous reactions . Conversion levels of 21 and selectivity to propylene up to 70 have been achieved with MW heated straight channel monolithic reactors coated with a VMgO catalyst . These competitive values contrast with the more limited performance delivered by the same catalytic system when it is subjected to conventional heating in a fixed bed reactor configuration thereby corroborating the advantage of working under a significant gassolid temperature gap to minimize the extent of homogeneous reactions . | Microwave heating promotes higher selectivity to propylene in comparison with conventional heating conditions. Use of structured SiC monoliths as MW absorbers to selectively heat catalyst beds. Gas solid temperature gaps minimize the extent of homogeneous reactions in the oxidative dehydrogenation of propane. |
S1385894720307385 | With the rapid development of novel electrodes towards electrochemical capacitors new materials with reasonable compositions and unique structures are intensively studied in order to achieve a high energy density . NiCo | Core shell structures with NiCo. as core show high performances for supercapacitors. The shell materials are comprehensively reviewed in this work. The mass loading of shell materials and the shape of NiCo. are important for performances. |
S1385894720307397 | Innocuous citric acid modified wood membranes with carboxylic groups hold promise for application in water purification . In spite of this it remains challenging to make COOHs located deep inside wood cell walls due to the recalcitrant structure of the lignocellulosic materials . Herein the WMs were modified via the pretreatment with various NaOH concentrations followed by esterification with CA for tetracycline typical of antibiotics with amide carbonyl group . As NaOH concentration increased from 2 to 6 wood lignin decomposed and finally cellulosic structure began to dissolve . As a result the H bonds of hydroxyl on C3 and C6 changing to C2 and C6 made cellulose I transform to cellulose II . It facilitates the esterification between cellulose and CA to enhance the COOH content . The TC adsorption breakthrough curves showed that the x CAW had an 812 fold enhancement of the effective treatable volume with high adsorption capacity compared with raw wood . The largest amount of TC was adsorbed at pH 5 through the formation of Hbonding between the O | Alkali pretreatment facilitates the wood modification by citric acid CA . COOH groups were introduced to the wood after CA treatment. There is an 812 fold enhancement of the effective treatable volume after wood modification. The H bonding between O. H and O C. of TC mainly formed at pH 5. |
S1385894720307403 | In the present study the co pyrolysis of mahua seeds and waste thermocol blends was performed at 450600C . The obtained co pyrolysis oil was characterized for physicochemical properties and its suitability as an alternative fuel . The performance emission and combustion characteristics of six different CPO diesel blends were also assessed at various engine loads . The experimental results indicated a maximum pyrolysis oil yield of 99.6 for waste thermocol pyrolytic oil and 74.2 for CPO at 525C . The physicochemical characterization specified that CPO has a specific gravity kinematic viscosity and calorific value of 0.91mLg | Co pyrolysis was performed in the temperature range of 450600 C. A maximum liquid product yield of 74.2 was obtained at 525C. The calorific value of co pyrolysis oil was 40.6MJ Kg. The evaluated range of brake thermal efficiency was 27.1 to 30.9 . |
S1385894720307415 | The advancement and exploitation of modern industry has a significant and far reaching impact on water environment prompting to development of advanced technologies for the filtration of oil water emulsion mixtures and purification of soluble organic contaminants . However bifunctional materials capable of continuously filtrating multiphase emulsion mixtures and degrading soluble organic contaminants from wastewater are still a concerning issue . Herein a dual prewetted underwater superoleophobic and underoil superhydrophobic microalgae residue membrane hybrid was developed which demonstrated outstanding performance in the filtration of multiphase emulsion mixtures and catalytic degradation of microplastics released BPA . The combination of underoil superhydrophobic oil containing region with underwater superoleophobic water containing region in an integrated membrane promoted successive filtration of multiphase emulsion mixtures . Additionally DMRM serves as a high performance carbocatalyst for peroxydisulfate activation of rapid elimination of BPA . The reagents used in the integrated DMRM PS system were optimized in a safety dose evaluation by the osteoblasts viability . Hence the presented results will inspire the future comprehensive environmentally friendly treatment of wastewater with integrated systems and advanced membrane technology . | The DMRM shows superior performance for continuously filtering multiphase emulsion mixtures. A novel DMRM AOPs system is established for simultaneously separating insoluble and degrading BPA. This work explored the safety dose of agents in AOPs by measuring the viability of osteoblasts. |
S1385894720307427 | Photocatalysis refers to an environmental friendly technology it is capable of converting scattered and intermittent solar energy into hydrogen energy exhibiting high energy density . CdS acts as a prominent photocatalyst . For its obstinate photocorrosion however the application of CdS in photocatalytic hydrogen evolution reactions has been severely limited . In the present study it was reported for the first time that by coating a Zn anchored carbon layer on CdS | CdS modified by a Zn anchored carbon layer was firstly synthesized. Obtained materials work as outstanding photocatalyst for H. production. Zn containing carbon layer improves the separation efficiency and transfer rate of photogenic carriers on the surface of CdS. Obtained materials may provide potential candidate for PEC and other promising applications. |
S1385894720307439 | Regeneration of spent CNT is one of the most significant steps but usually neglected in adsorption application . In this study microwave ultraviolet system was applied to regenerate spent CNT and further degrade the desorbed tetracycline simultaneously . Both regeneration and mineralization ratios were detected to evaluate the regeneration performance . And they ascended with the increment of microwave power as well as regeneration time . Adsorption capacity of the regenerated CNT recovered to 100 and 37 of tetracycline was mineralized to carbon dioxide at 500W for 2.5min . High total gas flow rate demonstrated negligible impact on mineralization ratio . After 5 adsorption regeneration cycles regeneration and mineralization ratios kept at approximately 80 and 27 respectively while BET surface area went up . Three kinds of reactive oxygen species including ozone hydroxyl radicals and singlet oxygen | Effects of operating conditionon regeneration performance and ozone generation. Detection of ROS ozone OH radical and 1O2 . Degradation pathway of desorbedtetracycline under MW UV irradiation. |
S1385894720307440 | The vanadium redox flow battery is a promising energy storage technology for the power supply from intermittent renewable energy sources . An understanding of the characteristics of coupled mass transport and electrochemical reactions in a VRFB is of great importance for increasing the storage capacity and improving the efficiency . However the dispersion effect in the porous electrode of VRFBs has been ignored in existing modelings . This paper reports on an reactive transport model considering dispersion effect for VRFBs and the model is developed based on a comprehensive description of mass charge and momentum transport and conservation in porous electrodes and combined with a kinetic model for electrochemical reactions . In particular considering the influences of dispersion on the reactive transport behaviors the effective diffusivities of ions and the local mass transfer coefficient are accurately determined by experiments wherein the dispersion effect included . A good agreement is demonstrated between the simulated cell performance and experimental data over the full range of the state of charge . Compared with the results resolved from using the effective diffusivity as Bruggemann correction the cell voltages have little discrepancies while the distributions of vanadium ions concentrations and local current density show obvious differences . The model is then employed to analyze the performance characteristics of VRFBs and to investigate the effects of various operating conditions and structural parameters on the cell performance and system efficiency . The numerical results allow us to identify the key areas of potential improvements to the storage capacity and efficiency of VRFBs . | An reactive transport model considering dispersion effect for VRFBs is reported. The related parameters effected by dispersion are determined accurately. The model is employed to analyze the performance characteristics of VRFBs. |
S1385894720307464 | Solid oxide fuel cell provides a new method for clean and efficient conversion and utilization of hydrocarbon fuels due to its high fuel flexibility . The utilization of biogas fuel through direct internal reforming allows for a simplification of the SOFC system since no external reformer appears strictly necessary . Despite its considerable convenience and potential at present direct internal dry reforming is still not considered as a competitive process for commercial application which is limited by the reaction difficulty and high risk of carbon deposition . To address the problem in this study conventional Ni yttrium stabilized zirconia anodes of SOFCs are modified by two methods i.e . Ce | Conventional Ni YSZ anodes were modified by infiltration and a catalytic layer. Detailed comparison between the modified cells and the bare cell was made. The GDC infiltration on anode is beneficial only in certain cases. Enhancement of cell performance and stability was achieved by the catalytic layer. |
S1385894720307476 | Oxygen carriers based on geopolymer composites with enhanced thermal and mechanical stability have been synthesized and been proposed for chemical looping combustion with oxygen uncoupling . Geopolymer synthesis belongs to green chemistry and ensures chemical and mechanical properties similar to those of high temperature sintering . Suitable metal oxides such as combinations of Cu Mn and Fe oxides have been used as active fillers in geopolymer matrices . Thermogravimetric analysis conducted at 900C pointed out the excellent performance of the CuO based oxygen carrier and the overall performance trend of CuO CuMn oxides MnFe oxides . The performance of the CuO based material around 1.0 wt . of transferred O | Oxygen carriers OCs based on geopolymer and metal oxides were synthesized for CLOU. OCs were tested by TGA at 700 900C in alternating inert and oxidizing atmospheres. CuO based OC showed better CLOU performances 1 wt. carrying capacity . Results were confirmed in fluidized bed reactor with high rate index. OCs highlighted a good mechanical resistance from attrition and crushing tests. |
S1385894720307488 | Lead halide perovskites have great potential applications in light emitting diodes for advanced displays and general lighting due to their excellent optical and electrical properties . However LHPs suffer from toxicity and poor stability . Although the stability of the perovskites can be enhanced by reducing dimensionality doping transition metal ions encapsulating organic polymers or building super hydrophobic structures the improved stability is limited and still can not meet the needs for practical applications . To fundamentally solve the above issues lead free metal halide perovskites have been alternatively developed owing to their low toxicity expected good stability and excellent optical properties . In this review we thoroughly overview recent processes on the synthetic method type structure morphology and optical properties of LFMHPs with a strict perovskite structure as well as on their stabilities against water light or heat . We further highlight their preliminary achievements in display and lighting applications . Finally we address remaining challenges in this exciting field and present our perspectives for further investigations on LFMHPs to enhance the performance and lifetime of LED devices . | Overview recent process on synthesis structure and optical property of LFMHPs. Summary the photoluminescent stability of LFMHPs against water light or heat. Highlight preliminary achievements of LFMHPs in application for LEDs. |
S138589472030749X | To develop a low cost efficient and environmentally benign technique for the simultaneous removal of heavy metals and organic contaminants is a great challenge in practical wastewater treatment . In this work a novel iron modified rectorite composite was prepared via the degradation of Rhodamine B in a Fenton like process and used for the simultaneous degradation of tetracycline hydrochloride and reduction of Cr through heterogeneous photo Fenton processes . The results reveal that the introduction of RhB to the rectorite could induce more iron ions into its interlayers which accelerates the decomposition of H | The simultaneous removal of a heavy metal and organic contaminant was achieved. The introduction of RhB induced more iron ions into the interlayers of a rectorite. TC increased the Cr VI reduction rate 46.4 fold in the Fe R 2 H. LED system. The Fe R 2 H. system exhibited a great photocatalytic activity under sunlight. The mechanism for the simultaneous removal of TC and Cr VI was proposed. |
S138589472030752X | Refined design of sustainable sorbent demands to tackle the strong dependence for additional mesoporous support and low utilization in hot coal gas desulfurization . Unlike the well established preparation of loading sorbents supported on zeolites a vacuum assisted self assemble strategy tapping into the ordered channels of walnut wood is proposed to facilely fabricate three dimensional | 3D self assembly sorbent derived by hierarchical anisotropy of walnut wood. Highest breakthrough sulfur capacity and utilization over 8 Ce Mn. Al. Excellent character of H. O resistance and anti interference for sorbents. Macroporosity of vertical channel improved diffusion of H. S. |
S1385894720307531 | A clean hydrometallurgical process has been developed to efficiently and economically recover selenium copper gold silver and lead from a copper anode slime . The mixture of H | A clean hydrometallurgical process for recovering valuable metals from anode slime was developed. The synergistic mechanism of H. SO. and H. for selenium leaching was proposed. Selenium and copper were recovered from the leachate by a two step reduction process. Gold was selectively recovered by chloride leaching H. reduction. Silver was efficiently recovered by Na. SO. leaching Na. reduction. Elements distribution and cost benefit analyses for this process were performed. |
S1385894720307567 | Metal Organic Frameworks have attracted a lot of attention over the past two decades mainly because their unique set of properties notably their high porosity and surface area are useful for gas storage and separation but these materials are also well suited to the decontamination of liquid effluents . They are synthesized as crystalline solid powders but for a broad applicability producing MOFs as handleable materials is crucial . Furthermore the main challenge for their use in fix bed processes consists in creating and controlling a meso and macroporous network in the body of the material while ensuring the MOFs micropores remain accessible . Two techniques have recently been proposed mechanical shaping and solgel synthesis with the main difficulty in both cases being to retain the properties of the MOFs in the final product because of the pressure or the additives required to pack the powder . The focus of recent developments has therefore been on using mild synthesis conditions . Although relatively few studies have been published to date the field is expanding fast in terms of the techniques proposed and the understanding of the stability of MOFs and their performance as hierarchically porous materials rather than powders . This review will describe current developments in the shaping of MOFs with an emphasis on the design and control of the final porous structure for effluent treatment applications . | MOFs are promising materials for effluent treatment and gas storage application. The design of monolithic MOFs is a key challenge for industrial applications. A hierarchical porosity is crucial to improve the material performances. This review presents MOF shaping methods with a focus on porosity control. Macropores improve fluid transfer and. micropores boost adsorption capacities. |
S1385894720307579 | Photo electrochemical devices based on perovskite photovoltaics that convert abundant solar energy directly into stored electric energy or value added chemicals have great potential to eliminate the intermittency issue of the solar energy supply . Currently tremendous efforts have been made to achieve boosted overall conversion efficiency of PEC devices . In this review we highlight the state of the art representative configurations of the emerging perovskite solar cells based PEC devices including self charging power packs and unassisted solar water splitting CO | Photo electrochemical PEC devices based on perovskite solar cells are reviewed. The electrode materials and performance evaluations of the devices are summarized. The configuration design and integration strategy of the devices are discussed. |
S1385894720307592 | The continuous release of antibiotics in soil environment poses a serious threat for soil and water quality and consequently human health . However research efforts focused on the effective remediation of antibiotic polluted soil are still very limited . In this study a nanosecond pulsed dielectric barrier discharge plasma system was used for the first time to remediate soil contaminated by ciprofloxacin which is one of the most widely used persistent and genotoxic antibiotics . Various cold atmospheric plasma operating parameters were investigated and optimized . The optimal moisture content and air flow rate were determined at 5 and 1.0 L min | Nanosecond pulsed DBD was used for the first time to degrade ciprofloxacin in soil. Very fast and complete degradation of ciprofloxacin in soil by nsp DBD plasma. Significantly high energy efficiency of nsp DBD for soil remediation. Degradation pathway of ciprofloxacin was consistent with singlet oxygen involvement. DBD based degradation of ciprofloxacin in soil imitates its in vivo metabolic profile. |
S1385894720307610 | Bimetallic iron and copper oxide nanoparticles supported on hydroxylated diamond exhibits an improved activity for the heterogeneous Fenton phenol degradation under natural or simulated sunlight irradiation with respect to analogous monometallic samples or than analogous FeCu NPs on graphite activated carbon and P25 TiO | Bimetallic iron copper oxide nanoparticles supported on nanodiamonds have been prepared. The catalyst shows superior activity compared with analogous carbon or TiO2 catalysts. The catalyst shows good recyclability and stability specially working at pH 6. Turn over numbers of 105 000 have been reached for experiments at pH 6. The catalyst decomposes H. to hydroxyl radicals |
S1385894720307634 | The selective conversion of veratryl alcohol a model compound of lignin to produce veratraldehyde was investigated in a simple light driven system consisting of photosynthetic pigment chlorophyllin and VA. Irradiation experiments and liquid chromatography tandem mass spectrometry analysis indicated that light in the wavelength range of 310420nm induced the efficient conversion of veratryl alcohol to veratraldehyde . Results from differential pulse voltammetry and linear sweep voltammetry indicated that light enhanced the two reduction peaks of chlorophyllin and boosted the photocurrent from 2.7 to 3.8A cm | Light induced selective conversion of VA to veratraldehyde by chlorophyllin. Light enhanced reduction peaks of chlorophyllin and photoelectron transfer. was produced via one electron reduction of triplet chlorophyllin. play a leading role in the conversion of VA to veratraldehyde. |
S1385894720307646 | Mercury removal is a hot topic in environments . The present work investigated the adsorption of Hg species on the surfaces of CuS which performs excellently in experiments as adsorbents for mercury removal with the dispersion corrected density functional theory . In this work a pair of asymmetric surfaces marked as | A pair of asymmetric surfaces are selected to present CuS 001 surfaces. Three channels for HCl affecting Hg adsorption on CuS 001 surfaces are discussed. Making Vacancies on slab1 strengthen adsorption between Hg and surfaces but the situation is different for slab2. |
S138589472030766X | Dry reforming of methane is a potentially useful reaction but has some drawbacks catalyst deactivation by coke and yield limited by thermodynamic equilibrium . New improved fluidized bed reactors may compensate these disadvantages . Mathematical models for the dry reforming of methane in three types of fluidized bed reactors have been developed . These reactors include a conventional fluidized bed reactor b two zone fluidized bed reactor which provides simultaneous reaction and catalyst regeneration in a single fluidized bed and c two zone fluidized bed reactor with hydrogen selective membranes which in addition to the previous one provides increased yield to hydrogen because the selective removal of hydrogen through the membrane . The situations where these reactors counteract the two main drawbacks of dry reforming of methane are shown . Comparison with previous experimental results shows that the models predict well the effect of operating conditions . | Mathematical models for DRM in three types of fluidized bed reactors. Model includes two zone fluidized bed reactor with and without membranes. Model agrees with experimental results in the three types of reactor. Model predicts improved stability in two zone fluidized bed reactor. Model predicts increased yield when membranes are added. |
S1385894720307671 | Guided by vacuum referred binding energy diagrams both the trapping and detrapping processes of electrons and holes are explored in the bismuth and lanthanide doped LiREO | Rational design of new Ce. and Bi. storage phosphors for energy storage. Excellent Ce. and Bi. storage phosphors were discovered. Fully control of trap depth by both CB and VB engineering. New mechanism of hole liberation from Bi. and recombination with Bi. New insight of deep understanding storage phosphor mechanisms. |
S1385894720307683 | Due to the limited access to safe drinking water there is an emerging need to have a quick water decontamination strategy wherein all the major contaminants of water like dyes organic compounds and pathogenic bacteria can be removed using a sustainable approach . Herein we introduce a facile method to strongly couple photocatalytic dual active AgBiO | Strongly coupled AgBiO. based recyclable and reusable composite membranes with no significant leaching of Ag ions. Enhanced water flux and protein fouling resistance with FRR 875 and BSA as model foulant. Complete. remediation in the presence of light as well as dark conditions. Effective bactericidal action against secondary wastewater verified by live dead assay. More than 83 degradation of recalcitrant Methylene Blue and 4 Nitrophenol. |
S1385894720307695 | Sepsis and implant related bacterial infections are mainly caused by Gram positive bacteria accompanied with the notorious drug resistance and biofilms formation . Although the recently concerned photothermal therapy shows good performance in killing of planktonic bacteria and removal of biofilms the issue of potential thermal damage to normal tissue is urgent to be solved due to the non targeting to bacteria . Here we constructed a chiral glutamic acid functionalized gold nanobipyramids for enhanced PTT against bacterial and biofilms infections based on both chemical and physical interactions with bacteria . Specifically the conjugation of | The Au NBPs platform combines chemotherapy physiotherapy and PDT three mechanisms. Au NBPs platform showed synergistic functions against biofilms related bacterial infections. Chiral. Glu functionalization enhanced the targeting and interactions with bacterial wall. The sharp tips enabled the penetration into bacterial wall for cicada s wings bionic damage. The targeting to bacterial wall enhanced photothermal therapy against biofilms infections. |
S1385894720307713 | Benzophenone 3 is a potential phenolic endocrine disrupter that is widely used as a sunscreen and ultraviolet stabilizer . The degradation of BP3 in water during chlorination and UV chlorination reactions was investigated . The degradation of BP3 by both reactions followed pseudo first order kinetics . The pH profile of the observed pseudo first order rate constants | The degradation of BP3 in chlorination and UV chlorination were the faster at pH 8. OH radical contribution in UV chlorination to BP3 increased in acidic pH. UV chlorination of BP3 was promoted by HCO. ions and was inhibited by humic acid. Seven transformation products TPs of BP3 were identified during two reactions. Toxicity with. on TPs in UV chlorination was lower than in chlorination. |
S1385894720307725 | Chitosan are deemed as a promising candidate to environmentally friendly materials owing to the inexpensive biodegradable and rich reserves . Nevertheless the application of chitosan materials still confronts chemical instability and low mechanical strength . In this study we grow ultrafine nitrogen doped TiO | core shell microsphere was fabricated by electrostatic self assembly. The adsorption process can effectively accelerate the degradation of pollutants. SPR and photothermal effect can promote the separation of electron holes in N TiO. Adsorption and photothermal catalysis are combined to degrade SDBS and |
S1385894720307737 | In this work Ce and Mn were added to Cu SSZ 39 zeolites by ion exchange process and their activity performance for selective catalytic reduction of NO | Ce Mn incorporation improved the activity and hydrothermal stability of Cu SSZ 39. More active CuO crystallites and stronger acidity contribute high activity after Ce Mn addition. Stable structure acidity and less large Cu oxides promote MnCu SSZ 39 hydrothermally stable. Cu. ion re distribution to ion exchange sites during hydrothermal process over MnCu SSZ 39. NH. SCR reaction over MnCu SSZ 39 follows LH ER and Fast SCR mechanisms. |
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