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Bimetallic Single‑Atom Catalysts for Water Splitting

Nano-Micro Letters 2025年第1期17卷 1-45页

作者： Megha A.Deshmukh Aristides Bakandritsos Radek Zbořil nanotechnology centre Centre for Energy and Environmental TechnologiesVŠB–Technical University of Ostrava17.listopadu 2172/1570800 Ostrava‑PorubaCzech Republic Regional centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute(CATRIN)Palacky University OlomoucŠlechtitelů241/2778371 Olomouc–HoliceCzech Republic

Green hydrogen from water splitting has emerged as a critical energy vector with the potential to spearhead the global transition to a fossil fuel-independent *** field of catalysis has been revolutionized by single-atom catalysts(SACs),which exhibit unique and intricate interactions between atomically dispersed metal atoms and their ***,bimetallic SACs(bimSACs)have garnered significant attention for leveraging the synergistic functions of two metal ions coordinated on appropriately designed *** offer an avenue for rich metal–metal and metal–support cooperativity,potentially addressing current limitations of SACs in effectively furnishing transformations which involve synchronous proton–electron exchanges,substrate activation with reversible redox cycles,simultaneous multi-electron transfer,regulation of spin states,tuning of electronic properties,and cyclic transition states with low activation *** review aims to encapsulate the growing advancements in bimSACs,with an emphasis on their pivotal role in hydrogen generation via water *** subsequently delve into advanced experimental methodologies for the elaborate characterization of SACs,elucidate their electronic properties,and discuss their local coordination ***,we present comprehensive discussion on the deployment of bimSACs in both hydrogen evolution reaction and oxygen evolution reaction,the two half-reactions of the water electrolysis process.

关键词： Single-atom catalysts Single-atom dimers Hydrogen evolution Oxygen evolution Water splitting

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Use of compositional and combinatorial nanomaterial libraries for biological studies

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Science Bulletin 2016年第10期61卷 755-771页

作者： Zhaoxia Ji Center for environmental implications of nanotechnology California Nano Systems Institute University of California

Abstract The rapid development and production of nanomaterials has created some concerns about their potential hazard on the environment, human health and safety. However, since the list of materials that may gen- erate such concerns is very long, it is impossible to test them all. It is therefore usually recommended to use some small compositional nanomaterial libraries to perform ini- tial toxicity screening, based on which combinatorial libraries are then introduced for more in-depth studies. All nanomaterials in the compositional and combinatorial libraries must be rigorously characterized before any bio- logical studies. In this review, several major categories of physicochemical properties that must be characterized are discussed, along with different analytical techniques that are commonly used. Some case studies from the University of California Center for environmental implications of nanotechnology are also chosen to demonstrate the effec- tive use of compositional and combinatorial nanomaterials libraries to identify the role of some key physicochemical properties and to establish true quantitative structure-ac- tivity relationships. Examples on how to use the knowledge generated from those studies to design safer nanomaterials for improved biological applications are also presented.

关键词： Nanomaterial Physicochemical property Characterization nanotechnology Toxicity Compositional library Combinatoriallibrary

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Linking, thinking & fixing:the story about the 2015 Chemistry Nobel Prize and the future of science

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Science Bulletin 2015年第23期60卷 2071-2076页

作者： Huan Meng Olivia J.Osborne Department of Medicine University of California Los Angeles centre for environmental implications of nanotechnology University of California Los Angeles

Did you know there are roughly over 10,000 DNA damages in a cell per day?Do not be too alarmed though,thanks to various vital DNA repair mechanisms we are able to continue function normally as an organism and maintain our genome *** is no wonder then why this year prestigious Chemistry Nobel Prize(s)went to *** Lindahl,Aziz Sancar,and Paul Modrich for their

关键词：诺贝尔化学奖诺贝尔奖连接故事科学脱氧核糖核酸修复机制基因组

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Design of bio-oil additives via molecular signature descriptors using a multi-stage computer-aided molecular design framework

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Frontiers of Chemical Science and Engineering 2022年第2期16卷 168-182页

作者： Jia Wen Chong Suchithra Thangalazhy-Gopakumar Kasturi Muthoosamy Nishanth G.Chemmangattuvalappil Department of Chemical and environmental Engineering University of Nottingham MalaysiaSelangor 43500Malaysia nanotechnology Research Group Centre of Nanotechnology and Advanced MaterialsUniversity of Nottingham MalaysiaSelangor 43500Malaysia

Direct application of bio-oil from fast pyrolysis as a fuel has remained a challenge due to its undesirable attributes such as low heating value,high viscosity,high corrosiveness and storage *** addition is a simple method for circumventing these disadvantages to allow further processing and *** this work,computer-aided molecular design tools were developed to design optimal solvents to upgrade bio-oil whilst having low environmental ***,target solvent requirements were translated into measurable physical *** different property prediction models consist different levels of structural information,molecular signature descriptor was used as a common platform to formulate the design *** of the differences in the required structural information of different property prediction models,signatures of different heights were needed in formulating the design *** to the combinatorial nature of higher-order signatures,the complexity of a computer-aided molecular design problem increases with the height of ***,a multi-stage framework was developed by developing consistency rules that restrict the number of higher-order ***,phase stability analysis was conducted to evaluate the stability of the solvent-oil *** a result,optimal solvents that improve the solvent-oil blend properties while displaying low environmental impact were identified.

关键词： computer-aided molecular design bio-oil additives molecular signature descriptor

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Structural, mechanical and corrosion properties of CNT-304 stainless steel nanocomposites

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Progress in Natural Science:Materials International 2019年第5期29卷 595-602页

作者： A.V.Radhamani Hon Chung Lau S.Ramakrishna Department of Civil and environmental Engineering National University of Singapore Department of Mechanical Engineering Centre for Nanofibers and Nanotechnology National University of Singapore

In this work, a systematic investigation was performed on the structural, mechanical and corrosion properties of CNT incorporated 304 stainless steel. Various concentrations of CNT from 0.5 to 4 wt% were incorporated into the 304 stainless steel matrix to investigate the feasibility of fabrication and enhancement of strength and other material properties. The fabrication of CNT-steel composite was achieved through a spark plasma sintering process at a sintering temperature of 800℃. Raman and morphological studies confirmed that the CNT structure was retained in the sintered pellets. Optimum performance was found at 0.5 wt% CNT giving a Vickers hardness of 351 Hv and compressive yield strength of 404 MPa which were 5.5 and 2.0 times, respectively, those of pristine steel. Corrosion studies with 3.5 wt% Na Cl solution revealed a slight increase in the corrosion rate for CNT dispersed samples.

关键词： Carbon nanotube 304-Stainless steel Spark plasma sintering Hardness Compression Corrosion

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Critical role of immunogenic cell death in cancer therapy

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Science Bulletin 2017年第21期62卷 1427-1429页

作者： tian xia division of nanomedicine department of medicineuniversity of california los angelesCA 90095USA center for environmental implications of nanotechnology(cein) california nano systems institute(cnsi)university of californiaCA 90095USA state key laboratory of environmental chemistry and ecotoxicology research center for eco-environmental scienceschinese academy of sciencesBejing 100085China

In traditional cancer therapy, including chemo and radiation therapy, the goal is always to kill as much cancer cells as possible. However, the truth is that it is difficult to kill 100% of the cancer cells for these therapies and the remaining cells often leads to relapse. So the million-dollar question is, how to eliminate the majority of the remaining cancer cells so that the disease can be manageable in a clinical setting. Currently the best approach that is attracting much attention is cancer immune therapy and excit- ing developments in this field have led to cure in some cases that is unimaginable before [1]. There are two major parts to cancer immune therapy that need to work together to make the therapy successful. One is on the reversal of immune suppressive microen- vironment in cancer to allow the immune cells to target the tumor.

关键词： Critical role of immunogenic cell death cancer therapy

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Hierarchical hollow microspheres assembled from carbon nanosheets integrated with molybdenum carbide nanoparticles for boosting microwave absorption properties

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Nano Research 2025年第1期18卷 10-20页

作者： Zongsheng Chen Yahui Wang Yi Liu Zhigang Li Xiangyin Lv Liping Liu Yajing Chang Jiaming Shi Xiao Zhang State Key Laboratory of Pulsed Power Laser Technology School of Electronic EngineeringNational University of Defense TechnologyHefei 230037China Anhui Provincial Laboratory of Advanced Laser Technology School of Electronic EngineeringNational University of Defense TechnologyHefei 230037China centre for environmental and Energy Nanomaterials Anhui Key Laboratory of Nanomaterials and NanotechnologyCAS Centre for Excellence in NanoscienceInstitute of Solid State PhysicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China

Hierarchical hollow structure has demonstrated potential for enhancing electromagnetic(EM)attenuation and improving impedance matching,garnering significant attention for ***,we have successfully implemented compositional and structural engineering to fabricate hollow Mo2C/C microspheres with controllable composition by coupling interaction between dopamine hydrochloride and ammonium *** the synergistic effect of composition and hollow structure,the strongest reflection loss intensity and broadest effective absorption of the optimized sample reach-70.2 dB and 6.2 GHz,*** formation of hollow heterogeneous structures not only favors impedance matching feature,but also generates considerable contribution to EM attenuation ***,radar cross-section simulation data indicate that hollow Mo2C/C microspheres with compositional optimization and heterogeneous structures have broad prospects for practical applications.

关键词： electromagnetic absorption Mo2C/C microwave absorption hollow structure

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Screening hydroxyapatite for cadmium and lead immobilization in aqueous solution and contaminated soil:The role of surface area

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Journal of environmental Sciences 2017年第2期29卷 141-150页

作者： Hongying Li Xisheng Guo Xinxin Ye Institute of Soil and Fertilizer Anhui Academy of Agricultural Sciences Key Laboratory of Materials Physics Centre for Environmental and Energy Nanomaterials Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Chinese Academy of Sciences

Hydroxyapatite（HAP） has been widely used to immobilize many cationic metals in water and soils. The specific reason why an increase in the surface area of HAP enhances cadmium（Cd） uptake, but has no effect on lead（Pb） uptake, is not clear. The aim of this study was to determine the factors causing the differences in sorption behavior between Cd and Pb by evaluating HAPs with different surface areas. We synthesized HAPs with two different surface areas, which were characterized by X-ray diffraction, N2 adsorption, and scanning electron microscopy, and then evaluated them as sorbents for Cd and Pb removal by testing in single and binary systems. The sorption capacity of large surface area HAP（1.85 mmol/g） for Cd in the single-metal system was higher than that of small surface area HAP（0.64 mmol/g）, but there were no differences between single- and binary-metal solutions containing Pb. After the Cd experiments, the HAP retained a stable structure and intact morphology, which promotes the accessibility of reactive sites for Cd. However, a newly formed precipitate covered the surface and blocked the channels in the presence of Pb, which reduced the number of potential adsorption sites on HAP for Cd and *** experiments using Cd- and Pb-contaminated soil produced similar results to the solution tests. These results indicate that alterations of the structure and morphology during the reaction is an important factor influencing metal sorption to HAP.

关键词： Hydroxyapatite Cadmium Lead Remediation Structure and morphology

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Construction of point-line-plane （0-1-2 dimensional） Fe2O3-SnO2/graphene hybrids as the anodes with excellent lithium storage capability

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Nano Research 2017年第1期10卷 121-133页

作者： Yu Gu Zheng Jiao Minghong Wu Bin Luo Yong Lei Yong Wang Lianzhou Wang Haijiao Zhang Institute of Nanochemistry and Nanobiology Shanghai University Shanghai 200444 China School of environmental and Chemical Engineering Shanghai University Shanghai 200444 China Nanomaterials centre Australian Institute for Bioengineering and Nanotechnology University of Queensland Brisbane QLD 4072 Australia

The assembly of hybrid nanomaterials has opened up a new direction for the construction of high-performance anodes for lithium-ion batteries （LIBs）. In this work, we present a straightforward, eco-friendly, one-step hydrothermal protocol for the synthesis of a new type of Fe2OB-SnO2/graphene hybrid, in which zero-dimensional （0D） SnO2 nanoparticles with an average diameter of 8 nm and one-dimensional （1D） Fe203 nanorods with a length of -150 nm are homogeneously attached onto two-dimensional （2D） reduced graphene oxide nanosheets, generating a unique point-line-plane （0D-1D-2D） architecture. The achieved Fe203-SnO2/graphene exhibits a well-defined morphology, a uniform size, and good monodispersity. As anode materials for LIBs, the hybrids exhibit a remarkable reversible capacity of 1,530 mA·g^-1 at a current density of 100 ma·g^-1 after 200 cycles, as well as a high rate capability of 615 mAh·g^-1 at 2,000 mA·g^-1 Detailed characterizations reveal that the superior lithium-storage capacity and good cycle stability of the hybrids arise from their peculiar hybrid nanostructure and conductive graphene matrix, as well as the synergistic interaction among the components.

关键词： Fe2o3-SnO2/graphene point-line-plane structure synergistic interaction anode materials lithium-ion batteries

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Recent Progress on Visible Light Responsive Heterojunctions for Photocatalytic Applications

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Journal of Materials Science & Technology 2017年第1期33卷 1-22页

作者： Songcan Wang Jung-Ho Yun Bin Luo Teera Butburee Piangjai Peerakiatkhajohn Supphasin Thaweesak Mu Xiao Lianzhou Wang Nanomaterials centre School of Chemical EngineeringAustralian Institute for Bioengineering and NanotechnologyThe University of QueenslandBrisbaneQLD 4072Australia

Photocatalysis has attracted much attention in recent years due to its potential in solving energy and environmental issues. Even though numerous achievements have been made, the photocatalytic systems developed to date are still far from practical applications due to the low efficiency and poor durability. Efficient light absorption and charge separation are two of the key factors for the exploration of high performance photocatalytic systems, which is generally difficult to be obtained in a single photocata- lyst. The combination of various materials to form heterojunctions provides an effective way to better harvest solar energy and to facilitate charge separation and transfer, thus enhancing the photocatalytic activity and stability. This review concisely summarizes the recent development of visible light respon- sive heterojunctions, including the preparation and performances of semiconductor/semiconductor junctions, semiconductor/cocatalyst junctions, semiconductor/metal junctions, semiconductor/non- metal junctions, and surface heterojunctions, and their mechanism for enhanced light harvesting and charge separation/transfer.

关键词： Heterojunction Photocatalysis Water splitting Carbon dioxide reduction Organic pollutant degradation Visible light

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