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Research progress of nanoparticles as enzyme mimetics

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Science China(Physics,Mechanics & Astronomy) 2011年第10期54卷 1749-1756页

作者： HU XiaoNa LIU JianBo HOU Shuai WEN Tao LIU WenQi ZHANG Ke HE WeiWei JI YingLu REN HongXuan WANG Qi WU XiaoChun Chinese Academy of Sciences Key Laboratory of Standardization and Measurement.for nanotechnology National Center for Nanoscience and Technology Beijing 100190 China Institute of Surface micro and Nano Materials Xuchang University Xuchang 461000 China National Center for Nanoscience and Technology Beijing 100190 China

Natural enzymes as biological catalysts possess remarkable advantages,especially their highly efficient and selective catalysis under mild ***,most natural enzymes are proteins,thus exhibiting an inherent low durability to harsh reaction *** enzyme mimetics have been pursued extensively to avoid this *** recently,some inorganic nanoparticles(NPs) have been found to exhibit unique enzyme *** addition,their much higher stability overcomes the inherent disadvantage of natural ***,easy mass-production and low cost endow them more *** a new member of artificial enzyme mimetics,they have received intense *** this review article,major progress in this field is summarized and future perspectives are highlighted.

关键词： artificial enzyme mimetics Fe_3O_4 nanoparticles CeO_2 nanoparticles Pt nanoparticles biodetection

Self-propelled Colloid Motors via Controlled Assembly

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Self-propelled Colloid Motors via Controlled Assembly

Catalysis of semihydrogenation of acetylene to ethylene: current trends, challenges, and outlook

全国第十九届大环化学暨第十一届超分子化学学术讨论会

作者：贺强 micro/nanotechnology Research Center Harbin Institute of Technology

＜正＞Molecular self-assembly provides a versatile way to access the cooperation of multifunctional building blocks through non-covalent *** with the top-down approaches,controlled assembly affords the synthetic motors with the advantages of: i) mass production, ii)response to the external stimuli, and iii) access to *** an important branch of controlled assembly, layer-by-layer assembly（LbL） is a versatile tool that can realize the effective control over the structures, compositions, and functionalities of the resulting assembled *** first employed the LbL technology for the controlled fabrication of colloid motors with the structure of the hollow *** presentation will summarize our recent progress on the fabrication, motion control, and applications of self-propelled colloid motors based on controlled LbL assembly.

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Frontiers of Chemical Science and Engineering 2022年第7期16卷 1031-1059页

作者： Toyin D.Shittu Olumide B.Ayodele Department of Chemical and Petroleum Engineering United Arab Emirates UniversityAl-Ain 15551United Arab Emirates Department of micro and Nanofabrication International Iberian Nanotechnology LaboratoryBraga 4715-330Portugal School of Chemical Engineering Engineering CampusUniversity of Science MalaysiaNibong Tebal 14300Malaysia

Ethylene is an important feedstock for various industrial processes, particularly in the polymer industry. Unfortunately, during naphtha cracking to produce ethylene, there are instances of acetylene presence in the product stream, which poisons the Ziegler–Natta polymerization catalysts. Thus, appropriate process modification, optimization, and in particular, catalyst design are essential to ensure the production of highly pure ethylene that is suitable as a feedstock in polymerization reactions. Accordingly, carefully selected process parameters and the application of various catalyst systems have been optimized for this purpose. This review provides a holistic view of the recent reports on the selective hydrogenation of acetylene. Previously published reviews were limited to Pd catalysts. However, effective new metal and non-metal catalysts have been explored for selective acetylene hydrogenation. Updates on this recent progress and more comprehensive computational studies that are now available for the reaction are described herein. In addition to the favored Pd catalysts, other catalyst systems including mono, bimetallic, trimetallic, and ionic catalysts are presented. The specific role(s) that each process parameter plays to achieve high acetylene conversion and ethylene selectivity is discussed. Attempts have been made to elucidate the possible catalyst deactivation mechanisms involved in the reaction. Extensive reports suggest that acetylene adsorption occurs through an active single-site mechanism rather than via dual active sites. An increase in the reaction temperature affords high acetylene conversion and ethylene selectivity to obtain reactant streams free of ethylene. Conflicting findings to this trend have reported the presence of ethylene in the feed stream. This review will serve as a useful resource of condensed information for researchers in the field of acetylene-selective hydrogenation.

关键词： selectivity hydrogenation acetylene ethylene palladium

Dynamic surface wettability of three-dimensional graphene foam

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Chinese Physics B 2014年第4期23卷 472-475页

作者：黄文斌王广龙高凤岐乔中涛王刚陈闽江陶立邓娅孙连峰 Institute of nanotechnology and microsystems Mechanical Engineering College National Center for Nanoscience and Technology

In this work, three-dimensional graphene foams （GFs） are synthesized and characterized by scanning electron micro- scope （SEM） and Raman spectroscopy. The SEM images indicate that after the growth of graphene, the graphene covers the surface of nickel （Ni） foam uniformly. Raman spectra show that the percentages of monolayer, bilayer, trilayer, and multilayer graphenes are - 58%, - 32%, - 8%, and ,.o 2%, respectively. The contact angle （CA）（-- 12°） of water droplet （3 p-L） on GF is found to be larger than that on Ni foam （,- 107°）, indicating that graphenes have changed the surface wettability of the Ni foam. Meanwhile, the dynamic characteristics of CA of water droplet on GF are different from those on Ni foam. The mechanisms for different behaviors are discussed, which are attributed to volatilization and seepage of water droplets.

关键词： graphene foam CVD surface wettability contact angle

Recent progress in sulfur cathodes for application to lithium-sulfur batteries

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Particuology 2021年第5期19卷 1-15页

作者： Yongying Li Joseph G.Shapter Hui Cheng Guiying Xu Guo Gao Key Laboratory for Thin Film and micro Fabrication of the Ministry of Education Department of Instrument Science and TechnologySchool of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Australian Institute of Bioengineering and nanotechnology(AIBN) University of QueenslandSt.LuciaQueensland 4072Australia

Owing to the extensive use of fossil fuels for energy,environmental problems are becoming increasingly ***,renewable clean energy sources must be urgently *** an environmentally friendly electrochemical energy-storage system,lithium-ion batteries(LIBs)are widely used in portable devices,electric vehicles,and medical ***,owing to their high cost and low theoretical energy density,LIBs are far from meeting the current energy ***-sulfur batteries(LSBs)(wherein lithium metal and sulfur are the anode and cathode,respectively)are one of the most valuable secondary batteries because of their high theoretical energy density(-2600Whkg^(-1)).However,the intrinsic conductivity of sulfur cathode materials is poor,and the lithium polysulfide formed during lithiation dissolves ***,the volumetric expansion during charging and discharging adversely affects the LSB electrochemical performance,including the rate performance,cycle life,and coulombic ***,to improve the LSB electrochemical performance,various sulfur composites have been prepared using carbon materials,metallic oxides,and conductive polymers,and various composite cathode materials recently developed for application to LSBs were ***,research directions were proposed for modifying LSB cathode materials.

关键词： Lithium-sulfur batteries(LSBs) Cathode materials Hybrid composites Energy storage

Carbon nanomaterials： controlled growth and field-effect transistor biosensors

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Frontiers of Materials Science 2012年第1期6卷 26-46页

作者： Xiao-Na WANG Ping-An HU Key Laboratory of micro-systems and micro-structures Manufacturing(Ministry of Education) Harbin Institute of TechnologyHarbin 150080China micro/Nano Technology Research Center Harbin Institute of TechnologyHarbin 150080China

Carbon nanostructures, including carbon nanotubes （CNTs） and gra- phene, have been studied extensively due to their special structures, excellent electrical properties and high chemical stability. With the development of nanotechnology and nanoscience, various methods have been developed to synthesize CNTs/graphene and to assemble them into microelectroniclsensor devices. In this review, we mainly demon- strate the latest progress in synthesis of CNTs and graphene and their applications in field-effect transistors （FETs） for biological sensors.

关键词： carbon nanotube (CNT) graphene preparation field-effect transistor(FET) biosensor

Controllable synthesis of Fe–N4 species for acidic oxygen reduction

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Carbon Energy 2020年第3期2卷 452-460页

作者： Xuecheng Yan Yi Jia Kang Wang Zhao Jin Chung-Li Dong Yu-Cheng Huang Jun Chen Xiangdong Yao Queensland micro-and nanotechnology centre Griffith UniversityNathan CampusQueenslandAustralia Department of Chemistry University of Science and Technology BeijingBeijingChina Laboratory of Advanced Power Sources Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchunChina Department of Physics Tamkang UniversityNew Taipei CityTaiwan Intelligent Polymer Research Institute ARC Centre of Excellence for Electromaterials ScienceAIIM FacilityUniversity of WollongongInnovation CampusWollongongNew South WalesAustralia

Controllable design and synthesis of catalysts with the target active sites are extremely important for their applications such as for the oxygen reduction reaction(ORR)in fuel ***,the controllably synthesizing electrocatalysts with a single type of active site still remains a grand *** this study,we developed a facile and scalable method for fabricating highly efficient ORR electrocatalysts with sole atomic Fe-N4 species as the active ***,the use of cost-effective highly porous carbon as the support not only could avoid the aggregation of the atomic Fe species but also a feasible approach to reduce the catalyst *** obtained atomic Fe-N4 in activated carbon(aFe@AC)shows excellent ORR *** half-wave potential is 59 mV more negative but 47 mV more positive than that of the commercial Pt/C in acidic and alkaline electrolytes,*** full cell performance test results show that the aFe@AC sample is a promising candidate for direct methanol fuel *** study provides a general method to prepare catalysts with a certain type of active site and definite numbers.

关键词： atomic Fe-N4 site controllable synthesis fuel cells oxygen reduction reaction

Graphene-CdSe Nanobelt Solar Cells with Tunable Configurations

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Nano Research 2011年第9期4卷 891-900页

作者： Luhui Zhang Lili Fan Zhen Li Enzheng Shi Xinming Li Hongbian Li Chunyan Ji Yi Jia Jinquan Wei Kunlin Wang Hongwei Zhu Dehai Wu Anyuan Cao Department of Advanced Materials and nanotechnology College of Engineering Peking University Beijing 100871 China Key Laboratory for Advanced Materials Processing Technology and Department of Mechanical Engineering Tsinghua University Beijing 100084 China Center for Nano and micro Mechanics Tsinghua University Beijing 100084 China

We have combined two planar nanostructures, graphene and CdSe nanobelts, to construct Schottky junction solar cells with open-circuit voltages of about 0.5 V and cell efficiencies on the order of 0.1%. By covering transparent graphene or carbon nanotube （CNT） films on selected positions along macroscopically long CdSe nanobelts, we have demonstrated the fabrication of active solar cells with many different configurations and parallel connections from individual or multiple assembled nanobelts. The graphene-CdSe nanobelt solar cells reported here show a great flexibility in creating diverse device architectures, and might be scaled up for cell integration based on assembled nanobelt arrays and patterned graphene （or CNT） films.

关键词： Graphene CdSe nanobelts solar cells Schottky junction

Self-assembly fabrication of lignin-derived carbon with dual heteroatoms doping for high-performance supercapacitor

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Collagen and Leather 2023年第3期5卷 93-105页

作者： Zehong Chen Haihong Lai Hao Zhuo Yu Lin Zhong Linxin Zhong Xinwen Peng State Key Laboratory of Pulp and Paper Engineering South China University of Technology381 Wushan RoadTianhe DistrictGuangzhou 510641People's Republic of China Department of Mechanical Engineering National University of Singapore3 Engineering Drive 2Singapore 117576Singapore Queensland micro-and nanotechnology centre School of Environment and ScienceGriffith UniversityNathanQLD 4111Australia

Renewable and low-cost biomass is an ideal sustainable alternative to petroleum-based resources,but producing biomass-based carbon electrode with high performances remains a ***,we propose a facile self-assembly strategy to fabricate a biomass-derived N,S co-doping carbon electrode from lignosulfonate without any activation or template *** advantage of the coordination between Fe ions and lignosulfonate,the resultant carbon exhibits a spherical structure with abundant graphitized nanosheets,leading to a high specific surface area with rational pore structure,which are beneficial to the electron/ion transport and *** high contents of doping N(8.47 wt%)and S(2.56 wt%)significantly boost the electrochemical *** a supercapacitor electrode,the carbon material displays high specific capacitance of 390 F g^(-1),excellent cycling stability and high energy density of 14.7 W h kg^(-1)at a power density of 450 W kg^(-1).This study provides a potential strategy for synthesizing cost-effective heteroatom-doped carbon materials from biomass with abundant functional groups and heteroatom sources,such as chitosan,collagen,and gelatin.

关键词： Biomass Lignosulfonate N S co-doping Self-assembly Supercapacitor