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Lateral resistance reduction induced by light-controlled leak current in silicon-based Schottky junction

Chinese Physics B 2015年第10期24卷 448-452页

作者：王拴虎张勖邹吕宽赵靓王文鑫孙继荣 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Lateral resistance of silicon-based p-type and n-type Schottky junctions is investigated. After one electrode on a metallic film is irradiated, the differential lateral resistance of the system is dependent on the direction of the bias current：it keeps constant in one direction and decreases in the opposite direction. By systematically investigating the electrical potential changes in silicon and the junction, we propose a new mechanism based on light-controlled leak current. Our work provides an insight into the nature of this phenomenon and will facilitate the advanced design of switchable devices.

关键词： resistance reduction Schottky junction photovoltaic effect

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Photocatalysis: Single‐Atom Engineering of Directional Charge Transfer Channels and Active Sites for Photocatalytic Hydrogen Evolution (Adv. Funct. Mater. 32/2018)

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advanced Functional materials 2018年第32期28卷

作者： Shaowen Cao Han Li Tong Tong Hsiao‐Chien Chen Anchi Yu Jiaguo Yu Hao Ming Chen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 P. R. China Department of Chemistry National Taiwan University Taipei 10617 Taiwan Department of Chemistry Renmin University of China Beijing 100872 P. R. China Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia

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Cocatalyzing Pt/PtO Phase-Junction Nanodots on Hierarchically Porous TiO2 for Highly Enhanced Photocatalytic Hydrogen Production

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ACS applied materials & interfaces 2017年第35期9卷 29687-29698页

作者： Xiao-Ning Ren Zhi-Yi Hu Jun Jin Liang Wu Chao Wang Jing Liu Fu Liu Min Wu Yu Li Gustaaf Van Tendeloo Bao-Lian Su Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 Hubei China. EMAT (Electron Microscopy for Materials Science) University of Antwerp 171 Groenenborgerlaan B-2020 Antwerp Belgium. School of Materials Science and Engineering Zhejiang University 38 Zheda Road 310027 Hangzhou China. Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B-5000 Namur Belgium. Clare Hall University of Cambridge Cambridge CB21 EW United Kingdom.

Phase-junctions between a cocatalyst and its semiconductor host are quite effective to enhance the photocatalytic activity and are widely studied, while reports on the phase-juncted cocatalyst are still rare. In this work, we report the deposition of the Pt/PtO phase-juncted nanodots as cocatalyst via NaOH modification of an interconnected meso-macroporous TiO network with high surface area and inner-particle mesopores to enhance the performance of photocatalytic H production. Our results show that NaOH modification can largely influence Pt/PtO phase-juncted nanodot formation and dispersity. Compared to the TiO nanoparticles, the hierarchically meso-macroporous TiO network containing 0.18 wt % Pt/PtO phase-juncted cocatalyst demonstrates a highest photocatalytic H rate of 13 mmol g h under simulated solar light, and possesses a stable cycling activity without obvious decrease after five cycles. Such high H production performance can be attributed to both the phase-juncted Pt/PtO providing more active sites while PtO suppresses the undesirable hydrogen back reaction, and the special hierarchically porous TiO network with inner-particle mesopores presenting short diffusion path lengths for photogenerated electrons and enhanced light harvesting efficiency. This work suggests that Pt/PtO phase-juncted cocatalyst on hierarchically porous TiO nanostructures is a promising strategy for advanced photocatalytic H production.

关键词： Pt/PtO phase-junction nanodots biomolecular self-assembly cocatalyst hierarchically meso-macroporous TiO2 photocatalytic H2 production

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Phosphorene Co‐catalyst Advancing Highly Efficient Visible‐Light Photocatalytic Hydrogen Production

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Angewandte Chemie 2017年第35期129卷

作者： Jingrun Ran Bicheng Zhu Shi‐Zhang Qiao School of Chemical Engineering University of Adelaide Adelaide SA 5005 Australia State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 P.R. China

Transitional metals are widely used as co‐catalysts boosting photocatalytic H 2 production. However, metal‐based co‐catalysts suffer from high cost, limited abundance and detrimental environment impact. To date, metal‐free co‐catalyst is rarely reported. Here we for the first time utilized density functional calculations to guide the application of phosphorene as a high‐efficiency metal‐free co‐catalyst for CdS, Zn 0.8 Cd 0.2 S or ZnS. Particularly, phosphorene modified CdS shows a high apparent quantum yield of 34.7 % at 420 nm. This outstanding activity arises from the strong electronic coupling between phosphorene and CdS, as well as the favorable band structure, high charge mobility and massive active sites of phosphorene, supported by computations and advanced characterizations, for example, synchrotron‐based X‐ray absorption near edge spectroscopy. This work brings new opportunities to prepare highly‐active, cheap and green photocatalysts.

关键词： Cokatalystoren Dichtefunktionalrechnungen Phosphoren Photokatalyse Wasserstofferzeugung

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Enhancement and Optimization of ATO Nano-crystalline Films Properties by the Addition of Acetylacetone as Modifier in the Sol-gel Process

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Journal of Wuhan University of technology(materials Science) 2015年第5期30卷 873-881页

作者： Galaviz-pérez J A CHEN Fei SHEN Qiang Vargas-garcía J R 张联盟 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Dept.of Materials and Metallurgical Eng. National Polytechnic Institute

Sb-doped Sn O2(ATO) thin films have been prepared using the spin coating method by selecting the proper amount of acetylacetone as solution modifier. All ATO powders and films exhibited the cassiterite rutile-like structure in a crystal size below 10 nm under all the experimental conditions and a nonpreviously reported crystal structure was observed at high acetylacetone loads. The acetylacetone molar ratio influenced notably the optical and electrical properties of ATO films. When prepared at an acetylacetone molar ratio of 4, ATO films exhibited optical transparencies above 90% in the visible region and above 40% in the UV region for thicknesses of 100 and 300 nm. Films in a thickness of 100 nm and at an annealing temperature of 650 ℃ accounted for a high transparency of 97% in the visible wavelength. Films prepared at an acetylacetone molar ratio of 4 exhibited an electric resistivity of 1.33×10-3 Ω·cm at an annealing temperature of 650 ℃. The optimal Sb content for ATO films was found to be 8 at%. The relationships among the properties of starting solutions, the experimental parameters, and properties of ATO films are discussed.

关键词： tin oxide films antimony doping acetylacetone optical transparency electric properties

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Microstructure and Mechanical Performance of Cu-SnO_2-rGO based Composites Prepared by Plasma Activated Sintering

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Journal of Wuhan University of technology(materials Science) 2015年第6期30卷 1152-1158页

作者：罗国强 HUANG Jing JIN Zhipeng LI Meijuan JIANG Xiaojuan SHEN Qiang ZHANG Lianmeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Department of Chemistry Wuhan University of Technology City College of Science and Technology Chongqing University

A novel chemical technique combined with unique plasma activated sintering（PAS） was utilized to prepare consolidated copper matrix composites（CMCs） by adding Cu-SnO2-rGO layered micro powders as reinforced fillers into Cu matrix. The repeating Cu-SnO2-rGO structure was composed of inner dispersed reduced graphene oxide（r GO）, SnO2 as intermedia and outer Cu coating. SnO2 was introduced to the surface of rGO sheets in order to prevent the graphene aggregation with SnO2 serving as spacer and to provide enough active sites for subsequent Cu deposition. This process can guarantee rGO sheets to suffi ciently disperse and Cu nanoparticles to tightly and uniformly anchor on each layer of rGO by means of the SnO2 active sites as well as strictly control the reduction speed of Cu^2＋. The complete cover of Cu nanoparticles on rGO sheets thoroughly avoids direct contact among rGO layers. Hence, the repeating structure can simultaneously solve the wettability problem between rGO and Cu matrix as well as improve the bonding strength between rGO and Cu matrix at the well-bonded Cu-SnO2-rGO interface. The isolated rGO can effectively hinder the glide of dislocation at Cu-rGO interface and support the applied loads. Finally, the compressive strength of CMCs was enhanced when the strengthening effi ciency reached up to 41.

关键词： graphene Cu-SnO2-rGO structure copper matrix composites sensitization plasma activated sintering mechanical property

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Correction: An overview of metamaterials and their achievements in wireless power transfer

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Journal of materials Chemistry C 2018年第15期6卷 4328-4328页

作者： Kai Sun Runhua Fan Xihua Zhang Zidong Zhang Zhicheng Shi Ning Wang Peitao Xie Zhongyang Wang Guohua Fan Hu Liu Chuntai Liu Tingxi Li Chao Yan Zhanhu Guo College of Ocean Science and Engineering Shanghai Maritime University Shanghai 201306 China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) Shandong University Jinan China Integrated Composites Laboratory (ICL) Department of Chemical & Biomolecular Engineering University of Tennessee Knoxville TN 37996 USA Institute of Material Science and Engineering Ocean University of China Qingdao China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan University Haikou 570228 P. R. China National Engineering and Research Center for Advanced Polymer Processing Technology Zhengzhou University Zhengzhou China College of Materials Science and Engineering Shandong University of Science and Technology Qingdao China School of Material Science and Engineering Jiangsu University of Science and Technology Zhenjiang Jiangsu China

Correction for ‘An overview of metamaterials and their achievements in wireless power transfer’ by Kai Sun et al., J. Mater. Chem. C, 2018, DOI: 10.1039/c7tc03384b.

Correction for ‘An overview of metamaterials and their achievements in wireless power transfer’ by Kai Sun et al., J. Mater. Chem. C, 2018, DOI: 10.1039/c7tc03384b.

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Preface to Special Issue on Photocatalysis for celebrating the 20^(th) anniversary of Professor Jimmy C. Yu's return to Hong Kong and leading photocatalytic research there

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Chinese Journal of Catalysis 2015年第12期36卷 2047-2048页

作者：余家国林隽 State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Department of Chemistry Renmin University of China

It is a pleasure to dedicate this special issue of Chinese Journal of Catalysis（CJC）to *** ***,Choh-Ming Li Professor of Chemistry at The Chinese University of Hong *** is to celebrate the 20th anniversary of his re... 详细信息

关键词： pleasure Jimmy return photocatalytic celebrate distinguished helping anniversary strive

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Photocatalysis: Homojunction of Oxygen and Titanium Vacancies and its Interfacial n–p Effect (Adv. Mater. 32/2018)

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advanced materials 2018年第32期30卷

作者： Si‐Ming Wu Xiao‐Long Liu Xi‐Liang Lian Ge Tian Christoph Janiak Yue‐Xing Zhang Yi Lu Hao‐Zheng Yu Jie Hu Hao Wei Heng Zhao Gang‐Gang Chang Gustaaf Van Tendeloo Li‐Ying Wang Xiao‐Yu Yang Bao‐Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics The Chinese Academy of Sciences Wuhan 430071 China Institut für Anorganische Chemie und Strukturchemie Heinrich‐Heine‐Universität Düsseldorf 40204 Düsseldorf Germany Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules College of Chemistry and Chemical Engineering Hubei University Wuhan 430062 China EMAT (Electron Microscopy for Materials Science) University of Antwerp Groenenborgerlaan 171 B‐2020 Antwerpen Belgium School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B‐5000 Namur Belgium

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Efficient Co3O4 Nanorod-Supported Pt Catalyst for Room-Temperature Decomposition of HCHO

Efficient Co3O4 Nanorod-Supported Pt Catalyst for Room-Tempe...

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第二届湖北省化学化工青年科学家论坛

作者： Zhihua Xu Zhaoxiong Yan Jiaguo Yu Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education and Hubei Key Laboratory of Industrial Fume and Dust Pollutio ControlJianghan University State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Formaldehyde（HCHO）emitted from the widely used building and furnishing materials,etc.,is regarded as a typical indoor air *** formaldehyde（HCHO）from air at room（ambient）temperature by effective catalysts is of significance for improving indoorair *** catalysts with high efficiency and good recyclability are highly *** this study,Pt supported on

关键词： Efficient Co3O4 Nanorod-Supported Pt Catalyst for Room-Temperature Decomposition of HCHO

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