Oxygen-deficient bismuth tungstate and bismuth oxide composite photoanode with improved photostability  

作　　者：Hoi Ying Chung Weijian Chen Xiaoming Wen Judy N. Hart Hao Wu Yuekun Lai Rose Amal Yun Hau Ng 

机构地区：[1]Particles and Catalysis Research Croup, School of Chemical Engineering, The University of New South Wales (UNSW) Sydney, NSW 2052, Australia [2]School of Photovoltaic and Renewable Energy Engineering, The University of New South Wales (UNSW) Sydney, NSW 2052, Australia [3]Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Melbourne, VIC 2122, Australia [4]School of Materials Science and Engineering, The University of New South Wales (UNSW) Sydney, NSW 2052, Australia [5]National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China

出　　处：《Science Bulletin》2018年第15期990-996,共7页科学通报（英文版）

基　　金：supported by the Australian Research Council under the Laureate Fellowship Scheme(FL140100081)

摘　　要：A homogeneous layer of Bi_2O_3-Bi_(14)WO_(24) composite(BWO/Bi_2O_3) thin film was fabricated using a combination of electrodeposition and thermal treatment. The evenly distributed Bi14 WO24 component within the Bi_2O_3 layer was found to be important in stabilising the photoelectrochemical performances of Bi_2O_3 photoanode by promoting the photoelectron transport. The unmodified Bi_2O_3 suffered from severe photocorrosion as proven by X-ray diffraction(XRD) and inductively coupled plasma(ICP) analyses while the composite thin film was active without noticeable activity decay for at least 3 h of illumination. This strategy might be applicable to other photocatalysts with stability issues.A homogeneous layer of Bi2O3-Bi14WO24 composite （BWO/Bi2O3） thin film was fabricated using a combi- nation of electrodeposition and thermal treatment. The evenly distributed Bi14WO24 component within the Bi2O3 layer was found to be important in stabilising the photoelectrochemical performances of Bi2O3 photoanode by promoting the photoelectron transport. The unmodified Bi2O3 suffered from severe photocorrosion as proven by X-ray diffraction （XRD） and inductively coupled plasma （ICP） analyses while the composite thin film was active without noticeable activity decay for at least 3 h of illumination. This strategy might be applicable to other photocatalysts with stability issues.

关 键 词：Bismuth oxide Bismuth tungstate PHOTOCORROSION 

分 类 号：TB383.2[一般工业技术—材料科学与工程]