A Novel Visible-light-responsive Photocatalyst Bi1.5Cr0.5WO6 with Suitable Bandgap Structure and Its Application in Water Decontamination  

作　　者：XIE Li-Yan LIU Ping HUANG Li-Ting WANG Wan-Jun HUANG Jian-Hui 谢丽燕;刘平;黄丽婷;王万军;黄建辉(Fujian Provincial Key Laboratory of Ecology-toxicological Effects&Control for Emerging Contaminants,Key L aboratory of Ecological Environment and Information Atlas in Fujian Provincial University,College of Environmental and Biological Engineering,Putian University,Putian 351100,China;State Key Laboratory of Photocatalysis on Energy and Environment,College of Chemistry,Fuzhou University,Fuzhou 350002,China;Institute of Environmental Health and Pollution Control,School of Environmental Science and Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]Fujian Provincial Key Laboratory of Ecology-toxicological Effects&Control for Emerging Contaminants,Key L aboratory of Ecological Environment and Information Atlas in Fujian Provincial University,College of Environmental and Biological Engineering,Putian University,Putian 351100,China [2]State Key Laboratory of Photocatalysis on Energy and Environment,College of Chemistry,Fuzhou University,Fuzhou 350002,China [3]Institute of Environmental Health and Pollution Control,School of Environmental Science and Engineering,Guangdong University of Technology,Guangzhou 510006,China

出　　处：《Chinese Journal of Structural Chemistry》2019年第6期930-940,共11页结构化学（英文）

基　　金：financially supported by the Natural Science Foundation of Fujian province(2016J05042,2015J01057,2018J01439);Open Fund of State Key Laboratory of Photocatalysis on Energy and Environment(SKLPEE-KF201505);Scientific Project of Putian Science and Technology Bureau(2016S1001);Science and Technology Project of Fujian Provincial Department of Education(JA15444);the Projects of Putian University(2015065,2015081);Program for New Century Excellent Talents in Fujian Province University

摘　　要：Integrating the advantages of Bi and Cr elements in the bandgap engineering of metal oxides, a visible-light-responsive photocatalyst Bi1.5Cr0.5WO6 is successfully constructed and initially applied in water decontamination. The combination of UV-vis diffuses reflectance and the Mott-Schottky curve from electrochemical testing can be used to determine the conduction band and valence band of Bi1.5Cr0.5WO6 to be about –1.26 and 1.42 V, respectively. The location of energy band structure indicates that the superoxide free radical can be produced in Bi1.5Cr0.5WO6 photocatalytic system without hydroxyl group. This speculation is also confirmed by ESR experiment and active radical species scavenging experiments. In addition, the best photocatalytic performance of Bi1.5Cr0.5WO6 obtained under 180 ℃ is attributed to the smallest impedance and the strongest electronic migration capability.

关 键 词：tungsten acid BISMUTH chromium VISIBLE-LIGHT response photocatalysis WATER DECONTAMINATION MALACHITE green 

分 类 号：TQ[化学工程]