Fabrication of Z-Scheme WO3/KNbO3 Photocatalyst with Enhanced Separation of Charge Carriers

作     者：ZHENG Xiuzhen HAN Huijuan YE Xiangju MENG Sugang ZHAO Shuangshuang WANG Xiangxiang CHEN Shifu ZHENG Xiuzhen;HAN Huijuan;YE Xiangju;MENG Sugang;ZHAO Shuangshuang;WANG Xiangxiang;CHEN Shifu

作者机构：College of Chemistry and Materials ScienceHuaibei Notmal UniversityHuaihei 235000P.R.China State Key Laboratory of Photocatalysis on Energy and EnvironmentFuzhou UniversityFuzhou 350116P.R.China College of Chemistry and Material EngineeringAnhui Science and Technology UniversityFengyang 233100P.R.China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2020年第36卷第5期

页      面：901-907页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Supported by the National Natural Science Foundation of China(Nos.51472005,51772118 and 21607027) the Natural Science Foundation of Anhui Province,China(No.1608085QB37) the Open Project Program of the State Key Laboratory of Photocatalysis on Energy and Environment,Fuzhou University,China(No.SKLPEE-KF201804) the Natural Science Foundation of Educational Conunittee of Anhui Province,China(Nos.KJ2018A0387 and KJ2019A0601) the Project of Aiiliui Province tor Excellent Young Talents in Universities,Cliina(No.gxyq2019029) the Graduate Innovation Foundation of Huaibei Nonnal University,China(No.ycx201901003) 

主　　题：WO3/KNbO3- Z-Scheme Photogenerated electron and hole Photocatalytic degradation Active species 

摘      要：Z-Schemc photocatalysts as a research locus pertomi strong redox capability and high photocatalytic ***3/KNbO3 photocatalysts were fabricated by ball milling method,and performed higlier photocatalytic activity in liquid degradation(rhodamine B,methylene blue and bisphenol A),compared with WO3 or KNbO3 *** is due to that Z-scheme heterojunction is lonned between WO3 and KNbO3,and the holes photo-excited in valence band of KNbO?are quickly combined with the electrons in conduction band of *** electrons accumulated in conduction band of KNbO3 show high reducibility,thereby reducing O2 to·O 2-,and the holes in valence band of WO3 show high oxidative to oxidize H2O to·OH,***,it is proved by means of electron spin resonaiice(ESR)spectra,terephthalic acid photolumiiiescence probing technique(TA・PL),and UV-Vis absorption spectra of nitroblue *** work indicates that the iabrication of Z-scheme structure can improve the photocatalytic activity by efficiently separating the photogenerated electrons and holes in the photocatalytic reaction system,which is helpful to deeply understand the migration mechanism of photoexcited cairier(band-band transfer and Z-scheme transfer)in heterojunction photocatalysts.