Preparation,characterization of Mo,Ag-loaded BiVO_4 and comparison of their degradation of methylene blue

作     者：LIU KunJie CHANG ZhiDong LI WenJun CHE Ping ZHOU HuaLei 

作者机构：Department of Chemistry and Chemical EngineeringSchool of Chemical and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2012年第55卷第9期

页      面：1770-1775页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural ScienceFoundation of China (20876157) 

主　　题：Mo-BiVO4 Ag-BiVO4 visible light photocatalyst isoelectric point 

摘      要：Two types of metal-loaded visible-light-driven photocatalysts,Mo-BiVO4and Ag-BiVO4,were synthesized by wet impregnation *** poperties were characterized by UV-vis diffuse reflectance spectroscopy,X-ray diffraction,field emission scanning electron microscopy,X-ray photoelectron spectroscopy and low temperature nitrogen *** activity of the obtained materials was investigated through degrading methylene blue(MB) solution under visible-light *** results reveal that both metal loaded-BiVO4catalysts have monoclinic scheelite *** and Ag exist as oxides on the surface of the *** changes of absorption in visible-light region,band gap(E g) and specific surface area(A BET) caused by loading Ag are more obvious than those caused by loading *** the isoelectric point of Ag-BiVO4decreases less than that of *** catalysts show higher photocatalytic activity than pure BiVO4,resulting in the significantly improved efficiency of degradation of *** the degradation efficiency of these two metal-loaded BiVO4photocatalysts is similar to each ***,mechanisms of such enhancement are *** decrease of isoelectric point helps Mo-BiVO4improve the degradation *** for Ag-BiVO4,the augmentation of absorption in visible-light region as well as the abatement of E g plays more important roles.