Bi2WO6 doped with rare earth ions:Preparation,characterization and photocatalytic activity under simulated solar irradiation

作者：Chunying Wang,Chuantao Gu,Ting Zeng,Qingqing Zhang,Xianping Luo

摘要：Rare-earth modification Bi2 WO6 composites(RE/Bi2 WO6)were studied by experimental performance and theory computation based on the different 4 f orbits of selected rare earth elements(La,Ce,Gd,and Yb).The prepared RE/Bi2 WO6 was characterized by XRD,SEM/TEM,XPS,UV-vis DRS,and N2 adsorption to learn their physical-chemical properties.Azo dye Rhodamine B(RhB)was photodegraded as a target pollutant to investigate the photocatalytic activity of prepared RE/Bi2 WO6 composites.The results of experiment and computation show that four rare earth elements with different electron configurations retain the phase and morphology of Bi2 WO6 and enhance the removal efficiency of RhB under simulated solar irradiation.The optimum doping contents are 0.01%,0.05%,0.05%and 0.01%for La-,Ce-,Gd-,and Yb-doped Bi2 WO6,respectively.However,light rare earth La and Ce doped composites indicate some difference in visible light adso rption capacity and mineralization on RhB co mpared with heavy rare earth Gd and Yb doped composites.Both La/Bi2 WO6 and Ce/Bi2 WO6 possess larger pore size and higher mineralization ability than Gd/Bi2 WO6 and Yb/Bi2 WO6 under the same experimental conditions while Gd/Bi2 WO6 and Yb/Bi2 WO6 show stronger red shift to the visible light due to the more 4 f electrons.The hole oxidation plays a major role in the photodegradation of RhB by all RE/Bi2 WO6.

发文机构：College of Resource and Environmental Engineering School of Chemistry and Chemical Engineering

关键词：RareearthBi2WO6RhodamineBHoleoxidation4forbit

分类号： X703[环境科学与工程—环境工程]O643.36[理学—物理化学]