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Bi_2MoO_6/BiVO_4异质结的水热合成和可见光催化活性(英文)
引用本文:林雪,郭晓宇,王庆伟,常利民,翟宏菊.Bi_2MoO_6/BiVO_4异质结的水热合成和可见光催化活性(英文)[J].物理化学学报,2014,30(11):2113-2120.
作者姓名:林雪  郭晓宇  王庆伟  常利民  翟宏菊
作者单位:1. Key Laboratory of Preparation and Application Environmentally Friendly Materials, Ministry of Education, Jilin Normal University, Siping 136000, Jilin Province, P. R. China; 2. College of Chemistry, Jilin Normal University, Siping 136000, Jilin Province, P. R. China
基金项目:supported by the National Natural Science Foundation of China(21407059,61308095);Science Development Project of Jilin Province,China(20130522071JH,20130102004JC,20140101160JC)~~
摘    要:采用一步水热法制备Bi2MoO6/BiVO4复合光催化剂.利用X射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、高分辨透射电子显微镜(HRTEM)等手段对其晶体结构和微观结构进行了表征.结果表明,Bi2MoO6纳米粒子沉积在BiVO4纳米片表面从而形成异质结结构.紫外-可见漫反射光谱(UV-Vis DRS)表明所制备的Bi2MoO6/BiVO4异质结较纯相Bi2MoO6和BiVO4对可见光吸收更强.由于形成异质结结构及其光吸收性能使Bi2MoO6/BiVO4光催化活性有较大提高.可见光下(λ420 nm)光催化降解罗丹明B(RhB)实验结果表明,Bi2MoO6/BiVO4光催化活性较纯相Bi2MoO6和BiVO4高.Bi2MoO6/BiVO4样品光催化性能提高的原因是Bi2MoO6和BiVO4形成异质结,从而有效抑制光生电子-空穴对的复合,增大了可见光吸收范围及比表面积.

关 键 词:Bi2MoO6/BiVO4  复合材料  纳米结构  光催化活性  
收稿时间:2014-06-30

Hydrothermal Synthesis and Efficient Visible Light Photocatalytic Activity of Bi2MoO6/BiVO4 Heterojunction
LIN Xue;GUO Xiao-Yu;WANG Qing-Wei;CHANG Li-Min;ZHAI Hong-Ju.Hydrothermal Synthesis and Efficient Visible Light Photocatalytic Activity of Bi2MoO6/BiVO4 Heterojunction[J].Acta Physico-Chimica Sinica,2014,30(11):2113-2120.
Authors:LIN Xue;GUO Xiao-Yu;WANG Qing-Wei;CHANG Li-Min;ZHAI Hong-Ju
Institution:1. Key Laboratory of Preparation and Application Environmentally Friendly Materials, Ministry of Education, Jilin Normal University, Siping 136000, Jilin Province, P. R. China; 2. College of Chemistry, Jilin Normal University, Siping 136000, Jilin Province, P. R. China
Abstract:A Bi2MoO6/BiVO4 photocatalyst with a heterojunction structure was synthesized by a one-pot hydrothermal method. Its crystal structure and microstructure were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM). The FESEM and HRTEM images indicated that Bi2MoO6 nanoparticles were loaded on the surface of BiVO4 nanoplates to form a heterojunction. The ultraviolet visible (UV-Vis) diffuse reflection spectra (DRS) showed that the resulting Bi2MoO6/BiVO4 heterojunction possessed more intensive absorption within the visible light range compared with pure Bi2MoO6 and BiVO4. These excellent structural and spectral properties endowed the Bi2MoO6/BiVO4 heterojunction with enhanced photocatalytic activity. It was found that the Rhodamine B (RhB) degradation rate with Bi2MoO6/BiVO4 was higher than that with pure BiVO4 and Bi2MoO6 under visible light (λ>420 nm) by photocatalytic measurements. The enhanced photocatalytic performance of the Bi2MoO6/BiVO4 sample can be attributed to the improved separation efficiency of photogenerated hole-electron pairs generated by the heterojunction between Bi2MoO6 and BiVO4, intensive absorption within the visible light range, and high specific surface area.
Keywords:Bi2MoO6/BiVO4  Composite material  Nanostructure  Photocatalytic activity  
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