Self-assembly and enhanced visible-light-driven photocatalytic activity of reduced graphene oxide-Bi 2 WO 6 photocatalysts

Nanotechnology Reviews

article

Hongguang Yu¹  Chenglin Chu¹  Paul K. Chu³ 

[1] School of Materials Science and Engineering, Southeast University;Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University;Department of Physics and Materials Science, City University of Hong Kong

关键词: Bi2WO6;    hydrothermal method;    photocatalytic activity;    rGO-BWO;   

DOI  :  10.1515/ntrev-2017-0153

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

The reduced graphene oxide-Bi 2 WO 6 (rGO-BWO) photocatalysts with different R M values (mass ratio of GO and Bi 2 WO 6 ) had been successfully synthesized via hydrothermal method in the presence of GO. When increasing the R M values from 0 to 2%, the evident red shift of the absorption edges of rGO-BWO samples occurred, and the photocatalytic activities for the degradation of Rhodamine-B were enhanced gradually. However, there was a significant blue shift in the absorbance band, and the morphology of the incomplete rGO-BWO microspheres led to the lower photocatalytic activity when R M is increased from 4 to 10%. The enhanced photocatalytic activity can be attributed to the smaller band gap, which means needing less energy for the electron transition, the morphology of the unbroken microsphere that provides more possible reaction sites for the photocatalytic reaction, the appropriate GO content that may effectively mitigate electron-hole pair recombination by the migration of photoinduced electrons.

【 授权许可】

CC BY