Formation of mesoporous heterostructured BiVO4/Bi2S3 hollow discoids with enhanced photoactivity

• Main Authors: Gao, Xuehui, Wu, Hao Bin, Zheng, Lingxia, Zhong, Yijun, Hu, Yong, Lou, David Xiong Wen
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Engineering::Chemical engineering
• Online Access: https://hdl.handle.net/10356/105119; http://hdl.handle.net/10220/20515; http://dx.doi.org/10.1002/anie.201403611
• Institution: Nanyang Technological University

Semiconductor heterostructures are of great interest in a wide range of applications. In this work, we design and synthesize a novel heteronanostructure with controlled relative composition, i.e., BiVO4/Bi2S3 hollow discoid-like particles with mesoporous shell. The synthesis involves a facile anion exchange process by reacting pre-synthesized BiVO4 discoid-like particles with Na2S in an aqueous solution. Benefiting from the unique structural features and the formation of heterostructure, the as-prepared BiVO4/Bi2S3 hollow discoids exhibit significantly enhanced photoelectrochemical current response and photocatalytic activity for reduction of CrVI under visible-light illumination.