Self-Assembled 3-D Architectures of BiOBr as a Visible Light-Driven Photocatalyst

作者：Jun Zhang, Fengjun Shi, Jing Lin, Dongfeng Chen, Jianming Gao, Zhixin Huang, Xiaoxia Ding, Chengcun Tang · 发表于：Chemistry of Materials · 年份：2008 · DOI：10.1021/cm7031898 · 被引用次数：435 · 研究领域：Advanced Photocatalysis Techniques、Gas Sensing Nanomaterials and Sensors、Ga2O3 and related materials

In this work, we demonstrated the EG-assisted solvothermal synthesis of 3-D microspherical BiOBr architectures assembled by nanosheets. The morphology and compositional characteristics of the 3-D architectures were investigated by various microscopy techniques. The possible formation mechanism for the architectures was discussed. The band gap of the obtained BiOBr materials was estimated to be 2.54 eV by UV–vis. The specific surface area and porosity of the BiOBr 3-D architectures also were investigated by using nitrogen adsorption and desorption isotherms. Because of the narrow bandgap and the novel 3-D micro-/nanostructure, the BiOBr architectures show a more excellent photocatalytic activity under visible light irradiation than the BiOBr bulk plates. Several possible reasons for the higher photocatalytic activity have been taken into consideration. In addition, the photocatalyst is stable during the reaction and can be used repeatedly.