BiOBr three-dimensional micromaterials in a solvothermal system and their photocatalytical property under visible-light irradiation

摘要

In this paper, BiOBr micromaterials with three-dimensional (3-D) microstructures were synthesised in a solvothermal system through modulation of surfactant polyethylene glycol or polyvinylpyrrolidone molecules. The transformation of the 3-D structures to two-dimensional (2-D) microplates along the reaction time was observed. The possible formation mechanism of the 3-D structures was discussed. The BiOBr micromaterials have shown excellent photocatalytical property toward bleaching of methyl blue under visible-light irradiation. The synthetic method would have potential applications in preparing other 3-D microstructures and 2-D microplates.