硅酸盐学报2017，Vol.45Issue(4)：572-578,7.DOI:10.14062/j.issn.0454-5648.2017.04.18
混合溴源制备BiOBr微球及其可见光催化性能
Preparation of BiOBr Microspheres with Mixed Bromine Sources and Their Visible-light Photocatalytic Activity
摘要
Abstract
BiOBr microspheres were synthesizedvia a hydrothermal method with mixed bromine sources (i.e., CTAB, NaBr), Bi(NO3)2·5H2O as reactants, ethylene glycol (EG) as a solvent. The phase structure and morphology of BiOBr samples were characterized. The photocatalytic activity of BiOBr microspheres prepared by a single source and mixed source were evaluatedviathe degradation of rhodamine B (RhB) under simulated sunlight irradiation using RhB as a target pollutant. The results show that the prepared BiOBr crystals are flakes, the aggregates are spherical, and the size is between 3-4μm. The BiOBr microspheres prepared with mixed bromine source at then(CTAB):n(NaBr) molar ratio of 1:1 have the maximum specific surface area, the highest exposure degree of (110) crystal plane, the widest range of visible light utilization and the greatest photocatalytic activity. In the visible light irradiation for 50 min, the degradation rate of RhB is 94.46%, and the photocatalytic activity of BiOBr prepared with single bromine source is increased by 19.5%. The degradation rate of RhB is still above 90% after recycled for 8 times, indicating the composite has a superior stability.关键词
混合溴源/溴氧化铋微球/罗丹明B/可见光催化Key words
mixed bromine sources/bismuth oxybromidemicrospheres/rhodamine B/visible-light photocatalysis分类
资源环境引用本文复制引用
方俊华,张凯,张伟,罗茜平,姚舒欣..混合溴源制备BiOBr微球及其可见光催化性能[J].硅酸盐学报,2017,45(4):572-578,7.基金项目
国家"水体污染控制与治理"科技重大专项(2012ZX07307-001). （2012ZX07307-001）
