期刊
CATALYSIS COMMUNICATIONS
卷 106, 期 -, 页码 1-5出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2017.11.015
关键词
BiOBr microflowers; Solvothermal method; Photocatalysis of RhB
资金
- National Natural Science Foundation of China [21577077, 21377067, 21677086, 21577078]
- Natural Science Foundation for Innovation Group of Hubei Province, China [2015CFA021]
Flower-like bismuth oxybromide (BiOBr) microspheres with highly controllable morphology and photocatalytic activity were facilely synthesized in ethanol using Bi(NO3)(3)center dot 5H(2)O and NaBr. The effects of solvothermal conditions on the morphology and composition were investigated and a mechanism for the microsphere formation was proposed. The temperature and pH of the solvothermal reaction had little effect on morphology but a large effect on visible light photocatalytic activity, which was attributed to changes in the facet intensity ratio, I-110/102. Microspheres prepared at 140 degrees C and pH = 7 had the highest I-110/102 ratio and degraded Rhodamine B (RhB) more rapidly than other BiOBr preparations. The (110) plane has surface Bi3+ sites that coordinate with the carboxylate anion of RhB, thus increasing adsorption but also a stronger internal electric field (IEF) that increases e(-).h(+) separation efficiency. These findings provide a better understanding of the effects of solvothermal conditions on the crystal growth and activity of semiconductor photocatalysts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据