Significant improvement of photocatalytic activity of porous graphitic-carbon nitride/bismuth oxybromide microspheres synthesized in an ionic liquid by microwave-assisted processing

被引：18

作者：

He, Minqiang ^{[1
]}

Zhao, Dexiang ^{[1
]}

Xia, Jiexiang ^{[1
]}

Xu, Li ^{[1
]}

Di, Jun ^{[1
]}

Xu, Hui ^{[2
]}

Yin, Sheng ^{[1
]}

Li, Huaming ^{[1
]}

机构：

[1] Jiangsu Univ, Sch Chem & Chem Engn, Zhenjiang 212013, Peoples R China

[2] Jiangsu Univ, Sch Environm, Zhenjiang 212013, Peoples R China

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2015年 / 32卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Ionic liquids; Microwave; Porous microspheres; Photocatalysis; BIOX X; CL; DEGRADATION; MORPHOLOGY; SIZE; C3N4; BR;

D O I：

10.1016/j.mssp.2014.12.032

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Graphitic-carbon nitride/bismuth oxybromide (g-C3N4/BiOBr) porous microspheres have been successfully synthesized by a one-pot ethylene glycol (EG) assisted microwave process in the presence of 1-hexadecyl-3-methylimidazolium bromine ([C(16)mim]Br). The as-prepared samples are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and UV-vis diffuse reflectance spectroscopy (DRS). During the reaction process, the ionic liquid acts not only as solvent and Br source but also as a template for fabrication of g-C3N4/BiOBr porous microspheres. In addition, the photocatalytic activity of the g-C3N4/BiOBr is evaluated by degrading Rhodamine B (RhB) and ciprofloxacin (UP) under visible-light irradiation. It is found that 12.75 wt% g-C3N4/BiOBr microspheres exhibit higher photocatalytic activity than that of the as-prepared BiOBr. A possible photocatalytic mechanism based on the relative band positions of g-C3N4/BiOBr has been proposed. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：117 / 124

页数：8

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