Preparation, characterization and photocatalytic activity of Bi2O3-MgO composites

被引：38

作者：

Li, Er-Jun ^{[1
]}

Xia, Kai ^{[1
]}

Yin, Shuang-Feng ^{[1
]}

Dai, Wei-Li ^{[1
]}

Luo, Sheng-Lian ^{[1
]}

Au, Chak-Tong ^{[1
,2
]}

机构：

[1] Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China

[2] Hong Kong Baptist Univ, Dept Chem, Kowloon Tong, Hong Kong, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 125卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Magnesium oxide; Bismuth oxide; Photocatalyst; Visible light photodegradation; VISIBLE-LIGHT IRRADIATION; PHOTOPHYSICAL PROPERTIES; NANOSIZED BI2WO6; RHODAMINE-B; SOLAR-CELLS; DEGRADATION; BIVO4; TIO2; TEMPERATURE; SURFACTANT;

D O I：

10.1016/j.matchemphys.2010.09.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A series of Bi2O3-MgO composites were synthesized by solvent-thermal method. It was found that the Bi2O3-MgO composites perform much better than TiO2 (P25), Bi2O3 and MgO in the photocatalytic degradation of rhodamine B (RhB) in the presence of HCl and under irradiation of visible light (lambda>400 nm). The effects of Bi/Mg molar ratio, crystallization temperature of Bi2O3-MgO and reaction conditions on photocatalytic activity were studied. The best performance was observed over the composite with Bi:Mg molar ratio equal to 2:1 that had been subject to crystallization at 120 degrees C for 20 h. In addition, the photocatalytic efficiency of the composite can be significantly enhanced by the presence of hydrochloric acid. The prepared samples were characterized by XRD and UV-vis DRS techniques. The relationships between the structure and photocatalytic performance of the as-prepared Bi2O3-MgO samples were also investigated. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：236 / 241

页数：6

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