Highly efficient visible light degradation of Rhodamine B by nanophasic Ag3PO4 dispersed on SBA-15

被引:29
作者
Ma, Jianfeng [1 ,2 ]
Li, Liangyin [1 ]
Zou, Jing [1 ]
Kong, Yong [1 ]
Komarneni, Sridhar [2 ]
机构
[1] Changzhou Univ, Sch Environm & Safety Engn, Changzhou 213164, Jiangsu, Peoples R China
[2] Penn State Univ, Mat Res Lab, Mat Res Inst, University Pk, PA 16802 USA
基金
中国国家自然科学基金;
关键词
Silver phosphate; SBA-15; Nanocomposites; Wastewater treatment; ENHANCED PHOTOCATALYTIC ACTIVITY; FACILE SYNTHESIS; FUNCTIONALIZED SBA-15; SUB-MICROCRYSTALS; 110; FACETS; COMPOSITE; NANOCOMPOSITES; SEMICONDUCTOR; NANOCRYSTALS; FABRICATION;
D O I
10.1016/j.micromeso.2014.03.026
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
To improve the catalytic property and reduce the silver consumption, nanophase of silver phosphate was dispersed on the SBA-15 to form the Ag3PO4-SBA-15 nanocomposites. Transmission electron microscopy revealed that crystals of Ag3PO4 of about 14 nm were well dispersed on the surfaces of the SBA-15. Although the surface area of Ag3PO4-SBA-15 decreased compared to the original SBA-15 because of blocked pores by Ag3PO4, there was sufficient adsorption of Rhodamine B leading to its efficient catalytic degradation in visible light. The silver content of the nanocomposite was only 1.69 wt% compared to the 77.3% for pure Ag3PO4 but their catalytic performance was about the same because of well-dispersed nanophase of Ag3PO4 in the former. Under the visible illumination for 70 min, the Rhodamine B concentration decreased to about 10% in both cases suggesting that the new nanocomposite is a highly efficient and cost-effective photocatalyst. (C) 2014 Elsevier Inc. All rights reserved.
引用
收藏
页码:154 / 159
页数:6
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