V2O5/Al2O3 composite photocatalyst: Preparation, characterization, and the role of Al2O3

被引：104

作者：

Fu, Xianliang ^{[1
]}

Tang, Wenming ^{[1
]}

Ji, Lei ^{[1
]}

Chen, Shifu ^{[1
]}

机构：

[1] Huaibei Normal Univ, Dept Chem, Huaibei 235000, Anhui, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2012年 / 180卷

关键词：

V2O5/Al2O3; Composite photocatalyst; Reduction; Degradation; ILLUMINATED TITANIUM-DIOXIDE; SELECTIVE PHOTOOXIDATION; METHYLENE-BLUE; LIQUID-PHASE; TIO2; REDUCTION; NITROBENZENE; DEGRADATION; TIO2/SIO2; OXIDATION;

D O I：

10.1016/j.cej.2011.11.032

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

An attempt to use Al2O3, as non-semiconductor component to improve the photocatalytic activity of V2O5 was investigated. The composite photocatalysts were synthesized by coprecipitation-calcination process, and then characterized by X-ray powder diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL) emission spectra, transmission electron microscopy (TEM), and Fourier transform infrared (FT-IR) spectra. The photocatalytic activities of the samples were evaluated by reduction of Cr(VI), nitrobenzene (NB), and degradation of methylene blue (MB). The results indicated that the activity of V2O5 could be improved by coupling with Al2O3. The optimum mole ratio of V/Al was found to be 1:1 and the heat treatment condition was at 800 degrees C for 6 h. The improvement of surface OH group population was assumed to responsible for the enhanced activity. According to the photocatalyst band structure and the redox potentials of the substrates, the photocatalytic reaction processes were finally discussed. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：170 / 177

页数：8

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