Photodegradation of acetone over V-Gd-O composite catalysts under visible light.
Photodegradation of acetone over V-Gd-O composite catalysts under visible light.
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DOI：
10.1016/j.jhazmat.2010.04.091
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发表时间：
2010-08
影响因子：
13.6
通讯作者：
Yiming He;Ying Wu;T. Sheng;Xintao Wu
中科院分区：
文献类型：
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作者：
Yiming He;Ying Wu;T. Sheng;Xintao Wu
采用浸渍法制备了一系列可见光活性催化剂V-Gd-O复合材料。在可见光下，V1Gd1Ox型催化剂对丙酮的光降解转化率最高。用X射线衍射仪、傅里叶变换红外光谱、拉曼光谱、比表面积、紫外-可见漫反射光谱和光致发光光谱对复合催化剂的物理和光物理性能进行了表征。表征结果表明，V-Gd-O光催化剂具有三相结构：Gd2O3、GdVO4和V2O5。根据计算的能带位置和荧光光谱，V-Gd-O催化剂的高活性可以归因于GdVO4和V2O5之间的耦合作用，从而延缓了电子-空穴对的复合。
A series of visible light active catalysts, V-Gd-O composites, were prepared by the impregnation method. In the photodegradation of acetone, the highest acetone conversion was obtained on V1Gd1Oxcatalyst under visible light. The physical and photophysical properties of the composite catalyst have been characterized by XRD, FT-IR, Raman, BET surface area, UV–vis diffuse reflectance spectra, and photoluminescence (PL) spectra. The characterization indicates the V-Gd-O photocatalyst exhibits three phases: Gd2O3, GdVO4and V2O5. On the basis of the calculated energy band positions and PL spectra, the high activity of the V-Gd-O catalysts could be attributed to the coupling effect between GdVO4and V2O5in retarding the recombination of electron–hole pairs.