CuAl1.6Fe0.4O4/凹凸棒石复合材料的制备及可见光催化性能研究

CuAl_1.6Fe_0.4O₄/凹凸棒石复合材料的制备及可见光催化性能研究

苏广慧，陈龙，崔佳萌，沈孟，汪祥，张超，王君霞*，吴秀玲

（中国地质大学（武汉）材料与化学学院，湖北武汉430074）

摘  要:采用溶胶-凝胶法制备了CuAl_1.6Fe_0.4O₄ 尖晶石，以凹凸棒石为载体，合成了CuAl_1.6Fe_0.4O₄/凹凸棒石复合材料。采用X射线粉末衍射（XRD）、扫描电镜（SEM）以及紫外-可见（UV-Vis）吸收光谱测试技术对样品的结构、形貌、吸光性能进行了表征和分析，同时以500W氙灯为光源，亚甲基蓝为降解对象，测试了其可见光催化活性，并详细考察了尖晶石负载量对其光催化性能的影响。实验结果表明，当尖晶石负载量为40%时，其可见光降解性能最佳，最佳降解率达到了98.55%。

关键词: 尖晶石；凹凸棒石；可见光催化；亚甲基蓝

中图分类号：O643；O644；TG115.21⁺5.3；TG115.23          文献标识码：A  

 doi：10.3969/j.1000-6281.2014.03.002

Preparation and photocatalytic activities of CuAl_1.6Fe_0.4O₄/PG composite materials

SU Guang-hui, CHEN Long, CUI Jia-Meng, SHEN Meng, WANG Xiang, ZHANG Chao, WANG Jun-xia

(Faculty of Materials Science and Chemistiy, China University of Geosciences, Wuhan Hubei 430074, China)

Abstract：The CuAl_1.6Fe_0.4O₄spinel was prepared by sol-gel method and was loaded onpalygorskiteto obtain the CuAl_1.6Fe_0.4O₄/PG composite materials. The structure, morphology and light absorption performance of samples were characterized by means of XRD, SEM, and UV-Vis, respectively. The samples with different loading amounts of spinel were applied to degrade the methylene blue solution under the 500Wxenonlampto test its photocatalytic property. Theexperimental resultsshowedthatthe photocatalytic propertywas the best when the loadingamounts ofspinelwere 40%. The degradation rate was up to 98.55% after 3 hours.

Keywords:spinel；palygorskite；visible light catalysis；methylene blue

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