CuAl2O4 powder synthesis by sol-gel method and its photodegradation property under visible light irradiation |
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| Authors: | Jiang Yanyan Li Jinggang Sui Xiaotao Ning Guiling Wang Chengyu Gu Xiumei |
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| Institution: | (1) State Key Laboratory of Fine Chemicals and School of Chemical Engineering, Dalian University of Technology, Dalian, 116012, China;(2) School of Chemical Engineering and Materials, Dalian Institute of Light Industry, Dalian, 116034, China;(3) Institute of Glass and new Inorganic Materials, Dalian Institute of Light Industry, Dalian, 116034, China |
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| Abstract: | Nanocrystalline spinel CuAl2O4 powders were prepared by sol-gel method from nitrate Cu(NO3)2·3H2O, Al(NO3)3·9H2O and complex C6H8O7·H2O. Sintering was carried out at 400, 500, 600, 700, 800°C respectively for 2 h in air. The XRD patterns started to appear
CuAl2O4 peaks after sintering of 500°C and consist of only CuAl2O4 peaks as spinel crystal after sintering of 700°C. The powders were analyzed by TEM and UV-vis diffuse reflectance spectrum
to be round, about 10–30 nm in size and Eg=1.77 eV. Photodegradation property of nanocrystalline CuAl2O4 powders was investigated by using methyl orange as model pollutant and mercury lamp (λ>400 nm) as energy source. The results
indicated that CuAl2O4 powders sintered at 700°C had the excellent visible photocatalytic property. Under the irradiation of visible light, methyl
orange could be degraded 97% in 120 min. |
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| Keywords: | Sol-gel method Visible photodegradation Spinel Nanocrystalline Copper aluminum oxide |
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