Journal of Jilin University Science Edition
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CAO Junxia, LIU Chunli, LIAO Liling
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Six phosphotungstic acid salts of Keggin type such as Mg1.5PW12O40,Ba1.5PW12O40,Ca1.5PW12O40,Na3PW12O40,K3PW12O40and (NH4)3PW12O40 were prepared by means of liquid phase method and the surface morphologies and microstructures of the samples were characterized by Xray diffraction (XRD) and transmission electron microscopy (TEM). The photocatalytic activities of the catalysts were investigated by photocatalytic degradation of methyl orange with 250 W high pressure mercury lamp as ultraviolet light source. The results show that the six salt particles keep basic Keggin structure frame, belonging to the Keggin structure heteropoly acid type catalyst. The catalysts that have the better activities for the degradation of methyl orange are Mg1.5PW12O40,Ba1.5PW12O40and Ca1.5PW12O40, among which Mg1.5PW12O40 is the best.
Key words: phosphotungstic acid salts, preparation, photocatalysis
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CAO Junxia, LIU Chunli, LIAO Liling. Preparation, Characterization and Photocatalytic Activity ofKeggin Type of Phosphotungstic Acid Salts[J].Journal of Jilin University Science Edition, 2013, 51(05): 944-948.
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http://xuebao.jlu.edu.cn/lxb/EN/Y2013/V51/I05/944
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