Decolorization of Methyl Orange Induced by Photolysis of Diiron-Substituted Silicotungstate

doi:10.7517/j.issn.1674-0475.2006.06.444

Abstract

Abstract: Tetrabutylammonium salt of SiW₁₀Fe₂(Fe₂POM) was synthesized and methyl orange (MO) was taken as photodecolorization test compound. Rate of photodecolorization was probed over original concentration of MO, dose of catalyst, diversity of pH. Isopropyl alcohol was taken as ·OH scavenger and mechanism of MO photodecolorization under Fe₂POM-H₂O₂ system was studied. The results indicated that high photodecolorization efficiency was achieved at wide pH range. The photodecolorization of MO at the concentration ranged at 40-160 mg/L was in accordance with apparent first order reaction and the photodecolorization rate decreased with increase of the initial MO concentration. The activity of photodecolorization is in the turn of Fe₂POM-H₂O₂Fe₂POM>blank experiment.

Key words: methyl orange, photodecolorization, diiron-substituted silicotungstate

CLC Number:

O644

Lu Xiao-meng, LIN Jia-min, XIE Ji-min. Decolorization of Methyl Orange Induced by Photolysis of Diiron-Substituted Silicotungstate[J]. Imaging Science and Photochemistry, 2006, 24(6): 444-449.

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Decolorization of Methyl Orange Induced by Photolysis of Diiron-Substituted Silicotungstate

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