Structure and Photocatalytic Performance of SO42-/TiO2-SiO2 Solid Superacid

Abstract

Abstract: Aseries of SO₄^2-/TiO₂-SiO₂ catalysts with different mass fractions of SiO₂ were prepared by sol gel method. The effect of adding SiO₂ on the crystal structure, specific surface area, oxygen adsorption, and acidity of SO₄^2-/TiO₂ catalyst and its photocatalytic property for degradation of bromomethane was studied. The results showed that the specific surface area and amount of oxygen adsorption of catalyst were increased by addition of SiO₂, leading to the obvious increase on photocatalytic activity of SO₄^2-/TiO₂-SiO₂ catalysts and mineralization ratio of bromomethane. Comparing with SO₄^2-/TiO₂, the acidic strength and anti moisture ability of SO₄^2-/TiO₂-SiO₂ catalyst were decreased.

Key words: Photocatalytic performance, Solid superacid, SO₄^2-/TiO₂-SiO₂

CLC Number:

O643

TrendMD:

SU Wen-Yue, CHEN Yi-Lin, FU Xian-Zhi, WEI Ke-Mei . Structure and Photocatalytic Performance of SO₄^2-/TiO₂-SiO₂ Solid Superacid[J]. Chem. J. Chinese Universities, 2002, 23(7): 1398.

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Structure and Photocatalytic Performance of SO₄^2-/TiO₂-SiO₂ Solid Superacid

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