Preparation of Visible Light Response Pt-doped La2O3/TiO2 and Thermo-photocatalytic Degradation of Toluene

doi:10.3724/SP.J.1077.2011.01175

Abstract

Abstract: Pt-La₂O₃/TiO₂ photocatalyst was prepared by Sol-Gel and photodeposition methods using Ti(OBu)₄ and La(NO)₃·6H₂O as raw material. The catalyst was characterized by XPS, FTIR, XRD, DRS, TEM, and N2(77K) adsorption. The performance of photocataltic in the removal of toluene under visible light and the influence of temperature on removal of toluene were investigated. The results showed that doped-Pt existed as the forms of single Pt and oxygen-adsorption. Pt loading had no influence on the phase composition of TiO₂, but decreased TiO₂particle size and increased the surface area. Nano-Pt was uniformly dispersed on La₂O₃/TiO₂ with diameter of 5-10 nm. Pt-La₂O₃/TiO₂has much more hydroxyl group than TiO₂ and La₂O₃/TiO₂. The rate of photocatalytic oxidation gaseous toluene on Pt-La₂O₃/TiO₂increased with the temperature increasing, and thermal catalytic reaction taken place in parallel with photocatalytic oxidation reaction. There is a synergetic effect between photocatalysis and thermal catalysis in the thermo-photocatalysis degradation of toluene.

Key words: visible light, Pt loading, La₂O₃/TiO₂, TiO₂, toluene

CLC Number:

TB333

ZHONG Xin, SUN Jian, LIU Shou-Xin. Preparation of Visible Light Response Pt-doped La₂O₃/TiO₂ and Thermo-photocatalytic Degradation of Toluene[J]. Journal of Inorganic Materials, 2011, 26(11): 1175-1180.

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Preparation of Visible Light Response Pt-doped La₂O₃/TiO₂ and Thermo-photocatalytic Degradation of Toluene

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