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2005•Chinese Journal of Applied ChemistryRequires access

Photocatalytic Reaction of Methane with Water over (MoO_3,ZnO)-TiO_2/SiO_2

Sang Li

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Abstract

Supported loaded semiconductors (MoO_3,ZnO)-TiO_2/SiO_2 were pre pared by an isovolumetric impregnation method from TiO_2/SiO_2 pre pared by chemical modification reaction. The chemisorption property and photon a bsorption ability of MoO_3-TiO_2/SiO_2 and ZnO-TiO_2/SiO_ 2 were investigated by BET, UV-Vis DRS, IR and TPD-MS techniques. The gas -phase photocatalytic reaction of CH_4 with H_2O was performed at 150 ℃ in a fixed-bed annular reactor. The results show that the conversion of met hane and the selectivity of methanol reach to 5.1% and 87.3% respectively over MoO_3-TiO_2/SiO_2, and MoO_3-TiO_2/SiO_2 ex hibits higher photocatalytic acivity than ZnO-TiO_2/SiO_2.

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What this paper is about

Supported loaded semiconductors (MoO_3,ZnO)-TiO_2/SiO_2 were pre pared by an isovolumetric impregnation method from TiO_2/SiO_2 pre pared by chemical modification reaction. The chemisorption property and photon a bsorption ability of MoO_3-TiO_2/SiO_2 and ZnO-TiO_2/SiO_ 2 were investigated by BET, UV-Vis DRS, IR and TPD-MS techniques. The gas -phase photocatalytic reaction of CH_4 with H_2O was performed at 150 ℃ in a fixed-bed annular reactor. The results show that the conversion of met hane and the selectivity of methanol reach to 5.1% and 87.3% respectively over MoO_3-TiO_2/SiO_2, and MoO_3-TiO_2/SiO_2 ex hibits higher photocatalytic acivity than ZnO-TiO_2/SiO_2.

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Available abstract

Supported loaded semiconductors (MoO_3,ZnO)-TiO_2/SiO_2 were pre pared by an isovolumetric impregnation method from TiO_2/SiO_2 pre pared by chemical modification reaction. The chemisorption property and photon a bsorption ability of MoO_3-TiO_2/SiO_2 and ZnO-TiO_2/SiO_ 2 were investigated by BET, UV-Vis DRS, IR and TPD-MS techniques. The gas -phase photocatalytic reaction of CH_4 with H_2O was performed at 150 ℃ in a fixed-bed annular reactor. The results show that the conversion of met hane and the selectivity of methanol reach to 5.1% and 87.3% respectively over MoO_3-TiO_2/SiO_2, and MoO_3-TiO_2/SiO_2 ex hibits higher photocatalytic acivity than ZnO-TiO_2/SiO_2.

Key concepts: Photocatalysis, Chemistry, Chemisorption, Methanol, Methane, Selectivity, Catalysis, Chemical engineering

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