Preparation of Visible Light Response Pt-doped La_2O_3/TiO_2 and Thermo-photocatalytic Degradation of Toluene

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) adsorp-tion.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 oxy-gen-adsorption.Pt loading had no influence on the phase composition of TiO2,but decreased TiO2 particle size and in-creased the surface area.Nano-Pt was uniformly dispersed on La2O3/TiO2 with diameter of 5?10 nm.Pt-La2O3/TiO2 has much more hydroxyl group than TiO2 and La2O3/TiO2.The rate of photocatalytic oxidation gaseous toluene on Pt-La2O3/TiO2 increased 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.