Visible Light Absorption Ability and Photocatalytic Oxidation Activity of Co-Doped TiO2 on Active Carbon for Degradation of Toluene

摘要

N, Zn, Fe-doped TiO2 was developed to enable photocatalytic reactions using the visible range of the solar spectrum. This work reports on the synthesis, characteristic and kinetic study of interstitial N, Zn, Fe-doped TiO2 on active carbon prepared by the sol-gel method using urea, zinc nitrate and iron nitrate as N, Zn, Fe-dopants, respectively. X-ray diffraction, fourier transform infrared spectroscopy and UV-visible spectroscopy were used to analyze the titania. Different factors affecting catalyst activity were also discussed. The results show that the photocatalyst has an average diameter of 16 nm and under optimum conditions where the mol ratio of N, Fe. Zn and TiO2 were 0.4:0.1: 0.005:1 and calcination time was 2 hat 773 K. The degradation rate of toluene on photocatalyst doped with N, Zn, Fe was up to 98 % under irradiation of visible light. And degradation rate accords with first order and its L-H value is also obtained.