CO2Reforming Performance and Visible Light Responsibility of Cr-DopedTiO2Prepared by Sol-Gel and Dip-Coating Method

[摘要] A Cr-dopedTiO2film was prepared by sol-gel and dip-coating method and used as the photocatalyst forCO2reforming under the visible light. The ratio of amount of Cr added to amount of Ti inTiO2sol solution (R) varied from 0 to 100 wt%. The total layer number of Cr-dopedTiO2film (N) coated was up to 7. TheCO2reforming performance with the Cr-dopedTiO2film was evaluated by illuminating under a Xe lamp with or without ultraviolet (UV) light. The concentration of CO which was a product fromCO2reforming was maximized forR=70 wt% whenNequals to 1. The visible light responsibility was also maximized forR=70 wt%. The amount of Cr withinTiO2film coated on copper disc was increased with the increase inRup to 70 wt% and started to decrease whenRis over 70 wt%.TheCO2reforming performance ofTiO2film with one layer Cr-doped was found better than that ofTiO2film with multi Cr-doped layers under illuminating of UV light. Under the visible light, the performance was maximized atR=70 wt% andN=7with one layer Cr-doped.

[学科分类] 工业化学