Preparation and Photocatalytic Performances of F-Doped TiO<sub>2</sub>

Abstract

Butyl acetate titanate as precursors, no water ethanol as solvent, pure TiO2 and different doping ratio of F/TiO2 photocatalysts were prepared through sol-gel method; And F doping amount on photocatalytic activity of TiO2 influences were analysed systematically through uv-vis spectrophotometer, infrared spectrometer, etc. Experimental results show that photocatalytic activity of TiO2 is better when the mole ratio of F is between 10% and 20%; When F doping amount is 20%, catalyst amount is 25g, the photocatalytic degradation rate of F/TiO2 can reach 85.74% in10%wt methylene blue solution under 250W high-voltage mercury lamp illumination after 2 hours and the area of illumination 6.94×10-3m2. In the same way, the photocatalytic degradation rate of pure TiO2 is just 35.39 %. It proves that F/TiO2 catalyst of doping amount 20% presents the best photocatalytic activity.