Study On Preparation And Performance Of Highly Efficient TiO₂ Photocatalyst

This study mainly focused on the preparation of highly efficient TiO2 photocatalysis. Research contents include the preparation of nanocrystalline TiO2 by sol-gel processing followed by room temperature solvent evaporation inducement method(SGRTSE); the modification of TiO2 by precious metal, transitional and rare-earth element; and the sulfuric acid treatment to improve the photocatalytic activity. In addition, the effects of salt species in the photocatalytic degradation of DBSNa aqueous solution, the affecting factors and kinetics of photocatalytic degradation of methyl orange are investigated in the paper. The results show that perfect anatase nanocrystalline TiO2 can be obtained by SGRTSE method and the photocatalytic activity of TiO2 can be improved by doping and surface treatment. In the experimental system, the addings of proper salts are beneficial to the photocatalytic degradation of DBSNa. The pH value of solution, adding amount of TiO2, flow rate of air, and initial concentration are the main influence factors for the photocatalytic degradation of methyl orange, and the apparent reaction order is pseudo-first-order, which could be described by Langmuir- Hinshelwood equation.