Photocatalytic Degradation of Nanometer TiO<sub>2</sub> Sol Composed Fabric to Dye

Abstract

The TiO2 sol was prepared via sol-gel method. A new reaction system and the relevant technical route were adopted, and TiO2 colloidal sol containing nanoctrystalline anatase was prepared at low temperature, which directly had photocatalytic activity without the typical high-temperature treatment in traditional sol-gel method. The structure and property of Nanometer TiO2 were characterized by Particle Size Distribution, what is more, its effects of ratio of reactants on the catalytic proporty of nanometer TiO2 were analyzed. Nano-TiO2 sol as loaded on the surface of fabric using finishing method，thus nano-TiO2 finished fabrics were obtained and used as photocatalysts for oxidative degradation of Rhodamine B in water. Some factors affecting degradation such as the TiO2 content, dye concentration and reuse of the nano-TiO2 finished fabrics were investigated with respect to the decoloration value. The results showed that increasing molar ratio of water to n-butyl titanate led to a smaller particle size nano-TiO2 sol. Nanometer TiO2 sol composed fabrics have a very good photocatalytic activity on the degradation of dyes, and can be resued for sevral circles. Increasing TiO2 content on the fabric and decreasing the dye concentration led to higher decoloration of the dyes in solution.