关键词: 可见光响应, 超亲水性, TiO2薄膜, 改性, 可见光响应, 超亲水性, TiO2薄膜, 改性

Abstract: The mechanisms of TiO2 films superhydrophlicity are introduced. The methods for realizing visible-light-driven superhydrophilicity of TiO2 thin film，including constructing rough films，precious metal deposition，ion doping，surface sensitization，semiconductor coupling ，TiO2/SiO2 compositing and multiple modifications are discussed. In addition，the existing problems of superhydrophilic TiO2 are addressed，such as complicated preparation technology，rigid modification conditions and short time of superhydrophilicity. Using the sol-gel method and combining multiple modifications are effective methods to resolve these problems in the future.

Key words: visible-light- driven, superhydrophilicity, TiO2 thin films, modification methods, visible-light- driven, superhydrophilicity, TiO2 thin films, modification methods