The semiconductor TiO_(2)is the most important photocatalyst for the degradation of pollutants.Anatase TiO_(2)has a large band gap of 3.2 eV that requires powerful UV light to initiate the photocatalytic reactions.Man...The semiconductor TiO_(2)is the most important photocatalyst for the degradation of pollutants.Anatase TiO_(2)has a large band gap of 3.2 eV that requires powerful UV light to initiate the photocatalytic reactions.Many modifịcation methods such as metal ion doping,composite semiconductors and metal layer modification have been used to extend the light absorption of the catalyst to the visible light region but have little effect[1~4].Surface sensitization with dyes[5]is not practical in application as most dyes self-degrade easily.Therefore,the preparation of TiO_(2)with good wavelength response in the visible light region and high photocatalytic activity for pollutant degradation using natural sunlight is an important goal in TiO_(2)photocatalysis.展开更多
基金Supported by the Education Department of Zhejiang Province(20030625)SRF for ROCS,SEM(2003-14)the National Natural Science Foundation of China(50272059).
文摘The semiconductor TiO_(2)is the most important photocatalyst for the degradation of pollutants.Anatase TiO_(2)has a large band gap of 3.2 eV that requires powerful UV light to initiate the photocatalytic reactions.Many modifịcation methods such as metal ion doping,composite semiconductors and metal layer modification have been used to extend the light absorption of the catalyst to the visible light region but have little effect[1~4].Surface sensitization with dyes[5]is not practical in application as most dyes self-degrade easily.Therefore,the preparation of TiO_(2)with good wavelength response in the visible light region and high photocatalytic activity for pollutant degradation using natural sunlight is an important goal in TiO_(2)photocatalysis.
