Ambient-temperature preparation of TiO2 films with stable visible-light photocatalytic activity

作者：Shen Qian Hong; Yang Hui^*; Gao Ji Wei

来源：Chinese Journal of Inorganic Chemistry, 2007, 23(10): 1758-1762.

• titania
• mischerystal
• sensitization
• copper(II) phthalocyanine tetrasulfonic acid
• visible light
• photocatalysis

By means of sol-gel method, TiO2 Sol containing anatase-rutile-brookite mischcrystal grains was synthesized through the hydrolyzation of butyl titanate. Copper(II)) phthalocyanine tetrasulfonic acid (CuPcTs) was added into TiO2 sol, and plithalocyanine sensitized TiO2 sol with visible-light response was prepared after heating in the water bath. Sensitized mischerystal TiO2 film (CuTsPc-TiO2) was obtained from the as-prepared sol by a dipcoating technique at room temperature. The preparation condition of the sensitized sol and the properties of CuTsPc-TiO2 film were investigated, and the loading mechanism of CuTsPc was also discussed. The results show that prolonging the time in water bath or raising the CuPcTs concentration in TiO2 sol are helpful for increasing the amount of CuPcTs supported in the film. The visible-light photocatalytic activity of the film is increased with the amount of CuPcTs, but too much CuPcTs will decrease the photocatalytic activity of the catalyst. CuPcTs can be loaded in the film uniformly and firmly via adsorption on the TiO2 colloidal particles due to electrostatic attraction, and this ensures the stability for repeated use of CuTsPc-TiO2 films.

• 出版日期2007-10
• 单位浙江大学