Preparation and photocatalytic properties of TiO2 film produced via spin coating

Abstract

Abstract TiO2 thin film coated onto glass was prepared by a spin coating method without being calcined at high temperature. X-ray diffraction showed that the TiO2 film consisted of a single anatase phase. Good adhesion was obtained between the film and the substrate. UV-vis spectra showed that the TiO2 film was transparent in the visible range and opaque in the ultraviolet range. The transmittance decreased and the absorption edge shifted as the layers increased. The photocatalytic performance of the TiO2 film was evaluated by degradation of methylene blue. The results indicated that the degradation of TiO2 film spun for 3 times (each time for 30 s) at a rotation speed of 2 500 revolutions per minute reached 93.3 %. The TiO2 film could be reused for more than 5 times without great decrease in photocatalytic activity.