Preparation and characterization of nanometer sized TiO_2 thin film sintered at low temperature

The TiO2 thin film prepared by an improved sol-gel processing and then dip-coating on a glass substrate was sintered at 150℃ for 15min.The grain size,the thickness,the surface property,and the absorbency in UV-vis spectra of the film were characterized by a surface profile and methods of X-ray diffraction,scanning electron microscopy,atomic force microscopy,X-ray photoelectron spectroscopy,UV-vis spectrophotometry and decomposition of methylene bule.The film is identified as pure anatase,the grain size is around 10-50nm and the surface of the film is even and compact,the film shows high light absorption in UV-vis spectra and has high photocatalytic decomposition rates of methylene bule.