Study on Structure and Preparation of Ag Doped Nanocrystaline TiO_2 Films

TiO_2 precursors are synthesized sucessfully from ethanol solution of tetrabutyl titanate and silver nitrate containing nitric acid as inhibiting agent by sol-gel method.TiO_2 powders and films with nano-crystalline have been prepared by sintering the TiO_2 precursors.The thermal behavior of the material is examined by the method of DTA-TG.The crystal type,granularity,particle size distribution of powers has been analyzed by means of XRD.The morphologies and grain sizes measurement have been carried out by SEM.The XRD and SEM results of powers and films show that TiO_2 prepared in this experiments is anatase,which is calcined at 350℃ for 1 hour the average size of TiO_2 powder with narrow distributions of granularity is above 10 nm,and thickness of TiO_2 films are even.