Preparation of doped nanocrystalline TiO(2) and microstructural control by stearic acid sol-gel method

Nanocrystalline TiO2 powders doped with Na+ and K+ were prepared by stearic acid sol-gel method. The resulting nanocrystallines were characterized by FTIR, XRD and TEM. The reaction mechanism was also studied. The experimental results showed that rutile TiO2 can be obtained at 500℃ by using stearic acid sol-gel method, while anatase TiO2 were obtained from doping with Na+ and K+. As a result of doping, the crystalline size decreased with increasing the amount of dopants.