The influence of pH to prepare TiO_2 by sol-gel and the characteristics

During the progress of preparation nanocrystalline TiO 2 by sol gel, a few parameters influence the characters of nanocrystalline TiO 2. By controlling hydrolysis pH, we can get different particle diameter and phase nanocrystalline TiO 2 powders. In this paper, we primarily discuss the condition of the transformation from anatase phase to rutile phase and the trend of D hkl with pH. The X ray diffraction analysis results show that the transformation from anatase phase to rutile phase of nanocrystalline TiO 2 is connecting with the hydrolysis pH. The morphology, size, composition of TiO 2 were studied by means of TEM and XRD.