Effects of the Temperature of the System on Titanium Dioxide Particles by Hydrothermal Synthesis

Different morphology and size of titanium dioxide particles were hydrothermally prepared by using tetrabutyl titanate(Ti(OC4H9)4)as precursor at different temperatures. The characteristics of TiO2were studied by scanning electron microscopy and X-ray diffraction( XRD). The results showed that the crystalline phase,size of the particles and morphology of TiO2particles were greatly influenced by the temperature of the hydrothermal synthesis. With the increasing hydrothermal temperature,the grain size of titanium dioxide particle increased accordingly,the degree of crystallinity was more and more complete,while rules of the sample morphology was better. The producing titanium dioxide was presented with anatase phase structure priority,the XRD peaks became broaden,the peak intensity was weak and the grain started to develop,when hydrothermal temperature was low. The rutile crystal appeared with the increase of hydrothermal temperature,the diffraction peak was sharp,the peak intensity and the grain size increased. When the temperature rose to 160 ℃,crystal structure was mainly composed of rutile phase,with complete grain development and perfect crystallization.