Preparation of nanocrystal anastase TiO_2 by hydrothemeral method

Nanocrystal anatase TiO2 was prepared from Ti(OH)4·TEA sol which was prepared from TiCl4 reacted with NaOH, then be dispersed by triethanolamine (TEA) and aged for 4.5h at 100℃. Thus 10.4g TiCl4 was dropped into ethanol which containing 10.0g NaOH and 7.5g TEA during stirring at room temperature. After centrifugation, the solution containing Ti(OH)4·TEA was dropped into deioned water at 60℃ and the white precipitation was aged for 4.5h to 7.0h at 100℃. The XRD, FTIR, TEM was used to investigate the formatting size, morphology and crystalline of the particles. Results showed that the average partied size was in the range of 8.7nm to 18.7nm.