Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (03): 365-368.doi: 10.3866/PKU.WHXB20060322

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Synthesis and Characterization of Monodisperse TiO2 Colloid Particles

WANG Peng; CHEN Dong; LIU Jian-Shu; TANG Fang-Qiong   

  1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2005-08-08 Revised:2005-10-08 Published:2006-03-10
  • Contact: TANG Fang-Qiong

Abstract: The monodisperse spherical particles of TiO2 were prepared by sol-gel process in mixed solvents at low temperature. The TEM, SEM, and size distribution analysis showed that the size variation of as-synthesized spherical TiO2 colloidal particles is within 5% and the polyindex is 0.013. The thermal analysis clearly demonstrated that as-synthesized particles were hydrous amorphous TiO2. The structure of the TiO2 colloids after annealed at different temperatures were determined by XRD. The results showed that the phase transition from amorphous to anatase occurred at a temperature around 600 ℃ and both rutile and anatase appeared at 900 ℃.

Key words: TiO2, Monodisperse, Mixed solvents, Low temperature