Preparation of Nano-TiO2 by Dialysis Hydrolysis of TiCl4

doi:10.3724/SP.J.1077.2007.00053

Abstract

Abstract: A dialysis membrane was used to make H⁺ and Cl^- dialyze out slowly during the hydrolysis of TiCl₄, and then TiO₂ gel was obtained. The gel was dried by different methods and then calcined. The samples were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), BET surface area and BJH pore size distribution. For comparison, the hydrolysis of TiCl₄ by the methods of heating and adding ammonia, and the hydrolysis of tetrabutyl titanate by the sol-gel method were researched. The product prepared by the dialysis method has an enormous specific surface area and the crystallites are small and uniform. It has a high phase transform temperature, keeping anatase after calcination at 700℃ and transforming into rutile phase at 900℃.

Key words: gel, nanometer, TiO2, preparation

CLC Number:

TF123

CHEN Yun-Hua,LIN An,GAN Fu-Xing. Preparation of Nano-TiO₂ by Dialysis Hydrolysis of TiCl₄[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2007.00053.

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Preparation of Nano-TiO₂ by Dialysis Hydrolysis of TiCl₄

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