Method for preparing rutile titanium dioxide

Abstract

The invention relates to a method for preparing rutile titanium dioxide. The method comprises the following steps of: (a) adding titanium tetrachloride or titanium trichloride into a reaction kettle with a polar solvent with stirring to obtain a mixed solution A, sealing the reaction kettle, heating to 50 to 75 DEG C, preserving heat, and reacting for 6 to 24 hours to obtain a reaction solution; and (b) performing solid-liquid separation on the reaction solution obtained in the step (a), recycling liquid, and washing and drying a solid to obtain the rutile titanium dioxide. The pure rutile titanium dioxide is prepared by directly hydrolyzing the titanium tetrachloride or the titanium trichloride in the polar solvent, so that the process is simple; inorganic acid, a crystal form control agent, a chelating agent or a surfactant is not required to be added into a reaction system, so that cost is reduced; and the method is suitable for large-scale industrial production.

Description

technical field

[0001] The invention relates to a preparation method of rutile titanium dioxide, which belongs to the technical field of preparation of inorganic non-metallic materials. Background technique

[0002] Titanium dioxide (TiO 2 ) has the characteristics of high catalytic activity, chemical stability, non-toxicity, low cost and easy availability, and has been widely researched and applied in the fields of photocatalysis, photoelectrochemistry, solar cells, gas sensing, medical treatment and pigments. Titanium dioxide is a polymorphic compound, and three types of anatase, brookite and rutile are more common in nature (see L.Kavan, M.Gratzel, S.E.Gilbert, C . Klemenz, H.J. Scheel, J.Am.Chem.Soc., 1996, 118:6716–6723.). According to the calorimetric measurement results, the thermodynamic stability order of the three crystal forms of titanium dioxide is: rutile> brookite> anatase (see T.Mitsuhashi, O.J.Kleppa, J.Am.Ceram.Soc., 1979, 62:356–357.). Three diffe...

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