Preparation of high pure gold redrock nano-titanium dioxide

Abstract

The invention discloses a preparation method for composing the high pure gold redrock nano-titanium dioxide by employing titanium tetrachloride and metal titanium alkoxide salt or a mixture thereof as materials by one step. The invention is characterized in that the product is single redrock nano-titanium dioxide with iron content less than 10ppm and controllable iron content of 3 to 5ppm; the grain diameter of the product after being treated at 700 DEG C is large, but smaller than 50nm; the dispersivity is good when the diameter is of 20 to 30nm; the effective content of treatment under 900 DEG C is more than 99.9 percent, and can achieve 99.99 to 99.999 percent(calculated by metal impurity content); the product can be used as a target material and a high shielding ultraviolet ray absorbent, and has excellent optical performances on infrared rays. The invention is broadly applied to liquid crystal material manufacture, the production of spaceflight and navigation coatings and precision sensor piece, cosmetics, high-grade vehicle dope manufacture, and the like.

Description

technical field [0001] The invention relates to the preparation of high-purity rutile nano-titanium dioxide synthesized by one-step method, whose iron content is less than 10ppm, which can be controlled at 3-5ppm, or even lower than 3ppm, and belongs to the field of fine chemical new functional material manufacturing. Background technique [0002] Since many high-tech fields have very strict requirements on the impurity content of nano-rutile titanium dioxide, especially iron impurities, especially in the fields of liquid crystal material preparation, precision sensors, aerospace, aerospace coatings, etc., thus putting forward very high requirements for the preparation of high-purity rutile nanomaterials, Due to the large specific surface area of ​​nanomaterials, the electrostatic adsorption of metal ions on the surface of nanoparticles is very strong. Usually, high-temperature gas-phase methods and liquid-phase methods are not well resolved. Although there are many reports i...

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Problems solved by technology

[0002] Since many high-tech fields have very strict requirements on the impurity content of nano-rutile titanium dioxide, especially iron impurities, especially in the fields of liquid crystal material preparation, precision sensors, aerospace, aerospace coatings, etc., thus putting forward very high requirements for the preparation of high-purity rutile nanomaterials, Due to the large specific surface area of ​​nanomaterials, the electrostatic adsorption of metal ions on the surface of nanoparticles is very strong. Usually, high-temperature gas-phase methods and liquid-phase methods are not well resolved. Although there are many reports in the literature on liquid-phase synthesis of rutile nano-titanium oxide, see Patent Publication Nos. 00119033.4A and 1530327A basically prepare sol or sol-gel first, or introduce seed crystals and prepare solutions at low temperature. The crystallization temperature is low and the reaction time is long. Metal impurities are co-precipitated by adding alkali and other methods, which cannot be removed. The metal impurities in the system, especially the impurity components of iron ions, the existing technology cannot well overcome the electrostatic adsorption of metal ions on the surface of nanocrystals and cannot fully wash away the iron ions in the solution, so it is difficult to prepare iron ion content less than 10ppm , and can be controlled to 3-5ppm, or even less than 3ppm, high-purity rutile nano-titanium dioxide high-quality material

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