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Method for preparing anatase titanium dioxide

A technology of titanium dioxide and anatase type, which is applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of large particle size and low photocatalytic activity of anatase type titanium dioxide, and achieve high photocatalytic efficiency. Catalytic activity, large surface curvature effect

Inactive Publication Date: 2017-05-24
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention at least partly solves the problems of large particle size and low photocatalytic activity of the anatase titanium dioxide prepared by the existing method, and provides a method for preparing anatase titanium dioxide sodium with small size and high photocatalytic activity.

Method used

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  • Method for preparing anatase titanium dioxide
  • Method for preparing anatase titanium dioxide
  • Method for preparing anatase titanium dioxide

Examples

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preparation example Construction

[0026] The preparation method of anatase type titanium dioxide of the present invention comprises the following steps:

[0027] S00. Optionally, titanium tetrachloride is added dropwise to water in an ice-water bath to form a titanium tetrachloride solution.

[0028] That is to say, the titanium tetrachloride solution used in the follow-up can be prepared separately. During the preparation, deionized water can be placed in a beaker, and then the beaker is placed in an ice-water bath to keep warm, and then the tetrachloride solution is added dropwise while stirring. Titanium to form a titanium tetrachloride solution of the desired concentration. Among them, the reason why an ice-water bath is used to keep warm is because titanium tetrachloride and water react violently at room temperature.

[0029] Preferably, the molar concentration of the titanium tetrachloride solution is 0.05-0.2 mol / L.

[0030] It is found through research that the molar concentration of the titanium tet...

Embodiment 1

[0059] This embodiment provides a method for preparing anatase titanium dioxide, which specifically includes the following steps:

[0060] S11. Place the beaker filled with deionized water in an ice-water bath and stir continuously, and add titanium tetrachloride dropwise to prepare a titanium tetrachloride solution with a concentration of 0.1 mol / L.

[0061]S12. Add concentrated ammonia water with a concentration of 12 mol / L to the above solution dropwise, and keep stirring until the solution is neutral and turns into a white suspension.

[0062] S13. Pour the suspension into a suction filtration device for suction filtration, and alternately wash it twice with deionized water and absolute ethanol to finally obtain an amorphous white solid of titanium dioxide.

[0063] S14. Add the above-mentioned amorphous titanium dioxide into 350 ml of deionized water, and stir for 1 hour to form a white suspension. The concentration of the amorphous titanium dioxide in the suspension is 0...

Embodiment 2

[0071] This embodiment provides a method for preparing anatase titanium dioxide, which specifically includes the following steps:

[0072] S21. Place the beaker filled with deionized water in an ice-water bath and stir continuously, and add titanium tetrachloride dropwise to prepare a titanium tetrachloride solution with a concentration of 0.05 mol / L.

[0073] S22. Add concentrated ammonia water with a concentration of 12 mol / L to the above solution dropwise, and keep stirring until the solution is neutral and turns into a white suspension.

[0074] S23. Pour the suspension into a suction filtration device for suction filtration, and alternately wash it twice with deionized water and absolute ethanol to finally obtain an amorphous white solid of titanium dioxide.

[0075] S24. Add the above-mentioned amorphous titanium dioxide into 350 ml of deionized water, and stir for 1 hour to form a white suspension. The concentration of the amorphous titanium dioxide in the suspension is...

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Abstract

The invention provides a method for preparing anatase titanium dioxide and belongs to the technical field of chemical engineering. The problems that the anatase titanium dioxide prepared by the existing method is large in particle size and low in photocatalytic activity can be partially solved at least. The method for preparing anatase titanium dioxide disclosed by the invention comprises the following steps: dripping ammonium hydroxide into titanium tetrachloride solution until the solution is neutral, so that amorphous titanium dioxide is produced in the titanium tetrachloride solution, and the solution is turned into first turbid liquid; filtering the first turbid liquid so as to obtain the amorphous titanium dioxide; dispersing the amorphous titanium dioxide in water so as to obtain second turbid liquid; dripping hydrogen peroxide into the second turbid liquid, and enabling the second turbid liquid to turn into a transparent saffron yellow solution; heating the transparent saffron yellow solution so as to obtain titanium dioxide sol; and heating the titanium dioxide sol, thereby obtaining the anatase titanium dioxide.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to an anatase type titanium dioxide. Background technique [0002] Anatase titanium dioxide (TiO 2 ) has a wide range of applications in photocatalysis and other fields, and the size of the commonly used anatase titanium dioxide is in the nanometer scale (that is, using anatase titanium dioxide nanoparticles). [0003] In the prior art, anatase-type titanium dioxide nanoparticles are mostly prepared by high-temperature calcination and other methods, but the size of anatase-type titanium dioxide nanoparticles prepared by these methods is still large, and its short-axis diameter is generally above 30nm, and its photocatalytic activity is low. . Contents of the invention [0004] The invention at least partly solves the problems of large particle size and low photocatalytic activity of the anatase titanium dioxide prepared by the existing method, and provides ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00
CPCC01G23/0536C01P2002/72C01P2004/03C01P2004/04C01P2004/64
Inventor 刘小虎李伟陈延青
Owner BOE TECH GRP CO LTD
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