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Preparation method of titanium dioxide nano particles

A technology of titanium dioxide and nanoparticles, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of complex preparation process and difficulty in preparing porous titanium dioxide nanoparticles with particle size, and achieve good dispersion and stability.

Inactive Publication Date: 2016-02-03
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many methods for preparing nano titanium dioxide particles, such as precipitation method, microemulsion method, hydrolysis method, spray pyrolysis method, etc., but the preparation process is relatively complicated, or it is difficult to prepare porous titanium dioxide nano particles with controllable particle size. particle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method of titanium dioxide nanoparticles, which adopts the following steps:

[0019] A) Dissolve 0.8~1.2mmol methylamine and 100mmol ultrapure water in 160~200ml organic solvent W at room temperature 1 , stir rapidly for 3~7min to obtain mixed solution A; the conductivity of the ultrapure water is 16.8MΩ·cm -1 ; The organic solvent W 1 It is a mixed solvent, its composition is: 100ml absolute ethanol, 80ml acetonitrile;

[0020] B) At room temperature, disperse 4~8mmol of isopropyl titanate in 10~40ml of absolute ethanol, and stir for 8~12min to obtain the mixed solution B;

[0021] C) Add mixed solution B to mixed solution A, and then heat the above mixed solution in a water bath while stirring slowly for about 6 hours at a temperature of 20°C; the dropping rate of mixed solution B is 8ml / min.

[0022] D) After the above heating and stirring treatment, centrifuge to obtain titanium dioxide gel solution, hydrothermally react the gel solution at 200°C fo...

Embodiment 2

[0024] A preparation method of titanium dioxide nanoparticles, which adopts the following steps:

[0025] A) Dissolve 0.8~1.2mmol dimethylamine and 120mmol ultrapure water in 160~200ml organic solvent W at room temperature 1 , stir rapidly for 3~7min to obtain mixed solution A; the conductivity of the ultrapure water is 16.8MΩ·cm -1 ; The organic solvent W 1 It is a mixed solvent, its composition is: 100ml absolute ethanol, 80ml acetonitrile;

[0026] B) At room temperature, disperse 4~8mmol of isopropyl titanate in 10~40ml of absolute ethanol, and stir for 8~12min to obtain the mixed solution B;

[0027] C) Add mixed solution B to mixed solution A, and then heat the above mixed solution in a water bath while stirring slowly for about 8 hours at a temperature of 30°C; the dropping rate of mixed solution B is 10ml / min.

[0028] D) After the above heating and stirring treatment, centrifuge to obtain titanium dioxide gel solution, hydrothermally react the gel solution at 230°C...

Embodiment 3

[0030] A preparation method of titanium dioxide nanoparticles, which adopts the following steps:

[0031] A) Dissolve 0.8~1.2mmol pyridine and 140mmol ultrapure water in 160~200ml organic solvent W at room temperature 1 , stir rapidly for 3~7min to obtain mixed solution A; the conductivity of the ultrapure water is 16.8MΩ·cm -1 ; The organic solvent W 1 It is a mixed solvent, its composition is: 100ml absolute ethanol, 80ml acetonitrile;

[0032] B) At room temperature, disperse 4~8mmol of isopropyl titanate in 10~40ml of absolute ethanol, and stir for 8~12min to obtain the mixed solution B;

[0033] C) Add mixed solution B to mixed solution A, then heat the above mixed solution in a water bath while stirring slowly for about 10 hours at a temperature of 30°C; the dropping rate of mixed solution B is 12ml / min.

[0034] D) After the above heating and stirring treatment, centrifuge to obtain titanium dioxide gel solution, hydrothermally react the gel solution at 200°C for 6 h...

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Abstract

The invention discloses a preparation method of titanium dioxide nano particles. The method comprises the specific steps that 1, at indoor temperature, a 0.8-1.2 mmol catalyst and 100-140 mmol ultrapure water are dissolved in a 160-200 ml organic solvent W1, and rapid stirring is carried out to obtain a mixed solution A; 2 at indoor temperature, 4-8 mmol titanium isopropoxide is dispersed in a 10-40 ml organic solvent W2, and stirring is carried out for 8-12 min to obtain a mixed solution B; 3, the mixed solution B is added into the mixed solution A, then the mixed solution is heated in a water bath and slowly stirred at the same time for about 6-10 h at the temperature of 20-30 DEG C; 4, centrifugation is carried out after heating and stirring to obtain a titanium dioxide gel-forming solution, the gel-forming solution is subjected to a hydrothermal reaction for 4-6 h at the temperature of 200-260 DEG C, after the reaction, the gel-forming solution is centrifuged, washed with absolute ethyl alcohol and dried at 100 DEG C for 16-24 h to obtain the titanium dioxide nano particles. By the adoption of the method, the porous titanium dioxide nano particles with the controllable particle diameter, good degree of sphericity and good dispersion stability can be obtained.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide nanoparticles. Background technique [0002] Titanium dioxide is an inorganic functional semiconductor material. Compared with conventional materials, nano-scale titanium dioxide has its unique properties: large specific surface area, strong magnetism, strong ability to absorb ultraviolet rays, high surface activity, good thermal conductivity, dispersion Good performance, stable suspension, etc. Nano-scale titanium dioxide has a wide range of uses in the fields of ultraviolet absorbers, cosmetics, advanced paints, advanced coatings, photosensitive catalysts, catalyst carriers, adsorbents, semiconductor materials, gas-sensitive sensor devices, and functional ceramic materials. [0003] At present, there are many methods for preparing nano titanium dioxide particles, such as precipitation method, microemulsion method, hydrolysis method, spray pyrolysis method, etc., but the preparation pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 杨丽萍彭志勤王秉万军民胡智文
Owner ZHEJIANG SCI-TECH UNIV