Method for preparing blue titanium dioxide

A titanium dioxide and blue technology is applied in the field of inorganic nano-photocatalyst materials to achieve the effects of simple method, high yield and good optical performance

Inactive Publication Date: 2014-02-05
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no stable blue TiO with high absorbance in the visible region (λ≥400nm) has been prep

Method used

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  • Method for preparing blue titanium dioxide
  • Method for preparing blue titanium dioxide
  • Method for preparing blue titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example 1

[0043] The blue titanium dioxide of this example was prepared as follows:

[0044] a. Dissolve 2.32 grams of anhydrous titanium tetrachloride in 5ml of absolute ethanol in an ice bath to prepare a 37% ethanol solution of titanium tetrachloride by mass;

[0045] b. At room temperature, add 2ml of titanium trichloride to 5ml of absolute ethanol to obtain mixed solution A, and then add 0.3g of sodium fluoride powder to mixed solution A to obtain mixed solution B. Titanium trichloride and fluoride The molar ratio of sodium powder is 2:1;

[0046] c. At room temperature, add 0.18 ml of the ethanol solution of titanium tetrachloride obtained in step a to the mixed solution B obtained in step b to obtain mixed solution C, wherein the molar ratio of titanium tetrachloride to titanium trichloride is 1: 40;

[0047] d. Put the mixed liquid C into the hydrothermal reaction kettle and put it in the oven, react at 180℃ for 12 hours to obtain a solid-liquid mixture, pour out the ...

Example Embodiment

[0056] Example 2

[0057] The blue titanium dioxide of this example was prepared as follows:

[0058] a. Dissolve 3 grams of anhydrous titanium tetrachloride in 8ml of absolute ethanol in an ice bath to prepare a titanium tetrachloride ethanol solution with a mass concentration of 32.2%;

[0059] b. At room temperature, add 10ml of titanium trichloride to 25ml of absolute ethanol to obtain mixed solution A, and then add 1.5g of sodium fluoride powder to mixed solution A to obtain mixed solution B. Titanium trichloride and fluoride The molar ratio of sodium powder is 2:1;

[0060] c. At room temperature, add 0.89ml of the ethanol solution of titanium tetrachloride obtained in step a to the mixed solution B obtained in step b to obtain mixed solution C, wherein the molar ratio of titanium tetrachloride to titanium trichloride is 1: 50;

[0061] d. Put the mixed liquid C into a hydrothermal reaction kettle and put it in an oven, and react at a temperature of 180°C for 15 hours to obtain ...

Example Embodiment

[0064] Example 3

[0065] The blue titanium dioxide of this example was prepared as follows:

[0066] a. Dissolve 4 grams of anhydrous titanium tetrachloride in 10ml of absolute ethanol in an ice bath to prepare a titanium tetrachloride ethanol solution with a mass concentration of 33.6%;

[0067] b. At room temperature, add 37.5ml of titanium trichloride to 90ml of absolute ethanol to obtain mixed solution A, and then add 6.5g of sodium fluoride powder to mixed solution A to obtain mixed solution B, titanium trichloride and fluorine The molar ratio of sodium hydroxide powder is 2:1;

[0068] c. At room temperature, add 2.5 ml of the ethanol solution of titanium tetrachloride obtained in step a to the mixed solution B obtained in step b to obtain mixed solution C, wherein the molar ratio of titanium tetrachloride to titanium trichloride is 1: 60;

[0069] d. Put the mixed liquid C into a hydrothermal reaction kettle and put it in an oven, and react at a temperature of 180°C for 15 hou...

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Abstract

The invention discloses a method for preparing blue titanium dioxide. The method is characterized in that cheap titanium trichloride is used as a raw material, balance conjugate pair titanium tetrachloride is added in a solvent thermal reaction system according to a certain molar ratio, sodium fluoride is used as a stabilizer, and blue titanium dioxide nanometer particles with high stability are synthesized by a one-step method. The method disclosed by the invention is simple, free of insert gas protection and short in period, the obtained product is good in crystallization growth, high in purity, free of agglomeration, high in yield and uniform in grain size, the product is granular, and the size of the product is 15-25 nanometers.

Description

technical field [0001] The invention belongs to the technical field of inorganic nano photocatalyst materials, and relates to a preparation method of titanium dioxide. Background technique [0002] At the end of the 20th century, countries with advanced science and technology in the world are researching building materials and coatings that purify the air, inhibit bacteria and eliminate bacteria, and fight against the deteriorating environment. In the research of related fields in various countries, titanium dioxide (TiO 2 ), commonly known as titanium dioxide, has received more and more attention, because it is the pigment with the strongest coloring power and hiding power among white pigments, and it is also a highly active photocatalyst with excellent photocatalytic performance, especially for just Harmful components in the air of the painted room, such as formaldehyde, vinyl chloride, benzene, phenols and other harmful gases, have excellent photocatalytic decomposition ...

Claims

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Application Information

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IPC IPC(8): C01G23/047B82Y40/00
Inventor 徐安武朱青
Owner UNIV OF SCI & TECH OF CHINA
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