Titanium dioxide with high-energy surface hollow structure and its preparation method

A hollow structure, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., to achieve the effect of novel structure, easy recycling, and simple method

Inactive Publication Date: 2012-05-09
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, anatase titania with both highly exposed (001) facets and hollow structure has not been reported yet.

Method used

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  • Titanium dioxide with high-energy surface hollow structure and its preparation method
  • Titanium dioxide with high-energy surface hollow structure and its preparation method
  • Titanium dioxide with high-energy surface hollow structure and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 0.1 ml of hydrofluoric acid with a concentration of about 47%, mix it with 3 ml of hydrogen peroxide solution with a concentration of about 30%; add 0.02 g of metal titanium powder to the solution obtained above, and stir for 5 minutes; deionize 27 ml Water was added to the above-mentioned stirred mixed solution, put into a polytetrafluoroethylene-lined hydrothermal reaction kettle, reacted at 160° C. for 4 hours, washed with deionized water and dried. The obtained titanium dioxide structure is anatase, the particle size is uniform, the average size is 1.5 microns, it is composed of agglomerated flake particles with high-energy surfaces, and it is a hollow structure, such as figure 1 , 2 , 3, 4 shown.

Embodiment 2

[0028] Take 0.2 ml of hydrofluoric acid with a concentration of about 47%, mix it with 6 ml of hydrogen peroxide solution with a concentration of about 30%; add 0.04 g of metal titanium powder to the solution obtained above, and stir for 5 minutes; deionize 57 ml Water was added to the above-mentioned stirred mixed solution, put into a polytetrafluoroethylene-lined hydrothermal reaction kettle, reacted at 170° C. for 15 hours, washed with deionized water and dried. The obtained titanium dioxide particles have an average size of 1 micron, are composed of agglomerated flake particles with high-energy surfaces, and have a hollow structure.

Embodiment 3

[0030] Take 0.5 ml of hydrofluoric acid with a concentration of about 47%, mix it with 15 ml of hydrogen peroxide solution with a concentration of about 30%; add 0.10 g of metal titanium powder to the solution obtained above, and stir for 5 minutes; deionize 135 ml Water was added to the above-mentioned stirred mixed solution, put into a polytetrafluoroethylene-lined hydrothermal reaction kettle, reacted at 180° C. for 20 hours, washed with deionized water and dried. The obtained titanium dioxide particles have an average size of 2 microns, are composed of agglomerated flake particles with high-energy surfaces, and have a hollow structure.

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Abstract

The invention provides titanium dioxide with a high-energy surface hollow structure, which is characterized in that metal titanium powder and hydrogen fluoride are directly reacted with an aqueous solution of hydrogen peroxide to obtain titanium dioxide which possesses the hollow structure and is formed by high-energy surface flake particle reunion with particle size of 1-3 micrometers, a preparation method comprises the following steps: mixing hydrofluoric acid and the hydrogen peroxide solution according to proportion of 1-20:30-600, adding the metal titanium powder in the mixed solution, wherein the addition is that every milliliter mixed solution adds 0.006-0.12g metal titanium powder, stirring for 5 minutes; and adding deionized water in the stirred mixed solution according to proportion of 1-20:9-180, putting into a teflon-lined hydrothermal autoclave, reacting for 4-40 hours at the temperature of 160-200 DEG C, washing by deionized water and drying. The present invention enables simple method without a templating agent or a surfactant and further treatment, and is easy to recycle and use in practical application; the invention has the advantages of novel structure, structured size and well crystallization.

Description

technical field [0001] The invention relates to a semiconductor material and a preparation method thereof, in particular to a titanium dioxide and a preparation method thereof. Background technique [0002] Titanium dioxide is a semiconductor that is non-toxic, has high catalytic activity, good chemical stability, is cheap and easy to obtain, and can directly use solar energy. Wide range of applications. [0003] The photocatalytic and photoelectric catalytic properties of titanium dioxide are mainly affected by crystal form, specific surface area, surface properties and morphology. For example, titanium dioxide with anatase structure has more excellent photocatalytic performance than titanium dioxide of other crystal forms such as rutile type and brookite type; due to the low density of titanium dioxide hollow structure and large specific surface area, it has excellent optical and electrical properties, so It has broad application prospects in the fields of catalysis, bat...

Claims

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Application Information

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IPC IPC(8): C01G23/047
Inventor 张湘义王小亮
Owner YANSHAN UNIV
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