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A preparing method of black single brookite phase titanium dioxide

A technology of titanium dioxide and brookite, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of harsh synthesis conditions, multi-steps, limitations, etc.

Inactive Publication Date: 2015-08-12
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reported preparation methods of brookite phase titanium dioxide are high energy consumption, multi-step, harsh synthesis conditions, and expensive equipment, and these synthesis methods are difficult to obtain uniform distribution of single brookite phase titanium dioxide, making these methods in practical application subject to certain restrictions

Method used

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  • A preparing method of black single brookite phase titanium dioxide
  • A preparing method of black single brookite phase titanium dioxide
  • A preparing method of black single brookite phase titanium dioxide

Examples

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Embodiment 1

[0018] a. Dissolve 0.32g of titanium hydride in 2.5mL of deionized water, add 30mL of hydrogen peroxide with a mass fraction of 30% dropwise under constant stirring, and keep stirring the mixed reaction solution rapidly at room temperature for 12 hours to obtain a gel-like mixture;

[0019] b. Under uniform stirring, add 50 mL of deionized water to the mixture obtained in step a, adjust the pH of the mixed solution to 8 with 1.0 M sodium hydroxide solution, then add 0.4 g of sodium borohydride to obtain a transparent yellow mixed solution;

[0020] c. Place the mixed solution obtained in step b in an autoclave at a temperature of 180° C. and react for 24 hours;

[0021] d. Remove the mixed solution obtained in step c from the autoclave, wash it in 50.0mL of 1.0M hydrochloric acid solution for 10h, and then centrifuge to obtain the precipitate, wash it twice with absolute ethanol, wash it three times with deionized water, and place it in Dry in a vacuum freeze-drying oven for 1...

Embodiment 2

[0024] a. Dissolve 0.32g of titanium hydride in 2.5mL of deionized water, add 30mL of hydrogen peroxide with a mass fraction of 30% dropwise under constant stirring, and keep stirring the mixed reaction solution rapidly at room temperature for 12 hours to obtain a gel-like mixture;

[0025] b. Under uniform stirring, add 50 mL of deionized water to the mixture obtained in step a, adjust the pH of the mixed solution to 9 with 1.0 M sodium hydroxide solution, then add 0.4 g of sodium borohydride to obtain a transparent yellow mixed solution;

[0026] c. Place the mixed solution obtained in step b in an autoclave at a temperature of 180° C. and react for 24 hours;

[0027] d. Remove the mixed solution obtained in step c from the autoclave, wash it in 50.0mL of 1.0M hydrochloric acid solution for 10h, and then centrifuge to obtain the precipitate, wash it twice with absolute ethanol, wash it three times with deionized water, and place it in Dry in a vacuum freeze-drying oven for 1...

Embodiment 3

[0030] a. Dissolve 0.32g of titanium hydride in 2.5mL of deionized water, add 30mL of hydrogen peroxide with a mass fraction of 30% dropwise under constant stirring, and keep stirring the mixed reaction solution rapidly at room temperature for 12 hours to obtain a gel-like mixture;

[0031] b. Under uniform stirring, add 50 mL of deionized water to the mixture obtained in step a, adjust the pH of the mixed solution to 10 with 1.0 M sodium hydroxide solution, then add 0.4 g of sodium borohydride to obtain a transparent yellow mixed solution;

[0032] c. Place the mixed solution obtained in step b in an autoclave at a temperature of 180° C. and react for 24 hours;

[0033] d. Remove the mixed solution obtained in step c from the autoclave, wash it in 50.0mL of 1.0M hydrochloric acid solution for 10h, and then centrifuge to obtain the precipitate, wash it twice with absolute ethanol, wash it three times with deionized water, and place it in Dry in a vacuum freeze-drying oven for ...

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Abstract

The invention relates to a preparing method of black single brookite phase titanium dioxide. Based on principles of forming microcrystalline by hydrothermal reactions, a hydrothermal reaction by adopting a gellike titanium source is performed to form microcrystalline, and a calcination step is performed to obtain the black single brookite phase titanium dioxide containing titanous defects. Compared with traditional preparing methods of brookite phase titanium dioxide, the brookite phase titanium dioxide prepared by the method is single in titanium dioxide crystal phase, uniform in particle size distribution and near in crystal grain shapes, and the introduction of the titanous defects endows materials with excellent visible light photocatalytic performance. The hydrothermal preparing method has advantages of single raw material, simple operation, mild conditions, simple process, high crystal phase purity, high concentration of the titanous defects, high visible light absorbance, and the like. The efficiency of the prepared black single brookite phase titanium dioxide microcrystalline in degradation of industrial pollutant organic dyestuff methylene blue under visible light is superior to that of P25. The prepared black single brookite phase titanium dioxide microcrystalline has a wide application prospect in field of industrial wastewater treatment with inorganic catalysts, and other fields.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic nano material preparation, and in particular relates to a preparation method and application of black single brookite phase titanium dioxide. Background technique [0002] Titanium dioxide is the most promising semiconductor material in the development of solar-driven clean energy and environmental protection technologies. Titanium dioxide is a polymorphic compound. There are three crystal forms of rutile, anatase and brookite in nature. Both anatase and brookite are metastable phases and can be converted into stable rutile phases after roasting. . Since it is difficult to prepare single-phase brookite titanium dioxide by artificial synthesis, the performance of brookite titanium dioxide needs to be further explored. The arrangement and linkage of titanium and oxygen atoms octahedron in brookite titanium dioxide make it have exposed oxygen atoms on the (100) crystal plane, which enables i...

Claims

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Application Information

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IPC IPC(8): C01G23/08B01J21/06
Inventor 王传义辛晓烨王兰
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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