Preparation method of litchi-like hierarchical-structure {001}-surface-exposed TiO2 powder

A hierarchical structure, lychee technology, applied in the field of photocatalysis, can solve problems such as restricted use, and achieve the effects of easy control, easy implementation and low price

Inactive Publication Date: 2016-05-25
TIANJIN CHENGJIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

but F - The pollution of ions to the environment limits the use of this method

Method used

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  • Preparation method of litchi-like hierarchical-structure {001}-surface-exposed TiO2 powder
  • Preparation method of litchi-like hierarchical-structure {001}-surface-exposed TiO2 powder
  • Preparation method of litchi-like hierarchical-structure {001}-surface-exposed TiO2 powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 1.58 grams of potassium titanium oxalate, add 30 ml of deionized water, slightly heat and stir for 15 min, and prepare a potassium titanium oxalate solution with a concentration of 0.15 mol / L. Continue to stir after dissolving, add 30ml of 30% hydrogen peroxide while stirring, and stir at room temperature for 30min. After the above steps are completed, put the solution into an airtight container and let it stand for 10 h. Add 37% concentrated hydrochloric acid to it while stirring after 10 hours, transfer it to a reaction kettle containing a polytetrafluoroethylene liner after stirring for 5 minutes, and carry out hydrothermal reaction for 12 hours, and the hydrothermal temperature is 120°C ～ 150°C. After the completion of the hydrothermal reaction, cool to room temperature and wash the precipitate 5 times with deionized water until the pH is neutral, and then wash 5 times with absolute ethanol. Place it in an oven for drying at a temperature of 80°C±5°C, and fin...

Embodiment 2

[0033] Potassium titanium oxalate solution was prepared with deionized water, slightly heated and stirred for 15mim, and potassium titanium oxalate solution was prepared with a concentration of 0.10mol. Continue to stir after dissolving, add 30ml of 30% hydrogen peroxide while stirring, and stir at room temperature for 30min. After the above steps are completed, put the solution into an airtight container and let it stand for 10 h. Add 37% concentrated hydrochloric acid to it while stirring after 10 hours, transfer it to a reaction kettle containing a polytetrafluoroethylene liner after stirring for 5 minutes, and carry out hydrothermal reaction for 12 hours, and the hydrothermal temperature is 120°C ～ 150°C. After the completion of the hydrothermal reaction, cool to room temperature and wash the precipitate 5 times with deionized water until the pH is neutral, and then wash 5 times with absolute ethanol. Place it in an oven for drying at a temperature of 80°C±5°C, and final...

Embodiment 3

[0035] Potassium titanium oxalate solution was prepared with deionized water, slightly heated and stirred for 15mim, and potassium titanium oxalate solution was prepared with a concentration of 0.25mol. Continue to stir after dissolving, add 30ml of 30% hydrogen peroxide while stirring, and stir at room temperature for 30min. After the above steps are completed, put the solution into an airtight container and let it stand for 10 h. Add 37% concentrated hydrochloric acid to it while stirring after 10 hours, transfer it to a reaction kettle containing a polytetrafluoroethylene liner after stirring for 5 minutes, and carry out hydrothermal reaction for 12 hours, and the hydrothermal temperature is 120°C ～ 150°C. After the completion of the hydrothermal reaction, cool to room temperature and wash the precipitate 5 times with deionized water until the pH is neutral, and then wash 5 times with absolute ethanol. Place it in an oven for drying at a temperature of 80°C±5°C, and final...

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Abstract

The invention belongs to the technical field of photocatalysis, and particularly relates to a preparation method of litchi-like hierarchical-structure {001}-surface-exposed TiO2 powder. The method comprises the following steps: by using titanium potassium oxalate (K2TiO(C2O4)2) as a titanium source and deionized water as a solvent, preparing a titanium potassium oxalate solution; adding hydrogen peroxide (H2O2), stirring, and standing for some time; finally, adding a control agent concentrated hydrochloric acid, stirring for some time, transferring into a reaction kettle, and carrying out hydrothermal reaction at a certain temperature; and washing the obtained product with deionized water and anhydrous ethanol, and drying to obtain the litchi-like hierarchical-structure {001}-surface-exposed TiO2 powder material with high photocatalytic activity.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and specifically relates to a TiO exposed on the {001} surface of a lychee-like hierarchical structure 2 Powder preparation method. Background technique [0002] With the development of science and technology and the general improvement of people's living standards, a series of environmental problems such as smog weather in major cities in my country, water and indoor air pollution, and global warming have brought a great impact on human daily life. Therefore, more and more researchers have begun to devote themselves to seeking new and convenient methods of pollution control. Photocatalytic technology came into being based on this. [0003] Semiconductor materials with photocatalytic activity can degrade many harmful organic substances by using solar energy, and can act on water bodies, air, and building surfaces, and can effectively improve environmental pollution problems to a certain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
CPCC01G23/053C01P2002/72C01P2004/03
Inventor 鄂磊崔津周彩楼赵丹赵巍李薇
Owner TIANJIN CHENGJIAN UNIV
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