Method for preparing mesoporous titanium dioxide powder body

A mesoporous titanium dioxide and system technology, applied in titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problem of changing the catalytic performance and photocatalytic performance of mesoporous titanium dioxide powder, affecting the popularization and application of titanium dioxide powder, carbon dioxide and other problems such as impurity residues, etc., to achieve the effect of easy scale-up experiments, low cost, and small impurity content

Inactive Publication Date: 2010-05-19
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of these substances, on the one hand, increases the production cost of the product, and at the same time, due to the certain toxicity of organic reagents, it brings some problems to environmental protection and sustainable development; on the other hand, these organic substances must be removed in the subsequent treatment process. mesoporous structure
In the subsequent treatment process, it is easy to cause the residue of impurities such as carbon
These residual impurities will change the catalytic performance and photocatalytic performance of mesoporous titanium dioxide powder, thus affecting the popularization and application of titanium dioxide powder in catalysis and environmental protection

Method used

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  • Method for preparing mesoporous titanium dioxide powder body
  • Method for preparing mesoporous titanium dioxide powder body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Fix a three-neck bottle with a capacity of 500mL in an ice-water bath, take pure water (H 2 (2) 200mL is packed in the there-necked bottle; A condenser is installed on the middle port of the there-necked bottle, and utilizes tap water to condense; A junction thermometer is installed on a mouth of the there-necked bottle, to monitor and control the temperature of the reaction system; Take TiCl 4 Put 100mL into a dry constant-pressure separating funnel, and install the constant-pressure separating funnel on the other side port of the three-necked flask; under the condition of magnetic stirring and ice-water bath cooling, turn on the switch of the constant-pressure separating funnel, The titanium chloride solution is slowly dropped into pure water, and the temperature of the entire dropping and mixing process is controlled at about 20°C by controlling the dropping speed and the temperature of the ice-water bath; with the addition of titanium tetrachloride, the color of ...

Embodiment 2

[0031] (1) adopt the device described in step (1) in embodiment 1, get pure water (H 2 (2) 300mL is packed into there-necked bottle; Get TiCl 4 Put 100mL into a dry constant-pressure separating funnel; under the conditions of magnetic stirring and ice-water bath cooling, turn on the switch of the constant-pressure separating funnel, slowly drop the titanium tetrachloride solution into pure water, and control the dropping speed and The temperature of the ice-water bath keeps the temperature of the entire dropping and mixing process at about 5°C; after the addition of titanium tetrachloride is completed, continue to stir for 2 hours. At this time, the mixed system is a light yellow-green sol. Cool it to room temperature and place it ;

[0032](2) adopt the device described in step (2) in embodiment 1, after titanium tetrachloride aqueous sol is placed 50 hours, get 100mL above-mentioned sol and pack in the there-necked bottle of 500mL; Take H 2 Put 0300mL into a dry constant-p...

Embodiment 3

[0036] (1) adopt the device described in step (1) in embodiment 1, get pure water (H 2 (2) 100mL is packed into there-necked bottle; Get TiCl 4 Put 100mL into a dry constant-pressure separating funnel; under the conditions of magnetic stirring and ice-water bath cooling, turn on the switch of the constant-pressure separating funnel, slowly drop the titanium tetrachloride solution into pure water, and control the dropping speed and The temperature of the ice-water bath keeps the temperature of the entire dropping and mixing process at about 30°C; after the titanium tetrachloride is added dropwise, continue stirring for another 2 hours. At this time, the mixed system is a light yellow-green sol. Cool it to room temperature and place it ;

[0037] (2) Adopt the device and equipment described in step (2) in Example 1, place the titanium tetrachloride aqueous sol after 30 hours, get the above-mentioned sol of 100mL and pack in the there-necked bottle of 500mL; Take H 2 Put 0350mL...

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Abstract

The invention relates to a preparation method of titanium dioxide powder with mesoporous structure. The method is that: titanium tetrachloride is adopted as raw material, and is added with pure waterto prepare aquasol according to the volume ratio 1:1- 4 of titanium tetrachloride to pure water; the obtained material is stood for 0.5hour-15days; then the obtained material is added with pure waterto dilute according to the volume ratio 1:1- 4 of aquasol to pure water, added with ammonia sulfate, the amount of which is 0.5- 4 times that of tianium tetrachloride, heated to 50-70 DEG C, stirred under the condition of heat- preservation for 0.5-3 hours, heated to 90-100 DEG C, stirred, counter flowed and heat-preserved for 0.5-4 hours; then the titanium dioxide powder with mesoporous structureis finally made after filtering, washing and drying processes. The invention has the advantages that: 1. In the titanium dioxide powder with mesoporous structure, the surface plutonium takes up highratio; 2. only inorganic salt is adopted as precursor, using no organic titanium salt; 3. products contains little impurities with high purity and good performance; 4. the method of the invention hashigh yield and low cost, is easy to be controlled and convenient for scaling up test, has low requirement for equipment and is applied to industrialized production.

Description

(1) Technical field [0001] The invention relates to a preparation method of mesoporous titanium dioxide powder. (2) Background technology [0002] Since the preparation of porous titanium dioxide powder was reported in 1995, due to its wide range of uses, it can be used not only as a filler for composite materials with low dielectric constant and low specific gravity, but also as a carrier for slow-release microcapsule systems and drug delivery. In the field of catalysis, catalysts can also be filled into pores to improve catalytic performance. Therefore, its preparation has attracted extensive attention. At present, there have been many reports on the preparation methods of porous titanium dioxide powder in domestic and foreign literature, but these methods are all based on the template method, that is, propylene glycol, isopropanol, ethylene glycol oxalate and organic copolymerization The porous structure can only be formed by removing the above-mentioned template by cal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B01J21/06
Inventor 李国华
Owner ZHEJIANG UNIV OF TECH
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