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Foamed aluminum carried titanium dioxide catalyst, its preparation method and uses

A technology of titanium dioxide and aluminum foam, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of inability to decompose organic compounds, little adsorption capacity, harmful to human body, etc., and achieve reliable preparation methods , Simple recycling and convenient source

Inactive Publication Date: 2008-11-26
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Air purifiers based on the principle of activated carbon adsorption are commonly used in the prior art. However, such purifiers can only effectively adsorb pollutants such as dust and suspended particles, and have little adsorption capacity for chemical organic substances such as formaldehyde and other pollutants. Can not decompose this type of organic compound
Ozone generators are also used to remove pollutants such as formaldehyde by oxidation, but the ozone used is itself a harmful substance to the human body.

Method used

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  • Foamed aluminum carried titanium dioxide catalyst, its preparation method and uses
  • Foamed aluminum carried titanium dioxide catalyst, its preparation method and uses
  • Foamed aluminum carried titanium dioxide catalyst, its preparation method and uses

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preparation example Construction

[0036] About the preparation of catalyst, be to carry out as follows:

[0037] a. Preparation of nano-TiO 2 Dispersion solution, or doped nano TiO 2 dispersion solution, or TiO 2 Colloidal solution, or doped TiO 2 Colloidal solution;

[0038] b. Select a foamed aluminum matrix, the porosity of the foamed aluminum matrix is ​​10%-95%, and the pore diameter is 10nm-5mm;

[0039] c. Using the solution soaking method, soak the foamed aluminum in the dispersion solution or colloid solution described in step a, take it out after 1 hour, and dry it naturally in the air to obtain nano-TiO 2 , or doped nano-TiO 2 , or TiO 2 colloid, or doped TiO 2 Colloidal aluminum foam;

[0040] D, aftertreatment, the loaded nano-TiO that step c makes 2 , or doped nano-TiO 2 , or TiO 2 colloid, or doped TiO 2 The colloidal aluminum foam is annealed at 100-1000°C for 1-2 hours under the protection of inert gas.

[0041] About the application of the catalyst in the present embodiment in the ...

example 1

[0050] Example 1: TiO 2 Preparation of nanoparticles:

[0051] Take 20ml of tetrabutyl titanate and dissolve it in ethanol solvent; add a few drops of hydrochloric acid after mixing 30mL of distilled water and 30ml of ethanol to make the pH value 1-5, and add 0.2% by weight of surfactant polyethylene glycol to it. Alcohol, heated to 60°C; then slowly drop the ethanol solution of tetrabutyl titanate into the ethanol aqueous solution, and vigorously stir, and cool naturally after the dropwise addition. TiO formed by hydrolysis 2 Precipitation and filtration, drying at 80°C to obtain TiO 2 powder, and then annealed at 200-700°C to obtain TiO 2 nanoparticles.

example 2

[0052] Example 2: Fe 3+ Compound doped nano TiO 2 Preparation of granules:

[0053] Take 20ml of tetrabutyl titanate and dissolve it in an ethanol solvent, add an appropriate amount of trimethoxyiron to it, the molar ratio of trimethoxyiron to tetrabutyl titanate is 0.5%; another take after mixing 30ml of distilled water and 30ml of ethanol Add a few drops of hydrochloric acid to make the pH value 8-13, and add 0.2% by weight surfactant polyethylene glycol to the solution, and heat to 60°C; then slowly drop the ethanol solution of tetrabutyl titanate and heat the ethanol aqueous solution in, and vigorously stirred, and cooled naturally after the dropwise addition. TiO formed by hydrolysis 2 Precipitation and filtration, drying at 80°C to obtain TiO 2 Powder, then annealed at 200-700°C to obtain Fe 3+ compound doped TiO 2 nanoparticles.

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Abstract

The present invention is foamed aluminum supported titania catalyst and its preparation process and application, and features that the catalyst has foamed aluminum carrier and nanometer titania or nanometer doped titania on the surface of the carrier. The catalyst has simple preparation process, facile material, excellent stability, high catalytic activity, convenient use and convenient reuse, and may be used widely in various photocatalytic fields for purifying air, purifying water, treating toxic waste water, purifying atmosphere, sterilizing, etc.

Description

Technical field: [0001] The invention relates to a preparation method of a catalyst used in air purification. Background technique: [0002] As the environmental pollution becomes more and more prominent, the air quality problem has attracted more and more attention. The heterogeneous photocatalytic process of using semiconductor photocatalysis to degrade organic pollutants in the air has become an ideal environmental treatment technology. [0003] The use of photocatalytic technology can use water vapor and oxygen in the air to remove pollutants in the air, hydrogen sulfide, nitrogen oxides, formaldehyde and other harmful gases at room temperature. Compared with the catalytic oxidation method that can only be carried out at high temperatures, photocatalytic Oxidation technology has significant advantages. The use of photocatalysts has greatly improved the efficiency of air purification. In addition, nanomaterials can also be used as bactericidal and algae-killing materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/10B01J37/02B01D53/86
Inventor 冯乙巳王新福韩福生蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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