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Visible light catalyst with molecular sieve of silica-alumina media poves as substrate and its preparing method

A mesoporous molecular sieve, visible light technology, applied in the field of photocatalysis and material chemistry, can solve the problem of low photocatalytic activity

Inactive Publication Date: 2005-02-16
王家强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Chinese patent 0115865.4 discloses a name called "visible light response photocatalyst", which uses a mixed layer of titanium dioxide and silicon dioxide, but is not doped with metal elements
According to the applicant's research, there is no mesoporous material as a carrier and no transition metal doping, so the visible light catalytic activity is extremely low

Method used

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  • Visible light catalyst with molecular sieve of silica-alumina media poves as substrate and its preparing method
  • Visible light catalyst with molecular sieve of silica-alumina media poves as substrate and its preparing method
  • Visible light catalyst with molecular sieve of silica-alumina media poves as substrate and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 2.4 g of cetyltrimethylammonium bromide and 0.5 g of sodium hydroxide were dissolved in 33 g of deionized water, and 5 g of ethyl orthosilicate was added under vigorous stirring. 0.12 g of cobalt nitrate was dissolved in 5 g of deionized water and added to the preceding solution. Crystallize in a reactor at 100°C for 5 days, filter, wash, and dry in the air; calcinate the dried product in an air atmosphere at 550°C for 6 hours to obtain a visible light-responsive photocatalyst that does not support titanium dioxide and uses MCM-41 as the matrix.

Embodiment 2

[0040] 2.0g of cetyltrimethylammonium bromide and 0.3g of sodium hydroxide were dissolved in 30g of deionized water; 0.5g of aluminum trichloride was dissolved in water and added to the aforementioned solution; 4.5g of orthosilicon was added under vigorous stirring ethyl acetate. 0.15 g of cobalt nitrate was dissolved in 4 g of deionized water and added to the preceding solution. Crystallize in a reactor at 100°C for 5 days, filter, wash, and dry in the air; calcinate the dried product in an air atmosphere at 550°C for 6 hours to obtain a visible light-responsive photocatalyst that does not support titanium dioxide and uses AlMCM-41 as a matrix.

Embodiment 3

[0042] Disperse 1.5g of the sample obtained in Example 1 or Example 2 in 120ml of isopropanol, then add 2g of titanium isopropoxide, and stir until dry; calcinate in an air atmosphere at 450°C for 3 hours to obtain MCM-41 loaded with titanium dioxide. Or AlMCM-41 is a visible light-responsive photocatalyst based on the substrate.

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Abstract

A visual light catalyst based on metaporous Si-Al molecular sieve for removing aldehyde from air is prepared from the metaporous Si-Al molecular sieves MCM-41 and AlMCM-41 and AlMCM-41 and transition metal. The ratio of Si, Al and transition metal is 55-95%; 1-10%:0.1-1 %. Its advantage is high activity.

Description

[0001] Field [0002] The invention relates to the technical field of photocatalysis and material chemistry, in particular to a visible light catalyst based on a mesoporous molecular sieve and a preparation method thereof. Background technique [0003] With the enhancement of people's awareness of environmental protection, it has become a major trend to develop materials that can be combined with natural resources, or green products, to reduce the degree of environmental damage and improve the quality of life. Among these numerous materials, photocatalyst is one of the important development directions. [0004] Since the first research on photocatalyst was published in the 1970s, researchers from all over the world have devoted themselves to this field. After Japan developed related commercial products in the 1990s, it set off a wave of development and application of photocatalysts. In these studies, due to the strong oxidation-reduction ability, high chemical stability and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/06
Inventor 王家强
Owner 王家强
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