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AgCo bimetallic catalyst with adsorption-catalysis double functions for use in removal of formaldehyde and preparation method thereof

A bimetallic catalyst and a technology for eliminating formaldehyde, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of catalyst formaldehyde conversion rate decline, etc., and achieve reduced application costs, low cost, and simple preparation methods Effect

Inactive Publication Date: 2014-08-06
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the acidity of the solution is not properly controlled during the preparation of metal oxides, the formaldehyde conversion rate of the catalyst will decrease

Method used

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  • AgCo bimetallic catalyst with adsorption-catalysis double functions for use in removal of formaldehyde and preparation method thereof
  • AgCo bimetallic catalyst with adsorption-catalysis double functions for use in removal of formaldehyde and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Condensate and reflux 2.0g MCM-41 and 10.0g APTES in 200mL of absolute ethanol at 80-100°C for 24h, centrifuge, wash, dry at 80°C for 24h, and calcinate at 500°C for 6h to obtain APTESMCM-41 sample; weigh 1.0 g APTESMCM-41 in 40mL deionized water to obtain APTESMCM-41 aqueous solution, stirred at room temperature for 15min, added 0.0945g AgNO 3 , stirred at room temperature for 15 minutes, and quickly added 10 mL of 2M NaBH 4 The solution was chemically reduced, continued to stir at room temperature for 30 min, and then centrifuged and washed to obtain a 6% Ag / APTESMCM-41 sample; the washed Ag / APTESMCM-41 sample was dissolved in 40 mL of deionized water and stirred at room temperature for 15 min, followed by adding 0.099 g Co(NO 3 ) 2 ·6H 2 O, stir at room temperature for 15min, continue to add 10mL of 2M NaBH rapidly 4 The solution was chemically reduced, continued to stir at room temperature for 30 minutes, and then centrifuged and washed; finally, the centrifuged ...

Embodiment 2

[0019] According to the preparation method of Example 1, 0.126g AgNO 3 Added to APTESMCM-41 sample without adding Co(NO 3 ) 2 ·6H 2 O, the rest of the steps remained the same to obtain a 8Ag0Co / APTESMCM-41 sample (the mass fraction of Ag was 8%, the mass fraction of Co was 0%, and the Ag / Co mass ratio was 1 / 0).

Embodiment 3

[0021] According to the preparation method of Example 1, 0.396g Co(NO 3 ) 2 ·6H 2 O was added to the APTESMCM-41 sample without the addition of AgNO 3 , and the rest of the steps remain the same to obtain the 0Ag8Co / APTESMCM-41 sample (the mass fraction of Ag is 0%, the mass fraction of Co is 8%, and the Ag / Co mass ratio is 0 / 1).

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Abstract

The invention discloses an AgCo bimetallic catalyst with adsorption-catalysis double functions for use in removal of formaldehyde and a preparation method thereof. In the bimetallic catalyst, mesoporous silicon material modified by 3-aminopropyltriethoxysilane (APTES) is taken as a carrier of the bimetallic catalyst, and active components are transition metals of cobalt and silver. Compared with the noble metals of Pt and Au, an Ag nano-metal is relatively low in price, so that the practical application cost is reduced; Co is taken as one of the active components of a bimetal, and an oxide is turned from a carrier to an active component in comparison to a noble metal / oxide catalyst, so that the content of oxide components is lowered; the mesoporous silicon material modified by APTES is taken as a catalyst carrier, so that the specific surface area is increased greatly, and the dispersion of active components and normal-temperature adsorption of formaldehyde are promoted in comparison to the oxide carrier. The method is simple in steps and short in period. A strong interaction occurs between the metals of Ag and Co in a synthesis process, so that low-temperature catalytic oxidation removal of formaldehyde is facilitated.

Description

technical field [0001] The invention relates to the technical field of indoor air formaldehyde purification, and relates to an AgCo bimetallic catalyst with dual functions of adsorption and catalysis for eliminating formaldehyde and a preparation method thereof. Background technique [0002] Formaldehyde, also known as formaldehyde, has high toxicity and has been identified as a carcinogenic and teratogenic substance by the World Health Organization. It is an important VOC (Volatile Organic Compounds) pollutant. Formaldehyde has a wide range of sources, and building decoration and decoration materials, as well as a variety of indoor daily necessities, can slowly release formaldehyde. With the improvement of people's living standards, the quality requirements of indoor air are becoming more and more stringent, so the elimination and degradation of indoor formaldehyde has very important practical significance. [0003] Formaldehyde treatment technology includes activated carb...

Claims

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Application Information

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IPC IPC(8): B01J29/74B01J20/16B01J20/30B01D53/86B01D53/72
Inventor 曲振平陈丹孙亚会
Owner DALIAN UNIV OF TECH
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