Preparation method of carbon-based composite material capable of catalytically degrading various organic matters at room temperature, and testing device

A composite material and catalytic degradation technology, which is applied in the field of preparation of carbon-based composite materials, can solve the problems such as being unsuitable for low-concentration organic compounds, incapable of being non-toxic and harmless, and unsatisfactory photocatalytic degradation performance, and achieving catalytic degradation ability. Strong, low cost, good removal performance

Active Publication Date: 2020-12-22
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of purification materials to remove organic compounds (VOCs) in indoor air is an important way to solve this problem. Among them, activated carbon adsorption is considered to be a relatively reliable and safe purification method, and it has been widely used in the purification of organic compounds (VOCs) in indoor air. , but the adsorption capacity of activated carbon is limited, and when the adsorption reaches saturation, it does not have the ability to remove
In addition, the toxic gas adsorbed in the pores of activated carbon has the risk of desorption and release, so there is a possibility of secondary pollution
It can be seen that activated carbon can only temporarily enrich organic compounds (VOCs), and cannot fundamentally convert organic compounds (VOCs) into non-toxic and harmless carbon dioxide and water.
In addition, although photocatalytic degradation and thermocatalytic combustion are common means to remove high-concentration organic compounds (VOCs) in industry, thermocatalysis has high energy consumption and large equipment investment, which is not suitable for the removal of low-concentration organic compounds (VOCs); photocatalysis The degradation performance is not ideal, the catalytic process produces toxic and harmful intermediate products, and it is difficult to completely mineralize organic matter
It can be seen that photocatalysis and thermal catalysis are not suitable for the purification of low-concentration organic compounds (VOCs) indoors in general households.

Method used

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  • Preparation method of carbon-based composite material capable of catalytically degrading various organic matters at room temperature, and testing device
  • Preparation method of carbon-based composite material capable of catalytically degrading various organic matters at room temperature, and testing device
  • Preparation method of carbon-based composite material capable of catalytically degrading various organic matters at room temperature, and testing device

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Preparation of the first modified metal oxide 1:

[0029] a. Add 0.01mol of silver nitrate and 0.01mol of zinc nitrate and 20g of molybdenum oxide into water respectively, stir well, transfer the mixture to a high-pressure reactor and react at 200°C for 12 hours, wash to neutral after cooling, and obtain the first modification Sexual metal oxide 1;

[0030] Preparation of modified metal oxide 2:

[0031]b. Add 0.05mol of copper nitrate, 50g of titanium dioxide, 50g of manganese dioxide and 50g of zinc oxide into water respectively, stir well, transfer the mixture to an autoclave and react at 300°C for 24 hours, wash to neutral after cooling, and obtain The second modified metal oxide 2;

[0032] Preparation of carbon-based composite materials:

[0033] c. According to the mass ratio of 1:0.1:0.1:0.1, respectively weigh the raw material modified cotton stalk activated carbon, bentonite, the first modified metal oxide 1 obtained in step a and the second modified metal ...

Embodiment 2

[0037] Preparation of the first modified metal oxide 1:

[0038] a. Add 0.01mol of silver nitrate and 0.01mol of zinc nitrate and 20g of molybdenum oxide into water respectively, stir well, transfer the mixture to a high-pressure reactor and react at 200°C for 12 hours, wash to neutral after cooling, and obtain the first modification Sexual metal oxide 1;

[0039] Preparation of the second modified metal oxide 2:

[0040] b. Add 0.05mol ferric nitrate, 50g titanium dioxide, 50g manganese dioxide and 50g zinc oxide into water respectively, stir well, transfer the mixture to an autoclave and react at 300°C for 24 hours, wash to neutral after cooling, and obtain The second modified metal oxide 2;

[0041] Preparation of carbon-based composite materials:

[0042] c. According to the mass ratio of 1:0.2:0.3:0.3, weigh the raw material modified fruit wood activated carbon, attapulgite, the first modified metal oxide 1 obtained in step a and the second modified metal oxide obtaine...

Embodiment 3

[0046] Preparation of the first modified metal oxide 1:

[0047] a. Add 0.01mol of silver nitrate and 0.01mol of zinc nitrate and 20g of molybdenum oxide into water respectively, stir well, transfer the mixture to a high-pressure reactor and react at 200°C for 12 hours, wash to neutral after cooling, and obtain the first modification Sexual metal oxide 1;

[0048] Preparation of the second modified metal oxide 2:

[0049] b. Add 0.05mol of nickel nitrate, 50g of titanium dioxide, 50g of manganese dioxide and 50g of zinc oxide into water respectively, stir well, transfer the mixture to an autoclave and react at 300°C for 24 hours, wash to neutral after cooling, and obtain The second modified metal oxide 2;

[0050] Preparation of carbon-based composite materials:

[0051] c. According to the mass ratio of 1:0.3:0.4:0.4, weigh the raw material modified apricot shell activated carbon, bentonite, the first modified metal oxide 1 obtained in step a and the second modified metal ...

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Abstract

The invention relates to a preparation method of a carbon-based composite material for catalytically degrading volatile organic compounds at room temperature, and a testing device. The method comprises the following steps: with modified activated carbon, clay, a first modified metal oxide 1 and a second modified metal oxide 2 as raw materials, conducting full mixing and granulating or extrusion-molding to prepare a columnar or spherical particle or honeycomb cube; and roasting the columnar or spherical particle or honeycomb cube in an inert atmosphere to obtain the formed carbon-based composite material with high specific surface area, high strength and long service life. The obtained columnar or spherical or honeycomb-shaped carbon-based composite material is used for catalytically degrading various volatile organic compounds such as formaldehyde, benzene, methylbenzene, xylene, phenol, chlorophenol, benzaldehyde, chloroethane, cyclohexane or amyl acetate in a gas phase at room temperature; and results show that the catalytic degradation rate of volatile organic compounds such as methylbenzene, benzene and formaldehyde with a low concentration of 1-5 mg / m<3> within 24 hours is upto 95% or above, and the catalytic degradation rate of methylbenzene, benzene, formaldehyde and the like with a high concentration of 5-10 mg / m<3> within 24 hours is up to 90% or above.

Description

technical field [0001] The invention relates to a preparation method and a test device of a carbon-based composite material for catalytically degrading volatile organic compounds at room temperature. Background technique [0002] Indoor air pollution caused by a variety of volatile organic compounds (VOCs) emitted from building decoration and furniture endangers people's health and quality of life, and has become a social issue that people worry about, leaders care about, and the media pay attention to. How to effectively control indoor organic compounds ( VOCs) pollution has also become a research hotspot in the field of indoor air in my country. The use of purification materials to remove organic compounds (VOCs) in indoor air is an important way to solve this problem. Among them, activated carbon adsorption is considered to be a relatively reliable and safe purification method, and it has been widely used in the purification of organic compounds (VOCs) in indoor air. , bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/86B01D53/44G01N30/88B01J23/89
CPCB01J20/20B01D53/8687G01N30/88B01J23/8993B01J23/002G01N2030/884B01J35/1023B01J2523/00B01D2255/802B01D2257/708B01D2258/06B01J2523/17B01J2523/18B01J2523/27B01J2523/47B01J2523/68B01J2523/72B01J2523/842B01J2523/847B01J2523/845Y02A50/20
Inventor 殷娇朱慧程飞
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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