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Formaldehyde-removing purifying material and preparation method and application thereof

A formaldehyde purification, porous adsorption material technology, applied in the field of air purification, can solve the problems of many types of by-products, high cost of precious metal catalysts, inability to convert into carbon dioxide and water, etc., achieve complete formaldehyde, reduce the ineffective adsorption area of ​​large micropores, The effect of increasing the effective adsorption area

Active Publication Date: 2020-04-24
北京零微科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formaldehyde degradation rate of the product prepared by this invention exceeds 90% in 24 hours, but there are many types of by-products in the photocatalytic method, and formaldehyde cannot be completely converted into carbon dioxide and water, which is potentially harmful; A method for preparing a sex-supported noble metal monolithic catalyst, the method adopts honeycomb ceramics loaded with rare earth modified inorganic oxides such as titanium oxide, aluminum oxide, calcium oxide, magnesium oxide and other inorganic oxides as a carrier, and the honeycomb ceramics are respectively loaded Metal nanoparticles with different contents of Pt, Pd, Ag, Au, Rh, Ru, etc.
It is characterized by no need for external heating, light, electricity and other external energy sources or auxiliary means, and maintains stable activity for a long time without any by-products. It is suitable for efficiently removing formaldehyde emission pollution in closed and semi-closed spaces such as indoor home environments and work spaces. , but the cost of noble metal catalysts is higher

Method used

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  • Formaldehyde-removing purifying material and preparation method and application thereof
  • Formaldehyde-removing purifying material and preparation method and application thereof
  • Formaldehyde-removing purifying material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071]This embodiment provides a formaldehyde-removing purification material. The purification material uses transparent silicon oxide as a carrier, and the outer surface of the carrier and the inner surface of the hole are used as an inner layer. An ethyleneimine layer was used as the middle layer and an amide-type amino acid layer with a thickness of 0.5 nm was used as the outermost layer.

[0072] The preparation method of described purification material, comprises the following steps:

[0073] (1) Use the equal volume impregnation method to make the specific surface area 250m 2 / g transparent silica carrier, completely immersed in the polyethyleneimine solution, the molecular weight of the polyethyleneimine is 10000, the solution controls the mass ratio of polyethyleneimine to water to be 0.02:1, soaked for 2h, Take it out, and dry it at 80°C for 24 hours to obtain a carrier provided with a polyethyleneimine layer;

[0074] (2) Mix sodium carbonate solution and glutamine...

Embodiment 2

[0083] Compared with Example 1, the only difference is that glutamine in step (2) is replaced by asparagine.

[0084] The formaldehyde-removing purification material prepared in this example, in a 30-cubic closed experimental cabin, has a formaldehyde-removing CADR value of 132m measured by the phenol reagent method. 3 / h, the specific data are shown in Table 2.

[0085] Table 2

[0086] time / min 0 5 10 15 20 25 30 35 Formaldehyde concentration (mg / m 3 )

[0087] As can be seen from Table 2, the formaldehyde removal purification material passed in this embodiment, after 35 minutes, the formaldehyde concentration in the experimental cabin was changed from 1.158mg / m 3 Reduced to 0.099mg / m 3 , the removal rate of formaldehyde was 91.45%, which shows that the formaldehyde removal purification material provided in this embodiment has a good formaldehyde removal effect.

Embodiment 3

[0089] This embodiment provides a formaldehyde-removing purification material. The purification material uses white titanium oxide as a carrier, and the outer surface of the carrier and the inner surface of the hole are used as an inner layer. A polyethyleneimine layer was used as the middle layer and an amide-based amino acid layer with a thickness of 0.5 nm was used as the outermost layer.

[0090] The preparation method of described purification material, comprises the following steps:

[0091] (1) Use the equal volume impregnation method to make the specific surface area 200m 2 The white titanium oxide carrier of / g is completely immersed in the polyethyleneimine solution, and the molecular weight of the polyethyleneimine is 50000, and the mass ratio of polyethyleneimine and water is controlled by the solution to be 0.3:1, soaked for 5h, Take it out, and dry it at 110°C for 12 hours to obtain a carrier provided with a polyethyleneimine layer;

[0092] (2) Mix sodium carb...

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Abstract

The invention relates to a formaldehyde-removing purifying material and a preparation method and application thereof. The formaldehyde-removing purifying material takes a porous adsorbing material asa carrier, the outer surface and the pore inner surface of the carrier are taken as inner layers, and a polyethyleneimine layer is arranged on the inner layer as a middle layer and an amide amino acidlayer serves as an outermost layer. According to the formaldehyde-removing purifying material provided by the invention, polyethyleneimine and amide amino acids are grafted to the outer surface of the carrier and the inner surfaces of the pores, the formaldehyde adsorption capacity and the reaction rate of the carrier can be enhanced, the formaldehyde removing speed can be accelerated, the good formaldehyde removing effect is provided, the formaldehyde removing rate can achieve more than 91% in 35 mins measured by a phenol reagent method in a 30 cube sealed experiment cabin, and the CADR value is more than 90 m<3> / h. The color indicator is further added into the amide amino acid layer, so that the service life of the purifying material can be indicated, and meanwhile, a user is reminded to replace the purifying material in time.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular to a formaldehyde-removing purification material and its preparation method and application. Background technique [0002] Formaldehyde is a common pollutant in indoor air. Formaldehyde is released from indoor building decoration materials such as wood-based panels and products, paints, and carpets. Studies have shown that indoor formaldehyde can last for decades. The World Health Organization (WHO) research shows that , Long-term exposure to high-risk VOCs containing formaldehyde and benzene series may cause cancer and leukemia. Therefore, purifying the air environment and improving air quality have become an urgent need in people's lives. [0003] At present, the purification methods of formaldehyde in indoor air mainly include: [0004] (1) Activated carbon adsorption method, using activated carbon packs or activated carbon placed in the position where formaldehyde need...

Claims

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Application Information

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IPC IPC(8): B01D53/02B01D53/72B01D53/81
CPCB01D53/02B01D53/72B01D53/81B01D2257/704B01D2258/06
Inventor 于书权陈运法姜风
Owner 北京零微科技有限公司
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