Porous zirconium phosphate-based monatomic catalyst for removing formaldehyde, and preparation method thereof

A zirconium phosphate-based catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of re-release of formaldehyde, difficulty in controlling the release of by-product ozone, and low activity of negative ions

Active Publication Date: 2021-07-06
LINKWAY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption method mainly uses porous materials such as activated carbon and carbon fiber to physically adsorb formaldehyde, but there are disadvantages that the adsorption is easily saturated and formaldehyde will be released again.
Plasma purification technology can decompose formaldehyde molecules at low temperature, but the biggest disadvantage is that it is difficult to control the release of by-product ozone in the product. The release of ozone has an impact on the human respiratory tract and lung function, and is prone to secondary pollution
Negative ion technology can effectively decompose harmful gases such as formaldehyde, but the negative ion activity generated by negative ion technology is extremely low, and it must use external forces such as fans to migrate long distances, so there is a problem of low formaldehyde removal efficiency
Photocatalytic technology is based on TiO 2 Nano-scale catalysts are raw materials loaded on a specific carrier to degrade formaldehyde molecules under an ultraviolet light source. However, the preparation of the material is complicated and the technology is difficult. If it is used in indoor aldehyde removal, it needs to be irradiated with ultraviolet lamps. The production cost is high and it is not easy to market. to promote

Method used

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  • Porous zirconium phosphate-based monatomic catalyst for removing formaldehyde, and preparation method thereof
  • Porous zirconium phosphate-based monatomic catalyst for removing formaldehyde, and preparation method thereof
  • Porous zirconium phosphate-based monatomic catalyst for removing formaldehyde, and preparation method thereof

Examples

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preparation example 1

[0037] Preparation of 1-(2-aminoethyl)-3-(2-diethoxyphosphate)ethylimidazolium bromide liquid: 1-(2-aminoethyl)imidazole hydrobromide with a molar ratio of 1:3 Salt and bromoethyl diethyl phosphate use methanol as solvent, reflux and stir at 90°C for 36h; after the reaction, cool to room temperature, and remove the solvent by rotary evaporation to obtain a viscous liquid, dissolve the obtained liquid in water, add equimolar Sodium hydroxide, stirring at room temperature for 1h, rotary evaporation to remove water, and filtering off solid sodium bromide, vacuum drying for 2h, to obtain ionic liquid 1-(2-aminoethyl)-3-(2-diethoxyphosphate ) ethyl imidazolium bromide.

Embodiment 1

[0040]A porous zirconium phosphate-based single-atom catalyst for formaldehyde removal disclosed in this application is prepared from the following raw materials: porous nano-zirconium phosphate and transition metal; the transition metal is Fe, and the transition metal is in-situ in the form of a single atom packaged on a carrier.

[0041] A preparation method for a porous zirconium phosphate-based single-atom catalyst for removing formaldehyde, comprising the following steps:

[0042] Step 1, preparation of porous nano-zirconium phosphate precursor: 1-(2-aminoethyl)-3-(2-diethoxyphosphate) ethylimidazolium bromide and zirconium nitrate with a molar ratio of 2:3:2 , water and stirred for 30 minutes, and mixed evenly to obtain mixed solution A;

[0043] Step 2, preparation of transition metal single-atom precursor: Add 40ml of 5% ammonia solution dropwise at a rate of 100μL / sec to 200ml of 200g / L ferric nitrate solution and stir for 3h, then raise the temperature to 60°C withi...

Embodiment 2

[0047] A porous zirconium phosphate-based single-atom catalyst for formaldehyde removal, which is prepared from the following raw materials: porous nano-zirconium phosphate and a transition metal; the transition metal is manganese, and the transition metal is in-situ encapsulated on a carrier in the form of a single atom .

[0048] A preparation method for a porous zirconium phosphate-based single-atom catalyst for removing formaldehyde, comprising the following steps:

[0049] Step 1, preparation of porous nano-zirconium phosphate precursor: 1-(2-aminoethyl)-3-(2-diethoxyphosphate) ethylimidazolium bromide and zirconium nitrate with a molar ratio of 2:3:2 , water and stirred for 30 minutes, and mixed evenly to obtain mixed solution A;

[0050] Step 2, preparation of transition metal monoatomic precursor: Add 20ml of 5% ammonia solution dropwise at a rate of 100μL / sec to 100ml of 100g / L manganese nitrate solution and stir for 3h, then raise the temperature to 60°C within 30mi...

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Abstract

The invention relates to the technical field of air purification, and especially relates to a porous zirconium phosphate-based monatomic catalyst for removing formaldehyde, and a preparation method thereof. The porous zirconium phosphate-based monatomic catalyst is prepared from a carrier and transition metal; the carrier is porous nano zirconium phosphate; the transition metal is one or more of Fe, Mn and Ag; and the transition metal is packaged on the carrier in situ in a monatomic form. The catalyst does not need other auxiliary conditions, in an indoor environment, the porous structure of the carrier can efficiently adsorb formaldehyde in air, and the formaldehyde is completely catalytically oxidized and decomposed into carbon dioxide and water by high-activity metal single atoms fixed in the porous structure, so that the formaldehyde is thoroughly removed. Under the indoor condition, the formaldehyde removal rate of the catalyst reaches 99% or above, 99% or above of formaldehyde can be removed in continuous tests for 15 days, no secondary release of formaldehyde is generated, and indoor formaldehyde can be reduced to the safety range specified by the national standard.

Description

technical field [0001] The present application relates to the technical field of air purification, in particular to a porous zirconium phosphate-based single-atom catalyst for removing formaldehyde and a preparation method thereof. Background technique [0002] Indoor environment refers to a closed or semi-closed place where human beings carry out social activities. With the development of the economy, people's living standards have been greatly improved, and higher requirements for a healthy life have been put forward. At this stage, the biggest problem in the indoor environment is the air pollution caused by interior decoration. One of the dominant factors in air pollution is formaldehyde. Formaldehyde is highly toxic and irritating to the skin and mucous membranes. It is recognized by the World Health Organization as a carcinogenic and teratogenic substance, and is the main inducing factor of leukemia. Indoor formaldehyde concentration is greater than 0.08mg / m 3 In fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/187B01J27/185B01J27/18B01D53/86B01D53/72
CPCB01J27/1853B01J27/187B01J27/1817B01D53/8668Y02A50/20
Inventor 赵超王晶黄红锋吴宇波邹俊童助雄
Owner LINKWAY TECH CO LTD
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