Multifunctional monoatomic catalyst used for comprehensive purification of air and preparation method of catalyst

A catalyst and atomic technology, applied in the field of purification, can solve the problems of harmfulness to the body, expensive nano-silver materials, expensive devices, etc., and achieve the effect of strong adsorption

Active Publication Date: 2019-11-15
LINKWAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Powerful ultraviolet light devices are expensive and harmful to the body; photocatalytic materials need to rely heavily on external light sources; nano-silver materials are expensive and easy to oxidize and deactivate
For formaldehyde, the devices currently on the market mainly rely on the high-efficiency adsorption of activated carbon, which cannot fundamentally and effectively convert formaldehyde into carbon dioxide, and the threat still exists

Method used

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  • Multifunctional monoatomic catalyst used for comprehensive purification of air and preparation method of catalyst
  • Multifunctional monoatomic catalyst used for comprehensive purification of air and preparation method of catalyst
  • Multifunctional monoatomic catalyst used for comprehensive purification of air and preparation method of catalyst

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preparation example Construction

[0029] The ZIFs-based metal-organic framework materials in the single-atom catalysts of the present application are organometallic framework materials well known to those skilled in the art, wherein the first transition metal element is Zn or Co. In the present application, the first transition metal element is Zn; In this application, the second transition metal element is selected from one or more of IB, IIB, and VIII; specifically, the second transition metal element is selected from Fe, Co, Ni, Cu, Ag One or more of, Mn and Zn. This application also provides a preparation method of the single-atom catalyst, including the following steps:

[0030] Mix the ZIFs-based metal organic framework material, organic solvent, and the aqueous solution of the second transition metal compound, and obtain solid powder after drying;

[0031] The solid powder is calcined to obtain a single-atom catalyst.

[0032] In the process of preparing the single-atom catalyst, this application first needs...

Embodiment 1

[0046] Preparation of Fe monoatom dispersed catalysts with different atomic weights:

[0047] (1) Prepare 0.125mol / L zinc nitrate hexahydrate methanol solution, 0.5mol / L dimethylimidazole methanol solution; then add 30ml 0.125mol / L zinc nitrate hexahydrate methanol solution to 30ml dimethylimidazole methanol solution Dissolve the base imidazole in methanol solution ultrasonically, and then stir the mixed solution overnight;

[0048] (2) Centrifugally wash the obtained mixed solution with methanol for 3 to 5 times, and dry it in an oven at 70°C overnight to obtain a metal organic framework material solid powder;

[0049] (3) Disperse 100 mg of the metal organic framework obtained above in a mixed solution of 10 mL of ethanol and water (v / v = 1 / 1), and then add 30 ul of iron nitrate aqueous solution with a concentration of 10 to 100 mg / ml and stir for 2 to 4 hours. After washing and drying;

[0050] (4) Put the obtained solid powder into a porcelain boat, and then put it into a tube fu...

Embodiment 2

[0052] Preparation of Co monoatom dispersed catalysts with different atomic weights:

[0053] (1) Prepare 0.125mol / L zinc nitrate hexahydrate methanol solution, 0.5mol / L dimethylimidazole methanol solution; then add 30ml 0.125mol / L zinc nitrate hexahydrate methanol solution to 30ml dimethylimidazole methanol solution Dissolve the base imidazole in methanol solution ultrasonically, and then stir the mixed solution overnight;

[0054] (2) Centrifugally wash the obtained mixed solution with methanol for 3 to 5 times, and dry it in an oven at 70°C overnight to obtain a metal organic framework material solid powder;

[0055] (3) Disperse 100 mg of the metal organic framework material obtained above in a mixed solution of 10 mL of ethanol and water (v / v=1 / 1), and then add 30 ul of cobalt nitrate aqueous solution with a concentration of 10-100 mg / ml and stir for 2~ Wash and dry after 4h;

[0056] (4) Put the obtained solid powder into a porcelain boat, and then put it into a tube furnace to...

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Abstract

The invention provides a monoatomic catalyst. The catalyst is composed of a carbon carrier and a second transition metal element, and the carbon carrier is formed by volatilization of a first transition metal element in a ZIFs-based metal organic framework material and carbonization of dimethylimidazole; and the second transition metal atom interacts with a N atom in the carbon carrier and is coated by the carbon carrier in the form of a single atom. The present application also provides a preparation method and application of the monoatomic catalyst. The monoatomic catalyst provided by the invention exhibits great application potentiality in comprehensive purification of the air as a catalyst, and has multiple functions such as broad-spectrum antibacterial performance, fog and haze removal, and formaldehyde removal.

Description

Technical field [0001] The invention relates to the field of purification technology, in particular to a single-atom catalyst, its preparation method and its application. Background technique [0002] Due to people's insufficient anticipation of the negative effects of highly developed industries and unfavorable prevention, the global environmental pollution problem is becoming more and more serious and endangering the healthy survival and development of human beings. Therefore, the treatment of the pollution problem has been urgent. At present, environmental pollution is mainly divided into air pollution, soil pollution and water pollution; among them, air pollution has the most direct impact on people, indoor and outdoor bacteria, smog particles (PM 2.5 And PM 10 ), formaldehyde and other small molecules and other pollutants continue to affect people’s health. Every day, people are infected with respiratory organs, visual organs, cancer, leukemia and other diseases due to exposu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01D53/72B01D53/86
CPCB01D53/8668B01J27/24
Inventor 吴宇恩赵超
Owner LINKWAY TECH CO LTD
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