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A multifunctional single-atom catalyst for comprehensive air purification and its preparation method

An atomic and aspect-based technology, applied in the field of single-atom catalysts and its preparation, can solve problems such as harmful to the body, easy to oxidize and deactivate, and expensive nano-silver materials, and achieve strong adsorption effects

Active Publication Date: 2021-01-15
LINKWAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A multifunctional single-atom catalyst for comprehensive air purification and its preparation method
  • A multifunctional single-atom catalyst for comprehensive air purification and its preparation method
  • A multifunctional single-atom catalyst for comprehensive air purification and its preparation method

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preparation example Construction

[0029] The ZIFs-based metal-organic framework material in the single-atom catalyst of the present application is an organometallic framework material well known to those skilled in the art, wherein the first transition metal element is Zn or Co, and 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. The application also provides a method for preparing the single-atom catalyst, comprising the following steps:

[0030] mixing ZIFs-based metal-organic framework materials, an organic solvent and an aqueous solution of a second transition metal compound, and drying to obtain a solid powder;

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

[0032] In the above-mentioned process of preparing single-atom catalysts, the pres...

Embodiment 1

[0046] Preparation of catalysts with different atomic weight Fe single atom dispersion:

[0047] (1) Configure 0.125mol / L zinc nitrate hexahydrate methanol solution, 0.5mol / L dimethylimidazole methanol solution; then add 30 ml of 0.125mol / L zinc nitrate hexahydrate methanol solution to 30 ml of dimethyl imidazole methanol solution, ultrasonically dissolved, and then the mixed solution was stirred overnight;

[0048] (2) centrifuging the obtained mixed solution with methanol for 3 to 5 times, drying in an oven at 70° C. overnight to obtain a solid metal organic framework material 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), then add 30 ul of ferric 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, then put it into a tube furnace and seal it with an...

Embodiment 2

[0052] Preparation of catalysts with different atomic weight Co single atom dispersion:

[0053] (1) Configure 0.125mol / L zinc nitrate hexahydrate methanol solution, 0.5mol / L dimethylimidazole methanol solution; then add 30 ml of 0.125mol / L zinc nitrate hexahydrate methanol solution to 30 ml of dimethyl imidazole methanol solution, ultrasonically dissolved, and then the mixed solution was stirred overnight;

[0054] (2) centrifuging the obtained mixed solution with methanol for 3 to 5 times, drying in an oven at 70° C. overnight to obtain a solid metal organic framework material 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), then add 30 ul of cobalt nitrate aqueous solution with a concentration of 10 to 100 mg / ml and stir for 2 to Wash and dry after 4 hours;

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

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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 technical field of purification, in particular to a single-atom catalyst, its preparation method and its application. Background technique [0002] Due to insufficient anticipation and poor prevention of the negative impact of highly developed industries, the global environmental pollution problem is becoming more and more serious, which endangers the healthy survival and development of human beings. Therefore, the governance of the pollution problem is imminent. 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, haze 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 exposure to these p...

Claims

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Application Information

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Patent Type & Authority Patents(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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