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Catalyst capable of efficiently decomposing formaldehyde as well as preparation method and application thereof

A catalyst and formaldehyde technology, applied in the field of air purification, can solve the problems of high working temperature, hinder practical application, etc., and achieve the effects of easy operation, easy recovery and immobilization, and low cost

Active Publication Date: 2018-12-14
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these catalysts require high operating temperatures, which greatly hinders their practical applications.

Method used

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  • Catalyst capable of efficiently decomposing formaldehyde as well as preparation method and application thereof
  • Catalyst capable of efficiently decomposing formaldehyde as well as preparation method and application thereof
  • Catalyst capable of efficiently decomposing formaldehyde as well as preparation method and application thereof

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preparation example Construction

[0033] Another aspect of the embodiment of the present invention provides the preparation method of the aforementioned high-efficiency formaldehyde decomposition catalyst, which includes (1) synthesizing a metal complex as an active component; (2) loading the metal complex on a porous carrier. Specifically, the preparation method includes:

[0034] The metal complex and the porous carrier are uniformly mixed in a solvent and reacted at 10-100°C to obtain a catalyst for efficiently decomposing formaldehyde; the metal complex includes [IrCp * Cl 2 ] 2 , [RhCp * Cl 2 ] 2 , [Ir(COD)Cl 2 ] 2 and [Rh(COD)Cl 2 ] 2 Any one or a combination of two or more of them, where Cp * is pentamethylcyclopentadienyl, and COD is 1,5-cyclooctadienyl.

[0035] In some embodiments, the preparation method of the metal complex comprises:

[0036] Appropriate amount of Cp *H (pentamethylcyclopentadiene) and / or 1,5-cyclooctadiene was added to H 2 IrCl 6 and / or RhCl 3 solution, reflux for 3...

Embodiment 1

[0063] 1. the method for preparing described catalyst in the present embodiment is:

[0064] Add the carrier polypyrrole to ethanol, heat and stir, and then add [IrCp * Cl 2 ] 2 , and then stirred at 20-100° C. overnight. After the reaction, the resulting precipitate was filtered, washed, and dried in sequence to obtain an iridium complex catalyst.

[0065] 2. The characterization of the iridium complex catalyst obtained in the present embodiment

[0066] Adopt transmission electron microscope (TEM), scanning electron microscope (SEM) and X-ray photoelectron spectrum (XPS) to characterize the morphology of the iridium complex catalyst obtained in this embodiment, the results refer to Figure 1a to Figure 1d shown. Depend on Figure 1a and Figure 1b It can be seen that the surface of the catalyst provided by this example is distributed with a lot of clustered substances, the shape is similar to that of coral, and the specific surface area is large, which provides a suffic...

Embodiment 2

[0081] The preparation method of the catalyst in this embodiment 2 is basically the same as that of embodiment 1, the difference is that the raw materials used are different, for example, the metal complex can be [RhCp * Cl 2 ] 2 , the porous carrier is polypyrrole.

[0082].The method for preparing described catalyst in the present embodiment is:

[0083] Put the carrier polypyrrole into a solvent, the solvent is one or more combinations of methanol, ethanol, propanol, isopropanol, butanol and water, heat and stir, and then add [RhCp * Cl 2 ] 2 , and then stirred at 20-100° C. overnight. After the reaction, the obtained precipitate was filtered, washed and dried in sequence to obtain a rhodium complex catalyst.

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Abstract

The invention discloses a catalyst capable of efficiently decomposing formaldehyde. The catalyst comprises a metal complex serving as an active component as well as a porous carrier for loading the metal complex; the metal complex is clustered and distributed on the surface of the porous carrier uniformly; the metal complex comprises [IrCp*Cl2]2, [RhCp*Cl2]2, [Ir(COD)Cl2]2 or [Rh(COD)Cl2]2 and thelike; the porous carrier comprises compounds with high specific surface area, such as polypyrrole, C3N4, a covalent triazine skeleton material, polyaniline, activated carbon, polypyrrole or polythiophene. The invention also provides a preparation method of the catalyst. The catalyst provided by the invention has high specific surface area and high catalytic activity and stability in performing catalytic decomposition on gas or liquid formaldehyde; furthermore, the catalyst has metal elements such as Rh or Ir as well as elements such as C, N and Cl, and the utilization rate of metal atoms is up to 100 percent.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for efficiently decomposing formaldehyde, a preparation method thereof and an application in formaldehyde removal, belonging to the technical field of air purification. Background technique [0002] Formaldehyde is a colorless, irritating gas that can irritate human skin and mucous membranes. When formaldehyde reaches a certain concentration indoors, people will feel uncomfortable. The formaldehyde content in newly decorated rooms is relatively high. If people are exposed to rooms containing trace amounts of formaldehyde or even as low as a few ppm for a long time, it may cause eye and respiratory discomfort, headache, pneumonia and even cancer, which is even more harmful to minors. Formaldehyde has become one of the most important air pollutants in the indoor environment. At the same time, the water pollution caused by industrial wastewater containing formaldehyde has also caused great ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01D53/86B01D53/72C02F1/72C02F101/34
CPCB01D53/8668B01J31/2295B01J2531/0225B01J2531/822B01J2531/827C02F1/725C02F2101/34
Inventor 周小春李淑萍沈杨彬
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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