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Catalyst for catalytic oxidation of formaldehyde at room temperature and preparation method thereof

A catalytic oxidation and catalyst technology, which is applied in the fields of catalyst materials, environmental catalysis and environmental protection, can solve problems such as human health hazards and long volatilization periods, and achieve the effects of low cost, easy operation, and improved valence

Active Publication Date: 2021-08-27
NINGBO UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Indoor formaldehyde mainly comes from decorative materials, such as composite boards, fiberboards, particle boards and other artificial boards, which have a long volatilization period. Long-term exposure to harsh indoor air environments will cause immeasurable harm to human health

Method used

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  • Catalyst for catalytic oxidation of formaldehyde at room temperature and preparation method thereof
  • Catalyst for catalytic oxidation of formaldehyde at room temperature and preparation method thereof
  • Catalyst for catalytic oxidation of formaldehyde at room temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A simple preparation method of nanosheet AlOOH, the steps are as follows:

[0029] 1) Measure 100 ml cyclohexane and 20.5 g PEG (polyethylene glycol), mix them in a beaker, stir at room temperature for 10-20min, and rotate at 900-1000rpm;

[0030] 2) Weigh 2.016 g Al(NO 3 ) 3 9H 2 O, add deionized water to dissolve to 20 ml, get Al(NO 3 ) 3 solution;

[0031] 3) Slowly add the solution obtained in step 2) to the mixture described in step 1), and then stir at room temperature for 10-20min at a speed of 900-1000rpm;

[0032] 4) In the solution obtained in step 3), add 3.85 ml of concentrated ammonia water dropwise, the solution begins to appear white precipitate, keep stirring at room temperature for more than 2 hours, the speed is 900-1000rpm;

[0033] 5) Centrifuge the solution obtained in step 4) at a speed of 2000-2500 rpm for 3-5 minutes. After centrifugation, take the precipitate, add deionized water to wash, and centrifuge again. Repeat the centrifugation and...

Embodiment 2

[0037] A kind of AlOOH / MnO 2 Composite catalyst and preparation method thereof, the preparation steps are as follows:

[0038]1) Measure 100 ml of cyclohexane and 20.5 g of PEG (polyethylene glycol), mix them in a beaker, stir at room temperature for 10-20 minutes, and rotate at 900-1000 rpm;

[0039] 2) Weigh 2.016 g Al(NO 3 ) 3 9H 2 O, add deionized water to dissolve to 20 ml, get Al(NO 3 ) 3 solution;

[0040] 3) Slowly add the solution obtained in step 2) to the mixture described in step 1), and then stir at room temperature for 10-20min at a speed of 900-1000 rpm;

[0041] 4) In the solution obtained in step 3), add 3.85 ml of concentrated ammonia water dropwise, and the solution begins to appear white precipitate, keep stirring at room temperature for more than 2 hours, and the speed is 900-1000 rpm;

[0042] 5) Centrifuge the solution obtained in step 4) at a speed of 2000-2500 rpm for 3-5 minutes. After centrifugation, take the precipitate, add deionized water t...

Embodiment 3

[0052] AlOOH and MnO generated on the surface of metal Al mesh 2 Composite catalyst and preparation method thereof, the preparation steps are as follows:

[0053] 1) The metal Al mesh was immersed in 0.1 wt% NaOH solution for 2 min at room temperature to remove the surface alumina layer, and then rinsed with deionized water;

[0054] 2) Put the treated metal Al mesh in a hydrothermal kettle, add deionized water, heat it to 120°C for 2 hours, and generate AlOOH on the surface of the Al mesh;

[0055] 3) Immerse the Al mesh with AlOOH attached on the surface as described in step 2) into 0.1 M KMnO 4 In the solution for more than 12 h, AlOOH / MnO is formed on the surface 2 The composite was rinsed with deionized water and dried at room temperature to obtain AlOOH / MnO attached to the surface of the metal Al mesh. 2 composite catalyst material.

[0056] In the catalyst prepared in this example, AlOOH and MnO produced on the surface of the metal Al mesh 2 Composite, due to the e...

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Abstract

The invention discloses a composite catalyst for catalytically oxidizing formaldehyde at room temperature, the catalyst is composed of AlOOH and MnO 2 Composite. The invention also discloses a preparation method of nano flake AlOOH powder. AlOOH / MnO is further disclosed 2 Preparation method of composite catalyst, utilizing AlOOH and KMnO 4 Reaction, through the surface hydroxyl groups in AlOOH and KMnO 4 Reactive combination to form AlOOH / MnO 2 Composite catalyst. The composite catalyst prepared by the invention can efficiently degrade formaldehyde at room temperature, has simple preparation method, low cost, and is easy to popularize and apply.

Description

technical field [0001] The invention belongs to the fields of catalyst materials, environmental catalysis and environmental protection, and relates to a catalyst for catalytic oxidation of formaldehyde at room temperature, in particular to a composite oxide catalyst and its preparation method and application. Background technique [0002] Formaldehyde (HCHO) is a colorless gas with a strong pungent odor at atmospheric pressure. Indoor formaldehyde mainly comes from decorative materials, such as composite boards, fiberboards, particle boards and other man-made boards, which have a long volatilization period. Long-term exposure to harsh indoor air environments will cause immeasurable harm to human health. Therefore, it is very important for human health to effectively remove formaldehyde and improve the indoor environment. [0003] At present, the commonly used methods that can effectively remove formaldehyde include adsorption, photocatalysis and catalytic oxidation. Among ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J35/10B01D53/86B01D53/72
CPCB01D53/8668B01D2259/4508B01J23/34B01J35/1019
Inventor 王敬蕊宋琨诸葛飞曹鸿涛
Owner NINGBO UNIVERSITY OF TECHNOLOGY