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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 the problems of human health hazards and long volatilization period, and achieve the effect of low cost, easy operation and long-term activity

Active Publication Date: 2018-12-07
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 nano-sheet AlOOH, the steps are as follows:

[0029] 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;

[0030] 2) Weigh 2.016 g Al(NO 3 ) 3 ·9H 2 O, add deionized water and dissolve to 20 ml to obtain 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 10-20 minutes at 900-1000 rpm;

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

[0033] 5) Centrifuge the solution obtained in step 4) at 2000-2500 rpm for 3-5 min. After centrifugation, take the precipitate, add deionized water for cleaning, centrifuge again, and repeat the centrifugal cleaning step ...

Embodiment 2

[0037] A kind of AlOOH / MnO 2 The composite catalyst and its preparation method, 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 and dissolve to 20 ml to obtain 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 10-20 minutes at 900-1000 rpm;

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

[0042] 5) Centrifuge the solution obtained in step 4) at 2000-2500 rpm for 3-5 min. After centrifugation, take the precipitate, add deionized water for cleaning, centrifuge again, and re...

Embodiment 3

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

[0053] 1) At room temperature, immerse the metal Al mesh in a 0.1 wt% NaOH solution for 2 minutes to remove the surface alumina layer, and then rinse with deionized water;

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

[0055] 3) Immerse the Al mesh with AlOOH on the surface described in step 2) in 0.1 M KMnO 4 In the solution for more than 12 hours, AlOOH / MnO is formed on the surface 2 The composite is 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] The catalyst prepared in this example combines AlOOH and MnO generated on the surface of the metal Al mesh 2 Composite, due to the existence of ...

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Abstract

The invention discloses a composite catalyst for catalytic oxidation of formaldehyde at a room temperature. The catalyst is composed AlOOH and MnO2. The invention also discloses a preparation method of nanometer sheet-shaped AlOOH powder, and further discloses a preparation method of the AlOOH / MnO2 composite catalyst. AlOOH is reacted with KMnO4 and a surface hydroxyl group in the AlOOH is reactedand combined with the KMnO4 to form the AlOOH / MnO2 composite catalyst. The composite catalyst prepared by the preparation method can efficiently degrade formaldehyde at a room temperature, and the preparation method is simple, low in cost and easy in popularization and application.

Description

Technical field [0001] The invention belongs to the field of catalyst materials, environmental catalysis and environmental protection, and relates to a room temperature catalytic oxidation of formaldehyde catalyst, in particular to a composite oxide catalyst and a preparation method and application thereof. Background technique [0002] Formaldehyde (HCHO) is a colorless gas with a strong pungent odor under atmospheric pressure. Indoor formaldehyde mainly comes from decorative materials, such as composite panels, fiberboards, particleboards and other man-made panels, which have a long volatilization period. Long-term exposure to harsh indoor air environments can cause incalculable 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. In the catalyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J35/10B01D53/86B01D53/72
CPCB01D53/8668B01J23/34B01D2259/4508B01J35/615
Inventor 王敬蕊宋琨诸葛飞曹鸿涛
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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