Air purification material and preparation method and application thereof

A technology of air purification materials and fiber materials, which is applied in chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve the problems of weak catalyst loading and powder falling, and achieve good contact, low cost, and low wind resistance.

Active Publication Date: 2014-12-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The applicant of this patent has previously discovered that a birnessite-type manganese oxide has the ability to directly decompose formaldehyde at room temperature (patent application number: 201310139928.3), which can be made by the action of surfactant (cetyl ammonium salt) In-situ loading on polyester fibers, but the carrier of this method is limited to polymer materials, and birnessite cannot be loaded in-situ on other supports other than polymer materials, such as ceramic or metal surfaces, and in actual use There are also problems such as catalyst loading is not firm and powder falling

Method used

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  • Air purification material and preparation method and application thereof
  • Air purification material and preparation method and application thereof
  • Air purification material and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0033] Use cordierite ceramic sheets as the carrier of manganese oxide, add 10g / L KMnO4 solution and 15g / L (NH4)2C2O4 solution into the container and stir well, the ratio of the two is 4:1. The pH of the solution was adjusted to 7.3 with sodium hydroxide, a ceramic sheet made of cordierite was added, and then placed in constant temperature water at 90° C. for 10 h. After the reaction, the honeycomb ceramic sheet loaded with manganese oxide was taken out and washed with deionized water until clarified. Put the cleaned ceramic sheet into an oven at 105° C. for 12 hours and heat and dry it to obtain a formaldehyde purification material.

[0034] figure 1 In a and b are photos before and after loading manganese oxide on the ceramic sheet of the present invention. The color of the ceramic sheet before loading is white, but after loading it is dark, indicating that a large amount of manganese oxide has been loaded on the ceramic sheet. Depend on figure 1 It can be seen that there...

Embodiment 2

[0036] A ceramic sheet made of alumina is used as a carrier of manganese oxide, and 4g / L NaMnO4 solution and 4g / L Na2C2O4 solution are added to the container and stirred evenly, and the ratio of the two is 5:1. The pH of the solution was adjusted to 6 with hydrochloric acid, a ceramic sheet made of alumina was added, and then placed in constant temperature water at 80° C. for 10 h. After the reaction is finished, the honeycomb ceramic sheet loaded with manganese oxide is taken out and washed with deionized water for more than 3 times. The cleaned ceramic sheet was dried in a silica gel drier at room temperature for 12 hours to obtain a formaldehyde purification material.

Embodiment 3

[0038]A ceramic sheet made of mullite is used as a carrier of manganese oxide. Add 4g / L KMnO4 solution and 4g / L K2C2O4 solution into the container and stir well, the ratio of the two is 0.5:1. The pH of the solution was adjusted to 9.3 with sodium hydroxide, a mullite ceramic sheet was added, and then placed in constant temperature water at 60° C. for 24 hours. After the reaction, the honeycomb ceramic sheet loaded with manganese oxide was taken out and washed with deionized water until clarified. The cleaned ceramic sheet was dried in a silica gel desiccator at room temperature for 12 hours, then calcined in a muffle furnace at 500° C. for 2 hours, and then taken out for use.

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Abstract

The invention relates to an air purification material and a preparation method and application thereof, belonging to the technical field of chemical catalytic decomposition, in particular belonging to the technical field of decomposition of formaldehyde pollutants in environment air. The air purification material comprises a base material and manganese oxide, wherein the manganese oxide is supported on the base material, the base material is honeycomb ceramics or a fiber material with a particle filtering function, and the manganese oxide is birnessite manganese oxide prepared from permanganate and oxalate. The air purification material can effectively decompose formaldehyde pollutants in indoor air and can rapidly and constantly remove the formaldehyde pollutants in indoor air at room temperature. The air purification material can be regenerated through heating, so that the service life of the material is prolonged and the practical application is facilitated.

Description

technical field [0001] The invention belongs to the technical field of chemical catalytic decomposition, in particular to the technical field of decomposition of formaldehyde pollutants in ambient air. Background technique [0002] Formaldehyde is the main pollutant in indoor air. It is irritating and has acute and chronic toxicity. Long-term inhalation of formaldehyde can cause inflammation of the eyes, nose and throat and may lead to nasopharyngeal cancer (Chemical Reviews. 2010, 110(6) , 2536-72). Common formaldehyde removal methods include physical adsorption, low-temperature plasma decomposition technology, catalytic combustion, plant absorption, photocatalysis, etc. However, the above methods are limited by the disadvantages of adsorption capacity, high energy consumption, high temperature, low efficiency and by-products, and the removal of formaldehyde is still a challenging problem. The invention mainly aims at decomposing low-concentration formaldehyde. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/72B01D53/96
Inventor 张彭义王金龙李金格金廷炫孙振轩热孜万古丽.玉努斯
Owner TSINGHUA UNIV
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