Room-temperature air purification non-photo-catalyst and preparation method thereof

A technology of air purification and catalyst, which is applied in the field of air purification, can solve the problems of high replacement cost and short service life, and achieve the effects of low cost, simple use conditions and energy saving

Inactive Publication Date: 2015-07-22
MAANSHAN RECATAL NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, various air purifiers mainly use strong adsorption porous materials to physically adsorb organic pollutants and photocatalytic materials to decompose organic pollutants; physical adsorption materials Although it can absorb a lot of bacteria and dust, its service life is short and needs to be replaced frequently, resulting in high replacement costs; nano-photocatalytic materials mainly use nano-TiO2 as a photocatalyst, but it requires high The irradiation of high-intensity ultraviolet light requires a specific excitation light source (patent number ZL98115808.0); there are also reports on catalysts for non-photocatalytic oxidation of organic pollutants at room temperature (ZL2004100479737), which need to be loaded with 0.5-1% of precious metals, and the participation of precious metals is large The cost of the catalyst is greatly increased, which is not conducive to its wide application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a room temperature non-light air purification catalyst, which only contains nanometer MnO 2 Particle, particle diameter is 50nm, and its preparation method is:

[0033] 300ml concentration of 0.02M MnSO 4 The solution was placed on a magnetic stirrer, and 200ml of KMnO with a concentration of 0.02M was added dropwise under rapid stirring at 1250r / min. 4 solution, stirred rapidly for a period of time, and the resulting slurry was filtered and dried in air at 120°C for 12 hours to obtain nano-MnO 2 grains, that is, the room temperature non-light air purification catalyst is obtained;

[0034] In actual use, 20.65 mg of the above-mentioned catalyst is placed in a reactor. At room temperature, the conversion rate of formaldehyde is 100%, and the duration is 6 hours; with the prolongation of catalytic oxidation time, the removal of formaldehyde by nano-manganese dioxide After 10 hours of reaction, the removal rate of formaldehyde by nano-manganese...

Embodiment 2

[0036] This embodiment provides a room temperature non-light air purification catalyst, which only contains nanometer MnO 2 Particle, particle diameter is 35nm, and its preparation method is:

[0037] 0.5ml concentration of 4M sulfuric acid was added dropwise to 100ml concentration of 0.02M Ba(MnO 4 ) 2 In the aqueous solution, stir at 1200r / min for 10min at room temperature, then add the solution generated by the above reaction dropwise into 300ml of MnSO with a concentration of 0.02M 4 ·H 2 O aqueous solution, stirred rapidly for a period of time, the resulting slurry was filtered and washed, and then dried in air at 120°C for 12 hours to obtain nano-MnO 2 grains, that is, the room temperature non-light air purification catalyst is obtained;

[0038] In actual use, take 20.57mg of the above-mentioned catalyst and put it in the reactor. At room temperature, the conversion rate of formaldehyde is 100%, and the duration is 5 hours; After 9 hours of reaction, the removal ra...

Embodiment 3

[0040] Present embodiment provides a kind of room temperature non-light air purification catalyst, comprises 98.43% nanometer MnO in this catalyst 2 Granular and 1.57% silver oxide, nano MnO 2 The particle diameter of particle is 30nm, and its preparation method is:

[0041] 6ml of 0.02M AgNO 3 with 800ml of NaMnO with a concentration of 0.005M 4 The solution was mixed, and then 300ml concentration of 0.02M MnSO 4 The solution was placed on a magnetic stirrer, and the above mixed solution was added dropwise under rapid stirring at 1300r / min, and stirred rapidly for a period of time. After the resulting slurry was filtered through water, the resulting precipitate was washed with distilled water and absolute ethanol, and vacuum filtered repeatedly until the filtrate was free of water. color, placed in a drying oven, and dried at 125°C for 10 hours to obtain silver-modified nano-MnO 2 Particles, that is, a room temperature non-light air purification catalyst;

[0042] In actua...

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Abstract

The invention discloses a room-temperature air purification non-photo-catalyst. The catalyst comprises components in percentage by weight as follows: 0-5% of a transitional element oxide, 0-10% of a rare-earth element oxide and the balance of nano MnO2, wherein the transitional element oxide comprises a silver oxide, a zinc oxide or a copper oxide, and the rare-earth element oxide comprises a lanthanum oxide, a cerium oxide, a praseodymium oxide or a neodymium oxide. The invention further designs a preparation method of the room-temperature air purification non-photo-catalyst. According to the room-temperature air purification non-photo-catalyst and the preparation method thereof, usage conditions are simple, and no electric power, heating power or light source is required, so that resources are saved; organic pollutants can be effectively catalyzed under the room temperature condition to generate harmless carbon dioxide and water; the conversion rate of the organic pollutants can be up to 100% within the effective working time interval.

Description

technical field [0001] The invention relates to the field of air purification, in particular to a room temperature non-light air purification catalyst and a preparation method thereof. Background technique [0002] The odor of newly renovated houses, purchased new cars, and increasingly prominent environmental pollution have brought harm to people's bodies and lives. Among them, organic pollutants are one of the main substances of industrial pollution and indoor air pollution. The removal of organic pollutants has become an important issue in the field of environmental protection. [0003] At present, various air purifiers mainly use strong adsorption porous materials to physically adsorb organic pollutants and photocatalytic materials to decompose organic pollutants; although physical adsorption materials can absorb many bacteria and dust, their service life is short. Frequent replacement is required, resulting in high replacement costs; nano-photocatalytic materials are m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/68B01J23/889B01D53/86B01D53/72
Inventor 姜瑞霞袁有红
Owner MAANSHAN RECATAL NEW MATERIAL CO LTD
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