Manganese-oxygen compound three-dimensional porous material for removing formaldehyde and preparation method thereof

A manganese oxide compound and three-dimensional porous technology, which is applied in the field of formaldehyde removal materials and its preparation, can solve the problems of restricting the promotion and application of formaldehyde removal, immature titanium dioxide technology, and slow metabolism of plants at night, achieving high formaldehyde removal activity and forming The effect of low difficulty and high application value

Inactive Publication Date: 2020-09-18
南京尚易环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plant absorption method mainly degrades formaldehyde through plant metabolism. Due to the low efficiency and the slow metabolism of plants at night, it can only be used as an auxiliary means, and the ornamental effect is far greater than the governance effect.
The chemical reaction method mainly includes the direct reaction method and the catalytic reaction method. The direct reaction method mainly degrades formaldehyde through the direct reaction of effective components with formaldehyde, including gas catalysts, some aldehydes and amines with active sites, etc. Formaldehyde may introduce other pollutants at the same time; the catalytic reaction method degrades formaldehyde through the catalytic reaction of the catalyst without introducing other substances, mainly including photocatalysis and noble metal catalysis. The photocatalysis method needs to be carried out under ultraviolet light conditions, which has considerable Limitations of use, and immature titanium dioxide technology will cause indoor dust pollution; noble metal catalysts are prone to self-poisoning, which makes the catalyst invalid, and due to the high price of precious metals, it limits its promotion and application in household indoor formaldehyde removal.
Therefore, existing methods for removing formaldehyde have certain limitations.

Method used

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  • Manganese-oxygen compound three-dimensional porous material for removing formaldehyde and preparation method thereof
  • Manganese-oxygen compound three-dimensional porous material for removing formaldehyde and preparation method thereof
  • Manganese-oxygen compound three-dimensional porous material for removing formaldehyde and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Dissolve 2 parts of NaOH into 100 parts of pure water, stir until completely dissolved, add 3 parts of KMnO 4 Continue stirring until completely dissolved to obtain a mixed solution A; 4 parts of MnSO 4 Dissolve in 100 parts of pure water, heat to 60°C after complete dissolution, add solution A dropwise to MnSO under stirring condition 4 The solution was stirred and maintained at 60°C for 3h to obtain mixture B.

[0030] (2) Take 100 parts of mixture B and age at room temperature for 24 hours, add 10 parts of large-grain bamboo fibers into mixture B, wherein the length of large-grain bamboo fibers is 0.1-0.3 mm; stir for 20 minutes to obtain mixture C; then add 0.5 parts Sodium alginate was added to 20 parts of pure water to dissolve completely, added to mixture C, and stirred completely to obtain mixture D. Mixture D was slowly added dropwise to 10% CaCl 2 The solution was aged for 10 minutes and then taken out to obtain gel beads E.

[0031] (3) Gel beads E we...

Embodiment 2

[0036] (1) Dissolve 2.2 parts of NaOH into 100 parts of pure water, stir until completely dissolved, add 3.8 parts of NaMnO 4 Continue stirring until completely dissolved to obtain mixed solution A; 5.2 parts of MnSO 4 Dissolve in 100 parts of pure water, completely dissolve at room temperature and heat to 25°C, add solution A dropwise to MnSO under stirring condition 4 The solution was stirred and maintained at 25°C for 2h to obtain mixture B.

[0037] (2) Take 100 parts of mixture B and age at room temperature for 12 hours, add 10 parts of large-grain bamboo fibers into mixture B, wherein the length of large-grain bamboo fibers is 0.5-1.0 mm; stir for 20 minutes to obtain mixture C; then add 0.8 parts Sodium alginate was added to 20 parts of pure water to dissolve completely, added to mixture C, and stirred completely to obtain mixture D. Mixture D was slowly added dropwise to 10% CaCl2 solution, aged for 30 minutes and then taken out to obtain gel beads E.

[0038] (3) G...

Embodiment 3

[0042] (1) Dissolve 2.8 parts of KOH into 150 parts of pure water, stir until completely dissolved, add 3.3 parts of NaMnO 4 Continue stirring until completely dissolved to obtain mixed solution A; 4.5 parts of MnCl 2 Dissolve in 150 parts of pure water, heat to 50°C after complete dissolution, add solution A dropwise to MnCl under stirring condition 2 The solution was stirred and maintained at 50°C for 0.5h to obtain mixture B.

[0043] (2) Take 100 parts of mixture B and age at room temperature for 20 hours, add 15 parts of large-grain bamboo fibers into mixture B, wherein the length of large-grain bamboo fibers is 0.3-0.5 mm, stir for 40 minutes, and obtain mixture C; Sodium alginate was added to 20 parts of pure water to dissolve completely, added to mixture C, and stirred completely to obtain mixture D. Mixture D was slowly added dropwise to 20% CaCl 2 The solution was aged for 60 minutes and then taken out to obtain gel beads E. The specific raw materials and effect ...

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Abstract

The invention discloses a manganese-oxygen compound three-dimensional porous material for removing formaldehyde and a preparation method thereof. The three-dimensional porous material comprises a manganese-oxygen compound and plant fibers, the manganese-oxygen compound is loaded on the plant fibers, and the plant fibers are crosslinked to form the manganese-oxygen compound three-dimensional porousspherical material. The preparation method of the porous material comprises the following steps: preparing a manganese-oxygen compound through a neutral reaction, then adding large-particle bamboo fibers into the manganese-oxygen compound, fully stirring and mixing, aging by a gel method, washing and freeze-drying to obtain the spherical material. The prepared spherical material has high porosityand high formaldehyde removal activity, and can be used for indoor formaldehyde pollution treatment.

Description

technical field [0001] The invention relates to a formaldehyde-removing material and a preparation method thereof, in particular to a formaldehyde-removing manganese oxide three-dimensional porous material and a preparation method thereof. Background technique [0002] Formaldehyde is a type of carcinogen. In today's society, more and more people talk about "aldehyde". There are more than 500 kinds of indoor air pollutants, among which formaldehyde is the most important typical pollutant, which is very harmful to human health. Studies have shown that short-term exposure to formaldehyde can irritate the eyes, nasal cavity and respiratory tract and cause allergic reactions. Long-term exposure to low-dose Formaldehyde easily increases the possibility of nasopharyngeal cancer, leukemia and death. People spend 80%-90% of their lives indoors, and the quality of indoor air directly affects human health. In order to protect human health, prevent and control indoor air pollution, C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/02B01J20/30B01D53/02
CPCB01J20/24B01J20/0222B01D53/02B01D2257/70
Inventor 陈毛毛孙丽媛
Owner 南京尚易环保科技有限公司
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