CN112619411B - Preparation method and application of air purification material with fiber bundles as base material - Google Patents
Preparation method and application of air purification material with fiber bundles as base material Download PDFInfo
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- CN112619411B CN112619411B CN202011468324.XA CN202011468324A CN112619411B CN 112619411 B CN112619411 B CN 112619411B CN 202011468324 A CN202011468324 A CN 202011468324A CN 112619411 B CN112619411 B CN 112619411B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/2073—Manganese
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
A preparation method and application of an air purification material with fiber bundles as a base material comprise the following steps of; a. and soaking the substrate in the metal oxide seed crystal layer precursor solution for a certain time, and drying at a certain temperature to obtain an intermediate product. b. And c, soaking the intermediate product in the step a in a mixed solution of permanganate and oxalate for a certain time, taking out, and roasting and drying at a certain temperature to obtain the air purifying material. According to the invention, the metal oxide seed crystal layer is constructed on the substrate, so that the manganese oxide porous hollow nanotube array structure is induced to grow, and the oxide seed crystal layer can firmly link the manganese oxide nano structure with the substrate, so that the problem of powder falling of the manganese oxide is effectively solved.
Description
Technical Field
The invention relates to the technical field of chemical catalytic decomposition, in particular to a preparation method and application of an air purifying material with fiber bundles as a base material.
Background
Formaldehyde is a major pollutant in indoor air, is irritating, has acute and chronic toxicity, and has a cancerogenic risk when inhaled for a long time. Common formaldehyde removing means are physical adsorption, low-temperature plasma decomposition technology, catalytic combustion, plant absorption, photocatalysis and the like. However, the above methods are limited by the disadvantages of adsorption capacity, high energy consumption, high temperature, low efficiency, byproducts, etc., and formaldehyde treatment remains a challenging problem.
Manganese oxides have catalytic activity to convert formaldehyde completely to water and carbon dioxide. However, manganese oxide still has the problems of low catalytic activity at room temperature, weak linkage with a matrix, easy powder falling and the like.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a preparation method and application of an air purification material with fiber bundles as a base material, and a metal oxide seed crystal layer is constructed on a base body to induce the growth of a manganese oxide porous hollow nanotube array structure, so that the oxide seed crystal layer can firmly link a manganese oxide nano structure with the base body, and the problem of powder dropping of manganese oxide is effectively solved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a preparation method of an air purification material taking fiber bundles as a base material comprises the following steps of;
a. and soaking the substrate in the metal oxide seed crystal layer precursor solution for a certain time, and drying at a certain temperature to obtain an intermediate product.
b. And c, soaking the intermediate product in the step a in a mixed solution of permanganate and oxalate for a certain time, taking out, and roasting and drying at a certain temperature to obtain the air purifying material.
The surface of the base material is coated with a metal oxide seed crystal layer, the thickness of the seed crystal layer is 1-1000 nm, and the metal oxide is any one of manganese oxide, tin oxide, zinc oxide, titanium oxide, aluminum oxide and the like.
The air purification material comprises a substrate, a metal oxide seed crystal layer and a manganese oxide porous nanotube array structure, wherein the metal oxide seed crystal layer is prepared from metal acetate aqueous solution, and the manganese oxide is a birnessite type manganese oxide porous nanotube array structure prepared from permanganate and oxalate.
The manganese oxide has a porous nanotube array structure, the wall thickness of the nanotube is 1-500 nm, the length of the nanotube is 0.1-10 mu m, and the porous aperture on the wall of the nanotube is 1-20 nm.
The base material is one of filter cotton, non-woven fabric and polypropylene fiber fabric with the function of filtering particulate matters.
The metal oxide seed crystal layer precursor solution is corresponding metal acetate aqueous solution, and the concentration is 0.01-100 g/L.
The soaking time of the matrix in the precursor solution is 0.1-10 h.
And d, drying the substrate impregnated in the step a at 60-100 ℃.
The soaking time in the step b is 0.1-48h, and the roasting and drying temperature is 60-300 ℃.
The air purification material has the function of decomposing VOC including formaldehyde and filtering PM particles.
The invention has the beneficial effects that:
the preparation process is simple, and the intermediate metal oxide seed crystal layer can firmly anchor the manganese oxide porous nanotube array structure on the substrate without a binder. The preparation cost is low, and noble metal is not needed as an active component.
The use is convenient, and formaldehyde in the air can be efficiently decomposed at room temperature; the wind resistance is low, and the device can be used as an active purification module. The use is safe, formaldehyde is decomposed into carbon dioxide and water, and secondary pollutants are not generated; the regeneration is easy, and when the formaldehyde decomposition activity is reduced, the regeneration can be fast, simple and convenient, and no toxic and harmful secondary pollutant is generated in the regeneration process.
The invention is mainly aimed at decomposing formaldehyde with low concentration. The manganese oxide porous hollow nanotube array structure has very high specific surface area and rich catalytic active sites, can effectively decompose formaldehyde pollution in indoor air, and can continuously and rapidly remove formaldehyde pollutants in indoor air at room temperature.
The fiber bundles such as the filter cotton, the non-woven fabric, the polypropylene fiber fabric and the like have flexibility and are foldable, and are suitable for any degradation space.
Drawings
FIG. 1 is a TEM image of a porous manganese oxide nanotube of the present invention.
Figure 2 XRD pattern of manganese oxide porous nanotubes.
FIG. 3 is a schematic diagram of the preparation process of the material of the present invention
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
Polypropylene fiber is used as a carrier, and zinc oxide is used as a seed crystal layer.
Preparing 10g/L zinc acetate solution, immersing the polypropylene fiber in the zinc acetate solution for 0.1h, and drying the polypropylene fiber at 70 ℃ to obtain the polypropylene fiber with the zinc oxide seed crystal layer coated on the surface. Preparing 5g/L potassium permanganate aqueous solution and 10g/L ammonium oxalate solution, mixing the two solutions, uniformly stirring, immersing the polypropylene fiber coated with the zinc oxide seed crystal layer on the surface in the mixed solution after the pH value of the solution reaches 7, immersing for 12 hours, and drying at 70 ℃ to obtain the air purification material.
Example 2
Polypropylene fiber is used as a carrier, and zinc oxide is used as a seed crystal layer.
Preparing 10g/L zinc acetate solution, immersing the polypropylene fiber in the zinc acetate solution for 0.2h, and drying the polypropylene fiber at 70 ℃ to obtain the polypropylene fiber with the zinc oxide seed crystal layer coated on the surface. Preparing 5g/L potassium permanganate aqueous solution and 10g/L ammonium oxalate solution, mixing the two solutions, uniformly stirring, immersing the polypropylene fiber coated with the zinc oxide seed crystal layer on the surface in the mixed solution after the pH value of the solution reaches 7, immersing for 24 hours, and drying at 70 ℃ to obtain the air purification material.
Example 3
Polypropylene fiber is used as a carrier, and manganese oxide is used as a seed crystal layer.
Preparing 5g/L manganese acetate solution, immersing the polypropylene fiber in the manganese acetate solution for 0.1h, and drying the polypropylene fiber at 70 ℃ to obtain the polypropylene fiber with the manganese oxide seed crystal layer coated on the surface. Preparing 5g/L potassium permanganate aqueous solution and 10g/L ammonium oxalate solution, mixing the two solutions, uniformly stirring, immersing the polypropylene fiber coated with the manganese oxide seed crystal layer on the surface in the mixed solution after the pH value of the solution reaches 7, immersing for 12 hours, and drying at 70 ℃ to obtain the air purification material.
Example 4
Polypropylene fiber is used as a carrier, and manganese oxide is used as a seed crystal layer.
Preparing 10g/L manganese acetate solution, immersing the polypropylene fiber in the manganese acetate solution for 0.5h, and drying the polypropylene fiber at 70 ℃ to obtain the polypropylene fiber with the manganese oxide seed crystal layer coated on the surface. Preparing 5g/L potassium permanganate aqueous solution and 10g/L ammonium oxalate solution, mixing the two solutions, uniformly stirring, immersing the polypropylene fiber coated with the manganese oxide seed crystal layer on the surface in the mixed solution after the pH value of the solution reaches 7, immersing for 24 hours, and drying at 70 ℃ to obtain the air purification material.
Example 5
Polypropylene fiber is used as a carrier, and zinc oxide is used as a seed crystal layer.
Preparing 10g/L manganese acetate solution, soaking the honeycomb ceramic in the manganese acetate solution for 0.1h, and drying the honeycomb ceramic at 60 ℃ to obtain the honeycomb ceramic with the manganese oxide seed crystal layer coated on the surface. Preparing 5g/L potassium permanganate aqueous solution and 10g/L ammonium oxalate solution, mixing the two solutions, uniformly stirring, soaking the honeycomb ceramic with the surface coated with the manganese oxide seed crystal layer in the mixed solution after the pH value of the solution reaches 7, soaking for 0.1h, and drying at 60 ℃ to obtain the air purifying material.
Example 6
Polypropylene fiber is used as a carrier, and zinc oxide is used as a seed crystal layer.
Preparing 10g/L manganese acetate solution, soaking the honeycomb ceramic in the manganese acetate solution for 10 hours, and drying the honeycomb ceramic at 100 ℃ to obtain the honeycomb ceramic with the manganese oxide seed crystal layer coated on the surface. Preparing 5g/L potassium permanganate aqueous solution and 10g/L ammonium oxalate solution, mixing the two solutions, uniformly stirring, soaking the honeycomb ceramic with the surface coated with the manganese oxide seed crystal layer in the mixed solution after the pH value of the solution reaches 7, soaking for 48 hours, and drying at 300 ℃ to obtain the air purification material.
As shown in fig. 1: mnO2 is in a tubular structure, the wall thickness of the nanotube is 1-500 nm, the surface of the nanotube contains multiple holes, and the pore diameter of the multiple holes is 1-20 nm.
As shown in fig. 2: the XRD of the invented product is completely matched with MnO2 standard card (PDFNo. 81-1947).
FIG. 3 is a schematic diagram of the preparation process of the material according to the present invention, wherein the fiber bundle substrate is soaked in the seed layer precursor solution for a certain period of time, taken out and dried, and then soaked in the permanganate solution to induce growth of MnO 2 An array of porous nanotubes.
Claims (8)
1. The preparation method of the air purification material taking the fiber bundle as the base material is characterized by comprising the following steps of;
a. soaking a substrate in a metal oxide seed crystal layer precursor solution for a certain time, and drying at a certain temperature to obtain an intermediate product;
b. c, soaking the intermediate product obtained in the step a in a permanganate and oxalate mixed solution for a certain time, taking out, and roasting and drying at a certain temperature to obtain an air purification material;
the air purification material comprises a substrate, a metal oxide seed crystal layer and a manganese oxide porous nanotube array structure, wherein the metal oxide seed crystal layer is prepared from metal acetate aqueous solution, and the manganese oxide is a birnessite type manganese oxide porous nanotube array structure prepared from permanganate and oxalate;
the wall thickness of the nano tube of the manganese oxide porous nano tube array structure is 1-500 nm, the length of the nano tube is 0.1-10 mu m, and the porous aperture on the wall of the nano tube is 1-20 nm;
the base material is a non-woven fabric with the function of filtering particulate matters.
2. The method for preparing an air purification material using fiber bundles as a base material according to claim 1, wherein a metal oxide seed crystal layer is coated on the surface of the base material, the thickness of the seed crystal layer is 1-1000 nm, and the metal oxide is any one of manganese oxide, tin oxide, zinc oxide, titanium oxide and aluminum oxide.
3. The method for producing an air cleaning material based on a fiber bundle according to claim 1, wherein the substrate is a polypropylene fiber fabric.
4. The method for preparing an air purification material using fiber bundles as a base material according to claim 1, wherein the metal oxide seed layer precursor solution is a corresponding metal acetate aqueous solution, and the concentration is 0.01-100 g/L.
5. The method for preparing an air purification material using fiber bundles as a base material according to claim 1, wherein the base material is soaked in the precursor solution for 0.1-10 hours.
6. The method for preparing an air purification material using fiber bundles as a base material according to claim 1, wherein the drying temperature of the base material after impregnation in the step a is 60-100 ℃.
7. The method for preparing an air purification material using fiber bundles as a base material according to claim 1, wherein the soaking time in the step b is 0.1-48h, and the baking and drying temperature is 60-300 ℃.
8. An air purification material obtained based on the preparation method according to any one of claims 1 to 7, characterized in that the air purification material has the functions of decomposing VOCs including formaldehyde and filtering PM particles.
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11565241B2 (en) * | 2016-09-12 | 2023-01-31 | Fuzhou University | Method for in-situ generation of nanoflower-like manganese dioxide catalyst on filter material |
| WO2018223054A1 (en) * | 2017-06-01 | 2018-12-06 | University Of Connecticut | Manganese-cobalt spinel oxide nanowire arrays |
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- 2020-12-14 CN CN202011468324.XA patent/CN112619411B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0780056A (en) * | 1993-09-14 | 1995-03-28 | Kuraray Chem Corp | Deodorizing method |
| CN104190251A (en) * | 2014-09-09 | 2014-12-10 | 清华大学 | Air purification material and preparation method and application thereof |
| CN104772109A (en) * | 2015-04-03 | 2015-07-15 | 马鞍山锐凯特新材料有限公司 | Air purifier chemical catalytic agent filter screen with firm carrying layer and preparation method of filter screen |
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