CN107983320B - Preparation method of bifunctional film for removing formaldehyde, product and application thereof - Google Patents
Preparation method of bifunctional film for removing formaldehyde, product and application thereof Download PDFInfo
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- CN107983320B CN107983320B CN201711167309.XA CN201711167309A CN107983320B CN 107983320 B CN107983320 B CN 107983320B CN 201711167309 A CN201711167309 A CN 201711167309A CN 107983320 B CN107983320 B CN 107983320B
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- 230000001588 bifunctional effect Effects 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 title abstract description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 114
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 230000003647 oxidation Effects 0.000 claims abstract description 3
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 39
- 239000000243 solution Substances 0.000 claims description 36
- 239000010408 film Substances 0.000 claims description 24
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 20
- 239000003054 catalyst Substances 0.000 claims description 19
- 238000010041 electrostatic spinning Methods 0.000 claims description 19
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 17
- 229910052748 manganese Inorganic materials 0.000 claims description 17
- 239000011572 manganese Substances 0.000 claims description 17
- 238000005303 weighing Methods 0.000 claims description 17
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 15
- 239000012286 potassium permanganate Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- -1 rare earth modified activated carbon Chemical class 0.000 claims description 12
- 229910002651 NO3 Inorganic materials 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 9
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000002121 nanofiber Substances 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 230000003197 catalytic effect Effects 0.000 claims description 2
- 238000001523 electrospinning Methods 0.000 claims description 2
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000010409 thin film Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004887 air purification Methods 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 229910052684 Cerium Inorganic materials 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 4
- 238000005034 decoration Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000000809 air pollutant Substances 0.000 description 2
- 231100001243 air pollutant Toxicity 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- OERNJTNJEZOPIA-UHFFFAOYSA-N zirconium nitrate Chemical compound [Zr+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O OERNJTNJEZOPIA-UHFFFAOYSA-N 0.000 description 2
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 206010008479 Chest Pain Diseases 0.000 description 1
- 201000004624 Dermatitis Diseases 0.000 description 1
- 206010013952 Dysphonia Diseases 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 208000010473 Hoarseness Diseases 0.000 description 1
- 208000006083 Hypokinesia Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 206010040026 Sensory disturbance Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 208000006673 asthma Diseases 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- QQZMWMKOWKGPQY-UHFFFAOYSA-N cerium(3+);trinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O QQZMWMKOWKGPQY-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- GJKFIJKSBFYMQK-UHFFFAOYSA-N lanthanum(3+);trinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GJKFIJKSBFYMQK-UHFFFAOYSA-N 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- CBRVNNFPYLQDQN-UHFFFAOYSA-N zirconium(4+) tetranitrate hexahydrate Chemical compound O.O.O.O.O.O.[N+](=O)([O-])[O-].[Zr+4].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-] CBRVNNFPYLQDQN-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- 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
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0207—Compounds of Sc, Y or Lanthanides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/32—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of manganese, technetium or rhenium
-
- B01J35/59—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4508—Gas separation or purification devices adapted for specific applications for cleaning air in buildings
Abstract
The invention relates to a preparation method of a bifunctional film for removing formaldehyde, a product and an application thereof. The film has the functions of adsorbing and catalyzing oxidation on formaldehyde, thereby achieving the effect of removing formaldehyde. The film has the advantages of simple preparation method, low raw material price, certain effect on removing formaldehyde with different concentrations, and great application prospect in the field of air purification.
Description
Technical Field
The invention belongs to the technical field of adsorption/catalysis environmental protection, and particularly relates to a preparation method of a bifunctional film for removing formaldehyde, and a product and application thereof.
Background
Formaldehyde is one of the most common and most toxic indoor air pollutants, and is mainly derived from furniture, wood panels and fillers, fabrics, coatings, wallpaper, carpets and even curtains. The formaldehyde content of the house which is newly decorated can exceed 6 times, and the formaldehyde content of the house which is newly decorated can exceed 40 times respectively. The measured data show that the release period of the indoor formaldehyde generally lasts for 3 to 15 years under the condition of normal decoration. When the formaldehyde concentration is higher than 0.08m, throat discomfort, hoarseness, chest distress, asthma, dermatitis and the like can be caused. Long-term, low-concentration formaldehyde exposure can cause symptoms such as headache, hypodynamia, sensory disturbance, immunity reduction and the like, and the world health organization determines that formaldehyde has carcinogenicity, and long-term formaldehyde exposure can increase the probability of suffering from special cancers. Today, the atmospheric environmental pollution is becoming more serious, and how to effectively remove formaldehyde in indoor air pollutants is a scientific difficult problem to be solved urgently.
At present, formaldehyde in indoor pollutants is mainly a reagent for treating formaldehyde by spraying or smearing, and formaldehyde is also removed by using the absorption action of plants, but the treatment effect is common, the determination time of the formaldehyde concentration is also manually controlled, and a person cannot accurately perceive the formaldehyde concentration when the formaldehyde concentration exceeds the standard. In recent years, the control of formaldehyde pollutants has been largely divided into two directions: one is to reduce the generation of formaldehyde pollutants from the source; another aspect is the use of air purification equipment. The method for reducing and controlling formaldehyde pollutants from the source is mainly to develop and use more environment-friendly materials, wherein the materials comprise water-based paint, environment-friendly adhesive, environment-friendly plates and the like. However, the current technology still cannot meet the market demand, and more environment-friendly materials need to be developed, so that the generation of formaldehyde pollutants is reduced.
Disclosure of Invention
Aiming at the problems of serious formaldehyde pollution in the indoor air and the like at present, the invention aims to: a method for preparing a bifunctional thin film for formaldehyde removal is provided.
Yet another object of the present invention is to: provides a product prepared by the scheme.
Yet another object of the present invention is to: provides an application of the product.
The purpose of the invention is realized by the following scheme: a preparation method of a bifunctional film for removing formaldehyde takes a rare earth modified activated carbon loaded manganese-based catalyst as an active component, adopts an electrostatic spinning method to prepare the film, and comprises the following steps:
the first step is as follows: preparation of rare earth element modified active carbon
Weighing a certain mass of activated carbon, and mixing the following raw materials: weighing a certain amount of deionized water according to the mass ratio of water =1: 1.2-1.5; according to the active carbon: weighing a certain mass of nitrate according to the mass ratio of the rare earth nitrate =1: 0.1-0.2, and dissolving the nitrate in the deionized water; ammonia water is dripped into the aqueous solution of the nitrate until the PH value is approximately equal to 8; adding the weighed active carbon into the solution, soaking at room temperature overnight, and placing the solution in a temperature range of 50-60 DEG CoC, drying in an oven overnight to obtain rare earth element modified activated carbon;
the second step is that: preparation of rare earth element modified activated carbon loaded manganese-based catalyst
Preparing 0.005mol/L potassium permanganate solution, weighing 1000ml of the prepared potassium permanganate solution, weighing 20-30 g of the rare earth element modified activated carbon prepared in the first step, adding the weighed activated carbon into the potassium permanganate solution, stirring for 1-3 h, filtering, and placing in a place of 50-60 hoCDrying in an oven overnight to obtain the rare earth element modified activated carbon loaded manganese-based catalyst;
the third step: preparation of the electrospinning solution
Dissolving polyacrylonitrile in N-N Dimethylformamide (DMF), adding the rare earth element modified activated carbon-supported manganese-based catalyst prepared in the second step, stirring vigorously for 3 hours, and then oscillating ultrasonically for 1 hour to obtain an evenly dispersed electrostatic spinning solution, wherein the mass ratio of the manganese-based catalyst to the polyacrylonitrile is 1: 12; the mass ratio of polyacrylonitrile to N-N dimethylformamide is 1: 4;
the fourth step: preparation of electrospun films
And (4) performing electrostatic spinning by using the electrostatic spinning solution obtained in the step (3) to obtain the bifunctional nanofiber membrane for removing formaldehyde.
The activated carbon is commercially available activated carbon, and the rare earth nitrate is one of cerium nitrate, lanthanum nitrate and zirconium nitrate.
The invention provides a bifunctional film for removing formaldehyde, which is prepared according to any one of the methods.
The invention provides application of a bifunctional film in formaldehyde adsorption and catalytic oxidation. The film of the invention can be used for purifying indoor formaldehyde and has a certain effect on removing particulate matters. The double-function film has multiple purposes, can be used in indoor air purification products, and can also be used in house wall decoration and furniture manufacturing processes. The film has simple preparation method, low raw material price and high practical value.
The invention adopts an electrostatic spinning method to prepare the bifunctional film for removing formaldehyde, and the film can play the roles of adsorption and catalysis for removing formaldehyde. The invention loads the adsorption/catalysis material on the macromolecule fiber, solves the problem that the catalyst is easy to fall off when being loaded on other materials, and the fiber film woven by adopting the electrostatic spinning has multiple purposes. The film can be used in air purification products, and can be applied to the aspects of house decoration wall surfaces, furniture veneering and the like. The film has the advantages of large specific surface area, high porosity, small aperture diameter and the like, and has good effect on removing formaldehyde. The film has wide application range, so the film has high practical value.
Compared with the existing catalyst, the bifunctional film for removing formaldehyde and the preparation method thereof have the following characteristics: (1) the film has the functions of adsorption and catalysis for removing formaldehyde; (2) the film has a porous structure and also has a certain effect on removing PM; (3) the film takes a rare earth element modified activated carbon loaded manganese-based catalyst as an active component, and the stability and the activity of the active component are improved by rare earth modification.
Detailed Description
Example 1
Weighing 24g of deionized water, adding 2g of cerous nitrate hexahydrate into the deionized water, dropwise adding ammonia water until the pH value is approximately equal to 8 after the cerous nitrate is completely dissolved, weighing 20g of active carbon, and dissolving the active carbon in the solutionSoaking in the solution at room temperature overnight, and standing at 50 deg.CoAnd C, drying in an oven overnight to obtain the cerium modified activated carbon.
Preparing 0.005mol/L potassium permanganate solution, measuring 1000ml of the prepared potassium permanganate solution, weighing 20g of the cerium-modified activated carbon, adding the cerium-modified activated carbon into the potassium permanganate solution, stirring for 2 hours, filtering, and placing in a 50-degree mixeroAnd C, drying in an oven overnight to obtain the cerium modified activated carbon supported manganese-based catalyst.
Dissolving 12g of polyacrylonitrile in 48g N-N Dimethylformamide (DMF), adding 1g of the cerium-modified activated carbon-supported manganese-based catalyst prepared in the second step, stirring vigorously for 3 hours, and then oscillating ultrasonically for 1 hour to obtain an electrostatic spinning solution with uniform dispersion. And (3) carrying out electrostatic spinning on the electrostatic spinning solution to obtain the bifunctional nanofiber membrane for removing formaldehyde.
Example 2
Weighing 56g of deionized water, adding 8g of zirconium nitrate hexahydrate into the deionized water, dropwise adding ammonia water until the pH value is approximately equal to 8 after cerium nitrate is completely dissolved, weighing 40g of active carbon, dissolving the active carbon into the solution, soaking the solution at room temperature overnight, and placing the solution at 60 DEGoAnd C, drying in an oven overnight to obtain the cerium modified activated carbon.
Preparing 0.005mol/L potassium permanganate solution, measuring 1000ml of the prepared potassium permanganate solution, weighing 25g of the cerium-modified activated carbon, adding the cerium-modified activated carbon into the potassium permanganate solution, stirring for 2 hours, filtering, and placing in a 60-inch containeroAnd C, drying in an oven overnight to obtain the zirconium modified activated carbon supported manganese-based catalyst.
Dissolving 12g of polyacrylonitrile in 48g N-N Dimethylformamide (DMF), adding 1g of zirconium-modified activated carbon-supported manganese-based catalyst prepared in the second step, stirring vigorously for 3 hours, and then oscillating ultrasonically for 1 hour to obtain an electrostatic spinning solution with uniform dispersion. And (3) carrying out electrostatic spinning on the electrostatic spinning solution to obtain the bifunctional nanofiber membrane for removing formaldehyde.
Example 3
Weighing 60g of deionized water, adding 4g of lanthanum nitrate hexahydrate into the deionized water, and dropwise adding ammonia water till P after cerium nitrate is completely dissolvedH is approximately equal to 8, 40g of active carbon is weighed and dissolved in the solution, the solution is dipped at room temperature overnight and placed at 60 DEGoAnd C, drying in an oven overnight to obtain the cerium modified activated carbon.
Preparing 0.005mol/L potassium permanganate solution, measuring 1000ml of the prepared potassium permanganate solution, weighing 30g of the lanthanum-modified activated carbon, adding the lanthanum-modified activated carbon into the potassium permanganate solution, stirring for 2 hours, filtering, and placing in a 60-inch containeroAnd C, drying in an oven overnight to obtain the zirconium modified activated carbon supported manganese-based catalyst.
Dissolving 12g of polyacrylonitrile in 48g N-N Dimethylformamide (DMF), adding 1g of zirconium-modified activated carbon-supported manganese-based catalyst prepared in the second step, stirring vigorously for 3 hours, and then oscillating ultrasonically for 1 hour to obtain an electrostatic spinning solution with uniform dispersion. And (3) carrying out electrostatic spinning on the electrostatic spinning solution to obtain the bifunctional nanofiber membrane for removing formaldehyde.
The present invention is not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (3)
1. A preparation method of a bifunctional film for removing formaldehyde is characterized in that the film takes a rare earth modified activated carbon loaded manganese-based catalyst as an active component, is prepared by an electrostatic spinning method, and comprises the following steps:
the first step is as follows: preparation of rare earth element modified active carbon
Weighing a certain mass of activated carbon, and mixing the following raw materials: weighing a certain amount of deionized water according to the mass ratio of water =1: 1.2-1.5; according to the active carbon: weighing a certain mass of nitrate according to the mass ratio of the rare earth nitrate =1: 0.1-0.2, and dissolving the nitrate in the deionized water; ammonia water is dripped into the aqueous solution of the nitrate until the pH value is approximately equal to 8; adding the weighed activated carbon into the solution, soaking at room temperature overnight, and drying in an oven at 50-60 ℃ overnight to obtain rare earth element modified activated carbon;
the second step is that: preparation of rare earth element modified activated carbon loaded manganese-based catalyst
Preparing 0.005mol/L potassium permanganate solution, measuring 1000mL of the prepared potassium permanganate solution, weighing 20-30 g of the rare earth element modified activated carbon prepared in the first step, adding the weighed activated carbon into the potassium permanganate solution, stirring for 1-3 h, filtering, and placing in an oven at 50-60 ℃ for overnight drying to obtain a rare earth element modified activated carbon-loaded manganese-based catalyst;
the third step: preparation of the electrospinning solution
Dissolving polyacrylonitrile in N-N Dimethylformamide (DMF), adding the rare earth element modified activated carbon-supported manganese-based catalyst prepared in the second step, stirring vigorously for 3 hours, and then oscillating ultrasonically for 1 hour to obtain an evenly dispersed electrostatic spinning solution, wherein the mass ratio of the manganese-based catalyst to the polyacrylonitrile is 1: 12; the mass ratio of polyacrylonitrile to N-N dimethylformamide is 1: 4;
the fourth step: preparation of electrospun films
Performing electrostatic spinning by using the electrostatic spinning solution obtained in the step (3) to obtain a bifunctional nanofiber membrane for removing formaldehyde;
the rare earth nitrate is one of cerium nitrate and lanthanum nitrate.
2. A bifunctional thin film for formaldehyde removal characterized by being prepared according to the method of claim 1.
3. Use of the bifunctional membrane of claim 2 for formaldehyde adsorption and catalytic oxidation.
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| CN201711167309.XA CN107983320B (en) | 2017-11-21 | 2017-11-21 | Preparation method of bifunctional film for removing formaldehyde, product and application thereof |
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| CN201711167309.XA CN107983320B (en) | 2017-11-21 | 2017-11-21 | Preparation method of bifunctional film for removing formaldehyde, product and application thereof |
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| CN107983320B true CN107983320B (en) | 2020-06-02 |
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| CN110496528A (en) * | 2018-05-16 | 2019-11-26 | 天津工业大学 | A kind of method of normal temperature oxidation formaldehyde |
| CN108797107B (en) * | 2018-05-31 | 2020-07-28 | 深圳大学 | Formaldehyde purification fiber and preparation method thereof |
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