CN113368849A - Preparation method and application of polygonal manganese dioxide nanosheet catalytic material - Google Patents
Preparation method and application of polygonal manganese dioxide nanosheet catalytic material Download PDFInfo
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- CN113368849A CN113368849A CN202110748148.3A CN202110748148A CN113368849A CN 113368849 A CN113368849 A CN 113368849A CN 202110748148 A CN202110748148 A CN 202110748148A CN 113368849 A CN113368849 A CN 113368849A
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- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 title claims abstract description 171
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 40
- 239000000463 material Substances 0.000 title claims abstract description 38
- 239000002135 nanosheet Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000243 solution Substances 0.000 claims abstract description 38
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 36
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 18
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 15
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000011259 mixed solution Substances 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 8
- 238000001354 calcination Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000001914 filtration Methods 0.000 claims abstract description 3
- 238000000227 grinding Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims abstract description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 239000002086 nanomaterial Substances 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 description 35
- 238000003421 catalytic decomposition reaction Methods 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 238000001027 hydrothermal synthesis Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 239000002055 nanoplate Substances 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000002638 heterogeneous catalyst Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002064 nanoplatelet Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/32—Manganese, technetium or rhenium
- B01J23/34—Manganese
-
- 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
- B01D53/8671—Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668
- B01D53/8675—Ozone
-
- B01J35/40—
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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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
Abstract
The invention relates to the technical field of nano materials, provides a polygonal manganese dioxide nanosheet catalytic material, and provides a preparation method of the polygonal manganese dioxide nanosheet catalytic material, wherein the side length of the catalytic material is 100-150nm, and the thickness of the catalytic material is 20-40 nm, and the preparation method comprises the following steps: s1, stirring and mixing a potassium permanganate solution, a sodium carbonate solution and ethylene glycol to obtain a mixed solution A; s2, adding a sodium hydroxide solution into the mixed solution A, and stirring until the sodium hydroxide solution is fully dispersed to obtain a mixed solution B; s3, crystallizing the mixed liquid B; s4, washing the crystallized product obtained in the S3 with ethanol and water, filtering and then drying in vacuum; and S5, calcining the dried product obtained in the step S4 at high temperature, and grinding to obtain the product. Through the technical scheme, the problems of low activity and poor catalytic performance of manganese dioxide in the prior art are solved.
Description
Technical Field
The invention relates to the field of nano materials, in particular to a preparation method and application of a polygonal manganese dioxide nanosheet catalytic material.
Background
Ozone is a greenhouse gas and causes global warming and air pollution. High-concentration tropospheric ozone can also have harmful effects on the ecosystem, such as crop reduction, vegetation protogenesis capacity reduction, and biodiversity damage, resulting in a simple ecosystem structure and reduced ecosystem resistance stability. Studies have shown that environmental pollution by ozone will affect human health, directly related to the hazards posed by ozone and PM 2.5. If the ozone is in an ozone environment for a long time, diseases of the heart and lung system and the like can be caused.
Starting in the last 70 th century, in order to reduce the pollution of ozone to the ecological environment, various researchers have developed a large number of different types of heterogeneous catalysts for decomposing ozone. At present, the reported methods for removing ozone include a thermal decomposition method, an activated carbon adsorption method, a radiation decomposition method and the like, and the methods generally have the problems of high energy consumption, secondary pollution, high cost and the like. The normal temperature catalytic decomposition is the ozone decomposition method which is acknowledged by people to have the most potential and application prospect, the key of the technology lies in the preparation of a high-performance catalyst, and the normal temperature catalytic decomposition ozone method has the advantages that: high ozone decomposing efficiency, low energy consumption, no secondary pollution, low cost, easy commercialization and the like. The catalytic decomposition mechanism of the metal oxide to ozone is complex, O3Firstly, the active site of the catalyst is adsorbed and then decomposed into a free oxygen molecule and a surface oxygen atom, and the surface oxygen atom is further mixed with another molecule of O3Two oxygen molecules are generated by the reaction and desorbed from the surface of the catalyst. Manganese oxide catalyst as a medium valenceLow cost, easy regulation of structure, no secondary pollution, high redox performance and the like, and is concerned by researchers.
However, manganese dioxide on the market at present has low purity on one hand, and has poor catalytic performance, low activity and poor stability for catalyzing and decomposing ozone on the other hand.
Disclosure of Invention
The invention provides a preparation method and application of a polygonal manganese dioxide nanosheet catalytic material, and solves the problems of low activity and poor catalytic performance of manganese dioxide in the prior art.
The technical scheme of the invention is as follows:
a polygonal manganese dioxide nanosheet catalytic material is 100-150nm in side length and 20-40 nm in thickness.
The invention also provides a preparation method of the polygonal manganese dioxide nanosheet catalytic material, which comprises the following steps:
s1, stirring and mixing a potassium permanganate solution, a sodium carbonate solution and ethylene glycol to obtain a mixed solution A;
s2, adding a sodium hydroxide solution into the mixed solution A, and stirring until the sodium hydroxide solution is fully dispersed to obtain a mixed solution B;
s3, crystallizing the mixed liquid B;
s4, washing the crystallized product obtained in the S3 with ethanol and water, filtering and then drying in vacuum;
and S5, calcining the dried product obtained in the step S4 at high temperature, and grinding to obtain the product.
As a further technical scheme, in the step S1, the concentration of the potassium permanganate solution is 1mol/L, the concentration of the sodium carbonate solution is 1mol/L, and the stirring time is controlled to be 15-30 min.
As a further technical scheme, in the step S1, the volume ratio of the potassium permanganate solution to the sodium carbonate solution is 1: (1-1.2).
According to a further technical scheme, in the step S1, the volume ratio of the potassium permanganate solution to the ethylene glycol is 1 (8-10).
In a further technical scheme, in the step S2, the concentration of the sodium hydroxide solution is 0.1mol/L, the volume ratio of the sodium hydroxide solution to the potassium permanganate solution is 1 (1-1.5), and the stirring time is controlled to be 15-20 min.
As a further technical solution, in the step S3, the crystallization specifically includes: and heating the mixed solution B to 180-200 ℃, and controlling the time to be 12-14 h.
As a further technical scheme, in the step S4, the vacuum drying temperature is 80-90 ℃, and the time is controlled within 10-12 h.
As a further technical scheme, in the step S5, the calcining temperature is 500-540 ℃, and the time is controlled within 5-6 h.
The invention also provides an application of the polygonal manganese dioxide nanosheet catalytic material in ozone washing and removing.
The invention has the beneficial effects that:
1. polygonal manganese dioxide (MnO) of the present invention2) The nano-sheet catalytic material has high-performance ozone catalytic decomposition capability, so that the nano-sheet catalytic material can be used as an ozone washing and removing catalytic material and applied to environmental ozone treatment and environmental ozone monitoring instruments. Manganese dioxide (MnO)2) The catalyst has strong surface chemical adsorption capacity and multiple valence-change forms, is easy to generate active sites on the surface of the catalyst, and low coordination species at the edges, corners and other positions of the surface of the catalyst are active centers of catalytic reaction2) Appearance and particle size of the catalyst, increase of exposed area of edge and corner of surface of the catalyst and increase of manganese dioxide (MnO)2) Catalytic decomposition of ozone activity. The method comprises the steps of preparing polygonal manganese dioxide nanosheets by a hydrothermal method, adding manganese dioxide precursor gel into an autoclave according to the proportion of the invention, heating, raising the pressure of a hydrothermal reaction system, enabling solute to be saturated in a solution, washing out the manganese dioxide precursor from the solution in a crystalline state, and rearranging crystal grains to form the special polygonal manganese dioxide.
2. The catalyst of the invention is calcined at 500 ℃ to prepare flaky manganese dioxide (MnO)2) A catalyst. The catalyst is a nano-sheet with approximate hexagonal shape, the side length is 100-150nm, the thickness is 20-40 nm, and manganese dioxide (MnO) is ground2) The shape of the manganese dioxide nano-plate is not changed, which shows that the catalyst prepared by the invention has stable structure and the purity of the manganese dioxide nano-plate prepared by the invention is higher. The invention prepares polygonal manganese dioxide (MnO)2) The nano sheet material has the characteristics of simple method, high catalytic performance, low cost, recycling, low cost, no secondary pollution and the like, and meets the basic requirements of commercialization when being used as an ozone removal catalyst material.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 shows polygonal manganese dioxide (MnO) obtained in example 12) Scanning electron microscope photographs of the nanosheet catalyst;
FIG. 2 shows polygonal manganese dioxide (MnO) of example 12) An X-ray diffraction pattern of the nanosheet material;
FIG. 3 shows polygonal manganese dioxide (MnO) of example 12) Nanosheet catalytic material and conventional manganese dioxide (MnO)2) The activity spectrogram of the catalytic material for decomposing ozone at normal temperature.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.
Example 1
The invention prepares the polygonal manganese dioxide (MnO2) nanosheet catalytic material by a hydrothermal synthesis method.
Firstly, 5ml of potassium permanganate solution (1mol/L) and 5ml of Na2CO3Pouring 40ml of ethylene glycol into the solution (1mol/L), uniformly mixing, stirring for 15-30min by magnetic stirring, then adding 5ml of NaOH (0.1mol/L) solution into the solution, and stirring for 15min to fully disperse the NaOH solution. Then the obtained solution is transferred into a 100ml crystallization kettle, and the crystallization kettle is put into an oven for crystallization at 180 ℃ for 12 hours. Finally, the obtained product is processedFiltering, washing with ethanol and distilled water for several times, vacuum drying at 80 deg.C for 12 hr, removing dried sample, calcining at 500 deg.C for 5 hr, and calcining manganese dioxide (MnO)2) The catalyst was ground to a powder.
The structure of the polygonal manganese dioxide (MnO2) nanosheet material prepared by the method is characterized by a field emission Scanning Electron Microscope (SEM), a Transmission Electron Microscope (TEM) and X-ray diffraction (XRD).
FIG. 1 shows polygonal manganese dioxide (MnO)2) Scanning electron microscope photographs of the nanosheet catalyst. It is clear from the SEM photograph that the catalyst was calcined at 500 ℃ to prepare manganese dioxide (MnO) in the form of flakes2) A catalyst. The catalyst is a nano-sheet with approximate hexagonal shape, the side length is 100-150nm, the thickness is 20-40 nm, and manganese dioxide (MnO) is ground2) The morphology of the catalyst is not changed, which shows that the catalyst prepared by the invention has stable structure.
FIG. 2 shows polygonal manganese dioxide (MnO) prepared according to the present invention2) X-ray diffraction pattern (XRD) of the nanoplatelets material. From FIG. 2, it can be seen that all diffraction peak positions and MnO2The peak positions of the standard spectra are consistent, other miscellaneous peaks are not generated, and the manganese dioxide (MnO) prepared by the method is shown2) The purity of the nano-sheet is very high.
FIG. 3 shows polygonal manganese dioxide (MnO)2) Nanosheet catalytic material and conventional manganese dioxide (MnO)2) The data shows that the polygonal manganese dioxide catalyst has high activity and strong stability.
Polygonal manganese dioxide (MnO) prepared by the present invention was evaluated by its ability to catalytically decompose ozone at normal temperature2) The catalyst has the performance that ozone is generated by an ozone generator, and air containing 500ppb, 300ppb and 100ppb of ozone is introduced into polygonal manganese dioxide (MnO) loaded with the catalyst prepared by the invention at normal temperature2) In the ozone scrubber of the catalyst, the catalytic performance of the catalyst is judged by detecting the ozone content of the reacted gas through an ozone detector, and the lower the ozone concentration detected by the ozone detector is, the lower the catalytic performance isPolygonal manganese dioxide (MnO) prepared by the invention2) The better the catalyst performance, and the longer the high activity catalyst lasts to determine the polygonal manganese dioxide (MnO) prepared by the invention2) The longer the activity stability, high activity duration, of the catalyst indicates the higher the catalyst stability.
Experiments show that the polygonal manganese dioxide (MnO) prepared by the invention2) The capacity of the nanosheet catalyst for decomposing ozone reaches 99.9%, and the prepared catalyst is applied to an ozone scrubber, so that the activity can be maintained for 1-2 years, and the stability is high. Illustrating polygonal manganese dioxide (MnO)2) The nanosheet catalyst has a high-performance ability to catalytically decompose ozone.
In summary, the polygonal manganese dioxide (MnO) prepared by the present invention2) The nano-sheet catalytic material shows higher capability of catalyzing and decomposing ozone, so that the nano-sheet catalytic material can be applied to the process of washing and removing ozone at normal temperature. In addition, the invention prepares polygonal manganese dioxide (MnO)2) The nano-sheet catalytic material has the advantages of simple method, high catalytic performance, low cost, recycling and no secondary pollution, and meets the basic requirements of commercialization when used as an ozone removal catalyst.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The polygonal manganese dioxide nanosheet catalytic material is characterized in that the side length of the catalytic material is 100-150nm, and the thickness of the catalytic material is 20-40 nm.
2. The preparation method of the polygonal manganese dioxide nanosheet catalytic material is characterized by comprising the following steps of:
s1, stirring and mixing a potassium permanganate solution, a sodium carbonate solution and ethylene glycol to obtain a mixed solution A;
s2, adding a sodium hydroxide solution into the mixed solution A, and stirring until the sodium hydroxide solution is fully dispersed to obtain a mixed solution B;
s3, crystallizing the mixed liquid B;
s4, washing the crystallized product obtained in the S3 with ethanol and water, filtering and then drying in vacuum;
and S5, calcining the dried product obtained in the step S4 at high temperature, and grinding to obtain the product.
3. The preparation method of the polygonal manganese dioxide nanosheet catalytic material according to claim 2, wherein in the step S1, the concentration of the potassium permanganate solution is 1mol/L, the concentration of the sodium carbonate solution is 1mol/L, and the stirring time is controlled to be 15-30 min.
4. The method for preparing a polygonal manganese dioxide nanosheet catalytic material according to claim 3, wherein in step S1, the volume ratio of the potassium permanganate solution to the sodium carbonate solution is 1: (1-1.2).
5. The preparation method of the polygonal manganese dioxide nanosheet catalytic material according to claim 3, wherein in the step S1, the volume ratio of the potassium permanganate solution to the ethylene glycol is 1 (8-10).
6. The preparation method of the polygonal manganese dioxide nanosheet catalytic material according to claim 2, wherein in the step S2, the concentration of the sodium hydroxide solution is 0.1mol/L, the volume ratio of the sodium hydroxide solution to the potassium permanganate solution is 1 (1-1.5), and the stirring time is controlled to be 15-20 min.
7. The method for preparing a polygonal manganese dioxide nanosheet catalytic material according to claim 2, wherein in step S3, the crystallizing specifically is: and heating the mixed solution B to 180-200 ℃, and controlling the time to be 12-14 h.
8. The preparation method of the polygonal manganese dioxide nanosheet catalytic material according to claim 2, wherein in the step S4, the vacuum drying temperature is 80-90 ℃ and the time is controlled within 10-12 h.
9. The preparation method of the polygonal manganese dioxide nanosheet catalytic material according to claim 2, wherein in the step S5, the calcining temperature is 500-540 ℃ and the time is controlled within 5-6 h.
10. An application of polygonal manganese dioxide nanosheet catalytic material in ozone washing and removing.
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| US20190284061A1 (en) * | 2018-03-09 | 2019-09-19 | Washington University | Photochemically-assisted synthesis of layered birnessite (mno2) nanosheets |
| CN110732323A (en) * | 2019-10-24 | 2020-01-31 | 黑龙江科技大学 | α -MnO for catalyzing oxidation of volatile organic compounds2Process for preparing catalyst |
| CN112844430A (en) * | 2019-11-27 | 2021-05-28 | 清华大学 | Ozone decomposition catalyst and preparation method and application thereof |
| CN111533171A (en) * | 2020-04-07 | 2020-08-14 | 华侨大学 | Simple calcination method for preparing porous MnO2Method (2) |
| CN112516980A (en) * | 2020-12-28 | 2021-03-19 | 福州大学 | Preparation method of two-dimensional porous titanium dioxide nanosheet |
| CN112551590A (en) * | 2021-01-21 | 2021-03-26 | 福州大学 | Synthesis of porous manganese dioxide and desulfurization application thereof |
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