CN111686800A - Catalyst for air purification and preparation method thereof - Google Patents
Catalyst for air purification and preparation method thereof Download PDFInfo
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- CN111686800A CN111686800A CN202010633216.7A CN202010633216A CN111686800A CN 111686800 A CN111686800 A CN 111686800A CN 202010633216 A CN202010633216 A CN 202010633216A CN 111686800 A CN111686800 A CN 111686800A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 238000004887 air purification Methods 0.000 title claims description 17
- 239000002131 composite material Substances 0.000 claims abstract description 62
- 239000011572 manganese Substances 0.000 claims abstract description 42
- 239000007787 solid Substances 0.000 claims abstract description 41
- 239000002608 ionic liquid Substances 0.000 claims abstract description 37
- MZZUATUOLXMCEY-UHFFFAOYSA-N cobalt manganese Chemical compound [Mn].[Co] MZZUATUOLXMCEY-UHFFFAOYSA-N 0.000 claims abstract description 36
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910001868 water Inorganic materials 0.000 claims abstract description 12
- 238000011068 loading method Methods 0.000 claims abstract description 10
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 7
- 239000002243 precursor Substances 0.000 claims abstract description 7
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 52
- 229940071125 manganese acetate Drugs 0.000 claims description 47
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 claims description 47
- 239000000203 mixture Substances 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 33
- 238000001035 drying Methods 0.000 claims description 33
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 claims description 32
- 239000000243 solution Substances 0.000 claims description 31
- 229940044175 cobalt sulfate Drugs 0.000 claims description 30
- 229910000361 cobalt sulfate Inorganic materials 0.000 claims description 30
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 claims description 30
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 25
- FSSPGSAQUIYDCN-UHFFFAOYSA-N 1,3-Propane sultone Chemical compound O=S1(=O)CCCO1 FSSPGSAQUIYDCN-UHFFFAOYSA-N 0.000 claims description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- IYDGMDWEHDFVQI-UHFFFAOYSA-N phosphoric acid;trioxotungsten Chemical compound O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.OP(O)(O)=O IYDGMDWEHDFVQI-UHFFFAOYSA-N 0.000 claims description 17
- 238000005406 washing Methods 0.000 claims description 17
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 14
- 235000019253 formic acid Nutrition 0.000 claims description 14
- 229910052697 platinum Inorganic materials 0.000 claims description 14
- 239000011541 reaction mixture Substances 0.000 claims description 13
- MCTWTZJPVLRJOU-UHFFFAOYSA-N 1-methyl-1H-imidazole Chemical compound CN1C=CN=C1 MCTWTZJPVLRJOU-UHFFFAOYSA-N 0.000 claims description 12
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 12
- 239000004202 carbamide Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 6
- 239000012265 solid product Substances 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 claims description 5
- 229910000510 noble metal Inorganic materials 0.000 claims description 4
- 239000012212 insulator Substances 0.000 claims description 2
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 abstract description 78
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 4
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 description 10
- 239000007789 gas Substances 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000012855 volatile organic compound Substances 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 238000007084 catalytic combustion reaction Methods 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011964 heteropoly acid Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003905 indoor air pollution Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 moisture Substances 0.000 description 1
- 150000002892 organic cations Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005180 public health Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 229910000033 sodium borohydride Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0277—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature
- B01J31/0278—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre
- B01J31/0281—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre the nitrogen being a ring member
- B01J31/0284—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre the nitrogen being a ring member of an aromatic ring, e.g. pyridinium
-
- 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
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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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J27/188—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum, tungsten or polonium
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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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0277—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature
- B01J31/0278—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre
- B01J31/0285—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre also containing elements or functional groups covered by B01J31/0201 - B01J31/0274
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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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0277—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature
- B01J31/0292—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature immobilised on a substrate
- B01J31/0294—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature immobilised on a substrate by polar or ionic interaction with the substrate, e.g. glass
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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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0277—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature
- B01J31/0298—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature the ionic liquids being characterised by the counter-anions
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- B01J35/391—
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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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/341—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
- B01J37/344—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of electromagnetic wave energy
- B01J37/345—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of electromagnetic wave energy of ultraviolet wave energy
Abstract
The invention discloses a catalyst with the mass fraction of Pt of 1.0-3.0 wt% obtained by combining manganese-cobalt composite oxide and manganese-based solid ionic liquid as a carrier through the preparation of the manganese-cobalt composite oxide, the synthesis of an ionic liquid precursor MIMPS, the preparation of the manganese-cobalt composite oxide and manganese-based solid ionic liquid composite carrier and the loading of an active component Pt, wherein the manganese-based solid ionic liquid is Mn [ MIMPS ]]PW12O40、Mn0.5[MIMPS]2PW12O40、Mn0.5[MIMPS]HPW12O40One kind of (1). The active components of the catalyst prepared by the invention are highly dispersed on the carrier, and the catalyst can completely catalyze and convert toluene into carbon dioxide and water at relatively low temperature.
Description
Technical Field
The invention belongs to the technical field of environmental protection, relates to a technology for purifying toluene in air, and particularly relates to a catalyst for air purification and a preparation method thereof.
Background
Indoor is one of the most frequent and close environments for people to contact, and the quality of the indoor environment directly influences the health of people. The united states environmental protection agency has classified indoor air pollution as one of five environmental factors that endanger public health. The volatile organic compounds are important components of indoor air pollutants and have the characteristics of diversity, potential, comprehensiveness, universality, accumulation and the like. Sources of VOCs in indoor air can be divided into indoor sources and outdoor sources, wherein the outdoor sources mainly come from petrochemical industry and other industrial emissions, fuel combustion and automobile exhaust; the indoor sources are mainly building and finishing materials. At present, indoor air quality in China is worried, and especially indoor pollution represented by formaldehyde and toluene is serious.
China stipulates the highest allowable emission standard of various common volatile organic compounds, and meanwhile, in order to realize environmental protection and sustainable development, the removal of VOCs becomes a research hotspot. At present, the control approach of indoor VOCs mainly comprises pollution source control and terminal treatment. The use of green building materials is an effective way to reduce or even eliminate pollution sources from the source, but the standard system of the green building materials is still not perfect at present, and the production cost of the green building materials is higher, so that the problem cannot be directly solved in a short time. Windowing ventilation is another effective way for controlling pollution sources, but in recent years, outdoor air quality is not satisfactory, and the outdoor air becomes one of indoor pollution sources. Toluene is the most representative group of VOCs, and the existing end treatment techniques thereof include adsorption, absorption, catalytic combustion, biological treatment, and photocatalytic oxidation. Wherein the catalytic combustion method is to perform catalytic oxidation of toluene to CO at a lower temperature on a catalyst2And H2O, it has the advantages of low reaction temperature, low energy consumption, high efficiency and no secondary pollution, and the core of the technology is the catalyst.
Patent CN105817236B discloses a Pt/Sn carrier using copper-tin composite oxide with mesoporous structure as carrier and loading active component Pt by using impregnation methodxCuyOzCatalyst capable of completely catalytically oxidizing toluene to CO at 200 DEG C2. Patent CN104678810A discloses a catalyst with rod-like nano-ceria as a carrier and noble metal palladium as an active component, which has a toluene conversion rate of 80% or more at 230 ℃. Therefore, the development of a novel toluene catalytic oxidation catalyst with excellent reaction activity has important practical significance for further improving the moisture resistance while keeping higher toluene conversion rate under low temperature conditions.
Disclosure of Invention
In order to solve the problems of higher reaction temperature and poor moisture resistance of toluene catalytic oxidation removal, the invention discloses a catalyst for catalytic purification of toluene at low temperature, which takes manganese-cobalt composite oxide and manganese-based solid ionic liquid as a carrier and precious metal Pt as an active component, wherein the active component of the catalyst is highly dispersed on the carrier, and the catalyst can completely catalyze and convert toluene into carbon dioxide and water at relatively low temperature.
The invention is realized by the following technical scheme:
on one hand, the invention discloses a catalyst for air purification, which takes manganese-cobalt composite oxide and manganese-based solid ionic liquid as a composite carrier, takes noble metal Pt as an active component, and takes Mn [ MIMPS ] as the manganese-based solid ionic liquid]PW12O40、Mn0.5[MIMPS]2PW12O40、Mn0.5[MIMPS]HPW12O40The mass fraction of Pt in the catalyst is 2.0-5.0 wt%; the means for loading the active component Pt is a photochemical deposition method.
On the other hand, the invention also discloses a preparation method of the catalyst for air purification, which is realized by the following specific steps:
(1) preparation of manganese cobalt composite oxide
Mixing and stirring a manganese acetate solution and a cobalt sulfate solution at room temperature for 10-20 min, then adding urea and CTAB, continuously stirring for 30min, reacting the obtained mixed solution at 80-90 ℃ for 12-24 h, centrifuging, washing and drying the obtained product, and roasting at 350-450 ℃ for 3-6 h; the mass ratio of the manganese acetate to the cobalt sulfate is 1: 3-3: 1, the addition amount of the urea is 10-20 times of the total mass of the manganese acetate and the cobalt sulfate, and the addition amount of CTAB is 2-5 wt% of the total weight of the manganese acetate and the cobalt sulfate; the mass concentration of the manganese acetate solution is 0.1-0.3 mol/L, and the mass concentration of the cobalt sulfate solution is 0.1-0.3 mol/L;
(2) synthesis of ionic liquid precursor MIMPS
Adding 1, 3-propane sultone and p-xylene into an ultrasonic reactor, and introducing N into the ultrasonic reactor after completely dissolving21 to 2 hours later, and then the super-open is carried outThe power of the acoustic reactor is kept at 200-300W, N-methylimidazole is dripped into the ultrasonic reaction at the speed of 10-20 drops/min through a constant-pressure dropping funnel, the reaction is continued for 4-6 hours after the dripping is finished to obtain a milky reaction mixture, the reaction mixture is centrifuged, the obtained white precipitate is washed three times with ethyl acetate and dried at 70-90 ℃ for 4-6 hours, and the obtained white powder solid is MIMPS; further, the mass concentration of the 1, 3-propane sultone in p-xylene was 0.5moL/L, and the mass ratio of 1, 3-propane sultone to N-methylimidazole was 1: 1; n is a radical of2The flow rate of (a) is 20-50 mL/min;
(3) preparation of manganese-cobalt composite oxide and manganese-based solid ionic liquid composite carrier
Adding manganese-cobalt composite oxide, phosphotungstic acid, manganese acetate and MIMPS (metal insulator semiconductor) into deionized water to obtain a mixture, stirring at room temperature for 20 min, transferring the mixture into an ultrasonic reactor to react for 3-6 h at 200-400W, centrifuging the mixture after the reaction is finished, drying the obtained solid product at 70-90 ℃ for 6-8 h, and obtaining the solid, namely the composite carrier of the manganese-cobalt composite oxide and the manganese-based solid ionic liquid; wherein, phosphotungstic acid, manganese acetate and MIMPS react in the ultrasonic reactor again to obtain manganese-based solid ionic liquid; the mass concentration of the manganese-cobalt composite oxide in the mixture is 10-30 g/100 mL; the molar ratio of phosphotungstic acid, MIMPS and manganese acetate is 1.0 (1.0-2.0) to 0.5-1.0; the molar concentration of MIMPS in the mixture is 0.15 mol/L;
(4) active component Pt loading
Sequentially adding a chloroplatinic acid solution, the composite carrier prepared in the step (3) and formic acid into a three-neck flask, then introducing nitrogen into the three-neck flask to expel oxygen in the three-neck flask, stirring the obtained mixture for 4-8 hours under the irradiation of 300W ultraviolet light, and then sequentially centrifuging, washing and drying to obtain a catalyst with the Pt content of 1.0-3.0 wt%; further, the mass concentration of the platinum is 50mg/L, the mass ratio of the platinum to the composite carrier is (1-3): (97-99), the volume ratio of formic acid to water is kept at 1:20, and the drying is carried out for 5-10 h at the temperature of 100-130 ℃.
Compared with the prior art, the invention has the following beneficial effects.
1) According to the invention, metal cations and organic cations are doped and are jointly used as counter ions of heteropoly acid radicals, so that Lewis acidity is successfully introduced into the cation part of the hybrid material, and the inorganic-organic hybrid heteropoly acid functionalized ionic liquid catalyst with Br nano-Lewis dual acidity is prepared. The method for introducing Lewis acidity effectively avoids water instability, thereby providing good guarantee for the complete conversion reaction of toluene under higher humidity.
2) The unique microenvironment formed by the manganese-based solid ionic liquid on the surface of the catalyst can effectively avoid reverse reaction
Impurities such as moisture, dust and the like in the air inhibit the catalytic activity in the reaction process, and active components can be kept from losing easily, so that the service life of the catalyst is prolonged; in addition, the existence of the manganese-based solid ionic liquid can strengthen the synergistic effect between the manganese-cobalt composite oxide and Pt, so that toluene can be completely catalytically converted into carbon dioxide and water at a lower temperature.
3) The composite carrier composed of the manganese-based solid ionic liquid and the manganese-cobalt composite oxide can highly disperse the active components, and can effectively shorten the diffusion path in the reaction process, thereby promoting the toluene reaction process.
4) The invention adopts the ultraviolet photochemical deposition method to load the noble metal Pt, which not only avoids the conventional method but also avoids the prior method
Protoagents, e.g. NaBH4The use of (2) and the subsequent hydrogen reduction treatment have the characteristic of environmental friendliness, and the synergistic effect between the active component and the carrier can be enhanced, so that the low-temperature degradation performance of the toluene of the catalyst is improved.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Example 1
A preparation method of a catalyst for air purification is realized by the following specific steps:
(1) preparation of manganese cobalt composite oxide
Mixing and stirring a manganese acetate solution and a cobalt sulfate solution at room temperature for 10min, then adding urea and CTAB, continuously stirring for 30min, reacting the obtained mixed solution at 80 ℃ for 24h, centrifuging, washing and drying the obtained product, and roasting at 350 ℃ for 6 h; the mass ratio of the manganese acetate to the cobalt sulfate is 1:3, the addition of the urea is 10 times of the total mass of the manganese acetate and the cobalt sulfate, and the addition of CTAB is 2wt% of the total weight of the manganese acetate and the cobalt sulfate; the mass concentration of the manganese acetate solution is 0.1mol/L, and the mass concentration of the cobalt sulfate solution is 0.3 mol/L;
(2) synthesis of ionic liquid precursor MIMPS
Adding 1, 3-propane sultone and p-xylene into an ultrasonic reactor, and introducing N into the ultrasonic reactor at a flow rate of 20mL/min after the 1, 3-propane sultone and the p-xylene are completely dissolved22h, then opening an ultrasonic reactor to keep the power at 200W, dropwise adding N-methylimidazole into the ultrasonic reaction at the speed of 10 drops/min through a constant-pressure dropping funnel, continuously reacting for 4h after dropwise adding is finished to obtain a milky reaction mixture, centrifuging the reaction mixture, washing the obtained white precipitate with ethyl acetate for three times, and drying at 70 ℃ for 6h to obtain a white powder solid, namely MIMPS; the mass concentration of the 1, 3-propane sultone in p-xylene is 0.5moL/L, and the mass ratio of the 1, 3-propane sultone to N-methylimidazole is 1: 1;
(3) preparation of manganese-cobalt composite oxide and manganese-based solid ionic liquid composite carrier
Adding manganese-cobalt composite oxide, phosphotungstic acid, manganese acetate and MIMPS (metal insulator-metal-insulator-semiconductor) into deionized water to obtain a mixture, stirring at room temperature for 20 min, transferring the mixture into an ultrasonic reactor to react for 6h at 200W, centrifuging the mixture after the reaction is finished, drying the obtained solid product at 70 ℃ for 8h, and obtaining the solid, namely the composite carrier of the manganese-cobalt composite oxide and the manganese-based solid ionic liquid; wherein, phosphotungstic acid, manganese acetate and MIMPS react in an ultrasonic reactor to obtain manganese-based solid ionic liquid Mn [ MIMPS]PW12O4(ii) a Quality of manganese-cobalt composite oxide in mixtureThe quantitative concentration is 10g/100 mL; the molar ratio of phosphotungstic acid, MIMPS and manganese acetate is 1.0:1.0: 1.0; the molar concentration of MIMPS in the mixture is 0.15 mol/L;
(4) active component Pt loading
Sequentially adding a chloroplatinic acid solution, the composite carrier prepared in the step (3) and formic acid into a three-neck flask, then introducing nitrogen into the three-neck flask to remove oxygen in the three-neck flask, stirring the obtained mixture for 4 hours under the irradiation of 300W ultraviolet light, and sequentially centrifuging, washing and drying to obtain a catalyst with the Pt content of 1.0 wt%; the mass concentration of platinum is 50mg/L, the mass ratio of platinum to the composite carrier is 1:99, the volume ratio of formic acid to water is kept to be 1:20, the drying condition is 100 ℃ for 10h, and the catalyst is marked as catalyst A.
Example 2
A preparation method of a catalyst for air purification is realized by the following specific steps:
(1) preparation of manganese cobalt composite oxide
Mixing and stirring a manganese acetate solution and a cobalt sulfate solution at room temperature for 20 min, then adding urea and CTAB, continuously stirring for 30min, reacting the obtained mixed solution at 90 ℃ for 12h, centrifuging, washing and drying the obtained product, and roasting at 450 ℃ for 3 h; the mass ratio of the manganese acetate to the cobalt sulfate is 3:1, the addition amount of the urea is 20 times of the total mass of the manganese acetate and the cobalt sulfate, and the addition amount of CTAB is 5wt% of the total weight of the manganese acetate and the cobalt sulfate; the mass concentration of the manganese acetate solution is 0.3mol/L, and the mass concentration of the cobalt sulfate solution is 0.1 mol/L;
(2) synthesis of ionic liquid precursor MIMPS
Adding 1, 3-propane sultone and p-xylene into an ultrasonic reactor, and introducing N into the ultrasonic reactor at the flow rate of 50mL/min after the 1, 3-propane sultone and the p-xylene are completely dissolved21h, then opening the ultrasonic reactor to keep the power at 300W, dropwise adding N-methylimidazole into the ultrasonic reaction at the speed of 20 drops/min through a constant-pressure dropping funnel, continuing to react for 6h after the dropwise addition is finished to obtain a milky reaction mixture, centrifuging the reaction mixture, and using the obtained white precipitate for precipitationWashing with ethyl acetate for three times, and drying at 90 deg.C for 4 hr to obtain white powder solid (MIMPS); the mass concentration of the 1, 3-propane sultone in p-xylene is 0.5moL/L, and the mass ratio of the 1, 3-propane sultone to N-methylimidazole is 1: 1;
(3) preparation of manganese-cobalt composite oxide and manganese-based solid ionic liquid composite carrier
Adding manganese-cobalt composite oxide, phosphotungstic acid, manganese acetate and MIMPS (metal insulator-metal-insulator-semiconductor) into deionized water to obtain a mixture, stirring at room temperature for 20 min, transferring the mixture into an ultrasonic reactor to react for 3h at 400W, centrifuging the mixture after the reaction is finished, drying the obtained solid product at 90 ℃ for 6h, and obtaining the solid, namely the composite carrier of the manganese-cobalt composite oxide and the manganese-based solid ionic liquid; wherein, phosphotungstic acid, manganese acetate and MIMPS react in an ultrasonic reactor to obtain manganese-based solid ionic liquid Mn0.5[MIMPS]2PW12O40(ii) a The mass concentration of the manganese-cobalt composite oxide in the mixture is 30g/100 mL; the molar ratio of phosphotungstic acid, MIMPS and manganese acetate is 1.0:2.0: 0.5; the molar concentration of MIMPS in the mixture is 0.15 mol/L;
(4) active component Pt loading
Sequentially adding a chloroplatinic acid solution, the composite carrier prepared in the step (3) and formic acid into a three-neck flask, then introducing nitrogen into the three-neck flask to remove oxygen in the three-neck flask, stirring the obtained mixture for 8 hours under the irradiation of 300W ultraviolet light, and sequentially centrifuging, washing and drying to obtain a catalyst with the Pt content of 3.0 wt%; the mass concentration of platinum is 50mg/L, the mass ratio of platinum to the composite carrier is 3:97, the volume ratio of formic acid to water is kept to be 1:20, the drying condition is 130 ℃ for drying for 5h, and the catalyst is marked as catalyst B.
Example 3
A preparation method of a catalyst for air purification is realized by the following specific steps:
(1) preparation of manganese cobalt composite oxide
Mixing and stirring a manganese acetate solution and a cobalt sulfate solution at room temperature for 15 min, then adding urea and CTAB, continuously stirring for 30min, reacting the obtained mixed solution at 85 ℃ for 18h, centrifuging, washing and drying the obtained product, and roasting at 400 ℃ for 5 h; the mass ratio of the manganese acetate to the cobalt sulfate is 1:1, the addition of the urea is 15 times of the total mass of the manganese acetate and the cobalt sulfate, and the addition of CTAB is 4wt% of the total weight of the manganese acetate and the cobalt sulfate; the mass concentration of the manganese acetate solution is 0.2mol/L, and the mass concentration of the cobalt sulfate solution is 0.2 mol/L;
(2) synthesis of ionic liquid precursor MIMPS
Adding 1, 3-propane sultone and p-xylene into an ultrasonic reactor, and introducing N into the ultrasonic reactor at the flow rate of 35mL/min after the 1, 3-propane sultone and the p-xylene are completely dissolved21.5h, then opening an ultrasonic reactor to keep the power at 250W, dropwise adding N-methylimidazole into the ultrasonic reaction at the speed of 15 drops/min through a constant-pressure dropping funnel, continuing to react for 5h after the dropwise adding is finished to obtain a milky reaction mixture, centrifuging the reaction mixture, washing the obtained white precipitate with ethyl acetate for three times, and drying at 80 ℃ for 5h to obtain white powder solid, namely MIMPS; the mass concentration of the 1, 3-propane sultone in p-xylene is 0.5moL/L, and the mass ratio of the 1, 3-propane sultone to N-methylimidazole is 1: 1;
(3) preparation of manganese-cobalt composite oxide and manganese-based solid ionic liquid composite carrier
Adding manganese-cobalt composite oxide, phosphotungstic acid, manganese acetate and MIMPS (metal insulator-metal-insulator-semiconductor) into deionized water to obtain a mixture, stirring at room temperature for 20 min, transferring the mixture into an ultrasonic reactor to react for 5h at 300W, centrifuging the mixture after the reaction is finished, drying the obtained solid product at 80 ℃ for 7h, and obtaining the solid, namely the composite carrier of the manganese-cobalt composite oxide and the manganese-based solid ionic liquid; wherein, phosphotungstic acid, manganese acetate and MIMPS react in an ultrasonic reactor to obtain manganese-based solid ionic liquid Mn0.5[MIMPS]HPW12O40(ii) a The mass concentration of the manganese-cobalt composite oxide in the mixture is 20g/100 mL; the molar ratio of phosphotungstic acid, MIMPS and manganese acetate is 1.0:1.0: 0.5; the molar concentration of MIMPS in the mixture is 0.15 mol/L;
(4) active component Pt loading
Sequentially adding a chloroplatinic acid solution, the composite carrier prepared in the step (3) and formic acid into a three-neck flask, then introducing nitrogen into the three-neck flask to remove oxygen in the three-neck flask, stirring the obtained mixture for 6 hours under the irradiation of 300W ultraviolet light, and sequentially centrifuging, washing and drying to obtain a catalyst with the Pt content of 2.0 wt%; the mass concentration of platinum is 50mg/L, the mass ratio of platinum to the composite carrier is 2.0:98.0, the volume ratio of formic acid to water is kept to be 1:20, the drying condition is 120 ℃ for drying for 8 hours, and the catalyst is marked as catalyst C.
Comparative example 1
A preparation method of a catalyst for air purification is realized by the following specific steps:
(1) preparation of manganese cobalt composite oxide
Mixing and stirring a manganese acetate solution and a cobalt sulfate solution at room temperature for 20 min, then adding urea and CTAB, continuously stirring for 30min, reacting the obtained mixed solution at 90 ℃ for 12h, centrifuging, washing and drying the obtained product, and roasting at 450 ℃ for 3 h; the mass ratio of the manganese acetate to the cobalt sulfate is 3:1, the addition amount of the urea is 20 times of the total mass of the manganese acetate and the cobalt sulfate, and the addition amount of CTAB is 5wt% of the total weight of the manganese acetate and the cobalt sulfate; the mass concentration of the manganese acetate solution is 0.3mol/L, and the mass concentration of the cobalt sulfate solution is 0.1 mol/L;
(2) active component Pt loading
Sequentially adding a chloroplatinic acid solution, the manganese-cobalt composite oxide prepared in the step (1) and formic acid into a three-neck flask, then introducing nitrogen into the three-neck flask to remove oxygen in the three-neck flask, stirring the obtained mixture for 8 hours under the irradiation of 300W ultraviolet light, and sequentially centrifuging, washing and drying to obtain a catalyst with the Pt content of 3.0 wt%; the mass concentration of platinum is 50mg/L, the mass ratio of platinum to manganese cobalt composite oxide is 3.0:97.0, the volume ratio of formic acid to water is kept to be 1:20, the catalyst is dried for 5 hours at 130 ℃, and the catalyst is marked as catalyst D.
Comparative example 2
A preparation method of a catalyst for air purification is realized by the following specific steps:
(1) synthesis of ionic liquid precursor MIMPS
Adding 1, 3-propane sultone and p-xylene into an ultrasonic reactor, and introducing N into the ultrasonic reactor at the flow rate of 50mL/min after the 1, 3-propane sultone and the p-xylene are completely dissolved21h, then opening an ultrasonic reactor to keep the power at 300W, dropwise adding N-methylimidazole into the ultrasonic reaction at the speed of 20 drops/min through a constant-pressure dropping funnel, continuously reacting for 6h after dropwise adding is finished to obtain a milky reaction mixture, centrifuging the reaction mixture, washing the obtained white precipitate with ethyl acetate for three times, and drying at 90 ℃ for 4h to obtain a white powder solid, namely MIMPS; the mass concentration of the 1, 3-propane sultone in p-xylene is 0.5moL/L, and the mass ratio of the 1, 3-propane sultone to N-methylimidazole is 1: 1;
(2) preparation of manganese-based solid ionic liquid
Adding phosphotungstic acid, manganese acetate and MIMPS into deionized water to obtain a mixture, stirring at room temperature for 20 min, transferring into an ultrasonic reactor, reacting at 400W for 3h, centrifuging the mixture after the reaction is finished, drying the obtained solid product at 90 ℃ for 6h, and obtaining a solid, namely manganese-based solid ionic liquid Mn0.5[MIMPS]2PW12O40(ii) a The molar ratio of phosphotungstic acid, MIMPS and manganese acetate in the mixture is 1.0:2.0: 0.5; the molar concentration of MIMPS in the mixture is 0.15 mol/L;
(3) active component Pt loading
Sequentially adding a chloroplatinic acid solution, the manganese-based solid ionic liquid prepared in the step (2) and formic acid into a three-neck flask, then introducing nitrogen into the three-neck flask to remove oxygen in the three-neck flask, stirring the obtained mixture for 8 hours under the irradiation of 300W ultraviolet light, and sequentially centrifuging, washing and drying to obtain a catalyst with the Pt content of 3.0 wt%; the mass concentration of platinum is 50mg/L, the mass ratio of platinum to the composite carrier is 3.0:97.0, the volume ratio of formic acid to water is kept to be 1:20, the drying condition is 130 ℃ for drying for 5h, and the catalyst is marked as catalyst E.
And (3) testing the activity of the catalyst:
the toluene catalytic oxidation reaction is carried out in a fixed bed reactor, the toluene content in the simulated gas is 10000 ppm, the volume concentration of oxygen is 20%, the balance gas is nitrogen, the flow rate of the simulated gas is 200mL/min, the airspeed is 100,000/h, and the reaction temperature range is 100-200 ℃. And (3) measuring the contents of toluene, CO and CO2 in the inlet and the outlet of the reaction by adopting gas chromatography, and calculating the conversion rate of the toluene according to the change of the concentration of the inlet and the outlet. The toluene conversion was calculated as follows
And (3) testing the reaction stability of the catalyst:
respectively taking a certain amount of catalyst B and a certain amount of catalyst D, and observing H on a fixed bed reactor2The effect of O on catalytic activity. The toluene content in the reaction mixture gas is 10000 ppm, the volume concentration of oxygen is 20%, the water vapor content is 2vol%, the balance gas is nitrogen, the total gas flow is 200mL/min, and the examination time is 24 h.
In the process of examining the catalytic oxidation of toluene at a reaction temperature of 200 ℃, for the catalyst B, H is simultaneously injected into the reaction system2The conversion of toluene after O3H decreased from the initial 100% to 97.5%, and then remained essentially stable as H2After O is removed, the catalytic activity is gradually recovered to 99.9%. Catalyst D was tested under the same conditions, while injecting H into the reaction system2After O3H, the conversion rate of toluene is reduced to 65.8% from the initial 82.4%, and the conversion rate of toluene is gradually reduced to 43.6% along with the experiment, when H is used2The catalytic activity can only be restored to 58.2% after the O is removed.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A catalyst for air purification, characterized in that: manganese-cobalt composite oxide and manganese-based solid ionic liquid are combined to be used as a composite carrier, noble metal Pt is used as an active component, and the manganese-based solid ionic liquid is Mn [ MIMPS ]]PW12O40、Mn0.5[MIMPS]2PW12O40、Mn0.5[MIMPS]HPW12O40In the catalyst, the mass fraction of Pt is 1.0-3.0 wt%.
2. The preparation method of the catalyst for air purification is characterized by comprising the following specific steps of:
(1) preparation of manganese cobalt composite oxide
Mixing and stirring a manganese acetate solution and a cobalt sulfate solution at room temperature for 10-20 min, then adding urea and CTAB, continuously stirring for 30min, reacting the obtained mixed solution at 80-90 ℃ for 12-24 h, centrifuging, washing and drying the obtained product, and roasting at 350-450 ℃ for 3-6 h; the mass ratio of the manganese acetate to the cobalt sulfate is 1: 3-3: 1, the addition amount of the urea is 10-20 times of the total mass of the manganese acetate and the cobalt sulfate, and the addition amount of the CTAB is 2-5 wt% of the total weight of the manganese acetate and the cobalt sulfate;
(2) synthesis of ionic liquid precursor MIMPS
Adding 1, 3-propane sultone and p-xylene into an ultrasonic reactor, and introducing N into the ultrasonic reactor after completely dissolving21-2 h, then opening an ultrasonic reactor to keep the power at 200-300W, dropwise adding N-methylimidazole into the ultrasonic reaction at the speed of 10-20 drops/min through a constant-pressure dropping funnel, continuing to react for 4-6 h after dropwise adding is finished to obtain a milky reaction mixture, centrifuging the reaction mixture, washing the obtained white precipitate with ethyl acetate, and drying at 70-90 ℃ for 4-6 h to obtain white precipitateThe color powder solid is MIMPS;
(3) preparation of manganese-cobalt composite oxide and manganese-based solid ionic liquid composite carrier
Adding manganese-cobalt composite oxide, phosphotungstic acid, manganese acetate and MIMPS (metal insulator semiconductor) into deionized water to obtain a mixture, stirring at room temperature for 20 min, transferring the mixture into an ultrasonic reactor to react for 3-6 h at 200-400W, centrifuging the mixture after the reaction is finished, drying the obtained solid product at 70-90 ℃ for 6-8 h, and obtaining the solid, namely the composite carrier of the manganese-cobalt composite oxide and the manganese-based solid ionic liquid; wherein phosphotungstic acid, manganese acetate and MIMPS react in an ultrasonic reactor to obtain manganese-based solid ionic liquid;
(4) active component Pt loading
And (3) adding a chloroplatinic acid solution, the composite carrier prepared in the step (3) and formic acid into a three-neck flask in sequence, introducing nitrogen into the three-neck flask to remove oxygen in the three-neck flask, stirring the obtained mixture for 4-8 hours under the irradiation of 300W ultraviolet light, and then sequentially centrifuging, washing and drying to obtain the catalyst with the Pt content of 1.0-3.0 wt%.
3. The method for preparing a catalyst for air purification according to claim 2, wherein: in the step (1), the mass concentration of the manganese acetate solution is 0.1-0.3 mol/L, and the mass concentration of the cobalt sulfate solution is 0.1-0.3 mol/L.
4. The method for preparing a catalyst for air purification according to claim 2, wherein: in the step (2), the mass concentration of the 1, 3-propane sultone in p-xylene is 0.5moL/L, and the ratio of the mass of the 1, 3-propane sultone to the mass of N-methylimidazole is 1: 1.
5. the method for preparing a catalyst for air purification according to claim 2, wherein: in step (2), N2The flow rate of (A) is 20-50 mL/min.
6. The method for preparing a catalyst for air purification according to claim 2, wherein: in the step (3), the mass concentration of the manganese-cobalt composite oxide in the mixture is 10-30 g/100 mL; the molar ratio of phosphotungstic acid, MIMPS and manganese acetate is 1.0 (1.0-2.0) to 0.5-1.0; the molar concentration of MIMPS in the mixture was 0.15 mol/L.
7. The method for preparing a catalyst for air purification according to claim 2, wherein: in the step (4), the mass concentration of platinum is 50mg/L, the mass ratio of platinum to the composite carrier is (1-3) to (97-99), the volume ratio of formic acid to water is kept to be 1:20, and drying is carried out for 5-10 hours at the temperature of 100-130 ℃.
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| CN114515579A (en) * | 2022-03-11 | 2022-05-20 | 黑龙江大学 | Preparation method of catalyst for low-temperature catalytic oxidation of volatile organic compounds |
| CN116713006A (en) * | 2023-06-05 | 2023-09-08 | 郑州大学 | Pt/MnCo 2 O 4 Preparation method and application of foam nickel composite material |
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| CN114515579A (en) * | 2022-03-11 | 2022-05-20 | 黑龙江大学 | Preparation method of catalyst for low-temperature catalytic oxidation of volatile organic compounds |
| CN116713006A (en) * | 2023-06-05 | 2023-09-08 | 郑州大学 | Pt/MnCo 2 O 4 Preparation method and application of foam nickel composite material |
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