CN115888768A - Composite catalyst suitable for plasma characteristics, preparation method and application - Google Patents
Composite catalyst suitable for plasma characteristics, preparation method and application Download PDFInfo
- Publication number
- CN115888768A CN115888768A CN202211360632.XA CN202211360632A CN115888768A CN 115888768 A CN115888768 A CN 115888768A CN 202211360632 A CN202211360632 A CN 202211360632A CN 115888768 A CN115888768 A CN 115888768A
- Authority
- CN
- China
- Prior art keywords
- mno
- plasma
- composite catalyst
- washing
- hydrothermal treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 67
- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 55
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000005406 washing Methods 0.000 claims abstract description 47
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 claims abstract description 36
- 238000010335 hydrothermal treatment Methods 0.000 claims abstract description 29
- 238000001035 drying Methods 0.000 claims abstract description 21
- RXPAJWPEYBDXOG-UHFFFAOYSA-N hydron;methyl 4-methoxypyridine-2-carboxylate;chloride Chemical compound Cl.COC(=O)C1=CC(OC)=CC=N1 RXPAJWPEYBDXOG-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 19
- 239000000725 suspension Substances 0.000 claims abstract description 18
- 230000003197 catalytic effect Effects 0.000 claims abstract description 15
- 238000013329 compounding Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 61
- 238000000034 method Methods 0.000 claims description 37
- 239000012855 volatile organic compound Substances 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000008367 deionised water Substances 0.000 claims description 22
- 229910021641 deionized water Inorganic materials 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 21
- 238000011065 in-situ storage Methods 0.000 claims description 18
- 235000019441 ethanol Nutrition 0.000 claims description 7
- 230000002195 synergetic effect Effects 0.000 claims description 7
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 239000012286 potassium permanganate Substances 0.000 claims description 6
- 239000004005 microsphere Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 230000001588 bifunctional effect Effects 0.000 claims description 2
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- 150000002894 organic compounds Chemical class 0.000 claims description 2
- 238000012512 characterization method Methods 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000010525 oxidative degradation reaction Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 8
- 230000003993 interaction Effects 0.000 abstract description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 51
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 48
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 48
- 210000002381 plasma Anatomy 0.000 description 43
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 36
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 34
- 239000010453 quartz Substances 0.000 description 33
- 229960000583 acetic acid Drugs 0.000 description 20
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 230000004888 barrier function Effects 0.000 description 10
- 229910002091 carbon monoxide Inorganic materials 0.000 description 10
- 238000011049 filling Methods 0.000 description 10
- 239000002244 precipitate Substances 0.000 description 10
- 239000002994 raw material Substances 0.000 description 10
- 230000015556 catabolic process Effects 0.000 description 9
- 238000006731 degradation reaction Methods 0.000 description 9
- 238000005265 energy consumption Methods 0.000 description 6
- 239000005416 organic matter Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- 239000003989 dielectric material Substances 0.000 description 5
- 238000007865 diluting Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000004817 gas chromatography Methods 0.000 description 5
- 239000012362 glacial acetic acid Substances 0.000 description 5
- 239000005337 ground glass Substances 0.000 description 5
- 238000001027 hydrothermal synthesis Methods 0.000 description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 5
- 239000002440 industrial waste Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- IVSZLXZYQVIEFR-UHFFFAOYSA-N m-xylene Chemical compound CC1=CC=CC(C)=C1 IVSZLXZYQVIEFR-UHFFFAOYSA-N 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000643 oven drying Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000012456 homogeneous solution Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052914 metal silicate Inorganic materials 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001303 quality assessment method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
Classifications
-
- 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 belongs to the technical field of catalysts, and discloses a composite catalyst suitable for plasma characteristics, a preparation method and application thereof 2 (ii) a MnO with a certain molar ratio 2 Respectively dissolving anhydrous bismuth nitrate and potassium bromide in a proper amount of ethylene glycol, mixing the three solutions after respectively dissolving, adding a proper amount of anhydrous ethanol, continuously stirring until a uniform suspension is formed, carrying out hydrothermal treatment, filtering, washing and drying to obtain Bi 4 O 5 Br 2 ‑MnO 2 And (3) compounding a catalyst. Bi of the present invention 4 O 5 Br 2 And MnO 2 The two catalytic components can respectively act on high-energy electrons and O of key active species in low-temperature plasma 3 Fully utilizing; at the same time, bi 4 O 5 Br 2 And MnO 2 Have strong interaction, can enhance the catalytic benefits of each other through electron transport during the reaction. The catalytic activity, stability and energy efficiency of the composite catalyst in a low-temperature plasma-catalytic system are superior to those of the prior art.
Description
Technical Field
The invention belongs to the technical field of catalysts, and particularly relates to Bi suitable for low-temperature plasma characteristics 4 O 5 Br 2 -MnO 2 A composite catalyst, a preparation method and application.
Background
At present, volatile Organic Compounds (VOCs) are not only toxic in nature (some are even potentially carcinogenic), but also cause dust-haze and increased oxidizability (as fine particulate matter PM2.5 and ozone O) 3 Characteristic pollutants), is a main gaseous pollutant which influences the quality of the national atmospheric environment, is a new index for urban air quality assessment, and provides a new method for accelerating the comprehensive treatment of VOCs (volatile organic compounds), and requires the total emission of VOCs to be reduced by more than 10%, so that the emission control of VOCs is the key point of the atmospheric pollution control work at the present stage, and especially the emission reduction of VOCs in key industries (such as petrifaction, chemical industry, coating, printing and the like). The key industry-controlled VOCs include toluene, ethylene, formaldehyde, meta/para-xylene, etc., which are typically low concentration, unorganized emissions.
At present, the common treatment methods for VOCs comprise an adsorption method, an absorption method, a condensation method, a biological method, a catalytic combustion method, a photocatalytic technology and the like, and the treatment of the VOCs has the problems of high investment cost, high temperature required in the reaction process, large occupied area, difficult treatment of byproducts and the like. The low-temperature plasma technology has quite a case of industrial application due to the advantages of low investment and operation cost, normal temperature and pressure of reaction, convenient start and stop, strong adaptability on the treatment of low-concentration and large-air-volume VOCs and the like. The bottleneck restricting the further development of the technology at present is high energy consumption and secondary pollution. The problem can be effectively solved by selecting a proper catalyst to be cooperatively used with the plasma, wherein the development of a functional catalyst suitable for the plasma characteristics is the core of a cooperative process and is a research hotspot in the field.
At present, a great number of patents at home and abroad disclose various low-temperature plasma catalysts of different types and synthesis methods thereof, for example, a Chinese patent with publication number CN114247466A discloses a low-temperature plasma synergistic catalyst for treating VOCs, a preparation method and application thereof, wherein the catalyst has a core-shell structure, a core layer is one or more molecular sieves of 13X, HZSM-5, hbeta and 3A, and a shell layer is a Ni/Co metal silicate compound and Fe/Cu active metal, and has good activity and stability. However, the reduction of the energy consumption of the conventional plasma catalyst for the synergistic process is still very limited, mainly because the active species generated in the plasma cannot be effectively utilized, and energy loss is caused.
Through the above analysis, the problems and defects of the prior art are as follows: the conventional plasma catalyst has very limited reduction of energy consumption of a synergistic process, and active species generated in the plasma cannot be effectively utilized, so that energy loss is caused.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a composite catalyst suitable for plasma characteristics, a preparation method and application.
The invention is realized in such a way that a preparation method of a composite catalyst suitable for plasma characteristics comprises the following steps:
step one, mnO 2 Preparation: potassium permanganate and acetic acid solution in certain molar ratio are fully mixed, and MnO is obtained after hydrothermal treatment, filtration, washing and drying 2 ；
Step two, bi 4 O 5 Br 2 -MnO 2 In-situ preparation: mnO with a certain molar ratio 2 Respectively dissolving anhydrous bismuth nitrate and potassium bromide in appropriate amount of ethylene glycol, mixing the three solutions, adding appropriate amount of anhydrous ethanol, and stirring to obtain solutionForming uniform suspension, filtering, washing and drying after hydrothermal treatment to obtain Bi 4 O 5 Br 2 -MnO 2 And (3) compounding a catalyst.
Further, the molar ratio of potassium permanganate to acetic acid solution in the first step is 1. The acetic acid solution is used as a reducing agent in the reaction process to reduce high-valence manganese to a low-valence state, and if the concentration is too high, the high-valence manganese further reacts with the generated MnO 2 Reaction takes place leading to MnO 2 Is dissolved.
Further, in the step one hydrothermal treatment, the heat treatment is carried out at 100-180 ℃ for 10-20 hours, and the high temperature and high pressure provided by the hydrothermal process are used for accelerating the reaction process.
Further, the washing process of the first step simultaneously comprises two processes of deionized water washing and ethanol washing, wherein the drying temperature is 60-90 ℃, the deionized water washing is used for removing redundant soluble impurities on the surface, and the ethanol washing is used for washing off organic matter components remained on the surface of the catalyst.
Further, the molar ratio of the anhydrous bismuth nitrate to the anhydrous potassium bromide in the second step is 1 4 O 5 Br 2 The content of each element in the catalytic component accounts for the ratio; soluble salt and MnO in the ethylene glycol solution 2 The concentration of the bismuth nitrate is 0.1-1 mol/L, wherein the dosage of the glycol solution at least ensures that the anhydrous bismuth nitrate and the potassium bromide can be completely dissolved respectively; the dosage of the absolute ethyl alcohol is 1 to 5 times of the total amount of the ethylene glycol, and the addition of the absolute ethyl alcohol to Bi 4 O 5 Br 2 The growth of the microspheres is critical.
Further, in the step two hydrothermal treatment, hydrothermal is carried out for 10-20 h at 120-200 ℃, the washing process simultaneously comprises two processes of deionized water washing and ethanol washing, and the drying temperature is 60-90 ℃.
Another object of the present invention is to provide a composite catalyst suitable for plasma characteristics, which is Bi 4 O 5 Br 2 -MnO 2 CompoundingCatalyst comprising Bi 4 O 5 Br 2 And MnO 2 A bifunctional component, bi 4 O 5 Br 2 And MnO 2 1 to 5.
Further, the composite catalyst suitable for plasma characteristics is in-situ synergistic with plasma, and Bi 4 O 5 Br 2 And MnO 2 The two catalytic components can respectively act on high-energy electrons and O of key active species in low-temperature plasma 3 And the organic compounds are fully utilized to generate strong oxidizing species, and typical VOCs are efficiently purified.
Further, mnO 2 In-situ assembled on Bi 4 O 5 Br 2 Flower-like microsphere surface.
The invention also aims to provide the application of the composite catalyst suitable for the plasma characteristics in the low-temperature plasma catalytic oxidation degradation of VOCs.
By combining the technical scheme and the technical problem to be solved, the technical scheme to be protected by the invention has the advantages and positive effects that:
in order to solve the problems of high energy consumption and serious secondary pollution of a low-temperature plasma process, bi suitable for the characteristics of plasmas is synthesized by a two-step hydrothermal method 4 O 5 Br 2 -MnO 2 A composite function catalyst, in-situ synergy with plasma, wherein Bi 4 O 5 Br 2 And MnO 2 The catalytic component may be responsible for the key energy carriers (energetic electrons) and active species (O) contained in the plasma itself, respectively 3 ) The catalytic components are fully utilized, and strong oxidizing species can be generated while being activated in the plasma, so that the decomposition and mineralization of typical VOCs are accelerated, the degradation performance of the plasma-catalytic process is improved, and the process energy utilization efficiency is improved.
Further, in the present invention, mnO may be added 2 In-situ assembly on Bi by a two-step hydrothermal method 4 O 5 Br 2 Surface of microspheres, mnO 2 The components are subjected to surface modification in the secondary hydrothermal process, so that the surfaces of the components have more surface oxygen vacancies and more surface oxygen vacanciesThe formation of surface active oxygen is facilitated; and MnO of 2 And Bi 4 O 5 Br 2 The two components are tightly combined, the interaction is obvious, and the catalytic benefits of each other can be enhanced through electron transmission in the reaction process.
The composite catalyst suitable for plasma characteristics provided by the invention is in-situ synergistic with plasma, and Bi 4 O 5 Br 2 And MnO 2 The two catalytic components can respectively act on high-energy electrons and O of key active species in low-temperature plasma 3 And the organic solvent is fully utilized to generate strong oxidizing species, and typical VOCs (such as toluene, acetone, ethyl acetate, paraxylene and the like) are efficiently purified. At the same time, thanks to Bi 4 O 5 Br 2 And MnO 2 The two components are in close contact in the in-situ assembly process, have strong interaction, and can enhance the catalytic benefits of each other through electron transmission in the reaction process. The catalytic activity, stability and energy efficiency of the composite catalyst in a low-temperature plasma-catalytic system are superior to those of the prior art.
As inventive supplementary proof of the claims of the present invention, also present several important aspects:
the expected income and commercial value after the technical scheme of the invention is converted are as follows: the composite catalyst provided by the invention has very good applicability to the characteristics of plasma, can improve the degradation performance of a plasma-catalysis process, and simultaneously improve the energy utilization efficiency of the process, can be expected to be widely applied to VOCs emission reduction in the industries of coating, chemical engineering, printing and the like after conversion, and has remarkable commercial value.
The technical scheme of the invention fills the technical blank in the industry at home and abroad: bi proposed by the invention 4 O 5 Br 2 -MnO 2 The composite catalyst and the preparation method and the application thereof have no related research and patent reports, but the composite catalyst can fully utilize key active species in low-temperature plasma, forms good synergistic enhancement effect with the plasma, and fills up the technical blank of the functional catalyst applicable to the plasma characteristics in the domestic and foreign industries.
Technique of the inventionWhether the scheme solves the technical problem which is always desired to be solved by people but is not successful all the time is as follows: the application of the low-temperature plasma process is limited by the bottleneck problems of high energy consumption, serious secondary pollution and the like, and in order to solve the problem, the development of a high-performance catalyst is always the research focus in the field, but has difficult related breakthrough. The functional catalyst provided by the invention can be used for treating key active species in low-temperature plasma, namely high-energy electrons and O 3 Fully utilizing the oxygen to generate strong oxidizing species; meanwhile, the two components have strong interaction in the in-situ assembly process, the catalytic benefit and stability of each other can be enhanced through electron transmission in the reaction process, excellent performance of plasma-catalytic purification of typical VOCs is shown, the energy utilization efficiency of the plasma-catalytic process is greatly improved, and a good foundation is laid for the application of the plasma-catalytic process.
The technical scheme of the invention overcomes the technical prejudice whether: the low-temperature plasma technology has the obvious problems of high energy consumption and serious secondary pollution when being used singly, and is subject to the problem of the scaling of an application unit.
Drawings
FIG. 1 is a flow chart of a method for preparing a composite catalyst suitable for plasma characteristics according to an embodiment of the present invention;
FIG. 2 shows Bi synthesized in example 1 of the present invention 4 O 5 Br 2 -MnO 2 XRD pattern of the composite catalyst (XRD is an abbreviation of X-ray diffraction);
FIG. 3 shows Bi synthesized in example 1 of the present invention 4 O 5 Br 2 -MnO 2 Microscopic morphology of the composite catalyst (SEM image, SEM is abbreviation of Scanning Electron microscope, namely Scanning Electron microscope);
FIG. 4 shows Bi synthesized in example 1 of the present invention 4 O 5 Br 2 -MnO 2 Composite catalyst in plasmaAnd (3) carrying out in-situ coordination on the daughter, and carrying out plasma-catalytic degradation on the activity diagram of typical VOCs.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
This section is an explanatory embodiment expanding on the claims so as to fully understand how the present invention is embodied by those skilled in the art.
As shown in fig. 1, a method for preparing a composite catalyst suitable for plasma characteristics according to an embodiment of the present invention includes:
S101，MnO 2 preparation: potassium permanganate and acetic acid solution in certain molar ratio are fully mixed, and MnO is obtained after hydrothermal treatment, filtration, washing and drying 2 ；
S102，Bi 4 O 5 Br 2 -MnO 2 In-situ preparation: mnO with a certain molar ratio 2 Respectively dissolving anhydrous bismuth nitrate and potassium bromide in a proper amount of ethylene glycol, mixing the three solutions after respectively dissolving, adding a proper amount of anhydrous ethanol, and continuously stirring until a uniform suspension is formed;
s103: filtering, washing and drying after hydrothermal treatment to obtain Bi 4 O 5 Br 2 -MnO 2 And (3) compounding a catalyst.
In step S101 of the present invention, a molar ratio of potassium permanganate to an acetic acid solution is 1.
In the hydrothermal treatment in step S101 in the embodiment of the present invention, the heat treatment is performed at 100 to 180 ℃ for 10 to 20 hours.
The step S101 of the embodiment of the invention simultaneously comprises two processes of deionized water washing and ethanol washing, and the drying temperature is 60-90 ℃.
In the embodiment of the invention, the molar ratio of the anhydrous bismuth nitrate to the anhydrous potassium bromide in the step S102 is 1; the ethylene glycolSoluble salt in solution and MnO 2 The concentration of the (A) is 0.1-1 mol/L; the dosage of the absolute ethyl alcohol is 1 to 5 times of the total amount of the ethylene glycol.
In the step S102 of the hydrothermal treatment in the embodiment of the invention, the hydrothermal treatment is carried out for 10-20 h at 120-200 ℃, the washing process simultaneously comprises two processes of deionized water washing and ethanol washing, and the drying temperature is 60-90 ℃.
In order to prove the creativity and the technical value of the technical scheme of the invention, the part is the application example of the technical scheme of the claims on specific products or related technologies.
The composite catalyst suitable for the plasma characteristics provided by the embodiment of the invention can be used for catalyzing, oxidizing and degrading VOCs by using low-temperature plasma.
The embodiment of the invention achieves some positive effects in the process of research and development or use, and has great advantages compared with the prior art, and the following contents are described by combining data, diagrams and the like in the test process.
Example 1:
MnO 2 the preparation of (1): the molar ratio of the raw materials is KMnO 4 : acetic acid solution = 1. Firstly, diluting glacial acetic acid to a diluted acetic acid solution with a certain concentration by using deionized water, and then adding KMnO 4 Dissolving in the solution, stirring at room temperature for 4h to form a uniform solution, and pouring into a polytetrafluoroethylene-lined hydrothermal kettle, performing hydrothermal treatment at 140 ℃ for 12h, wherein the filling degree of the hydrothermal kettle is 70%. Washing the precipitate after hydrothermal treatment with deionized water until the pH value is 6.5, washing with absolute ethyl alcohol for 3 times to remove the organic matters on the surface, and drying the sample at 70 ℃ for later use.
Bi 4 O 5 Br 2 -MnO 2 In-situ preparation: the molar ratio of the raw materials is MnO 2 : anhydrous bismuth nitrate: potassium bromide = 3. MnO of 2 Respectively dissolving anhydrous bismuth nitrate and potassium bromide in a proper amount of ethylene glycol, stirring for 2h respectively until a uniform solution/suspension is formed, mixing together, adding a proper amount of anhydrous ethanol (the amount of the anhydrous ethanol is 3 times of the total amount of the ethylene glycol), continuously stirring until a uniform suspension is formed, pouring the uniform suspension into a polytetrafluoroethylene-lined hydrothermal kettle, performing hydrothermal treatment at 180 ℃ for 16h, and performing hydrothermal treatment on the hydrothermal kettleThe degree of filling was 70%. Washing the precipitate after hydrothermal treatment with deionized water to pH 6.5, washing with anhydrous ethanol for 3 times to remove the residual organic matter on the surface, and drying the sample at 70 deg.C to obtain Bi 4 O 5 Br 2 -MnO 2 And (3) compounding a catalyst.
Performance testing of the catalyst: the synthesized composite catalyst is coated on the surface of ground glass beads and filled in a discharge area of a dielectric barrier discharge reactor for degradation experiments of typical VOCs (toluene, ethyl acetate, acetone and paraxylene). The plasma reactor in the example is a coaxial cylindrical double-dielectric barrier discharge reactor, the inner and outer dielectrics are quartz, the outer diameter of the quartz outer tube is 25mm, the thickness of the quartz outer tube is 2.5mm, the outer diameter of the quartz inner tube is 14mm, the thickness of the quartz inner tube is 2mm, the surface of the quartz outer tube is tightly wound with a metal mesh as a ground electrode, metal powder is densely filled in the quartz inner tube as a positive electrode, the discharge length of the reactor is 100mm, and the discharge gap is 3mm; the power supply adopts a modulation pulse power supply; simulating industrial waste gas from N 2 、O 2 Toluene/ethyl acetate/acetone/p-xylene, in which O 2 20 percent, 200ppm of VOCs and 3L/min of flow rate; measuring VOCs, CO and CO at inlet and outlet of reactor by gas chromatography 2 And (4) concentration. When the energy density is 392J/L, the toluene removal rate can reach more than 98 percent at most, and CO x The selectivity can reach 90 percent; the removal rate of ethyl acetate can reach more than 99 percent, and CO x The selectivity can reach 98 percent; the acetone removal rate can reach more than 97 percent at most, and CO is removed x The selectivity can reach 93 percent; the highest removal rate of p-xylene can reach more than 95 percent, and CO x The selectivity can reach 85 percent.
Example 2:
MnO 2 the preparation of (1): the molar ratio of the raw materials is KMnO 4 : acetic acid solution = 1. Firstly diluting glacial acetic acid to a diluted acetic acid solution with a certain concentration by using deionized water, and then adding KMnO 4 Dissolving in the mixture, stirring at room temperature for 4h to form a uniform solution, and pouring into a polytetrafluoroethylene-lined hydrothermal kettle for hydrothermal for 12h at 140 ℃, wherein the filling degree of the hydrothermal kettle is 70%. Washing the precipitate with deionized water to pH 6.5, and washing with anhydrous ethanol for 3 times to remove excessive surfaceAnd drying the sample at 70 ℃ for standby.
Bi 4 O 5 Br 2 -MnO 2 In-situ preparation: the molar ratio of the raw materials is MnO 2 : anhydrous bismuth nitrate: potassium bromide = 3. MnO of 2 Respectively dissolving anhydrous bismuth nitrate and potassium bromide in a proper amount of ethylene glycol, stirring for 2 hours respectively until a uniform solution/suspension is formed, mixing together, adding a proper amount of anhydrous ethanol (the amount of the anhydrous ethanol is 3 times of the total amount of the ethylene glycol), continuously stirring until a uniform suspension is formed, pouring the uniform suspension into a polytetrafluoroethylene-lined hydrothermal kettle, and carrying out hydrothermal treatment at 180 ℃ for 16 hours, wherein the filling degree of the hydrothermal kettle is 70%. Washing the hydrothermal precipitate with deionized water to pH 6.5, washing with anhydrous ethanol for 3 times to remove the organic matter on the surface, and oven drying at 70 deg.C to obtain Bi 4 O 5 Br 2 -MnO 2 And (3) compounding a catalyst.
Performance testing of the catalyst: the synthesized composite catalyst is coated on the surface of ground glass beads and filled in a discharge area of a dielectric barrier discharge reactor for degradation experiments of typical VOCs (toluene, ethyl acetate, acetone and paraxylene). The plasma reactor in the example is a coaxial cylindrical double-dielectric barrier discharge reactor, the inner and outer dielectrics are quartz, the outer diameter of the quartz outer tube is 25mm, the thickness of the quartz outer tube is 2.5mm, the outer diameter of the quartz inner tube is 14mm, the thickness of the quartz inner tube is 2mm, the surface of the quartz outer tube is tightly wound with a metal mesh as a ground electrode, metal powder is densely filled in the quartz inner tube as a positive electrode, the discharge length of the reactor is 100mm, and the discharge gap is 3mm; the power supply adopts a modulation pulse power supply; simulating industrial waste gas from N 2 、O 2 Toluene/ethyl acetate/acetone/p-xylene, in which O 2 20 percent, 200ppm of VOCs and 3L/min of flow rate; measuring VOCs, CO and CO at inlet and outlet of reactor by gas chromatography 2 And (4) concentration. When the energy density is 392J/L, the toluene removal rate can reach more than 96 percent at most, and CO is removed x The selectivity can reach 86 percent; the highest ethyl acetate removal rate can reach more than 98 percent, and CO x The selectivity can reach 96 percent; the acetone removal rate can reach more than 95 percent at most, and CO is removed x The selectivity can reach 90 percent; the highest removal rate of p-xylene can reach more than 91 percent，CO x The selectivity can reach 82 percent.
Example 3:
MnO 2 the preparation of (1): the molar ratio of the raw materials is KMnO 4 : acetic acid solution = 1. Firstly diluting glacial acetic acid to a diluted acetic acid solution with a certain concentration by using deionized water, and then adding KMnO 4 Dissolving in the solution, stirring at room temperature for 4h to form a uniform solution, and pouring into a polytetrafluoroethylene-lined hydrothermal kettle for hydrothermal treatment at 160 ℃ for 12h, wherein the filling degree of the hydrothermal kettle is 70%. Washing the precipitate after hydrothermal treatment with deionized water until the pH value is 6.5, washing with absolute ethyl alcohol for 3 times to remove the organic matters on the surface, and drying the sample at 70 ℃ for later use.
Bi 4 O 5 Br 2 -MnO 2 In-situ preparation: the molar ratio of the raw materials is MnO 2 : anhydrous bismuth nitrate: potassium bromide = 3. MnO of 2 Respectively dissolving anhydrous bismuth nitrate and potassium bromide in a proper amount of glycol, respectively stirring for 2 hours until a uniform solution/suspension is formed, mixing together, then adding a proper amount of anhydrous ethanol (the amount of the anhydrous ethanol is 3 times of the total amount of the glycol), continuously stirring until a uniform suspension is formed, then pouring the uniform suspension into a polytetrafluoroethylene-lined hydrothermal kettle, and carrying out hydrothermal treatment at 160 ℃ for 20 hours, wherein the filling degree of the hydrothermal kettle is 70%. Washing the hydrothermal precipitate with deionized water to pH 6.5, washing with anhydrous ethanol for 3 times to remove the organic matter on the surface, and oven drying at 70 deg.C to obtain Bi 4 O 5 Br 2 -MnO 2 And (3) compounding a catalyst.
Performance testing of the catalyst: the synthesized composite catalyst is coated on the surface of ground glass beads, and is filled in a discharge area of a dielectric barrier discharge reactor for degradation experiments of typical VOCs (toluene, ethyl acetate, acetone and paraxylene). The plasma reactor in the example is a coaxial cylindrical double-dielectric barrier discharge reactor, the inner and outer dielectrics are quartz, the outer diameter of the quartz outer tube is 25mm, the thickness of the quartz outer tube is 2.5mm, the outer diameter of the quartz inner tube is 14mm, the thickness of the quartz inner tube is 2mm, the surface of the quartz outer tube is tightly wound with a metal mesh as a ground electrode, metal powder is densely filled in the quartz inner tube as a positive electrode, the discharge length of the reactor is 100mm, and the discharge gap is 3mm; power supply adoptsModulating the pulse power supply; simulating industrial waste gas from N 2 、O 2 Toluene/ethyl acetate/acetone/p-xylene, in which O 2 20 percent, 200ppm of VOCs and 3L/min of flow rate; measuring VOCs, CO and CO at inlet and outlet of reactor by gas chromatography 2 And (4) concentration. When the energy density is 454J/L, the toluene removal rate can reach more than 95 percent at most, and CO is removed x The selectivity can reach 88%; the removal rate of ethyl acetate can reach more than 97 percent at most, and CO x The selectivity can reach 95 percent; the acetone removal rate can reach more than 96 percent at most, and CO x The selectivity can reach 90 percent; the highest removal rate of p-xylene can reach more than 92 percent, and CO x The selectivity can reach 80 percent.
Example 4:
MnO 2 the preparation of (1): the molar ratio of the raw materials is KMnO 4 : acetic acid solution = 2. Firstly, diluting glacial acetic acid to a diluted acetic acid solution with a certain concentration by using deionized water, and then adding KMnO 4 Dissolving the mixture in a water solution, stirring the mixture for 4 hours at room temperature until a uniform solution is formed, and pouring the solution into a polytetrafluoroethylene-lined hydrothermal kettle for hydrothermal for 14 hours at 160 ℃, wherein the filling degree of the hydrothermal kettle is 70%. Washing the precipitate after hydrothermal treatment with deionized water until the pH value is 6.5, washing with absolute ethyl alcohol for 3 times to remove the organic matters on the surface, and drying the sample at 70 ℃ for later use.
Bi 4 O 5 Br 2 -MnO 2 In-situ preparation: the molar ratio of the raw materials is MnO 2 : anhydrous bismuth nitrate: potassium bromide = 3. MnO of 2 Respectively dissolving anhydrous bismuth nitrate and potassium bromide in a proper amount of glycol, respectively stirring for 2 hours until a uniform solution/suspension is formed, mixing together, then adding a proper amount of anhydrous ethanol (the amount of the anhydrous ethanol is 3 times of the total amount of the glycol), continuously stirring until a uniform suspension is formed, then pouring the uniform suspension into a polytetrafluoroethylene-lined hydrothermal kettle, and carrying out hydrothermal treatment at 180 ℃ for 14 hours, wherein the filling degree of the hydrothermal kettle is 70%. Washing the precipitate after hydrothermal treatment with deionized water to pH 6.5, washing with anhydrous ethanol for 3 times to remove the residual organic matter on the surface, and drying the sample at 70 deg.C to obtain Bi 4 O 5 Br 2 -MnO 2 And (3) compounding a catalyst.
Performance testing of the catalyst: mixing the aboveThe synthesized composite catalyst is coated on the surface of ground glass beads, is filled in a discharge area of a dielectric barrier discharge reactor, and is used for degradation experiments of typical VOCs (toluene, ethyl acetate, acetone and paraxylene). The plasma reactor in the example is a coaxial cylindrical double-dielectric barrier discharge reactor, the inner and outer dielectrics are quartz, the outer diameter of the quartz outer tube is 25mm, the thickness of the quartz outer tube is 2.5mm, the outer diameter of the quartz inner tube is 14mm, the thickness of the quartz inner tube is 2mm, the surface of the quartz outer tube is tightly wound with a metal mesh as a ground electrode, metal powder is densely filled in the quartz inner tube as a positive electrode, the discharge length of the reactor is 100mm, and the discharge gap is 3mm; the power supply adopts a modulation pulse power supply; simulating industrial waste gas from N 2 、O 2 Toluene/ethyl acetate/acetone/p-xylene, in which O 2 20 percent, 200ppm of VOCs and 3L/min of flow rate; measuring VOCs, CO and CO at inlet and outlet of reactor by gas chromatography 2 And (4) concentration. When the energy density is 421J/L, the toluene removal rate can reach more than 90 percent at most, and CO is removed x The selectivity can reach 83 percent; the highest ethyl acetate removal rate can reach more than 95 percent, and CO x The selectivity can reach 92 percent; the highest acetone removal rate can reach more than 93 percent, and CO x The selectivity can reach 90 percent; the highest removal rate of p-xylene can reach more than 91 percent, and CO is removed x The selectivity can reach 83 percent.
Example 5:
MnO 2 the preparation of (1): the molar ratio of the raw materials is KMnO 4 : acetic acid solution = 2. Firstly diluting glacial acetic acid to a diluted acetic acid solution with a certain concentration by using deionized water, and then adding KMnO 4 Dissolving the mixture in a water solution, stirring the mixture for 4 hours at room temperature until a uniform solution is formed, and pouring the solution into a polytetrafluoroethylene-lined hydrothermal kettle for hydrothermal for 14 hours at 180 ℃, wherein the filling degree of the hydrothermal kettle is 70%. Washing the precipitate after hydrothermal treatment with deionized water until the pH value is 6.5, washing with absolute ethyl alcohol for 3 times to remove the organic matters on the surface, and drying the sample at 70 ℃ for later use.
Bi 4 O 5 Br 2 -MnO 2 In-situ preparation: the molar ratio of the raw materials is MnO 2 : anhydrous bismuth nitrate: potassium bromide = 9. MnO of 2 Respectively dissolving anhydrous bismuth nitrate and potassium bromide in appropriate amount of ethylene glycol, and stirring for 2 hr toMixing the obtained homogeneous solution/suspension, adding appropriate amount of anhydrous ethanol (the amount of anhydrous ethanol is 3 times of the total amount of ethylene glycol), stirring to obtain homogeneous suspension, and adding into a polytetrafluoroethylene-lined hydrothermal kettle at 200 deg.C for hydrothermal reaction for 12 hr with a filling degree of 70%. Washing the precipitate after hydrothermal treatment with deionized water to pH 6.5, washing with anhydrous ethanol for 3 times to remove the residual organic matter on the surface, and drying the sample at 70 deg.C to obtain Bi 4 O 5 Br 2 -MnO 2 And (3) compounding a catalyst.
Performance testing of the catalyst: the synthesized composite catalyst is coated on the surface of ground glass beads and filled in a discharge area of a dielectric barrier discharge reactor for degradation experiments of typical VOCs (toluene, ethyl acetate, acetone and paraxylene). In the embodiment, the plasma reactor is a coaxial cylindrical double-dielectric barrier discharge reactor, the inner and outer dielectrics are quartz, the outer diameter of the quartz outer tube is 25mm and the thickness is 2.5mm, the outer diameter of the quartz inner tube is 14mm and the thickness is 2mm, the surface of the quartz outer tube is tightly wound with a metal net as a ground electrode, the quartz inner tube is tightly filled with metal powder as a positive electrode, the discharge length of the reactor is 100mm, and the discharge gap is 3mm; the power supply adopts a modulation pulse power supply; simulating industrial waste gas from N 2 、O 2 Toluene/ethyl acetate/acetone/p-xylene, wherein O 2 20 percent, 200ppm of VOCs and 3L/min of flow rate; measuring VOCs, CO and CO at inlet and outlet of reactor by gas chromatography 2 And (4) concentration. When the energy density is 442J/L, the toluene removal rate can reach more than 95 percent at most, and CO is removed x The selectivity can reach 91 percent; the highest ethyl acetate removal rate can reach more than 97 percent, and CO x The selectivity can reach 96%; the acetone removal rate can reach more than 94 percent at most, and CO x The selectivity can reach 90%; the highest removal rate of p-xylene can reach more than 92 percent, and CO x The selectivity can reach 83 percent.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method for preparing a composite catalyst suitable for plasma characteristics is characterized by comprising the following steps:
step one, mnO 2 Preparation: potassium permanganate and acetic acid solution in certain molar ratio are fully mixed, and MnO is obtained after hydrothermal treatment, filtration, washing and drying 2 ；
Step two, bi 4 O 5 Br 2 -MnO 2 In-situ preparation: mnO with a certain molar ratio 2 Respectively dissolving anhydrous bismuth nitrate and potassium bromide in a proper amount of ethylene glycol, mixing the three solutions after respectively dissolving, adding a proper amount of anhydrous ethanol, continuously stirring until a uniform suspension is formed, carrying out hydrothermal treatment, filtering, washing and drying to obtain Bi 4 O 5 Br 2 -MnO 2 And (3) compounding a catalyst.
2. The method for preparing a composite catalyst suitable for plasma characteristics according to claim 1, wherein the molar ratio of potassium permanganate to acetic acid solution in the first step is 1.
3. The method of claim 1, wherein the step of one hydrothermal treatment is a heat treatment at 100 to 180 ℃ for 10 to 20 hours.
4. The method for preparing a composite catalyst suitable for plasma characteristics as claimed in claim 1, wherein the step one washing process comprises two processes of deionized water washing and ethanol washing at the same time, and the drying temperature is 60-90 ℃.
5. The method of claim 1, wherein the composite catalyst is prepared by a method suitable for plasma characteristicsIn the second step, the molar ratio of the anhydrous bismuth nitrate to the anhydrous potassium bromide is 1; soluble salt and MnO in the ethylene glycol solution 2 The concentration of the (A) is 0.1-1 mol/L; the dosage of the absolute ethyl alcohol is 1 to 5 times of the total amount of the ethylene glycol.
6. The method for preparing the composite catalyst suitable for plasma characteristics as claimed in claim 1, wherein in the step two hydrothermal treatment, the hydrothermal treatment is performed at 120-200 ℃ for 10-20 h, the washing process simultaneously comprises two processes of deionized water washing and ethanol washing, and the drying temperature is 60-90 ℃.
7. A composite catalyst suitable for plasma characteristics, which is produced by the method for producing a composite catalyst suitable for plasma characteristics according to any one of claims 1 to 6, wherein the composite catalyst suitable for plasma characteristics is Bi 4 O 5 Br 2 -MnO 2 A composite catalyst comprising Bi 4 O 5 Br 2 And MnO 2 A bifunctional component, bi 4 O 5 Br 2 And MnO 2 1 to 5.
8. The hybrid catalyst for plasma characterization according to claim 7 wherein the hybrid catalyst for plasma characterization is Bi in-situ synergistic with the plasma 4 O 5 Br 2 And MnO 2 The two catalytic components can respectively act on high-energy electrons and O of key active species in low-temperature plasma 3 And the organic compounds are fully utilized to generate strong oxidizing species, and typical VOCs are efficiently purified.
9. The hybrid catalyst adapted for plasma characteristics of claim 7, wherein MnO is 2 In situ assembled in Bi 4 O 5 Br 2 Flower-like microsphere surface.
10. Use of a composite catalyst suitable for plasma properties according to any one of claims 7 to 9 in the low temperature plasma catalytic oxidative degradation of VOCs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211360632.XA CN115888768A (en) | 2022-10-31 | 2022-10-31 | Composite catalyst suitable for plasma characteristics, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211360632.XA CN115888768A (en) | 2022-10-31 | 2022-10-31 | Composite catalyst suitable for plasma characteristics, preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115888768A true CN115888768A (en) | 2023-04-04 |
Family
ID=86491709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211360632.XA Pending CN115888768A (en) | 2022-10-31 | 2022-10-31 | Composite catalyst suitable for plasma characteristics, preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115888768A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108262050A (en) * | 2018-01-03 | 2018-07-10 | 东南大学 | A kind of two dimension composite visible light catalyst and preparation method and application |
| CN108855150A (en) * | 2018-05-07 | 2018-11-23 | 西南石油大学 | A kind of preparation method of the composite photo-catalyst of Photocatalytic Degradation of Phenol |
| CN111185204A (en) * | 2020-02-21 | 2020-05-22 | 东南大学 | Visible-light-driven photocatalyst, and preparation method and application thereof |
| WO2020116471A1 (en) * | 2018-12-03 | 2020-06-11 | 国立大学法人北海道大学 | Functional structure precursor and functional structure |
| CN111701601A (en) * | 2020-06-05 | 2020-09-25 | 南阳师范学院 | Bi4O5Br2Preparation method of self-assembled hollow flower ball and photocatalytic reduction of CO2Application of aspects |
| CN112495378A (en) * | 2020-11-25 | 2021-03-16 | 浙江大学 | Supported catalyst suitable for low-temperature plasma concerted catalysis process and preparation and application thereof |
-
2022
- 2022-10-31 CN CN202211360632.XA patent/CN115888768A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108262050A (en) * | 2018-01-03 | 2018-07-10 | 东南大学 | A kind of two dimension composite visible light catalyst and preparation method and application |
| CN108855150A (en) * | 2018-05-07 | 2018-11-23 | 西南石油大学 | A kind of preparation method of the composite photo-catalyst of Photocatalytic Degradation of Phenol |
| WO2020116471A1 (en) * | 2018-12-03 | 2020-06-11 | 国立大学法人北海道大学 | Functional structure precursor and functional structure |
| CN111185204A (en) * | 2020-02-21 | 2020-05-22 | 东南大学 | Visible-light-driven photocatalyst, and preparation method and application thereof |
| CN111701601A (en) * | 2020-06-05 | 2020-09-25 | 南阳师范学院 | Bi4O5Br2Preparation method of self-assembled hollow flower ball and photocatalytic reduction of CO2Application of aspects |
| CN112495378A (en) * | 2020-11-25 | 2021-03-16 | 浙江大学 | Supported catalyst suitable for low-temperature plasma concerted catalysis process and preparation and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| FEI CHANG ET AL.: "Strengthened photocatalytic removal of bisphenol a by robust 3D hierarchical n-p heterojunctions Bi4O5Br2-MnO2 via boosting oxidative radicals generation", 《CHEMICAL ENGINEERING JOURNAL》, 9 July 2021 (2021-07-09), pages 1 - 11 * |
| 潘瑜: "Bi4O5Br2复合催化剂的制备及其可见光催化降解 环丙沙星性能", 《中国优秀硕士学位论文 工程科技第I辑》, no. 1, 15 January 2021 (2021-01-15), pages 014 - 837 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111841554A (en) | Preparation method of composite metal oxide ozone catalyst | |
| CN106861626B (en) | Adsorption-photocatalysis dual-function material, preparation method thereof and application thereof in volatile organic gas treatment process | |
| CN113198515B (en) | Ternary photocatalyst and preparation method and application thereof | |
| Zhan et al. | In-situ growth of defect-enriched NiO film on nickel foam (NF@ NiO) monolithic catalysts for ozonation of gaseous toluene | |
| CN112387271B (en) | Carbon-coated manganous-manganic oxide composite material and preparation method and application thereof | |
| CN111185152A (en) | Multifunctional coupled PAC/Bi2O3/TiO2Method for preparing composite material | |
| CN108554458B (en) | Bismuth vanadate composite photocatalyst and preparation method thereof | |
| CN111617759B (en) | Manganese dioxide nano catalytic film for catalyzing ozone to degrade organic wastewater and preparation method thereof | |
| CN109675560A (en) | A kind of ceramsite catalyst and its preparation method and application that low-temperature plasma is modified | |
| CN113210003A (en) | Preparation method of composite visible-light-driven photocatalyst graphene quantum dot/graphite-phase nitrogen carbide | |
| CN115888768A (en) | Composite catalyst suitable for plasma characteristics, preparation method and application | |
| CN110302819B (en) | MOFs-derived bimetallic magnetic nanoporous carbon ozone catalyst and application thereof | |
| CN116655091A (en) | Method for removing organic pollutants in water body by utilizing Fe-N-C activated sulfite | |
| CN115715980A (en) | Mn 3 O 4 CNTs Fenton catalyst, preparation method and application thereof | |
| CN114870883B (en) | Hollow carbon-based Fe monoatomic catalyst and preparation method and application thereof | |
| CN112570024B (en) | Ag/AgCl/IL/FeOOH/AC photocatalytic material and preparation and application thereof | |
| CN114797847A (en) | Metal-doped mesoporous carbon-based catalyst and preparation method and application thereof | |
| Li et al. | Enhanced ozonation of pollutants by MgO nanoclusters/sewage sludge-derived hierarchical porous carbon: experimental and theoretical study | |
| CN113198461A (en) | Nano MnO2PTFE composite material and preparation method and application thereof | |
| CN114653172B (en) | Synergistic removal of VOCs and Hg 0 Is a method of (2) | |
| CN117504892B (en) | La-Fe co-doped SrTiO3/TiO2Composite material, preparation method and application thereof | |
| CN113231073B (en) | Nano CuO-MnO 2 Glass fiber composite material, and preparation method and application thereof | |
| CN114471565B (en) | Preparation method and application of zero-valent copper modified and enhanced zero-valent iron-carbon micro-electrolysis material | |
| CN115888694A (en) | Low-temperature plasma functional catalyst and preparation method thereof | |
| CN113634261B (en) | Waste water purification material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |