CN112705167A - Preparation method of MOF (Metal organic framework) modified activated carbon brick and application of MOF modified activated carbon brick in large-air-volume air filtration - Google Patents
Preparation method of MOF (Metal organic framework) modified activated carbon brick and application of MOF modified activated carbon brick in large-air-volume air filtration Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 186
- 239000011449 brick Substances 0.000 title claims abstract description 69
- 238000001914 filtration Methods 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000012621 metal-organic framework Substances 0.000 title claims description 59
- 239000006185 dispersion Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 239000002904 solvent Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 7
- 239000012855 volatile organic compound Substances 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- GPNNOCMCNFXRAO-UHFFFAOYSA-N 2-aminoterephthalic acid Chemical compound NC1=CC(C(O)=O)=CC=C1C(O)=O GPNNOCMCNFXRAO-UHFFFAOYSA-N 0.000 claims description 3
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 claims description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 3
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 3
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 125000000686 lactone group Chemical group 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000001632 sodium acetate Substances 0.000 claims description 3
- 235000017281 sodium acetate Nutrition 0.000 claims description 3
- 229910007932 ZrCl4 Inorganic materials 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- 239000013110 organic ligand Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 30
- 238000001179 sorption measurement Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 12
- 230000007547 defect Effects 0.000 abstract description 2
- 229910021389 graphene Inorganic materials 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 9
- 239000002131 composite material Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 229910007926 ZrCl Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000012924 metal-organic framework composite Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/223—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material containing metals, e.g. organo-metallic compounds, coordination complexes
- B01J20/226—Coordination polymers, e.g. metal-organic frameworks [MOF], zeolitic imidazolate frameworks [ZIF]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
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- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
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Abstract
The invention discloses a preparation method of an MOF modified activated carbon brick and application thereof in large-air-volume air filtration, wherein the method comprises the following steps: dispersing raw materials for preparing the MOF into a proper solvent, after uniform dispersion, immersing the porous block activated carbon brick into the dispersion liquid, carrying out MOF preparation reaction at a certain temperature, and drying after the reaction is finished to obtain the MOF modified porous block activated carbon brick air filter material. The method provided by the invention is simple and has strong operability. The obtained activated carbon brick air filter material has the high adsorption performance of MOF, overcomes the defect of overlarge wind resistance of the activated carbon filter material, and is suitable for filtering air with large wind volume.
Description
Technical Field
The invention relates to an air filter material, in particular to a preparation method of an MOF modified activated carbon brick and application thereof in large-air-volume air filtration.
Background
With the development of economy and the acceleration of industrialization, increasingly serious air pollution becomes an important problem to be solved urgently. The active carbon adsorption filtration technology is an important means for treating air pollution at present. The activated carbon material is amorphous carbon which is prepared by processing wood, fruit shell, coconut shell and the like under certain conditions of high temperature and pressure, has stronger adsorption capacity due to larger specific surface area and unique pore structure, and is widely applied to the field of air adsorption and purification. However, the active carbon filter element material with common components and structure has low adsorption efficiency and small adsorption capacity when large-air-volume air filtration is needed in some chemical plants, and particularly has large wind resistance, so that the application of the active carbon filter element material in the field of large-air-volume rapid air filtration is limited.
Metal Organic Framework (MOF) is a three-dimensional porous material developed rapidly in the last decade, and compared with traditional porous materials such as activated carbon and zeolite, MOF has various structures, simple preparation conditions and good designability, and thus plays an increasingly important role in a plurality of fields such as adsorption, catalysis and separation. Among many MOFs, materials such as ZIF, MIL, BUT have a very strong adsorption effect on VOCs in the air, have excellent removal performance and good stability, and are very ideal adsorption materials.
Chinese patent CN201710842749.4 discloses a preparation method of a graphene-modified activated carbon air filter material, which comprises the steps of crushing activated carbon, dispersing the crushed activated carbon and graphene into a solvent to form a mixed solution, and treating the mixed solution by using a spraying or hydrothermal method to obtain the graphene-modified activated carbon air filter material. Although the method has simple process, the used active carbon is in a powder state, and has large wind resistance when being used as an air filter material, so the method is not suitable for large-wind-volume air filtration.
Chinese patent 201910399936.9 discloses a method for preparing a graphene-activated carbon composite filter element, which is prepared by grafting and blending activated carbon and graphene components with other components at a certain temperature, and then wrapping and packaging a carbon rod by using a graphene non-woven fabric. By adding graphene and activated carbon for grafting modification, the original micropores are refined, and the filtering effect is enhanced. However, the filter element is mainly applied to domestic and industrial filtration water purification equipment.
Chinese patent 201811396279.4 discloses a graphene oxide modified activated carbon and a preparation method thereof, wherein graphene oxide, an auxiliary agent, a coupling agent and water are mixed to prepare a water dispersion liquid of graphene oxide; and then, immersing the granular activated carbon into the aqueous dispersion liquid of the graphene oxide, and carrying out high-speed stirring and heating reaction to obtain the graphene oxide modified activated carbon. Although the active carbon improves the filtering efficiency of heavy metal ions and polar organic matters, the active carbon is mainly applied to various water purification products.
Chinese patent 201510770753.5 provides a metal organic framework composite structure adsorption material, a preparation method and methane separation application thereof. The composite structure adsorbent is a heterogeneous coating structure, takes metal organic mineral building materials as a coating layer, and takes porous activated carbon, molecular sieves or a compound of the molecular sieves and the activated carbon as an internal coated layer. The adsorbent has excellent CH4-N2、CH4-CO2The adsorption separation performance can be used for methane purification adsorption materials, but the adsorption performance of other gases is not mentioned.
Chinese patent 201811318102.2 discloses a preparation method and application of an aluminum-based metal organic framework @ activated carbon composite material. The invention utilizes the pore structure of the active carbon and the crystallization process of the oxygen-containing functional group on the surface and the MOFs material, can generate a new crystal form between the active carbon and the MOFs crystal unit, and form a new pore channel. The composite material prepared by the method has a large specific surface area, and has more excellent performance in the aspect of adsorbing and removing VOCs compared with single MOFs and activated carbon. This invention is directed to powdered activated carbon and as such cannot be used in high air volume air filtration.
Disclosure of Invention
The invention aims to provide a preparation method of an MOF modified activated carbon brick and application of the MOF modified activated carbon brick in large-air-volume air filtration.
The purpose of the invention is realized by the following technical scheme:
the preparation method of the MOF modified activated carbon brick comprises the following steps:
adding raw materials for preparing MOF into a solvent for dissolving, and stirring to uniformly disperse the raw materials to prepare a dispersion liquid;
immersing the porous block activated carbon brick into the dispersion liquid;
heating to complex active groups in the activated carbon with the MOFs, the active groups including carbonyl groups, carboxyl groups, lactone groups, and/or hydroxyl groups;
after reacting for a certain time, standing for a period of time at normal temperature, and taking out the porous block activated carbon brick loaded with the MOF;
and cleaning the MOF-loaded porous block activated carbon brick with deionized water for 3-5 times, and drying in an oven at a certain temperature for a period of time to obtain the MOF-modified porous block activated carbon brick.
The prepared MOF modified activated carbon brick is used for adsorbing VOCs in large-air-volume air filtration.
According to the technical scheme provided by the invention, the preparation method of the MOF modified activated carbon brick and the application of the MOF modified activated carbon brick in large-air-volume air filtration have the advantages of simple method and strong operability. The obtained activated carbon brick air filter material has the high adsorption performance of MOF, overcomes the defect of overlarge wind resistance of the activated carbon filter material, and is suitable for filtering air with large wind volume.
Drawings
FIG. 1 is a photograph showing an example of an MOF-modified activated carbon block air filter according to the present invention.
FIG. 2 is an SEM picture of the surface of the porous block activated carbon brick before being modified.
FIG. 3 is a scanning electron microscope picture of the MOF modified porous block activated carbon brick air filter material, and it can be clearly seen that MOF particles are distributed on activated carbon.
FIG. 4 shows the condition of high wind volume (>1000m3And h) comparing the adsorption performance of the activated carbon and the MOF modified activated carbon to formaldehyde, and further improving the adsorption capacity and the quick response capacity of the activated carbon to formaldehyde gas after MOF modification.
Detailed Description
The embodiments of the present invention will be described in further detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
The preparation method of the MOF modified activated carbon brick has the following preferred specific implementation modes:
the method comprises the following steps:
adding raw materials for preparing MOF into a solvent for dissolving, and stirring to uniformly disperse the raw materials to prepare a dispersion liquid;
immersing the porous block activated carbon brick into the dispersion liquid;
heating to complex active groups in the activated carbon with the MOFs, the active groups including carbonyl groups, carboxyl groups, lactone groups, and/or hydroxyl groups;
after reacting for a certain time, standing for a period of time at normal temperature, and taking out the porous block activated carbon brick loaded with the MOF;
and cleaning the MOF-loaded porous block activated carbon brick with deionized water for 3-5 times, and drying in an oven at a certain temperature for a period of time to obtain the MOF-modified porous block activated carbon brick.
The MOF is one or more of zeolite imidazole framework material ZIF, dicarboxylic acid ligand zinc compound UIO and Leewasher framework MIL material.
The starting materials for making MOFs include organic ligands, soluble metal salts, and additives.
Raw materials for preparing ZIF include cobalt chloride and 2-methylimidazole;
the raw material for preparing UIO comprises ZrCl4And 2-amino terephthalic acid;
raw materials for MIL production include Cr (NO)3)3Terephthalic acid and sodium acetate.
The porous block activated carbon is a waterproof activated carbon brick with a honeycomb structure, and the aperture is 1-20 mm.
The heating reaction temperature is 30-200 ℃, and the drying temperature is 50-180 ℃.
The prepared MOF modified activated carbon brick is applied to adsorbing VOCs in air filtration with large air volume.
The preparation and the application of the MOF modified porous block activated carbon brick air filter material combine the porous block activated carbon brick and the MOF, have simple process, good repeatability and high adsorption capacity, and are suitable for filtering large-air-volume air.
The method specifically comprises the following steps:
a) adding raw materials for preparing the MOF into a proper solvent according to a proper proportion for dissolving, and stirring to uniformly disperse the raw materials;
b) immersing a porous block activated carbon brick into the dispersion liquid in the step a);
c) heating the dispersion liquid in the step b) to a certain temperature for carrying out MOF synthesis reaction, reacting for a certain time, standing for a period of time at normal temperature, and taking out the porous block activated carbon brick loaded with the MOF;
d) and cleaning the MOF-loaded porous block activated carbon brick with deionized water for 3-5 times, and drying in an oven at a certain temperature for a period of time to obtain the MOF-modified porous block activated carbon brick.
The graphene-MOF modified porous block activated carbon brick air filter material is applied to the adsorption of VOCs in the large air volume air filtration.
Compared with the prior art, the invention has the following beneficial effects:
the composite filter material prepared by the invention adopts the activated carbon brick with a porous structure, so that the wind resistance during air filtration can be effectively reduced, and air with large wind volume can rapidly pass through the composite filter material. Meanwhile, the filter element material disclosed by the invention combines the advantages of large MOF adsorption capacity and large pores of the porous activated carbon brick, and can ensure that air with large air volume can adsorb VOCs and the like while passing through the porous activated carbon brick quickly.
The specific embodiment, as shown in fig. 1 to 4:
example 1
The embodiment provides a preparation method of an MOF modified porous block activated carbon brick air filter material, which comprises the following steps:
1) dissolving cobalt chloride and 2-methylimidazole raw materials for preparing ZIF in methanol and uniformly dispersing;
2) putting the porous block activated carbon brick into the dispersion liquid in the step 1);
3) heating the dispersion liquid in the step 2) and the porous block activated carbon brick therein to 50 ℃ for reaction for 12 hours, then standing for 4 hours at normal temperature, and taking out the porous block activated carbon brick;
4) and (3) cleaning the modified porous block activated carbon brick with deionized water for 3-5 times, and drying at 80 ℃ to obtain the ZIF modified porous block activated carbon brick.
Example 2
The embodiment provides a preparation method of an MOF modified porous block activated carbon brick air filter material, which comprises the following steps:
1) ZrCl for preparing UIO material4And 2-amino terephthalic acid is dissolved in dimethyl formamide to be dispersed evenly;
2) putting the porous block activated carbon brick into the dispersion liquid in the step 1);
3) heating the dispersion liquid in the step 2) and the porous block activated carbon brick therein to 120 ℃ for reaction for 24 hours, then standing for 5 hours at normal temperature, and taking out the porous block activated carbon brick;
4) and (3) washing the modified porous block activated carbon brick with deionized water for 3-5 times, and drying at 60 ℃ to obtain the UIO modified porous block activated carbon brick.
Example 3
The embodiment provides a preparation method of an MOF modified porous block activated carbon brick air filter material, which comprises the following steps:
1) cr (NO) for preparing MIL material3)3Adding terephthalic acid and sodium acetate into the deionized water solution for uniform dispersion;
2) putting the porous block activated carbon brick into the dispersion liquid in the step 1);
3) heating the dispersion liquid in the step 2) and the porous block activated carbon brick therein to 140 ℃ for reaction for 12 hours, then standing for 3 hours at normal temperature, and taking out the porous block activated carbon brick;
4) and cleaning the modified porous block activated carbon brick with deionized water for 3-5 times, and drying at 70 ℃ to obtain the MIL modified porous block activated carbon brick.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A preparation method of an MOF modified activated carbon brick is characterized by comprising the following steps:
adding raw materials for preparing MOF into a solvent for dissolving, and stirring to uniformly disperse the raw materials to prepare a dispersion liquid;
immersing the porous block activated carbon brick into the dispersion liquid;
heating to complex active groups in the activated carbon with the MOFs, the active groups including carbonyl groups, carboxyl groups, lactone groups, and/or hydroxyl groups;
after reacting for a certain time, standing for a period of time at normal temperature, and taking out the porous block activated carbon brick loaded with the MOF;
and cleaning the MOF-loaded porous block activated carbon brick with deionized water for 3-5 times, and drying in an oven at a certain temperature for a period of time to obtain the MOF-modified porous block activated carbon brick.
2. The method of making a MOF modified activated carbon brick according to claim 1, wherein the MOF is one or more of ZIF, UIO, MIL.
3. The method of making a MOF modified activated carbon brick according to claim 2, wherein the raw materials for making MOFs comprise organic ligands, soluble metal salts and additives.
4. The method of making a MOF-modified activated carbon brick according to claim 3, wherein:
raw materials for preparing ZIF include cobalt chloride and 2-methylimidazole;
the raw material for preparing UIO comprises ZrCl4And 2-amino terephthalic acid;
raw materials for MIL production include Cr (NO)3)3Terephthalic acid and sodium acetate.
5. The preparation method of the MOF modified activated carbon brick according to claim 4, wherein the porous block activated carbon is a waterproof activated carbon brick with a honeycomb structure, and the pore diameter is 1-20 mm.
6. The method of making an MOF modified activated carbon brick according to claim 5, wherein the heating reaction temperature is 30-200 degrees and the drying temperature is 50-180 degrees.
7. Use of a MOF-modified activated carbon brick prepared according to any one of claims 1 to 6 for adsorbing VOCs in high air volume air filtration.
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