CN115350689A - Preparation method of IL @ MOF composite material and application of IL @ MOF composite material in gas adsorption separation - Google Patents

Preparation method of IL @ MOF composite material and application of IL @ MOF composite material in gas adsorption separation Download PDF

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CN115350689A
CN115350689A CN202210033382.2A CN202210033382A CN115350689A CN 115350689 A CN115350689 A CN 115350689A CN 202210033382 A CN202210033382 A CN 202210033382A CN 115350689 A CN115350689 A CN 115350689A
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imidazole
composite material
mof composite
drying
ionic liquid
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陈凤凤
聂诗宇
陈凯
高俊阔
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Zhejiang Sci Tech University ZSTU
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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
    • 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]
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • 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
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids

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Abstract

The invention relates to the technical field of synthesis of ionic liquid-metal organic framework composite materials (IL @ MOF), and provides a method for applying to CO 2 Novel composite materials separated by adsorption. The preparation method comprises the following steps: exchanging the imidazole bromide salt solution by 550A (OH) anion exchange resin to obtain a corresponding alkali solution; neutralizing the obtained imidazole alkali solution with glacial acetic acid, stirring for a period of time, and performing rotary evaporation and drying to obtain imidazole acetate ionic liquid for later use; reacting ZrCl 4 And dissolving terephthalic acid and imidazole acetate in N, N-dimethylformamide, carrying out oil bath reaction for 4 hours, centrifuging, washing and drying to obtain the imidazole acetate @ UiO-66 composite material. The ionic liquid in the method has wide selection range and is suitable for CO 2 The method has universality of capture and gas separation; and a process for the preparation thereofSimple, simple and quick to operate, green and environment-friendly, and low in cost.

Description

Preparation method of IL @ MOF composite material and application of IL @ MOF composite material in gas adsorption separation
Technical Field
The invention relates to the field of preparation and application of composite materials, in particular to a preparation method of an IL @ MOF composite material and application of the IL @ MOF composite material in gas adsorption separation
Background
With the continuous development of global industrialization, fossil fuel is usedLarge-scale combustion of materials leads to CO in the atmosphere 2 The concentration does not rise newly, resulting in greenhouse effect and climate change. How to capture CO in air with high efficiency and low energy consumption 2 Becomes the key point of the current domestic and foreign research. Enriching CO from conventional absorption separation 2 Compared with the prior art, the adsorption method is regarded as CO with great industrial application prospect due to the advantages of small corrosion, low energy consumption, strong compatibility with the existing equipment and the like 2 Separation techniques. Among the adsorbents, ionic liquids have the advantages of extremely low saturated vapor pressure, excellent thermal stability and adjustable structure, and become CO 2 However, the absorption sites of the ionic liquid are limited, the absorption mass fraction is small, the viscosity of the ionic liquid after absorption can be increased rapidly to form a huge hydrogen bond network, the viscosity after absorption is increased by 240 times, and the gas absorption mass transfer rate is seriously influenced. The high viscosity and low diffusion coefficient of ionic liquids lead to undesirable effects in the direction of absorption and separation of carbon dioxide. The UiO-66 has the advantages of large specific surface area, high stability, strong modifiability and the like, but the MOFs has the effect of CO 2 The adsorption of (2) is physical adsorption, in low CO 2 The adsorption capacity under partial pressure is very small.
Aiming at the problem, imidazole acetate ionic liquid is packaged in UiO-66 to prepare imidazole acetate @ UiO-66 composite material with high CO at normal pressure 2 The ionic liquid is used as a guest molecule and added into pores of the MOFs, so that the gas affinity of the MOFs is adjusted. With the introduction of IL, the porosity of MOFs can be modulated, new adsorption sites can be created, and the molecular sieve performance of MOFs is improved. With IL incorporation, CO 2 Is more obviously changed, resulting in CO 2 The selectivity is enhanced.
Application to CO has been reported so far 2 There are many kinds of materials for adsorptive separation. Ban synthesizes imidazole group ionic liquid [ Bmim ] through in-situ ionothermal synthesis][Tf 2 N]Enclosing in ZIF-8 SOD cage, thereby adjusting ZIF-8 effective pore size to CO 2 And N 2 In the meantime. Ionic liquid modified ZIF-8 mixed matrix membrane in CO 2 /N 2 And CO 2 /CH 4 The separation aspect exhibits a significant combination of permeability and selectivity, exceeding the upper limit of polymer membranes. [ Yujie Ban, zhengjie Li, yanshuo Li, yuan Pen, hua Jin, wenmei Jiano, ang Guo, po Wang, qingyuan Yang, chonggli Zhong, and Weishen Yang. Conditioning of Ionic Liquids in Nanocages: taiiling the Molecular profiling Properties of ZIF-8for Membrane-Based CO 2 Capture.Angew.Chem.2015,54(51):15483-15487]. Jocasta Avila et al prepared a novel porous ionic liquid based on a ZIF-8 metal organic framework and a phosphonium acetate or levulinate salt and showed a strong carbon dioxide adsorption capacity at low pressure. The porous suspension based on the levulinic acid phosphine ionic liquid can absorb 103 percent more carbon dioxide than pure ZIF-8 in unit mass under the conditions of 1bar and 303k, and the reasonable combination of MOFs and the ionic liquid is shown to greatly enhance the absorption of the carbon dioxide under low pressure. [ Jocasta Avila, L.Fernando Lepre, catherine C.Santini, martin Tiano, sandrine Denis-Quan quin, kai Chung Szeto, agilio A.H.Padua, and Margarida Costa Gome.high-Performance ports Ionic Liquids for Low-Pressure CO 2 Capture.Angew.Chem.2021,60(23):12876-12882]. In combination with the above, various applications to CO 2 Adsorbed composite material, increased CO 2 The adsorption amount of (A) is mostly physical adsorption, the adsorption amount is small, and the utilization rate is low, so that the method for preparing the catalyst has high CO content 2 Adsorption of ionic liquid-metal organic framework composites remains a significant challenge.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to develop high CO 2 An adsorbed amount of the novel composite material. The purpose of the invention is realized based on the following technical scheme:
a preparation method of an IL @ MOF composite material comprises the following steps:
s1, exchanging an imidazole bromide salt solution through 550A (OH) anion exchange resin to obtain an imidazole alkali liquor;
s2, neutralizing the obtained alkali solution with glacial acetic acid, stirring for a period of time, and performing rotary evaporation and drying to obtain imidazole acetate ionic liquid for later use;
S3、reacting ZrCl 4 And dissolving terephthalic acid and imidazole acetate ionic liquid in a solvent, carrying out oil bath reaction for 4 hours, and carrying out centrifugal filtration, washing and drying to obtain the imidazole acetate @ UiO-66 composite material.
Preferably, the solvent in step S3 is one or more of water, ethanol, N-dimethylformamide, cyclohexane, toluene, dichloromethane, tetrahydrofuran, and ethyl acetate.
Preferably, the method for preparing the alkali liquor in the step S1 comprises: weighing 10-20g of imidazole bromide salt, dissolving in 7-30mL of distilled water, passing through an alkaline ion exchange column, wherein the speed of the effluent liquid is 2-3 seconds per drop, collecting the effluent liquid, and stopping collecting when the effluent liquid becomes weak alkaline, wherein the obtained solution is the alkali liquor.
Preferably, the step S2 specifically includes: the imidazole alkali solution obtained by the basic ion exchange resin is subjected to concentration calibration by using a potassium hydrogen phthalate standard solution, the amount of alkali is calculated, equimolar glacial acetic acid is added, the imidazole alkali solution and the glacial acetic acid are subjected to acid-alkali neutralization reaction in an equimolar manner, and the ionic liquid is prepared after stirring, rotary evaporation and drying.
Preferably, in the step S2, the stirring temperature is 10-20 ℃, the stirring time is 10-36 h, the rotary evaporation temperature is 75 ℃, and the drying temperature is 60-80 DEG C
Preferably, the oil bath temperature in the step S3 is 120 ℃, the washing is water, and/or methanol, and/or N, N-dimethylformamide washing, and the drying temperature is 70-100 ℃.
An IL @ MOF composite material prepared according to the method.
Preferably, the method is applied to carbon dioxide adsorption separation.
Preferably, the adsorption capacity of the carbon dioxide is 55-70cm 3 In terms of/g, the selectivity is from 95 to 98%.
Compared with the prior art, the invention can obtain at least one of the following beneficial effects:
1. according to the invention, through a limited-domain ionic thermal method, ionic liquid is placed in MOFs pore channels for domain limitation, the ionic liquid is used for replacing a regulator required by acetic acid in the UiO-66 synthesis process, IL @ UiO-66 is used for adsorption separation of carbon dioxide, and the ionic liquid-metal organic framework composite material prepared by the limited-domain ionic thermal method has the advantages of more dispersed particles, adjustable particle size and adjustable loading capacity compared with a composite material prepared by an impregnation method, and has a very good practical application value.
2. The preparation method disclosed by the invention is simple and rapid to operate, green and environment-friendly, and low in cost.
3. The IL @ MOF material prepared by the invention is applied to CO 2 The adsorption separation aspect has excellent adsorption performance and strong applicability.
Drawings
FIG. 1 is an XRD pattern of [ Emim ] [ AC ] @ UiO-66 obtained in examples and comparative examples;
FIG. 2 shows Emim obtained in examples and comparative examples][AC]@ UiO-66 composite in CO 2 Performance profile in adsorption.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
(1) Weighing EmimBr (20 g) and dissolving in distilled water, carrying out ion exchange on the EmimBr in alkaline ion exchange resin to obtain an EmimOH solution, and calibrating the concentration of the alkaline solution by using potassium hydrogen phthalate; respectively taking 1mmol of EmimOH and 1mmol of HAc for neutralization reaction, stirring for 24h at room temperature, performing rotary evaporation to remove a large amount of water, and placing in an oven at 80 ℃ for vacuum drying for 48h to obtain [ Emim ] [ Ac ];
(2) Terephthalic acid (0.615 mmol) and ZrCl are added 4 (0.615 mmol) and [ Emim][Ac](50 mg) was added to DMF (50 mL), dissolved by sonication for 15min, the mixture was transferred to a Schlenk tube and subjected to oil bath at 120 ℃ for 4h, followed by filtration and DMF washingDrying for 3 times, and vacuum drying at 80 deg.C to obtain Emim][Ac]@UiO-66。
Example 2
(1) Weighing EmimBr (20 g) and dissolving the EmimBr in distilled water, carrying out ion exchange on the EmimBr in alkaline ion exchange resin to obtain an EmimOH solution, and calibrating the concentration of the alkaline solution by using potassium hydrogen phthalate; respectively taking 1mmol of EmimOH and 1mmol of HAc for neutralization reaction, stirring for 24h at room temperature, performing rotary evaporation to remove a large amount of water, and placing in an oven at 80 ℃ for vacuum drying for 24h to obtain [ Emim ] [ Ac ];
(2) Terephthalic acid (0.615 mmol) and ZrCl are added 4 (0.615 mmol) and [ Emim][Ac](25 mg) is added into DMF (50 mL), dissolved by ultrasonic for 15min, the mixed solution is transferred into a Schlenk tube, oil bath is carried out, the reaction temperature is 120 ℃ for 4h, and then filtration, DMF washing for 3 times, drying and vacuum drying at 80 ℃ are carried out to obtain [ Emim ℃][Ac]@UiO-66。
Example 3
(1) Weighing EmimBr (20 g) and dissolving the EmimBr in distilled water, carrying out ion exchange on the EmimBr in alkaline ion exchange resin to obtain an EmimOH solution, and calibrating the concentration of the alkaline solution by using potassium hydrogen phthalate; respectively taking 1mmol of EmimOH and 1mmol of HAc for neutralization reaction, stirring for 24h at room temperature, performing rotary evaporation to remove a large amount of water, and placing in an oven at 80 ℃ for vacuum drying for 24h to obtain [ Emim ] [ Ac ];
(2) Terephthalic acid (0.615 mmol) and ZrCl are added 4 (0.615 mmol) and [ Emim][Ac](75 mg) is added into DMF (50 mL), dissolved by ultrasonic for 15min, the mixed solution is transferred into a Schlenk tube, oil bath is carried out, the reaction temperature is 120 ℃ for 4h, and then filtration, DMF washing for 3 times, drying and vacuum drying at 80 ℃ are carried out to obtain [ Emim ℃][Ac]@UiO-66。
Example 4
(1) Weighing EmimBr (20 g) and dissolving the EmimBr in distilled water, carrying out ion exchange on the EmimBr in alkaline ion exchange resin to obtain an EmimOH solution, and calibrating the concentration of the alkaline solution by using potassium hydrogen phthalate; respectively taking 1mmol of EmimOH and 1mmol of HAc for neutralization reaction, stirring for 24h at room temperature, performing rotary evaporation to remove a large amount of water, and placing in an oven at 80 ℃ for vacuum drying for 24h to obtain [ Emim ] [ Ac ];
(2) Terephthalic acid (0.615 mmol) and ZrCl are added 4 (0.615 mmol) and [ Emim][Ac](100 mg) is added into DMF (50 mL), ultrasonic treatment is carried out for 15min for dissolution, the mixed solution is transferred into a Schlenk tube for oil bath, the reaction temperature is 120 ℃ for 4h, and then filtration, DMF washing for 3 times, drying and vacuum drying at 80 ℃ are carried out to obtain [ Emim ]][Ac]@UiO-66。
Example 5
(1) Weighing BmimBr (20 g), dissolving in distilled water, carrying out ion exchange on the solution by using alkaline ion exchange resin to obtain a BmimOH solution, and calibrating the concentration of the alkaline solution by using potassium hydrogen phthalate; respectively taking 1mmol of Bmim OH and 1mmol of HAc for neutralization reaction, stirring for 24h at room temperature, performing rotary evaporation to remove a large amount of water, and placing in an oven at 80 ℃ for vacuum drying for 24h to obtain [ Bmim ] [ Ac ];
(2) Terephthalic acid (0.615 mmol) and ZrCl are added 4 (0.615 mmol) and [ Bmim ]][Ac]Adding (50 mg) into DMF (50 mL), dissolving with ultrasound for 15min, transferring the mixture into Schlenk tube, performing oil bath at 120 deg.C for 4 hr, filtering, washing, drying, and vacuum drying at 80 deg.C to obtain [ Bmim ]][Ac]@UiO-66。
Example 6
(1) Weighing and dissolving OmimBr (20 g) in distilled water, carrying out ion exchange on the OmimBr in alkaline ion exchange resin to obtain an OmimOH solution, and calibrating the concentration of the alkaline solution by using potassium hydrogen phthalate; respectively taking 1mmol of Omimoh and 1mmol of HAc for neutralization reaction, stirring at room temperature for 24h, removing a large amount of water by rotary evaporation, and placing in an oven at 80 ℃ for vacuum drying for 24h to obtain [ Omim ] [ Ac ];
(2) Terephthalic acid (0.615 mmol) and ZrCl are added 4 (0.615 mmol) and [ Omim][Ac](50 mg) was added to DMF (50 mL), dissolved by sonication for 15min, the mixture was transferred to a Schlenk tube and subjected to oil bath at 120 ℃ for 4h, followed by filtration, washing, drying and vacuum drying at 80 ℃ to give [ Omim ℃][Ac]@UiO-66。
Comparative example 1
The comparison is that the ionic liquid-metal organic framework composite material is prepared by an immersion method:
(1) Terephthalic acid (5 mmol) and ZrCl 4 Adding (0.615 mmol) and glacial acetic acid 6mL into DMF (50 mL), dissolving with ultrasound for 15min, transferring the mixture into Schlenk tube, performing reaction oil bath at reaction temperatureAt the temperature of 120 ℃ for 4 hours, and then filtering, washing, drying and activating to obtain a UiO-66 material;
(2) Weighing EmimBr (20 g) and dissolving in distilled water, carrying out ion exchange on the EmimBr in alkaline ion exchange resin to obtain an EmimOH solution, and calibrating the concentration of the alkaline solution by using potassium hydrogen phthalate; respectively taking 1mmol of EmimOH and 1mmol of HAc for neutralization reaction, stirring for 24h at room temperature, rotary evaporating to remove a large amount of water, and placing in an oven at 80 ℃ for vacuum drying for 24h to obtain [ Emim ] [ Ac ]
(3) Weighing [ Emim ] [ Ac ] (50 mg) in the step (2), dispersing in 100mL of ethanol solution, adding the UiO-66 (150 mg) in the step (1), placing at 25 ℃, stirring for 24h, vacuumizing, and drying to obtain a material [ Emim ] [ Ac ] @ UiO-66.
The following are structural characterization and performance tests:
[ Emim ] [ Ac ] @ UiO-6 prepared in the examples is marked as 1# [ Emim ] [ Ac ] @ UiO-6, the comparative example is marked as 2# [ Emim ] [ Ac ] @ UiO-66,
1. XRD powder diffraction test was performed, and CO 2 And (5) adsorption and desorption isotherm testing.
1. The XRD powder diffraction test results show that the powder diffraction results of [ Emim ] [ Ac ] @ UiO-66 obtained in examples and comparative examples are shown in FIG. 1, and it can be seen from the results of FIG. 1 that the diffraction peaks of examples and comparative examples are consistent with those of UiO-66.
2. The composite materials [ Emim ] [ Ac ] @ UiO-66 prepared in the examples and the comparative examples were subjected to carbon dioxide adsorption performance tests, and the experimental results are shown in Table 1.
TABLE 1
Sample (I) CO 2 Adsorption capacity (cm) 3 /g)
1#[Emim][Ac]@UiO-66 56
2#[Emim][Ac]@UiO-66 45
UiO-66 43
As can be seen from the data in Table 1, [ Emim ] prepared according to the present invention][Ac]@ UiO-66 composite material for CO 2 Has good adsorptivity and selectivity; to CO 2 The adsorption amount of (2) reaches 56cm 3 Per g, as shown in FIG. 2, the composite prepared according to the invention versus CO compares to UiO-66 and the comparative example of the impregnation method 2 The adsorption capacity is obviously improved. The adsorption capacity of carbon dioxide is 55-70cm 3 In terms of/g, the selectivity is from 95 to 98%.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (9)

1. A preparation method of an IL @ MOF composite material is characterized by comprising the following steps:
s1, exchanging an imidazole bromide salt solution by 550A (OH) anion exchange resin to obtain an imidazole alkali solution;
s2, neutralizing the obtained alkali solution with glacial acetic acid, stirring for a period of time, and performing rotary evaporation and drying to obtain imidazole acetate ionic liquid for later use;
s3, mixing ZrCl 4 And dissolving terephthalic acid and imidazole acetate ionic liquid in a solvent, carrying out oil bath reaction for 4 hours, and carrying out centrifugal filtration, washing and drying to obtain the imidazole acetate @ UiO-66 composite material.
2. The method of making the il @ mof composite of claim 1, wherein the solvent in step S3 is one or more of water, ethanol, N-dimethylformamide, cyclohexane, toluene, dichloromethane, tetrahydrofuran, ethyl acetate.
3. The method for preparing the IL @ MOF composite material according to claim 1, wherein the method for preparing the alkali liquor in the step S1 is as follows: weighing 10-20g of imidazole bromide salt, dissolving in 7-30mL of distilled water, passing through an alkaline ion exchange column, wherein the speed of the effluent liquid is 2-3 seconds per drop, collecting the effluent liquid, and stopping collecting when the effluent liquid becomes weak alkaline, wherein the obtained solution is the alkali liquor.
4. The method for preparing the IL @ MOF composite material according to claim 1, wherein the step S2 is specifically carried out by: the imidazole alkali solution obtained by the basic ion exchange resin is subjected to concentration calibration by using a potassium hydrogen phthalate standard solution, the amount of alkali is calculated, glacial acetic acid with the same mole is added to perform acid-base neutralization reaction with the glacial acetic acid with the same mole, and the ionic liquid is prepared by stirring, rotary steaming and drying.
5. The method for preparing the IL @ MOF composite material according to claim 1, wherein the stirring temperature in the step S2 is 10-20 ℃, the stirring time is 10-36 h, the rotary evaporation temperature is 75 ℃, and the drying temperature is 60-80 ℃.
6. The method of producing an il @ mof composite according to claim 1, wherein the oil bath temperature in step S3 is 120 ℃, the washing is water, and/or methanol, and/or N, N-dimethylformamide washing, and the drying temperature is 70 to 100 ℃.
7. An il @ mof composite prepared according to the method of claims 1-7.
8. The IL @ MOF composite material of claim 8, applied for carbon dioxide adsorptive separation.
9. The il @ mof composite of claim 9, wherein the amount of adsorption of carbon dioxide is 55-70cm 3 In terms of/g, the selectivity is from 95 to 98%.
CN202210033382.2A 2022-01-12 2022-01-12 Preparation method of IL @ MOF composite material and application of IL @ MOF composite material in gas adsorption separation Pending CN115350689A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116272895A (en) * 2023-02-10 2023-06-23 浙江理工大学 Core-shell type IL/ZIF-8 material, preparation method thereof and application thereof in CO2 separation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116272895A (en) * 2023-02-10 2023-06-23 浙江理工大学 Core-shell type IL/ZIF-8 material, preparation method thereof and application thereof in CO2 separation

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