Coordination polymer as well as preparation method and application thereof

Abstract

The invention relates to the technical field of carbon dioxide adsorption, and discloses a coordination polymer and a preparation method and application thereof, the coordination polymer has a structure as shown in formula (1), R is selected from-NH2,-alkyl-NH2, and M1, M2 and M3 are respectively and independently selected from at least one of Mg, Co, Cu, Cr, Ca, Zn, Fe and Al. The coordination polymer can adsorb carbon dioxide under the conditions of normal temperature and low pressure. # imgabs0 #

Description

Technical Field

[0001] The invention relates to the technical field of carbon dioxide adsorption, and in particular to a coordination polymer and a preparation method and application thereof. Background Art

[0003] In recent years, the energy used by humans is transitioning from non-renewable energy to clean energy (such as energy generated by biomass). However, it will take a long time to achieve the industrialization of clean energy. The current industrial carbon dioxide capture technology is firstly liquid amine solution absorption, which has been used to separate carbon dioxide from natural gas and hydrogen since 1930. For example, monoethanolamine (MEA) is used to absorb carbon dioxide, remove carbon dioxide by converting it into bicarbonate species, and effectively store it in a liquid absorbent. This method has high selectivity and the reaction is reversible. Amine regeneration is usually achieved by heating a solution rich in carbon dioxide. However, using this method, the defects of high energy input, solvent loss and amine volatilization during the heating desorption process limit its further development. At the same time, carbonic acid will be produced in the presence of water, which will cause gradual corrosion of the absorption equipment. Therefore, the frequency of replacement of the absorbent is much higher, which directly leads to an increase in the operating cost of actual operation. The second is cryogenic distillation and membrane separation technology. Cryogenic distillation is a method of separating and purifying carbon dioxide after carbon dioxide is condensed at low temperature. It is suitable for the transportation of high-pressure partial pressure carbon dioxide gas and can directly produce liquid carbon dioxide for transportation, storage or use. Membrane separation is based on the principle of selective gas permeation, because carbon dioxide is easy to permeate, while other gases, such as hydrocarbon molecules, diffuse relatively slowly. The amine washing method and the low temperature method can directly purchase raw materials in actual production applications, but their regeneration or refrigeration process consumes a lot of energy. Although the use of membranes to separate gases is simple and green, the core component membrane needs to be highly integrated throughout the area, which is technically quite challenging. Therefore, physical adsorption separation of carbon dioxide is low-energy and easy to regenerate, and is the main development direction in the future.

[0004] Different types of carbon capture agents have been proposed, including zeolites, activated carbon, metal organic frameworks (MOFs), metal oxides, silica, lithium zirconate, etc., to achieve carbon capture and sequestration through adsorption, which is crucial for large-scale applications. At the same time, conditions such as sustainability, stability, loading capacity, regeneration conditions, density, and hydrophobic / hydrophilic properties must also be considered.

[0005] In industry, CO 2 and N 2 Separation in flue gas mixture. For coal-fired plants, the flue gas produced by burning coal in air contains 15-16% CO 2 , the main component is N2 , and contains a small amount of other components (such as H 2 O, O 2 , CO, NO x and SO x etc.). The total pressure of flue gas mixture is 1 bar. Sulfide SO x The removal occurs in CO 2 Before the capture of 2 The temperature in the collection device is between 40℃ and 60℃. Therefore, for the above mixed gas, the ideal CO 2 The capture agent should have high CO at low pressure. 2 Selectivity, high CO 2 The absorption capacity should be high, and it should have good thermal stability at the operating temperature, while the energy required for its own heating and regeneration should be as low as possible. Summary of the invention

[0006] The purpose of the present invention is to overcome the existing solid CO 2 To solve the problem that the carbon dioxide capture ability of the capture agent is poor under low pressure, a coordination polymer and a preparation method and application thereof are provided.

[0007] In order to achieve the above object, the first aspect of the present invention provides a coordination polymer having a structure shown in formula (1):

[0008]

[0009] Wherein, R is selected from -NH 2 , -alkyl-NH 2 , M 1 、M 2 and M 3 Each is independently selected from at least one of Mg, Co, Cu, Cr, Ca, Zn, Fe and Al.

[0010] The second aspect of the present invention provides a method for preparing a coordination polymer, the method comprising: in the presence of a solvent, allowing a metal precursor to undergo a coordination reaction with a ligand, wherein the metal precursor is a precursor of at least one metal selected from the group consisting of Mg, Co, Cu, Cr, Ca, Zn, Fe and Al, and the ligand has a structure as shown in formula (2):

[0011]

[0012] Wherein, R is selected from -NH 2 , -alkyl-NH 2 , preferably, R is selected from -NH 2 , -C 1 -C10 Alkyl-NH 2 , more preferably -NH 2 , -C 1 -C 6 Alkyl-NH 2 .

[0013] The third aspect of the present invention provides a coordination polymer prepared by the method described above.

[0014] The fourth aspect of the present invention provides the use of the coordination polymer described above and / or the coordination polymer prepared by the method described above in the adsorption of carbon dioxide.

[0015] The fifth aspect of the present invention provides the above-mentioned method for adsorbing carbon dioxide, which comprises: contacting a gas containing carbon dioxide with the above-mentioned coordination polymer to adsorb carbon dioxide.

[0016] Through the above technical solution, the present invention achieves the following beneficial effects:

[0017] (1) The existing carbon dioxide liquid absorbent has the disadvantages of large solvent loss, easy volatilization of amines that endangers workers' health, and easy corrosion of equipment. The coordination polymer of the present invention is a solid material, which does not have the problem of volatilization and loss and corrosion of equipment. In addition, the coordination polymer of the present invention has a strong adsorption effect on carbon dioxide and a weak adsorption effect on nitrogen.

[0018] (2) The solid carbon dioxide adsorbent in the prior art can only adsorb carbon dioxide at low temperature (below 10°C, about 0°C) and high pressure (above 1MPa), while the coordination polymer of the present invention can adsorb carbon dioxide at room temperature and low pressure. Generally, the higher the pressure, the greater the amount of gas adsorbed by the adsorbent.

[0019] (3) The preparation method of the coordination polymer of the present invention is simple, and the adsorption capacity of carbon dioxide is large, which can effectively reduce the cost of carbon dioxide capture and is more conducive to large-scale industrial use. In addition, the material can be reused repeatedly, which is more environmentally friendly and has lower costs. It has a very broad application prospect in future industrial applications.

[0020] (4) The coordination polymer of the present invention has high stability and can exist at 300-450° C. without decomposition. The coordination polymer of the present invention can be heated to remove adsorbed carbon dioxide, thereby achieving the reuse of the coordination polymer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a scanning electron microscope image of the coordination polymer prepared in Example 1;

[0022] Figure 2is a scanning electron microscope image of the coordination polymer prepared in Example 1;

[0023] Figure 3 This is the adsorption curve of carbon dioxide by the coordination polymer prepared in Example 2. DETAILED DESCRIPTION

[0024] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0025] The first aspect of the present invention provides a coordination polymer having a structure shown in formula (1):

[0026]

[0027] Wherein, R is selected from -NH 2 , -alkyl-NH 2 , M 1 、M 2 and M 3 Each is independently selected from at least one of Mg, Co, Cu, Cr, Ca, Zn, Fe and Al.

[0028] The coordination polymer of the present invention is composed of an organic bridging ligand and an inorganic node (metal base), which are connected by coordination bonds to form a three-dimensional extended network. 2+ Cr 3+ 、Zn 2+ , Cu 2+ , Fe 2+ or Al 3+ The inventors speculate that the reason why the coordination polymer of the present invention can have a higher carbon dioxide adsorption capacity and a lower nitrogen adsorption capacity may be that -OM in the coordination polymer 3 The bonding of the groups is disturbed by carbon dioxide, which will open the OM during the adsorption process. 3 key, thereby increasing the adsorption of carbon dioxide.

[0029] According to the present invention, preferably, R is selected from -NH 2 , -C 1 -C 10 Alkyl-NH 2 , more preferably -NH 2 , -C 1 -C6 Alkyl-NH 2 .

[0030] In the present invention, -C 1 -C 10 Alkyl-NH 2 It can be -methyl-NH 2 , -ethyl-NH 2 , -propyl-NH 2 , -butyl-NH 2 , -pentyl-NH 2 , -Hexyl-NH 2 、-heptyl-NH 2 , -Octyl-NH 2 , -Decyl-NH 2 、-Nonyl-NH 2 In the present invention, C 1 -C 10 The alkyl group may be a linear alkyl group or a branched alkyl group.

[0031] In the present invention, R can be selected from -NH 2 、-CH 2 NH 2 、-CH 2 CH 2 NH 2 、-CH 2 CH 2 CH 2 NH 2 、-CH 2 CH 2 CH 2 CH 2 NH 2 、-CH 2 CH 2 CH 2 CH 2 CH 2 NH 2 .

[0032] According to the present invention, preferably, the coordination polymer has a structure shown in formula (1-1):

[0033]

[0034] In formula (1-1), R, M 1 、M 2 and M 3 As defined above.

[0035] The second aspect of the present invention provides a method for preparing a coordination polymer, the method comprising: in the presence of a solvent, allowing a metal precursor to undergo a coordination reaction with a ligand, wherein the metal precursor is a precursor of at least one metal selected from the group consisting of Mg, Co, Cu, Cr, Ca, Zn, Fe and Al, and the ligand has a structure as shown in formula (2):

[0036]

[0037] Wherein, R is selected from -NH 2 , -alkyl-NH 2 , preferably, R is selected from -NH 2 , -C 1 -C 10 Alkyl-NH 2 , more preferably -NH 2 , -C 1 -C 6 Alkyl-NH 2 .

[0038] According to the present invention, preferably, the solvent is at least one of N,N-dimethylformamide, dioxane, toluene, dimethyl sulfoxide and tetrahydrofuran.

[0039] According to the present invention, preferably, the metal precursor is a metal salt, preferably a metal nitrate and / or a metal chloride, more preferably at least one of magnesium nitrate, cobalt nitrate, copper nitrate, chromium nitrate and calcium nitrate.

[0040] According to the present invention, preferably, the molar ratio of the metal precursor to the ligand calculated as the metal element is 1:0.1-10 (for example, 1:0.1, 1:0.3, 1:0.4, 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:2, 1:3, 1:5, 1:10, and the range formed by any two of the above points), more preferably 1:0.3-3.

[0041] According to the present invention, preferably, the amount of solvent used per gram of ligand is 80-500 mL (for example, 80 mL, 100 mL, 120 mL, 140 mL, 160 mL, 170 mL, 180 mL, 200 mL, 250 mL, 300 mL, 400 mL, 500 mL, and ranges consisting of any two of the above).

[0042] According to the present invention, preferably, the conditions of the coordination reaction include: a temperature of 50-200°C (for example, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 200°C, and a range formed by any two of the above), and a time of 0.5-72h (for example, 0.5h, 5h, 10h, 20h, 22h, 24h, 26h, 30h, 40h, 50h, 60h, 72h, and a range formed by any two of the above).

[0043] The third aspect of the present invention provides a coordination polymer prepared by the method described above.

[0044] The fourth aspect of the present invention provides the use of the coordination polymer described above and / or the coordination polymer prepared by the method described above in the adsorption of carbon dioxide.

[0045] The fifth aspect of the present invention provides the above-mentioned method for adsorbing carbon dioxide, which comprises: contacting a gas containing carbon dioxide with the above-mentioned coordination polymer to adsorb carbon dioxide.

[0046] According to the present invention, preferably, the adsorption conditions include: a temperature of 273-323K (for example, 273K, 283K, 290K, 293K, 295K, 300K, 305K, 310K, 320K, 323K, and a range consisting of any two of the above), and a pressure of 0.1-1MPa (for example, 0.1MPa, 0.13MPa, 0.15MPa, 0.17MPa, 0.2MPa, 0.3MPa, 0.4MPa, 0.5MPa, 1MPa, and a range consisting of any two of the above). The pressure in the present invention is a gauge pressure.

[0047] The present invention will be described in detail below by way of examples. In the following examples,

[0048] The test process of the physical adsorption instrument is: degassing at room temperature (about 25°C) and 0.01MPa for 5 hours, and then testing the adsorption curve of nitrogen or carbon dioxide at room temperature.

[0049] The thermal decomposition temperature of the coordination polymer was obtained by thermogravimetric analysis.

[0050] Example 1

[0051] (1) 2.0 g of 2-amino-p-formyl-phenol, 4.0 g of Mg(NO 3 ) 2 6H 2O, 300 ml of N,N-dimethylformamide, ultrasonically dissolve, and heat at 120°C for 24 hours under nitrogen protection. Cool to room temperature, filter, wash with ethanol, and dry to obtain a white solid coordination polymer (2-amino-p-formyl-phenol-Mg). The thermal gravimetric decomposition temperature of the coordination polymer is 380°C.

[0052] The scanning electron microscope image of the coordination polymer prepared in Example 1 is as follows Figure 1 and Figure 2 As shown, it can be seen from the figure that the coordination polymer is in granular or powdery form.

[0053] (2-1) Nitrogen adsorption test: 100 mg of the coordination polymer was weighed and placed in a physical adsorption instrument, and then nitrogen was introduced into the physical adsorption instrument to perform a nitrogen adsorption test.

[0054] (2-2) Carbon dioxide gas adsorption test: 100 mg of the coordination polymer was weighed and placed in a physical adsorption instrument, and then carbon dioxide gas was introduced into the physical adsorption instrument to perform a carbon dioxide gas adsorption test.

[0055] The adsorption test of steps (2-1) and (2-2) basically reached adsorption equilibrium at 293K and 0.2MPa, at which the carbon dioxide adsorption capacity was 112cm 3 / g, nitrogen adsorption capacity is 5cm 3 / g.

[0056] Example 2

[0057] (1) 2.0 g of 2-methylamino-p-formyl-phenol, 3.5 g of Co(NO 3 ) 2 6H 2 O, 300 ml of dioxane, ultrasonically dissolve, heat at 95°C for 24 hours under nitrogen protection. Cool to room temperature, filter, wash with ethanol, and dry to obtain a dark purple solid coordination polymer (2-methylamino-p-formyl-phenol-Co). The thermal gravimetric decomposition temperature of the coordination polymer is 350°C.

[0058] (2-1) Nitrogen adsorption test: 100 mg of the coordination polymer was weighed and placed in a physical adsorption instrument, and then nitrogen was introduced into the physical adsorption instrument to perform a nitrogen adsorption test.

[0059] (2-2) Carbon dioxide gas adsorption test: 100 mg of the coordination polymer was weighed and placed in a physical adsorption instrument, and then carbon dioxide gas was introduced into the physical adsorption instrument to perform a carbon dioxide gas adsorption test.

[0060] The adsorption test of steps (2-1) and (2-2) basically reached adsorption equilibrium at 293K and 0.2MPa, at which the carbon dioxide adsorption capacity was 100cm 3 / g, nitrogen adsorption capacity is 6cm 3 / g.

[0061] The carbon dioxide adsorption curve of the coordination polymer prepared in Example 2 is as follows: Figure 3 As shown in the figure, it can be seen that the carbon dioxide adsorption capacity is 100cm 3 / g.

[0062] Example 3

[0063] (1) 2.0 g of 2-butylamino-p-formyl-phenol, 3.0 g of Cu(NO 3 ) 2 6H 2 O, 400 ml toluene, heated at 110°C for 24 hours under nitrogen protection, cooled to room temperature, filtered, washed with ethanol, and dried to obtain a blue solid coordination polymer (2-butylamino-p-formyl-phenol-Cu), with a thermogravimetric decomposition temperature of 430°C.

[0064] (2-1) Nitrogen adsorption test: 100 mg of the coordination polymer was weighed and placed in a physical adsorption instrument, and then nitrogen was introduced into the physical adsorption instrument to perform a nitrogen adsorption test.

[0065] (2-2) Carbon dioxide gas adsorption test: 100 mg of the coordination polymer was weighed and placed in a physical adsorption instrument, and then carbon dioxide gas was introduced into the physical adsorption instrument to perform a carbon dioxide gas adsorption test.

[0066] The adsorption test of steps (2-1) and (2-2) basically reached adsorption equilibrium at 293K and 0.15MPa, at which the carbon dioxide adsorption capacity was 120cm 3 / g, nitrogen adsorption capacity is 6.7cm 3 / g.

[0067] Example 4

[0068] (1) 2.0 g of 2-butylamino-p-formyl-phenol, 3.0 g of Cr(NO 3 ) 3 9H 2 O, 250 ml of N,N-dimethylformamide, heated at 110°C for 24 hours under nitrogen protection. Cooled to room temperature, filtered, washed with ethanol, and dried to obtain a brown solid coordination polymer (2-butylamino-p-formyl-phenol-Cr). The thermal gravimetric decomposition temperature of the coordination polymer is 450°C.

[0069] (2-1) Nitrogen adsorption test: 100 mg of the coordination polymer was weighed and placed in a physical adsorption instrument, and then nitrogen was introduced into the physical adsorption instrument to perform a nitrogen adsorption test.

[0070] (2-2) Carbon dioxide gas adsorption test: 100 mg of the coordination polymer was weighed and placed in a physical adsorption instrument, and then carbon dioxide gas was introduced into the physical adsorption instrument to perform a carbon dioxide gas adsorption test.

[0071] The adsorption test of steps (2-1) and (2-2) basically reached adsorption equilibrium at 293K and 0.2MPa, at which the carbon dioxide adsorption capacity was 112cm 3 / g, nitrogen adsorption capacity is 6.7cm 3 / g.

[0072] Example 5

[0073] (1) 4.0 g of 2-amino-p-formyl-phenol, 4.0 g of Ca(NO 3 ) 2 (Drying), 500 ml of DMSO, heated at 130°C for 24 hours under nitrogen protection. Cooled to room temperature, filtered, washed with ethanol, and dried to obtain a white solid coordination polymer (2-amino-p-formyl-phenol-Ca). The thermal gravimetric decomposition temperature of the coordination polymer is 440°C.

[0074] (2-1) Nitrogen adsorption test: 100 mg of the coordination polymer was weighed and placed in a physical adsorption instrument, and then nitrogen was introduced into the physical adsorption instrument to perform a nitrogen adsorption test.

[0075] (2-2) Carbon dioxide gas adsorption test: 100 mg of the coordination polymer was weighed and placed in a physical adsorption instrument, and then carbon dioxide gas was introduced into the physical adsorption instrument to perform a carbon dioxide gas adsorption test.

[0076] The adsorption test of steps (2-1) and (2-2) basically reached adsorption equilibrium at 293K and 0.13MPa, at which the carbon dioxide adsorption capacity was 111cm 3 / g, nitrogen adsorption capacity is 6.1cm 3 / g.

[0077] Comparative Example 1

[0078] Nitrogen adsorption test: Weigh 100 mg of industrial activated carbon and put it into a physical adsorption instrument, then introduce nitrogen into the physical adsorption instrument for a nitrogen adsorption test.

[0079] Carbon dioxide gas adsorption test: Weigh 100 mg of industrial activated carbon and put it into a physical adsorption instrument, then introduce carbon dioxide gas into the physical adsorption instrument to perform a carbon dioxide gas adsorption test.

[0080] The adsorption test basically reached adsorption equilibrium at 293K and 1MPa, at which the carbon dioxide adsorption capacity was 20.4cm 3 / g, nitrogen adsorption capacity is 21.3cm 3 / g.

[0081] Comparative Example 2

[0082] The adsorption test was carried out according to the method of Example 1, except that the coordination polymer was replaced by a structural formula of equal weight: MOF materials.

[0083] The adsorption test basically reached adsorption equilibrium at 293K and 1MPa, and the carbon dioxide adsorption capacity was 50.4cm 3 / g, nitrogen adsorption capacity is 36cm 3 / g.

[0084] Comparative Example 3

[0085] The adsorption test was carried out according to the method of Example 1, except that the coordination polymer was replaced by a structural formula of equal weight: MOF materials.

[0086] The adsorption test basically reached adsorption equilibrium at 293K and 1MPa, at which the carbon dioxide adsorption capacity was 70.4cm 3 / g, nitrogen adsorption capacity is 23cm 3 / g.

[0087] Comparative Example 4

[0088] The adsorption test was carried out according to the method of Example 1, except that the coordination polymer was replaced by a structural formula of equal weight: MOF materials.

[0089] The adsorption test basically reached adsorption equilibrium at 293K and 1MPa, at which the carbon dioxide adsorption capacity was 67cm 3 / g, nitrogen adsorption capacity is 74cm 3 / g.

[0090] Comparative Example 5

[0091] The adsorption test was carried out according to the method of Example 1, except that the coordination polymer was replaced by an equal weight of UiO-66-NH 2 , UiO-66-NH 2 The structural formula is

[0092] The adsorption test basically reached adsorption equilibrium at 293K and 1MPa, at which the carbon dioxide adsorption capacity was 13.5cm 3 / g, nitrogen adsorption capacity is 50cm 3 / g.

[0093] Comparative Example 6

[0094] The adsorption test was carried out according to the method of Example 1, except that the coordination polymer was replaced by an equal weight of UiO-66, the structural formula of which is

[0095] The adsorption test basically reached adsorption equilibrium at 293K and 1MPa, at which the carbon dioxide adsorption capacity was 19.4cm 3 / g, nitrogen adsorption capacity is 700cm 3 / g.

[0096] Compared with the comparative example, the coordination polymer of the embodiment of the present invention can reach adsorption equilibrium at a lower pressure, and the carbon dioxide adsorption amount is higher and the nitrogen adsorption amount is lower, which means that the coordination polymer of the present invention can achieve carbon dioxide capture at low pressure and has a high carbon dioxide capture capacity.

[0097] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A coordination polymer, characterized in that The coordination polymer has a structure shown in formula (1): Wherein, R is selected from -NH2, -alkyl-NH2, M1, M2 and M3 are each independently selected from at least one of Mg, Co, Cu, Cr, Ca, Zn, Fe and Al; Preferably, R is selected from -NH2, -C1-C 10 Alkyl-NH2, more preferably -NH2, -C1-C6 alkyl-NH2.

2. The coordination polymer according to claim 1, wherein The coordination polymer has a structure shown in formula (1-1): In formula (1-1), R, M1, M2 and M3 are as defined in claim 1 above.

3. A method for preparing a coordination polymer, characterized in that: The method comprises: in the presence of a solvent, causing a metal precursor to undergo a coordination reaction with a ligand, wherein the metal precursor is a precursor of at least one metal selected from the group consisting of Mg, Co, Cu, Cr, Ca, Zn, Fe and Al, and the ligand has a structure as shown in formula (2): Wherein, R is selected from -NH2, -alkyl-NH2, preferably, R is selected from -NH2, -C1-C 10 Alkyl-NH2, more preferably -NH2, -C1-C6 alkyl-NH2.

4. The method according to claim 3, wherein: The solvent is at least one of N,N-dimethylformamide, dioxane, toluene, dimethyl sulfoxide and tetrahydrofuran; And / or, the metal precursor is a metal salt, preferably a metal nitrate and / or a metal chloride, more preferably at least one of magnesium nitrate, cobalt nitrate, copper nitrate, chromium nitrate and calcium nitrate.

5. The method according to claim 3, wherein: The molar ratio of the metal precursor to the ligand is 1:0.1-10, preferably 1:0.3-3, calculated as the metal element; And / or, the amount of the solvent used is 80-500 mL per gram of the ligand.

6. The method according to claim 3, wherein: The conditions of the coordination reaction include: temperature of 50-200° C. and time of 0.5-72 h.

7. A coordination polymer prepared by the method according to any one of claims 3 to 6.

8. Use of the coordination polymer described in any one of claims 1, 2, and 7 and / or the coordination polymer prepared by the method described in any one of claims 3 to 6 in the adsorption of carbon dioxide.

9. A method for adsorbing carbon dioxide, characterized in that: The method comprises: contacting a gas containing carbon dioxide with the coordination polymer described in any one of claims 1, 2 and 7 to adsorb carbon dioxide.

10. The method according to claim 9, wherein: The adsorption conditions include: temperature of 273-323K and pressure of 0.1-1MPa.

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