An amorphous conjugated coordination polymer aerogel material, its preparation method and applications

Abstract

The present invention provides an amorphous conjugated coordination polymer aerogel material, a preparation method thereof and an application thereof. The method comprises the following steps: firstly, a metal salt solution and a conjugated organic ligand solution are mixed, and then the mixed solution is heated to promote coordination assembly and induced crosslinking to obtain a conjugated coordination polymer wet gel, and then the wet gel is dried to obtain a crystalline conjugated coordination polymer aerogel; the obtained crystalline conjugated coordination polymer aerogel is subjected to ultraviolet irradiation treatment, and finally an amorphous conjugated coordination polymer aerogel is obtained. The amorphous conjugated coordination polymer aerogel material prepared by the present invention has the advantages of flexible and adjustable molecular structure, containing unsaturated coordinated metal single-atom active sites, high electrochemical activity, etc. In addition, the preparation process is simple and easy to operate, the obtained amorphous conjugated coordination polymer aerogel material has good performance, and has a wide application prospect.

Description

Technical Field

[0001] The present invention belongs to the technical field of amorphous conjugated coordination polymer materials, and particularly relates to an amorphous conjugated coordination polymer aerogel material, a preparation method thereof and an application thereof. Background Art

[0002] Conjugated coordination polymers are a new type of single-atom catalytic material with excellent electronic conductivity and high stability. Such materials are formed through the effective hybridization of the π orbitals of conjugated organic ligands and the d electron orbitals of transition metals. Their strong conjugation effect and π-d electron coupling mechanism significantly promote the delocalization of charges, thereby greatly enhancing the electrical conductivity of the materials. However, the currently developed conjugated coordination polymer materials face the problems of too large particle size and easy aggregation, which seriously reduces the exposed number of active sites and limits the accessibility of active sites, thereby affecting the overall performance of the materials. By constructing a conjugated coordination polymer aerogel material with a nanoporous structure, its specific surface area and the diffusion rate of reactant molecules inside the material can be effectively increased, and the above problems are improved to a certain extent. However, the electrochemical activity of the saturated fully coordinated metal active sites in the currently developed conjugated coordination polymer aerogel materials is still relatively low, which limits the performance improvement in catalytic reactions.

[0003] Compared with traditional crystalline materials, amorphous materials have the characteristics of long-range disorder and contain vacancies / defects. These structural characteristics can effectively improve the adsorption / diffusion behavior of reactants, which is beneficial to improving the catalytic conversion efficiency of reactant molecules / ions. Therefore, it is of great significance to realize the preparation of amorphous conjugated coordination polymer aerogel materials, which can improve the problem of easy stacking and aggregation of the currently developed conjugated coordination polymer materials, and can also improve the problem of poor electrochemical activity of the currently developed conjugated coordination polymer aerogel materials, thereby realizing performance improvement and application expansion. Summary of the Invention

[0004] Object of the Invention: Aiming at the problems and deficiencies existing in the prior art, the present invention provides an amorphous conjugated coordination polymer aerogel material, a preparation method thereof and an application thereof. The prepared amorphous conjugated coordination polymer aerogel material contains unsaturated coordinated metal single-atom active sites, which helps to solve the problem of low catalytic activity of the existing crystalline conjugated coordination polymer aerogel materials. In addition, the amorphous conjugated coordination polymer aerogel material has the characteristic of long-range disorder, which can effectively improve the adsorption / diffusion behavior of reactants and is beneficial to improving the kinetics of catalytic conversion.

[0005] The first aspect of the present invention is to provide an amorphous conjugated coordination polymer aerogel material, which is constructed from metal single atoms and conjugated organic ligands; the metal single atoms include at least one of nickel, copper, zinc, aluminum, bismuth, and cobalt, and the conjugated organic ligands include at least one of 2,3,6,7,10,11 - hexahydroxytriphenylene, hexahydroxybenzene, 2,3,6,7,10,11 - hexaaminotriphenylene, and hexaaminobenzene; the amorphous conjugated coordination polymer aerogel material is an amorphous material containing unsaturated coordinated metal active sites.

[0006] The second aspect of the present invention is to provide a preparation method of an amorphous conjugated coordination polymer aerogel material, and the method includes the following steps:

[0007] (1) Mix the metal salt solution and the conjugated organic ligand solution, and then heat - treat the mixture to promote coordination assembly and induced cross - linking to prepare a conjugated coordination polymer wet gel, and then obtain a crystalline conjugated coordination polymer aerogel material through drying treatment;

[0008] (2) Perform ultraviolet irradiation treatment on the obtained crystalline conjugated coordination polymer aerogel material to prepare an amorphous conjugated coordination polymer aerogel material.

[0009] In one embodiment, the molar ratio of the metal salt to the conjugated organic ligand in step (1) is 1 - 2:1, preferably 1.5:1.

[0010] In one embodiment, the conjugated organic ligand in step (1) is one of 2,3,6,7,10,11 - hexahydroxytriphenylene, hexahydroxybenzene, 2,3,6,7,10,11 - hexaaminotriphenylene, and hexaaminobenzene, preferably 2,3,6,7,10,11 - hexahydroxytriphenylene.

[0011] In one embodiment, the solvent in step (1) is one of water, dimethyl sulfoxide, acetone, and N,N - dimethylformamide, preferably dimethyl sulfoxide.

[0012] In one embodiment, the metal salt in step (1) is one of acetate, chloride, sulfate, and nitrate, preferably acetate.

[0013] In one embodiment, the heating treatment temperature in step (1) is 65 - 80 °C, preferably 75 °C.

[0014] In one embodiment, the concentration of the conjugated organic ligand solution in step (1) is 0.4 - 0.6 mol·L -1 , preferably 0.5 mol·L -1 .

[0015] In one embodiment, the concentration of the metal salt solution in step (1) is 0.3 - 1.2 mol·L -1 .

[0016] Furthermore, in one embodiment, the concentration of the metal salt solution in step (1) is 0.5 - 1.0 mol·L -1 , more preferably 0.75 mol·L -1 .

[0017] In one embodiment, the heat treatment time in step (1) is 24 - 48 h, preferably 24 h.

[0018] In one embodiment, the drying treatment in step (1) includes at least one of atmospheric drying, freeze drying, and supercritical drying, preferably supercritical drying; the treatment time is 8 - 12 h, preferably 12 h.

[0019] In one embodiment, the ultraviolet irradiation treatment time in step (2) is 1 - 6 h, preferably 3 h.

[0020] In one embodiment, the wavelength range of the ultraviolet light for the ultraviolet irradiation treatment in step (2) is 10 nm - 380 nm.

[0021] Furthermore, in one embodiment, the wavelength of the ultraviolet light for the ultraviolet irradiation treatment in step (2) is 365 nm.

[0022] On the other hand, the present invention provides an amorphous conjugated coordination polymer aerogel material prepared by the above method.

[0023] The invention principle of the present invention is: the conjugated organic ligand and the metal ion undergo coordination assembly and induced crosslinking to form a crystalline conjugated coordination polymer aerogel; subsequent ultraviolet irradiation treatment causes some coordination bonds in the crystalline conjugated coordination polymer aerogel to break, thereby generating unsaturated coordinated metal active sites, and also causing the material to be amorphous, obtaining an amorphous conjugated coordination polymer aerogel material. The ultraviolet irradiation treatment does not destroy the nano-porous structure characteristics of the amorphous conjugated coordination polymer aerogel material.

[0024] On the other hand, the present invention also provides an application of the above preparation method or an application of an amorphous conjugated coordination polymer aerogel material, including applications in the fields of catalysis, electrochemical energy storage, electromagnetic wave shielding and absorption, sensing, and electronic devices, etc.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. The amorphous conjugated coordination polymer aerogel material prepared by the present invention has the advantages of flexible and adjustable molecular structure, containing unsaturated coordinated metal single-atom active sites, and high electrochemical activity.

[0027] 2. The amorphous conjugated coordination polymer aerogel material prepared by the present invention has the characteristic of long-range disorder, which can effectively improve the adsorption / diffusion of reactants and enhance the catalytic reaction kinetics. Description of the Drawings

[0028] Figure 1 Comparison of the structural schematic diagrams of the amorphous conjugated coordination polymer aerogel material in Example 1 and the crystalline conjugated coordination polymer aerogel material in Comparative Example 1.

[0029] Figure 2 Scanning electron microscope photos of the amorphous conjugated coordination polymer aerogel material in Example 1 and the crystalline conjugated coordination polymer aerogel material in Comparative Example 1.

[0030] Figure 3 Transmission electron microscope photos of the amorphous conjugated coordination polymer aerogel material in Example 1 and the crystalline conjugated coordination polymer aerogel material in Comparative Example 1; the upper left inset is the crystal diffraction photo of the amorphous conjugated coordination polymer aerogel material and the crystalline conjugated coordination polymer aerogel material in Comparative Example 1.

[0031] Figure 4 X-ray diffraction patterns of the amorphous conjugated coordination polymer aerogel material in Example 1 and the crystalline conjugated coordination polymer aerogel material in Comparative Example 1.

[0032] Figure 5 Electron paramagnetic resonance spectra of the amorphous conjugated coordination polymer aerogel material in Example 1 and the crystalline conjugated coordination polymer aerogel material in Comparative Example 1.

[0033] Figure 6 Test results of linear sweep voltammetry curves of the amorphous conjugated coordination polymer aerogel material in Example 1, the crystalline conjugated coordination polymer aerogel material in Comparative Example 1, and the amorphous conjugated coordination polymer material in Comparative Example 2.

[0034] Figure 7 Test results of in-situ electrochemical impedance spectroscopy of the amorphous conjugated coordination polymer aerogel material in Example 1 and the crystalline conjugated coordination polymer aerogel material in Comparative Example 1. Detailed Embodiments

[0035] The present invention provides an amorphous conjugated coordination polymer aerogel material, a preparation method thereof and an application. First, a metal salt solution and a conjugated organic ligand solution are mixed, and the mixed solution is heated to promote coordination assembly and induced cross-linking. Subsequently, a crystalline conjugated coordination polymer aerogel material is obtained through drying, and finally, an amorphous conjugated coordination polymer aerogel material is obtained through ultraviolet irradiation treatment. The amorphous conjugated coordination polymer aerogel material prepared by the present invention has the advantages of flexible and adjustable molecular structure, containing unsaturated coordinated single-atom active sites, and high electrochemical activity. The preparation process is simple and easy to operate, and the obtained amorphous conjugated coordination polymer aerogel material has excellent performance and good application prospects.

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Except for special regulations otherwise, the reagents used in the embodiments of the present invention can all be purchased through commercial channels.

[0038] The present invention provides the attached drawings of the characterization test results of Example 1. The same characterization test method is used for other embodiments. Those skilled in the art can directly and unambiguously determine the content of the embodiments of the present invention through the characterization test method provided by the present invention.

[0039] Example 1: Preparation of an amorphous conjugated coordination polymer aerogel material

[0040] (1) Use a balance to weigh 187 mg (0.75 mmol) of nickel acetate tetrahydrate and dissolve it in 1.0 mL of deionized water. Weigh 162 mg (0.50 mmol) of 2,3,6,7,10,11-hexahydroxytriphenylene and dissolve it in 1.0 mL of dimethyl sulfoxide. Ultrasonically disperse for 1 h. After fully dissolving, mix them in a glass bottle and place it in a 75 °C forced-air oven and keep warm for 24 h to obtain a conjugated coordination polymer wet gel. Subsequently, a crystalline conjugated coordination polymer aerogel material is obtained through supercritical drying treatment.

[0041] (2) Perform ultraviolet irradiation treatment on the obtained crystalline conjugated coordination polymer aerogel material at a wavelength of 365 nm for 3 h to obtain an amorphous conjugated coordination polymer aerogel material.

[0042] Example 2: Preparation of an amorphous conjugated coordination polymer aerogel material

[0043] (1) Weigh 322 mg (1.3 mmol) of nickel acetate tetrahydrate using an analytical balance and dissolve it in 1.2 mL of deionized water. Weigh 150 mg (0.86 mmol) of hexahydroxybenzene and dissolve it in 1.2 mL of dimethyl sulfoxide. Ultrasonically disperse for 1 h. After complete dissolution, mix them in a glass bottle and place it in a forced-air oven at 75 °C for 24 h to obtain a conjugate coordination polymer wet gel. Subsequently, obtain a crystalline conjugate coordination polymer aerogel material through supercritical drying treatment.

[0044] (2) Perform ultraviolet irradiation on the obtained crystalline conjugate coordination polymer aerogel material at a wavelength of 365 nm for 3 h to obtain an amorphous conjugate coordination polymer aerogel material.

[0045] Comparative Example 1: Preparation of Crystalline Conjugate Coordination Polymer Aerogel Material

[0046] The difference between this comparative example and Example 1 is that only the crystalline conjugate coordination polymer aerogel material is prepared without ultraviolet irradiation treatment, including the following steps:

[0047] (1) Weigh 187 mg (0.75 mmol) of nickel acetate tetrahydrate using an analytical balance and dissolve it in 1.0 mL of deionized water. Weigh 162 mg (0.50 mmol) of 2,3,6,7,10,11 - hexahydroxytriphenylene and dissolve it in 1.0 mL of dimethyl sulfoxide. Ultrasonically disperse for 1 h. After complete dissolution, mix them in a glass bottle and place it in a forced-air oven at 75 °C for 24 h to obtain a conjugate coordination polymer wet gel. Subsequently, obtain a crystalline conjugate coordination polymer aerogel material through supercritical drying treatment.

[0048] Comparative Example 2: Preparation of Amorphous Conjugate Coordination Polymer Material

[0049] The difference between this comparative example and Example 1 is that only the amorphous conjugate coordination polymer material is prepared, including the following steps:

[0050] (1) Weigh 39.8 mg (0.16 mmol) of nickel acetate tetrahydrate using an analytical balance and dissolve it in 2.0 mL of deionized water. Weigh 26 mg (0.08 mmol) of 2,3,6,7,10,11 - hexahydroxytriphenylene and dissolve it in 2.0 mL of dimethyl sulfoxide. Ultrasonically disperse for 1 h. After complete dissolution, mix them in a glass bottle and place it in a forced-air oven at 75 °C for 24 h to obtain a precipitate. Subsequently, obtain an amorphous conjugate coordination polymer material through atmospheric pressure drying treatment.

[0051] (2) Perform ultraviolet irradiation on the obtained crystalline conjugate coordination polymer material at a wavelength of 365 nm for 3 h to obtain an amorphous conjugate coordination polymer material, and no gel is formed.

[0052] Test Example: Performance Test of Amorphous Conjugate Coordination Polymer Aerogel Material

[0053] AsFigure 1 Figure 1 shows a comparison of the structural schematic diagrams of the amorphous conjugated coordination polymer aerogel material of Example 1 and the crystalline conjugated coordination polymer aerogel material of Comparative Example 1. Ultraviolet irradiation treatment can break some of the coordination bonds in the crystalline conjugated coordination polymer aerogel, thereby generating unsaturated coordinated metal active sites, which also causes the material to be amorphized, resulting in an amorphous conjugated coordination polymer aerogel material.

[0054] As shown in Table 1, the inductively coupled plasma emission spectrometry test results of the nickel-based amorphous conjugated coordination polymer aerogel material are presented. In the amorphous conjugated coordination polymer aerogel material obtained in Example 1, the content of metal Ni is higher than 15 wt.%.

[0055] Table 1. Inductively coupled plasma emission spectrometry test results of the nickel-based amorphous conjugated coordination polymer aerogel material

[0056]

[0057] As Figure 2 Figures a and b show the scanning electron microscope photos of the amorphous conjugated coordination polymer aerogel material of Example 1 and the crystalline conjugated coordination polymer aerogel material of Comparative Example 1. It can be observed that both the amorphous conjugated coordination polymer aerogel material of Example 1 and the crystalline conjugated coordination polymer aerogel material of Comparative Example 1 have an obvious porous morphology of the aerogel, fully indicating that the ultraviolet irradiation treatment has no effect on the morphology of the aerogel material.

[0058] As Figure 3 Figures a and b show the transmission electron microscope photos of the amorphous conjugated coordination polymer aerogel material of Example 1 and the crystalline conjugated coordination polymer aerogel material of Comparative Example 1. It can be observed that Figure 3 in Figure a, the amorphous conjugated coordination polymer aerogel material of Example 1 has no lattice fringes, while Figure 3 in Figure b, the crystalline conjugated coordination polymer aerogel material of Comparative Example 1 has obvious lattice fringes of 1.8 nm, fully confirming the crystallization situation of Comparative Example 1. In addition, the crystal diffraction photo in the upper left corner shows that the amorphous conjugated coordination polymer aerogel material of Example 1 has no crystal diffraction ring, while the crystalline conjugated coordination polymer aerogel material of Comparative Example 1 has an obvious crystal diffraction ring.

[0059] As Figure 4Shown are the X-ray diffraction patterns of the amorphous conjugated coordination polymer aerogel material of Example 1 and the crystalline conjugated coordination polymer aerogel material of Comparative Example 1. The XRD pattern of the crystalline conjugated coordination polymer aerogel material of Comparative Example 1 shows peaks at 2θ = 4.7°, 9.3°, 14.1°, 16.3° and 27.1°, which can correspond to the (010), (020), (030), (220) and (002) crystal planes respectively. However, the amorphous conjugated coordination polymer aerogel material of Example 1 has no characteristic peaks at these crystal planes, which also confirms Figure 3 the results of transmission electron microscopy and crystal diffraction.

[0060] As Figure 5 shown are the electron paramagnetic resonance spectra of the amorphous conjugated coordination polymer aerogel material of Example 1 and the crystalline conjugated coordination polymer aerogel material of Comparative Example 1. It can be clearly seen from Figure 5 that the amorphous conjugated coordination polymer aerogel material of Example 1 has more unpaired electrons compared to the crystalline conjugated coordination polymer aerogel material of Comparative Example 1, confirming that it contains unsaturated coordinated metal single-atom active sites.

[0061] As Figure 6 shown are the linear sweep voltammograms of the amorphous conjugated coordination polymer aerogel material of Example 1, the crystalline conjugated coordination polymer aerogel material of Comparative Example 1 and the amorphous conjugated coordination polymer material of Comparative Example 2 in a CO2-saturated 0.5 M KHCO3 aqueous solution (neutral electrolyte system). The results show that: the overpotential of the amorphous conjugated coordination polymer aerogel material of Example 1 at 10 mA cm -2 is 230 mV, the overpotential of the crystalline conjugated coordination polymer aerogel material of Comparative Example 1 at 10 mA cm -2 is 543 mV, and the overpotential of the amorphous conjugated coordination polymer material of Comparative Example 2 at 10 mA cm -2 is 665 mV. The above results show that: the electrocatalytic oxygen evolution performance of the amorphous conjugated coordination polymer aerogel material of Example 1 in the neutral electrolyte system is superior to that of the crystalline conjugated coordination polymer aerogel material of Comparative Example 1 and the amorphous conjugated coordination polymer material of Comparative Example 2. The excellent performance of the amorphous conjugated coordination polymer aerogel material prepared in the present invention is attributed to its combination of amorphous characteristics and aerogel porous structure characteristics.

[0062] As Figure 7 shown are the in-situ electrochemical impedance spectroscopy test results of the amorphous conjugated coordination polymer aerogel material of Example 1 and the crystalline conjugated coordination polymer aerogel material of Comparative Example 1 in a CO2-saturated 0.5 M KHCO3 aqueous solution. It can be seen from Figure 7 a that the amorphous conjugated coordination polymer aerogel material of Example 1 is smaller compared to the crystalline conjugated coordination polymer aerogel material of Comparative Example 1. Figure 7The adsorbed capacitance values shown in b also indicate that the reactants adsorbed on the surface of the amorphous conjugated coordination polymer aerogel material in Example 1 are more than those adsorbed on the surface of the crystalline conjugated coordination polymer aerogel material in Comparative Example 1. The above results all confirm that the amorphous conjugated coordination polymer aerogel material can effectively improve the adsorption / diffusion of reactants, thereby achieving an improvement in catalytic reaction kinetics. This is consistent with Figure 6 the comparison results of the catalytic performance of the amorphous conjugated coordination polymer aerogel material in Example 1 and the crystalline conjugated coordination polymer aerogel material in Comparative Example 1 shown.

[0063] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An amorphous conjugated coordination polymer aerogel material, characterized in that: The amorphous conjugated coordination polymer aerogel material is constructed by metal single atoms and conjugated organic ligands; the metal single atoms include at least one of nickel, copper, zinc, aluminum, bismuth, and cobalt, and the conjugated organic ligands include at least one of 2,3,6,7,10,11-hexahydroxytriphenyl, hexahydroxybenzene, 2,3,6,7,10,11-hexaaminotriphenyl, and hexaaminobenzene; The amorphous conjugated coordination polymer aerogel material is an amorphous material containing unsaturated coordinated metal active sites; The preparation method of the amorphous conjugated coordination polymer aerogel material comprises the following steps: (1) mixing a metal salt solution with a conjugated organic ligand solution, and then heating the mixed solution to promote coordination assembly and induce cross-linking to prepare a conjugated coordination polymer wet gel, and then drying to obtain a crystalline conjugated coordination polymer aerogel material; (2) The obtained crystalline conjugated coordination polymer aerogel material is subjected to ultraviolet irradiation treatment to obtain an amorphous conjugated coordination polymer aerogel material.

2. The amorphous conjugated coordination polymer aerogel material according to claim 1, characterized in that: The amorphous conjugated coordination polymer aerogel material has a high conductivity at 10 mA cm -2 The overpotential at the current density is less than 300 mV.

3. The amorphous conjugated coordination polymer aerogel material according to claim 2, characterized in that: The amorphous conjugated coordination polymer aerogel material has a high conductivity at 10 mA cm -2 The overpotential at the current density is less than 250 mV.

4. The amorphous conjugated coordination polymer aerogel material according to claim 3, characterized in that: The amorphous conjugated coordination polymer aerogel material has a high conductivity at 10 mA cm -2 The overpotential at the current density is 200-250 mV.

5. A method for preparing an amorphous conjugated coordination polymer aerogel material, characterized in that: The following steps are involved: (1) mixing a metal salt solution with a conjugated organic ligand solution, and then heating the mixed solution to promote coordination assembly and induce cross-linking to prepare a conjugated coordination polymer wet gel, and then drying to obtain a crystalline conjugated coordination polymer aerogel material; (2) The obtained crystalline conjugated coordination polymer aerogel material is subjected to ultraviolet irradiation treatment to obtain an amorphous conjugated coordination polymer aerogel material.

6. The method according to claim 5, characterized in that The metal type of the metal salt in step (1) includes at least one of nickel, copper, zinc, aluminum, bismuth and cobalt.

7. The method according to claim 5, characterized in that The metal salt in step (1) includes at least one of acetate, chloride, sulfate and nitrate.

8. The method according to claim 5, characterized in that The conjugated organic ligand in step (1) is at least one of 2,3,6,7,10,11-hexahydroxytriphenyl, hexahydroxybenzene, 2,3,6,7,10,11-hexaaminotriphenyl, and hexaaminobenzene.

9. The method according to claim 5, characterized in that The solvents of the metal salt solution and the conjugated organic ligand solution in step (1) are independently at least one of water, dimethyl sulfoxide, acetone, and N,N-dimethylformamide.

10. The method according to claim 5, characterized in that In the step (1), the molar ratio of the metal salt to the conjugated organic ligand is 1-2:

1.

11. The method according to claim 10, characterized in that The molar ratio of the metal salt to the conjugated organic ligand in step (1) is 1.5:

1.

12. The method according to claim 5, 10 or 11, characterized in that: The concentration of the metal salt solution in step (1) is 0.3-1.2 mol·L -1 .

13. The method according to claim 12, characterized in that The concentration of the metal salt solution in step (1) is 0.5-1.0 mol·L -1 .

14. The method according to claim 13, characterized in that The concentration of the metal salt solution in step (1) is 0.75 mol·L -1 .

15. The method according to claim 5, characterized in that The concentration of the conjugated organic ligand solution in step (1) is 0.2-0.8 mol·L -1 .

16. The method according to claim 15, characterized in that The concentration of the conjugated organic ligand solution is 0.4-0.6 mol·L -1 .

17. The method according to claim 16, characterized in that The concentration of the conjugated organic ligand solution is 0.5 mol·L -1 .

18. The method according to claim 5, characterized in that In the step (1), the heating treatment temperature is 65-80° C. and the reaction time is 24-48 h.

19. The method according to claim 5, characterized in that The drying process in step (1) includes at least one of atmospheric pressure drying, freeze drying, and supercritical drying.

20. The method according to claim 5, characterized in that In step (2), the ultraviolet irradiation treatment is performed for 1 to 6 hours, and the wavelength range of the ultraviolet light is 10 nm to 380 nm.

21. Use of the amorphous conjugated coordination polymer aerogel material as claimed in any one of claims 1 to 4 or prepared by the method as claimed in any one of claims 5 to 20, including application in the fields of catalysis, adsorption, sensing, electrochemical energy storage, electromagnetic shielding or wave absorption.

22. The use according to claim 21, characterized in that The catalysis is specifically applied to the electrocatalytic oxygen evolution reaction in a neutral electrolyte system.

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