Self-repairing polymer photothermal material based on znmo multi-cluster and preparation method thereof

Abstract

The application discloses a preparation method of a self-repairing polymer photothermal material based on ZnMo multi-cluster, under the condition of a hydrothermal method, introducing zinc citrate dihydrate, molybdic acid and 2-mercapto-5-methoxy benzimidazole ligand as one of raw materials, preparing a ZnMo multi-cluster photothermal material precursor by modification, then through washing, high-temperature annealing reaction, cooling to room temperature, obtaining the ZnMo multi-cluster photothermal material powder, blending the powder with a polymer, and preparing the self-repairing photothermal water evaporation material. The ZnMo multi-cluster photothermal material precursor is obtained through the hydrothermal method, and is blended with the polymer to form a special structure network, and then the high-performance, high-stability and self-healing photothermal material is obtained. The photothermal efficiency under the sun reaches 102 DEG C, and the self-healing can be realized in 10 minutes. It is an effective method for preparing the photothermal material, which is simple and convenient in operation, green and safe, good in repeatability and high in efficiency.

Description

Technical Field

[0001] This invention belongs to the field of nanophotothermal materials technology, specifically relating to a method for preparing self-healing polymer photothermal materials based on ZnMo multi-clusters, and also relating to self-healing polymer photothermal materials based on ZnMo multi-clusters. Background Technology

[0002] With the rapid development of science and technology, traditional seawater desalination technologies suffer from drawbacks such as high desalination costs, huge energy consumption, and ineffective control of carbon emissions. Solar-powered interfacial water evaporation systems, as a new generation of seawater desalination technology, offer advantages such as environmental friendliness, high energy efficiency, and strong adaptability, reducing dependence on fossil fuels. This is of great significance for alleviating the energy crisis, reducing water pollution, and promoting seawater desalination. Metal-organic frameworks (MOFs), due to their high photothermal conversion efficiency, near-infrared absorption characteristics, porosity, large specific surface area, and simple and low-cost preparation, have become excellent materials for future photothermal evaporation.

[0003] Metal-organic frameworks (MOFs) with bimetallic sites are a special class of MOF materials containing active sites of two different metal elements. These sites are typically bridged by organic ligands or exist adjacent to each other within the MOF structure. The design and synthesis of these materials aim to combine and optimize the catalytic performance of the two metals, enhancing catalytic activity, selectivity, and stability through intermetallic synergistic effects. Their unique structure and tunability result in significantly improved catalytic and light absorption properties.

[0004] The high production cost of current photothermal materials limits their large-scale commercial application. Furthermore, these materials typically have a short lifespan and are prone to physical or chemical degradation under prolonged exposure to light, temperature changes, and other environmental factors, thus reducing photothermal conversion efficiency. Frequent replacement of these materials not only increases the economic burden but also generates a large amount of waste, negatively impacting the environment. Lacking a simple and green approach, this experiment addresses these shortcomings by employing an environmentally friendly, simple, and controllable hydrothermal method to prepare a high-performance, self-healing polymer photothermal material. Summary of the Invention

[0005] The purpose of this invention is to provide a method for preparing self-healing polymer photothermal materials based on ZnMo multi-clusters, which solves the problem of low photothermal conversion efficiency of existing photothermal materials.

[0006] Another objective of this invention is to provide a self-healing polymer photothermal material based on ZnMo multi-clusters.

[0007] The technical solution adopted in this invention is a method for preparing self-healing polymer photothermal materials based on ZnMo multi-clusters, and the specific operation steps are as follows:

[0008] Step 1, Hydrothermal preparation of ZnMo multi-cluster photothermal material precursor: Dissolve a mixture of zinc citrate dihydrate, molybdic acid, and 2-mercapto-5-methoxybenzimidazole in N,N-dimethylformamide. Seal the mixed solution in a 25mL polytetrafluoroethylene-lined reactor, place a magnetic stirrer, and stir magnetically until the mixture is homogeneous.

[0009] Step 2: The reactor is placed in an autoclave and dried in a high-temperature oven. After the reactor is cooled to room temperature, it is washed with N,N-dimethylformamide to remove impurities, and then dried to obtain blue-black crystals, thus obtaining product A.

[0010] Step 3: Place product A in an oven to dry and grind it in a mortar to obtain ZnMo multi-cluster photothermal material, i.e. powder B;

[0011] Step 4, preparation of polymer by high temperature stirring method: Hexamethylene diisocyanate, polytetrahydrofuran, and N,N-dimethylformamide are dissolved in a round-bottom flask, and 3 drops of dibutyltin dilaurate are added. The flask is then placed on an oil bath magnetic stirrer and reacted in an oil bath at 70°C for 4-5 hours. After 4-5 hours, urea (dissolved in a small amount of N,N-dimethylformamide) is added and the reaction continues for another 4-5 hours to obtain the polymer, namely polymer C.

[0012] Step 5: Powder B and polymer C are blended at a ratio of 1:10 and assembled into a photothermal evaporator for seawater desalination in actual water bodies.

[0013] The invention is further characterized in that,

[0014] In step 1, the molar ratio of zinc citrate dihydrate, molybdic acid, and 2-mercapto-5-methoxybenzimidazole is 0.27:2.1:3.0.

[0015] In step 2, the temperature of the high-temperature oven should be 140–160°C, and the time should be 72–96 hours.

[0016] In step 2, the drying temperature should be 60-80℃ and the drying time should be 12-24 hours.

[0017] In step 3, the powder should be ground in the mortar for 10 to 20 minutes.

[0018] In step 4, the oil bath heating time is 8 to 10 hours.

[0019] Step 5 prepares a self-healing polymer photothermal material of ZnMo multi-clusters for seawater desalination in actual water bodies.

[0020] The second technical solution adopted in this invention is: a self-healing polymer photothermal material based on ZnMo multi-clusters, which is prepared using the preparation method of self-healing polymer photothermal material based on ZnMo multi-clusters.

[0021] This invention employs a simple and green chemical hydrothermal method to prepare ZnMo multi-clusters, which are then blended with polymers to form a unique polymer network. The resulting sample exhibits high specific surface area, low density, ultralight weight, low cost, and high performance. The multiple metal sites provide abundant pathways for sunlight absorption, and the unique network formed with the polymer enhances its self-healing and light absorption capabilities, resulting in an ideal photothermal conversion material.

[0022] The beneficial effects of this invention are:

[0023] (1) The present invention adopts an environmentally friendly, simple and controllable chemical preparation process to synthesize ZnMo multi-cluster photothermal material by hydrothermal method. The ZnMo multi-cluster photothermal material is mixed with polymer to obtain a photothermal material with high photothermal intensity and self-healing ability.

[0024] (2) The ZnMo multi-cluster polymer photothermal material prepared in this invention exhibits excellent photothermal conversion performance under xenon lamp irradiation. When the xenon lamp is adjusted to the intensity of sunlight and irradiated for 1 hour, the photothermal powder material reaches a maximum temperature of 85°C, and the self-healing polymer photothermal material of ZnMo multi-cluster reaches 102°C, indicating that the samples have excellent photothermal conversion capabilities.

[0025] (3) The self-healing polymer photothermal material prepared was used for seawater desalination in actual water bodies.

[0026] (4) The present invention can make the synthesis method simpler by changing the experimental conditions, such as temperature and reaction time. Attached Figure Description

[0027] Figure 1 This is a flowchart of the preparation method of the ZnMo multi-cluster self-healing polymer photothermal material of the present invention.

[0028] Figure 2 This is the XRD diffraction pattern of the ZnMo multi-cluster photothermal material precursor (powder B) in this invention.

[0029] Figure 3 This is a 10-minute surface infrared image of the ZnMo multi-cluster photothermal material precursor (powder B) in this invention.

[0030] Figure 4 This is a temperature curve image of the ZnMo multi-cluster photothermal material precursor (powder B) in this invention after being irradiated under a solar intensity for 10 minutes.

[0031] Figure 5These are cyclic images of the ZnMo multi-cluster photothermal material precursor (powder B) in this invention being irradiated 10 times under one solar intensity.

[0032] Figure 6 This is a temperature curve image of the ZnMo multi-cluster self-healing polymer photothermal material of the present invention after 10 minutes of irradiation under one solar intensity.

[0033] Figure 7 This is an image of the self-healing ZnMo multi-cluster self-healing polymer photothermal material of this invention under a microscope. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] This invention relates to a method for preparing self-healing polymer photothermal materials based on ZnMo multi-clusters. The aim is to synthesize ZnMo multi-clusters with bimetallic sites via a hydrothermal method to obtain ZnMo multi-cluster photothermal material precursors. This method utilizes a chemical hydrothermal approach to improve the reaction rate during MOF (Multi-Metal Facility) preparation, while simultaneously preparing polymers. Through blending, the chemical bonds between the MOFs and the polymer form a unique network, effectively improving the light absorption rate and self-healing properties of the target material. Finally, a thermosetting method is used to obtain the ZnMo multi-cluster polymer photothermal material.

[0036] Example 1

[0037] The preparation method of the ZnMo multi-cluster self-healing polymer photothermal material of the present invention is as follows: Figure 1 As shown, the specific operation steps are as follows:

[0038] Step 1, Hydrothermal preparation of ZnMo multi-cluster photothermal material precursor: Dissolve a mixture of zinc citrate dihydrate, molybdic acid, and 2-mercapto-5-methoxybenzimidazole in N,N-dimethylformamide. Seal the mixed solution in a 25mL polytetrafluoroethylene-lined reactor, place a magnetic stirrer, and stir magnetically until the mixture is homogeneous.

[0039] Step 2: The reactor was placed in an autoclave and stored in a high-temperature oven at 160°C for 3 days. After the reactor cooled to room temperature, it was washed with N,N-dimethylformamide to remove impurities, and then dried at 80°C for 12 hours. Blue-black crystals were obtained, yielding product A.

[0040] Step 3: Place product A in an oven at 70°C for 12 hours to dry, and grind it in a mortar to obtain ZnMo multi-cluster photothermal material, i.e. powder B;

[0041] Step 4, preparation of polymer by high temperature stirring method: Hexamethylene diisocyanate, polytetrahydrofuran, and 30 mL of N,N-dimethylformamide are dissolved in a 100 mL round-bottom flask, and then 3 drops of dibutyltin dilaurate are added. The flask is set up on an oil bath magnetic stirrer and reacted in an oil bath at 70 °C for 4 h. After 4 h, urea (dissolved in a small amount of N,N-dimethylformamide) is added and the reaction is continued for another 4 h to obtain the polymer, namely polymer C.

[0042] Step 5: Powder B and polymer C are blended at a ratio of 1:10 and assembled into a self-healing photothermal evaporator for seawater desalination in actual water bodies.

[0043] Example 2

[0044] The preparation method of the ZnMo multi-cluster self-healing polymer photothermal material of the present invention is as follows: Figure 1 As shown, the specific operation steps are as follows:

[0045] Step 1, Hydrothermal preparation of ZnMo multi-cluster photothermal material precursor: Dissolve a mixture of zinc citrate dihydrate, molybdic acid, and 2-mercapto-5-methoxybenzimidazole in N,N-dimethylformamide. Seal the mixed solution in a 25mL polytetrafluoroethylene-lined reactor, place a magnetic stirrer, and stir magnetically until the mixture is homogeneous.

[0046] Step 2: The reactor was placed in an autoclave and stored in a high-temperature oven at 150°C for 3 days. After the reactor cooled to room temperature, it was washed with N,N-dimethylformamide to remove impurities, and then dried at 70°C for 12 hours. Blue-black crystals were obtained, yielding product A.

[0047] Step 3: Place product A in an oven at 70°C for 18 hours to dry, and grind it in a mortar to obtain ZnMo multi-cluster photothermal material, i.e. powder B;

[0048] Step 4, preparation of polymer by high temperature stirring method: Hexamethylene diisocyanate, polytetrahydrofuran, and 30 mL of N,N-dimethylformamide were dissolved in a 150 mL round-bottom flask, and 3 drops of dibutyltin dilaurate were added. The flask was set up on an oil bath magnetic stirrer and reacted in an oil bath at 70 °C for 4 h. After 4 h, urea (dissolved in a small amount of N,N-dimethylformamide) was added and the reaction was continued for another 4 h to obtain the polymer, namely polymer C.

[0049] Step 5: Powder B and polymer C are blended at a ratio of 1:10 and assembled into a self-healing photothermal evaporator for seawater desalination in actual water bodies.

[0050] Example 3

[0051] The preparation method of the ZnMo multi-cluster self-healing polymer photothermal material of the present invention is as follows: Figure 1As shown, the specific operation steps are as follows:

[0052] Step 1, Hydrothermal preparation of ZnMo multi-cluster photothermal material precursor: Dissolve a mixture of zinc citrate dihydrate, molybdic acid, and 2-mercapto-5-methoxybenzimidazole in N,N-dimethylformamide. Seal the mixed solution in a 25mL polytetrafluoroethylene-lined reactor, place a magnetic stirrer, and stir magnetically until the mixture is homogeneous.

[0053] Step 2: The reactor was placed in an autoclave and stored in a high-temperature oven at 160°C for 3 days. After cooling to room temperature, the reactor was washed with N,N-dimethylformamide until most of the brown and dark green deposits disappeared, and then dried at 60°C for 12 hours. Blue-black crystals were obtained, yielding product A.

[0054] Step 3: Place product A in an oven at 60°C for 12 hours to dry, and grind it in a mortar to obtain ZnMo multi-cluster photothermal material, i.e. powder B.

[0055] Step 4, preparation of polymer by high temperature stirring method: Hexamethylene diisocyanate, polytetrahydrofuran, and 30 mL of N,N-dimethylformamide are dissolved in a 100 mL round-bottom flask, and then 3 drops of dibutyltin dilaurate are added. The flask is set up on an oil bath magnetic stirrer and reacted in an oil bath at 70 °C for 5 h. After 5 h, urea (dissolved in a small amount of N,N-dimethylformamide) is added and the reaction is continued for another 5 h to obtain the polymer, namely polymer C.

[0056] Step 5: Powder B and polymer C are blended at a ratio of 1:10 and assembled into a self-healing photothermal evaporator for seawater desalination in actual water bodies.

[0057] Example 4

[0058] The preparation method of the ZnMo multi-cluster self-healing polymer photothermal material of the present invention is as follows: Figure 1 As shown, the specific operation steps are as follows:

[0059] Step 1, Hydrothermal preparation of ZnMo multi-cluster photothermal material precursor: Dissolve a mixture of zinc citrate dihydrate, molybdic acid, and 2-mercapto-5-methoxybenzimidazole in N,N-dimethylformamide. Seal the mixed solution in a 25mL polytetrafluoroethylene-lined reactor, place a magnetic stirrer, and stir magnetically until the mixture is homogeneous.

[0060] Step 2: The reactor was placed in an autoclave and stored in a high-temperature oven at 140°C for 3 days. After the reactor cooled to room temperature, it was washed with N,N-dimethylformamide to remove impurities, and then dried at 60°C for 12 hours. Blue-black crystals were obtained, yielding product A.

[0061] Step 3: Place product A in an oven at 60°C for 12 hours to dry, and grind it in a mortar to obtain ZnMo multi-cluster photothermal material, i.e. powder B.

[0062] Step 4, preparation of polymer by high temperature stirring method: Hexamethylene diisocyanate, polytetrahydrofuran, and 30 mL of N,N-dimethylformamide are dissolved in a 100 mL round-bottom flask, and then 3 drops of dibutyltin dilaurate are added. The flask is set up on an oil bath magnetic stirrer and reacted in an oil bath at 70 °C for 5 h. After 5 h, urea (dissolved in a small amount of N,N-dimethylformamide) is added and the reaction is continued for another 5 h to obtain the polymer, namely polymer C.

[0063] Step 5: Powder B and polymer C are blended at a ratio of 1:10 and assembled into a self-healing photothermal evaporator for seawater desalination in actual water bodies.

[0064] Example 5

[0065] The preparation method of the ZnMo multi-cluster self-healing polymer photothermal material of the present invention is as follows: Figure 1 As shown, the specific operation steps are as follows:

[0066] Step 1, Hydrothermal preparation of ZnMo multi-cluster photothermal material precursor: Dissolve a mixture of zinc citrate dihydrate, molybdic acid, and 2-mercapto-5-methoxybenzimidazole in N,N-dimethylformamide. Seal the mixed solution in a 25mL polytetrafluoroethylene-lined reactor, place a magnetic stirrer, and stir magnetically until the mixture is homogeneous.

[0067] Step 2: The reactor was placed in an autoclave and stored in a high-temperature oven at 160°C for 3 days. After the reactor cooled to room temperature, it was washed with N,N-dimethylformamide to remove impurities, and then dried at 80°C for 12 hours. Blue-black crystals were obtained, yielding product A.

[0068] Step 3: Place product A in an oven at 80°C for 24 hours to dry, and grind it in a mortar to obtain ZnMo multi-cluster photothermal material, i.e. powder B;

[0069] Step 4, preparation of polymer by high temperature stirring method: Dissolve hexamethylene diisocyanate, polytetrahydrofuran, and 30 mL in a 100 mL round bottom flask, then add 3 drops of dibutyltin dilaurate, set up an oil bath magnetic stirrer, and react in an oil bath at 70 °C for 6 h. After 6 h, add urea (dissolved in a small amount of N,N-dimethylformamide) and continue the reaction for 6 h to obtain the polymer, namely polymer C;

[0070] Step 5: Powder B and polymer C are blended at a ratio of 1:10 and assembled into a self-healing photothermal evaporator for seawater desalination in actual water bodies.

[0071] like Figure 2 The image shows the XRD diffraction pattern of powder B, the precursor of the ZnMo multi-cluster photothermal material prepared in this invention. The pattern is based on the standard ZnMo framework (including Zn4Mo). 13 Zn6Mo 20 Zn8Mo 28 The XRD diffraction patterns of the two materials showed significant differences, and the XRD diffraction pattern of the present invention had low-frequency peaks, indicating that the ZnMo multi-cluster photothermal material precursor prepared by the present invention is a new crystal.

[0072] like Figure 3 The image shown is an infrared image of the surface of the ZnMo multi-cluster photothermal material precursor (powder B) of the present invention after 15 minutes of xenon lamp irradiation at an intensity of one solar day. The sample surface temperature rises to 55°C after 60 seconds of irradiation, exhibiting the fastest heating rate. The heating rate slows down between 60 and 240 seconds, reaching a maximum temperature of 85°C at 420 seconds. Within 15 seconds after the xenon lamp is turned off, the temperature drops rapidly to 70°C. Subsequently, the sample cools slowly, reaching room temperature at 900 seconds. This clearly demonstrates that the ZnMo multi-cluster photothermal material precursor (powder B) of the present invention possesses excellent photothermal conversion capabilities.

[0073] like Figure 4 The figure shows the temperature rise curve of the ZnMo multi-cluster photothermal material precursor of the present invention under xenon lamp irradiation for 10 minutes with a light intensity of one solar irradiance. At the beginning of irradiation, the temperature rises rapidly from 0-60 s, increasing from 27°C to 60°C. Between 60 s and 240 s, the temperature increase slightly decreases, rising from 60°C to 80°C. After 240 s, the temperature rises very slowly, reaching 85°C at 520 s. The temperature then tends to stabilize, indicating that the ZnMo multi-cluster photothermal material precursor (powder B) of the present invention possesses excellent photothermal conversion capabilities.

[0074] like Figure 5 The image shown is a cyclic image of the ZnMo multi-cluster photothermal material precursor of the present invention. Under one solar intensity, the photothermal material underwent 10 light irradiation tests. As time increased, the photothermal performance of the material tended to stabilize, and the temperature still reached 83°C, indicating that the ZnMo multi-cluster photothermal material precursor (powder B) of the present invention has excellent photothermal conversion capability and good stability.

[0075] like Figure 6The figure shows the temperature rise curve of the ZnMo multi-cluster self-healing polymer photothermal material of the present invention, with a precursor doping amount of 10%, under xenon lamp irradiation for 10 minutes at a light intensity of one solar volt. At the beginning of irradiation, the temperature rises rapidly from 24°C to 90°C within 0-60 seconds. Between 60-180 seconds, the temperature increase slightly decreases, rising from 90°C to 102°C. At 180 seconds, the temperature of the target sample reaches 102°C, and then tends to stabilize. This indicates that the ZnMo multi-cluster and polymer form a unique structure, enhancing the light absorption and conversion capability. Compared with the powder alone, the ZnMo multi-cluster self-healing polymer photothermal material of the present invention possesses superior photothermal conversion capability.

[0076] like Figure 7 The image shown is a microscopic image of the self-healing polymer photothermal material of the present invention, which is a ZnMo multi-cluster self-healing polymer. It can be seen that after scratching the material, the scratches disappear after 10 minutes, indicating that the material has achieved healing. This demonstrates that the self-healing polymer photothermal material prepared by the method of the present invention has a strong self-healing ability.

[0077] The synthesis principle of the key steps in this invention:

[0078] (I) A ZnMo multi-cluster photothermal material precursor was obtained using a simple method. The ZnMo multi-cluster structure should possess efficient light absorption and good photothermal conversion performance, effectively converting received solar energy into heat energy and accelerating the evaporation of water molecules. Mo typically has good light absorption properties, while Zn-based materials also exhibit good characteristics in optoelectronics. Therefore, this combination is beneficial for improving the overall photothermal conversion efficiency and self-healing performance.

[0079] (II) This invention employs a simple and controllable method to mix multi-cluster precursors with polymers. Hydrophobicity is a key characteristic of such materials; hydrophobic materials tend to repel water, reducing the contact area with water, a property with unique advantages. Under certain conditions, hydrophobic materials can reduce the resistance to water evaporation through the "lotus effect" (i.e., superhydrophobic surface), while simultaneously utilizing surface tension to promote rapid evaporation of water droplets, rather than forming a continuous liquid film. Furthermore, hydrophobicity also helps prevent microbial growth and corrosion, extending the material's service life.

Claims

1. A method for preparing a self-healing polymeric photothermal material based on ZnMo multi-cluster, characterized in that, Under the condition of hydrothermal method, introduce zinc citrate dihydrate, molybdate and 2-mercapto-5-methoxy benzimidazole ligand as one of raw materials, prepare ZnMo multi-cluster photo-thermal material precursor by modification, then through washing, high temperature annealing reaction, cooling to room temperature, obtain ZnMo multi-cluster photo-thermal material powder, blend it with polymer, prepare self-repairing photo-thermal water evaporation material; the specific operation steps are as follows: Step 1, prepare ZnMo multi-cluster photo-thermal material precursor by hydrothermal method Dissolve the mixture of zinc citrate dihydrate, molybdate and 2-mercapto-5-methoxy benzimidazole in N,N-dimethylformamide, seal the mixed solution in a polytetrafluoroethylene lined reactor, put it into a magnetic stirrer, and stir until the mixture is uniform; Step 2, put the reactor into an autoclave and dry it in a high temperature oven, after the reactor cools to room temperature, wash it with N,N-dimethylformamide to remove impurities, then dry it to obtain crystal product A; Step 3, dry product A in an oven at 60 ℃-80 ℃ for 12h-24h, and grind it with a mortar to obtain ZnMo multi-cluster photo-thermal material, i.e. powder B; Step 4, prepare polymer by high temperature stirring method Dissolve hexamethylene diisocyanate, polytetrahydrofuran and 30 mL N,N-dimethylformamide, then add dibutyltin dilaurate dropwise, build on an oil bath magnetic stirrer, react at 70 ℃ oil bath for 4-5h, then add urea and continue to react for 4-5h to obtain polymer, i.e. polymer C; Step 5, blend powder B with polymer C at a ratio of 1:10 to assemble into self-repairing polymer photo-thermal material.

2. The method for preparing a self-healing polymeric photothermal material based on ZnMo multi-cluster according to claim 1, characterized in that, The molar ratio of zinc citrate dihydrate, molybdate and 2-mercapto-5-methoxy benzimidazole in step 1 is 0.27:2.1:3.

0.

3. The preparation method of self-repairing polymer photo-thermal material based on ZnMo multi-cluster according to claim 2, the temperature of high temperature oven in step 2 is 140-160 ℃, and the time should be 72-96h.

4. The method for preparing ZnMo-based multi-cluster self-healing polymeric photothermal material according to claim 1, characterized in that, The drying temperature in step 2 is 60-80 ℃, and the time should be 12-24h.

5. The method for preparing ZnMo-based multi-cluster self-healing polymeric photothermal material according to claim 1, characterized in that, The grinding time of powder in the mortar in step 3 should be 10-20min.

6. The method for preparing ZnMo-based multi-cluster self-healing polymeric photothermal material according to claim 1, characterized in that, The urea in step 4 should be dissolved in N,N-dimethylformamide in advance.

7. Self-healing polymeric photothermal material based on ZnMo multi-cluster, characterized in that, The self-repairing polymer photo-thermal material is prepared by the preparation method of self-repairing polymer photo-thermal material based on ZnMo multi-cluster according to any one of claims 1-6.

8. The self-healing polymeric photothermal material based on ZnMo polycations according to claim 7, characterized in that, The self-repairing polymer photo-thermal material is used for seawater desalination of actual water body.

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