Aerogel with low interface thermal resistance and efficient PMS activation efficiency and preparation method and application thereof

Abstract

The invention belongs to the field of multifunctional materials, and relates to aerogel with low interface thermal resistance and efficient PMS activation efficiency as well as a preparation method and application of the aerogel. The preparation method comprises the following steps: firstly, mechanically exfoliating BN to construct a B defect, then introducing the B defect and cobalt-nickel bimetal into a 2H-MoS2 co-catalyst framework, successfully preparing a Ni-Co-2H-MoS2-BN (NCMB) diatomic composite catalyst by using a one-step hydrothermal method, filling the Ni-Co-2H-MoS2-BN (NCMB) diatomic composite catalyst into an aerogel matrix formed by polyacrylamide, and preparing NCMB-based porous hydrogel by using a cross-linking foaming polymerization method. The light aerogel is formed after freeze drying, the heat-conducting property is good, the PMS activation efficiency is high, the preparation method is simple, and the aerogel has wide application prospects in water treatment and seawater desalination.

Description

Technical Field

[0001] The present invention belongs to the field of multifunctional materials, and relates to an aerogel with low interfacial thermal resistance and high PMS activation efficiency, a preparation method thereof, and an application thereof. Background Art

[0002] Due to the rapid growth of the population and the promotion of industrial development, the demand for clean water is increasing day by day. Water resource shortage and pollution have become severe challenges for the development of a sustainable society. The sulfate radical-based advanced oxidation process (SR-AOP) is an efficient oxidation technology that uses sulfate radicals to degrade organic pollutants. With its high redox potential, wide application range, and excellent selectivity, it has attracted much attention in the construction of a synergistic photothermal catalytic system. Interfacial solar steam generation (ISSG) is a technology that uses photothermal materials to efficiently convert solar energy into heat energy, which is further used for water evaporation and steam generation. These two technologies have important research significance in water treatment and seawater desalination. In the integrated design of ISSG and SR-AOP, interfacial thermal resistance and accelerating the activation of PMS are the main problems that need to be solved urgently.

[0003] Due to the stable chemical composition of PMS, it is difficult to decompose itself in water. The existing technology uses MoS 2 to activate PMS to degrade organic pollutants. However, the activation of single MoS 2 has low catalytic efficiency due to limited active sites. When MoS 2 is used as a photothermal material in interfacial solar steam generation, there may be a high thermal resistance at the interface between MoS 2 and water, resulting in difficult heat transfer to the water surface, thus affecting the evaporation efficiency. Therefore, the present invention introduces bimetallic ions, which can not only improve the electron transfer rate and PMS activation efficiency by adjusting the coordination environment and electronic structure of MoS 2 , but also make the petals of MoS 2 nanoflowers brighter, thereby expanding the specific surface area. At the same time, boron nitride is introduced to make MoS 2 grow uniformly on BN nanosheets, ensuring good interfacial contact. BN can act as a structural skeleton and a heat transfer channel to further improve the water evaporation efficiency. Through the synergistic effect among the three, a bifunctional water treatment composite material with both low interfacial thermal resistance and high PMS activation efficiency is prepared. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides an aerogel with low interfacial thermal resistance and high PMS activation efficiency, and its preparation method and application. The NCMB cocatalyst is synthesized by a one-step hydrothermal method and filled into the aerogel matrix formed by polyacrylamide to prepare a bifunctional water treatment composite material with both low interfacial thermal resistance and high PMS activation efficiency. It has good thermal conductivity, high PMS activation efficiency, and has an efficient photocatalytic degradation effect on water pollutants such as methylene blue and rhodamine B, and has broad application prospects in water source treatment.

[0005] In order to achieve the object of the present invention, the technical solutions adopted are as follows:

[0006] The present invention provides a preparation method of an aerogel with low interfacial thermal resistance and high PMS activation efficiency, including the following steps:

[0007] (1) Preparation of NCMB cocatalyst: First, put BN into a ball mill to ball mill BN with a high B defect density and surface area, then weigh the ball-milled BN and add it to deionized water, and ultrasonically obtain a BN solution; then mix a molybdenum source, a sulfur source, a nickel salt, and a cobalt salt, add deionized water and stir to dissolve, then add the BN solution, stir evenly, carry out a hydrothermal reaction, cool to room temperature, wash and dry to obtain the NCMB cocatalyst;

[0008] (2) Preparation of NCMB-based aerogel: Disperse the NCMB cocatalyst in deionized water and stir overnight, then add acrylamide and N,N'-methylenebisacrylamide, ultrasonically mix, and quickly add sodium dodecyl sulfate under mechanical stirring to make the suspension full of bubbles, stir for ≥5 min, then add tetramethylethylenediamine, stir and react (reaction time ≥15 min), and finally add ammonium persulfate to form a solid hydrogel, and obtain the NCMB-based aerogel after freeze-drying.

[0009] Further, in step (1), the molybdenum source is ammonium molybdate hexahydrate, the sulfur source is thioacetamide or thiourea, the nickel salt is nickel chloride hexahydrate, the cobalt salt is cobalt nitrate hexahydrate, and the BN is hexagonal crystal form.

[0010] Further, in step (1), the molar ratio of molybdenum and sulfur elements in the molybdenum source and sulfur source is 1:4; the molar ratio of metal ions in the nickel salt and cobalt salt is 1:1; the total molar sum of metal ions in the nickel salt and cobalt salt accounts for 3.5% of the molar amount of molybdenum element in the molybdenum source.

[0011] Further, in step (1), the mass ratio of the ball-milled BN to the molybdenum source is 0.25 - 1:1.

[0012] Further, in step (1), the hydrothermal reaction temperature is 210 °C and the reaction time is 6 - 30 h.

[0013] Further, the solid-liquid ratio of the NCMB cocatalyst to deionized water in step (2) is 0.336 g to 0.84 g: 10 mL; the addition amount of the NCMB cocatalyst is 20% to 50% of the mass of acrylamide.

[0014] Preferably, the addition amount of the NCMB cocatalyst is 30% of the mass of acrylamide.

[0015] Further, the dosage ratio of acrylamide, N,N'-methylenebisacrylamide, sodium dodecyl sulfate, tetramethylethylenediamine and ammonium persulfate in step (2) is 1.68 g: 0.14 g: 0.012 g: 3 mL: 0.15 g.

[0016] The present invention also provides the application of the aerogel prepared by the above method in the treatment of water containing organic pollutants and the desalination of seawater containing organic pollutants.

[0017] Compared with the prior art, the present invention has the following main advantages and beneficial effects:

[0018] 1. In the present invention, MoS 2 is uniformly grown on BN by a hydrothermal method, improving the bonding performance between MoS 2 and BN, ensuring good interfacial contact, and thus reducing the interfacial thermal resistance of the material. Moreover, BN can serve as a structural support and a heat transfer medium, further improving the water evaporation efficiency. By introducing bimetallic atoms, the petals of the 2H-MoS 2 nanoflowers are brighter, thereby expanding the specific surface area, and effectively improving the heat collection and transfer efficiency to the thermally conductive BN channels.

[0019] 2. The introduced bimetallic atoms make the petals of the 2H-MoS 2 nanoflowers brighter, thereby increasing the specific surface area and improving the adsorption efficiency of PMS molecules. In addition, the introduction of the inert atom Ni reduces the adsorption energy barrier of PMS on NCMB, which is beneficial to the adsorption of PMS and the subsequent O-O bond cleavage to generate ROS. On the other hand, the interaction between the variable valence transition metal Co and the cocatalyst Mo accelerates the valence recovery and evolution between Co 2+ / Co 3+ and Mo 4+ / Mo 5+ / Mo 6+ and can efficiently activate PMS to degrade water pollutants. Description of the Drawings

[0020] Figure 1SEM images of the low-bandgap and defect-rich NCMB cocatalyst prepared in Example 2 at 200 nm and 500 nm: (a) is at 200 nm and (b) is at 500 nm;

[0021] Figure 2 SEM images of the NCMB aerogel prepared in Example 2 at 200 nm and 500 nm: (a) is at 200 nm and (b) is at 500 nm;

[0022] Figure 3 Comparative physical pictures of the NCMB-PH aerogels prepared in Examples 1-3, from left to right are Example 1, Example 2, and Example 3;

[0023] Figure 4 Comparison chart of the photocatalytic and water evaporation performance results of the aerogels prepared in Examples 2, 11, and 12;

[0024] Figure 5 For hydrothermally synthesized 2H-MoS without introducing BN and bimetallic atoms 2 (a) and SEM image (b) of the NCMB cocatalyst prepared in Example 2 at 500 nm. Detailed implementation manners

[0025] The present invention is not limited to the following specific implementation manners. Those of ordinary skill in the art can implement the present invention in other various specific implementation manners according to the content disclosed in the present invention, or those that adopt the design structure and idea of the present invention and make simple changes or modifications all fall within the protection scope of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0026] The present invention is further described in detail below in conjunction with embodiments:

[0027] Example 1

[0028] (1) First, 4 g of commercial BN was put into a ball mill and ball milled at 800 r / min for 12 min to prepare BN with a high B defect density and surface area. 310 mg of defective BN was weighed into a 100 mL beaker, and 20 mL of deionized water was added and sonicated for 1 h; then 1.236 g of ammonium molybdate tetrahydrate and 2.128 g of thiourea were weighed into a 100 mL beaker. The molar ratio of molybdenum and sulfur in ammonium molybdate tetrahydrate and thiourea was 1:4. Then 0.0291 g of nickel chloride hexahydrate (NiCl 2 .6H 2 O) and 0.0356 g of cobalt nitrate hexahydrate (Co(NO 3 ) 2 .6H 2(O), 30 mL of deionized water was added and stirred until completely dissolved, then it was added to the BN solution. A magnetic stir bar was placed and stirred for 1 h. Then the solution was transferred to an autoclave and reacted at 210 °C for 24 h. After the solution was cooled to room temperature, it was washed with water and ethanol multiple times to remove unreacted reagents and other impurities, and then dried in an oven at 60 °C to obtain the NCMB cocatalyst. The metal ion ratio was [M] / [Mo] = 3.5%, where M was the sum of [Ni] and [Co], and the ratio of [Ni] to [Co] was 1:1.

[0029] (2) 0.336 g of the NCMB cocatalyst synthesized in (1) was weighed and added to 10 mL of deionized water, and stirred overnight to obtain an NCMB suspension.

[0030] (3) 10 mL of the NCMB suspension, 1.68 g of acrylamide (AM), and 0.14 g of N,N'-methylenebisacrylamide (MBA) were ultrasonically mixed for 10 min, and then 12 mg of sodium dodecyl sulfate (SDS) was added under rapid mechanical stirring, and then stirred for 5 min to make the suspension full of bubbles.

[0031] (4) 3 mL of tetramethylethylenediamine was pipetted as a catalyst and added to the suspension in step (3), and stirred for 15 min. The amount of bubbles decreased, and a fluid hydrogel began to form.

[0032] (5) 0.15 g of ammonium persulfate was weighed as a forming agent, and the fluid hydrogel quickly turned into a solid hydrogel, and then freeze-dried (-50 °C, 24 h) to form an NCMB-based aerogel, denoted as NCMB-PH.

[0033] The prepared NCMB-PH was used for the catalytic degradation of MB: Methylene blue (MB) and deionized water were mixed to prepare an MB solution with a concentration of 0.01 mg / mL. 100 mL of the prepared MB solution was placed in a 200 mL beaker, 20 mg of potassium persulfate was added, 2 g of NCMB-PH was added, and a rotor was added. First, the beaker was stirred in the dark for 10 min, and then under the irradiation of a 300 w xenon lamp, samples were taken every 5 min, 3 mL each time. The absorbance of the samples was measured at 664 nm using a visible spectrophotometer, and a total of 10 samples were taken to observe the degradation effect of NCMB-PH on MB. The degradation rate of NCMB-PH on MB within 10 min was 89%.

[0034] Preparation of NCMB-PH interfacial photocatalytic steam conversion experiment: Prepare a 3.5% sodium chloride solution to simulate seawater. Take 100 mL of the 3.5% sodium chloride solution and add it to a 200 mL beaker. Then add NCMB-PH with a radius of 1.5 cm and a thickness of 0.5 cm. This experiment is carried out under a 300 W xenon lamp, and at the same time, a blank test without NCMB-PH is conducted as a control for a 6-hour interfacial photocatalytic steam conversion experiment. The water evaporation amount of NCMB-PH is 3.23 kg / m 2 / h.

[0035] Example 2

[0036] The difference between Example 2 and Example 1 is that the addition amount of NCMB in step (2) is 0.504 g.

[0037] For the NCMB-PH prepared in Example 2, the degradation rate of NCMB-PH to MB within 10 min is 98%, and the water evaporation amount is 4.457 kg / m 2 / h.

[0038] Example 3

[0039] The difference between Example 3 and Example 1 is that the addition amount of NCMB in step (2) is 0.84 g.

[0040] For the NCMB-PH prepared in Example 3, the degradation rate of NCMB-PH to MB within 10 min is 92%, and the water evaporation amount is 3.18 kg / m 2 / h.

[0041] Example 4

[0042] The difference between Example 4 and Example 2 is that the addition amount of BN in step (1) is 620 mg.

[0043] For the NCMB-PH prepared in Example 4, the degradation rate of NCMB-PH to MB within 10 min is 95%, and the water evaporation amount is 2.821 kg / m 2 / h.

[0044] Example 5

[0045] The difference between Example 5 and Example 2 is that the addition amount of BN in step (1) is 1240 mg.

[0046] For the NCMB-PH prepared in Example 5, the degradation rate of NCMB-PH to MB within 10 minutes reaches 97%, and the water evaporation amount is 2.128 kg / m 2 / h.

[0047] Example 6

[0048] Example 6 is different from Example 2 in that: in step (1), [M] / [Mo] (M = [Ni] + [Co], [Ni]:[Co] = 1:1) = 7%

[0049] For the NCMB-PH prepared in Example 6, the degradation rate of NCMB-PH to MB within 10 min is 73%. This degradation efficiency is comparable to that of the spinel composite catalyst CMO / CFO under similar conditions, and the water evaporation rate is 2.414 kg / m 2 / h.

[0050] Example 7

[0051] Example 7 is different from Example 2 in that: in step (1), [M] / [Mo] (M = [Co]) = 3.5%, that is, no nickel salt is added.

[0052] For the CMB-PH prepared in Example 7, the degradation rate of CMB-PH to MB within 10 min is 65%, and the water evaporation rate is 1.983 kg / m 2 / h.

[0053] Example 8

[0054] Example 8 is different from Example 2 in that: in step (1), [M] / [Mo] (M = [Ni]) = 3.5%, that is, no cobalt salt is added.

[0055] For the NMB-PH prepared in Example 8, the degradation rate of NMB-PH to MB within 10 min is 77%, and the water evaporation rate is 2.11 kg / m 2 / h.

[0056] Example 9

[0057] Example 9 is different from Example 2 in that: in step (1), the hydrothermal reaction time is 6 h.

[0058] For the NCMB-PH prepared in Example 9, the degradation rate of NCMB-PH to MB within 10 min is 79%, and the water evaporation rate is 2.04 kg / m 2 / h.

[0059] Example 10

[0060] Example 10 is different from Example 2 in that: in step (1), the hydrothermal reaction time is 30 h.

[0061] For the NCMB-PH prepared in Example 10, the degradation rate of NCMB-PH to MB within 10 min is 71%, and the water evaporation rate is 2.12 kg / m 2 / h.

[0062] Example 11

[0063] Example 11 is different from Example 2 in that nickel chloride hexahydrate and cobalt nitrate hexahydrate are not added in step (1). The specific operation is as follows:

[0064] (1) First, put 4 g of commercial BN into a ball mill and mill it at 800 r / min for 12 min to prepare BN with a high B defect density and surface area. Weigh 310 mg of defective BN into a 100 mL beaker, add 20 mL of deionized water, and sonicate for 1 h; then weigh 1.236 g of ammonium molybdate tetrahydrate and 2.128 g of thiourea into a 100 mL beaker, add 30 mL of deionized water and stir until completely dissolved, then add it to the BN solution, put in a magnetic stirrer, stir for 1 h, and then transfer the solution to an autoclave and react at 210 °C for 24 h. After the solution is cooled to room temperature, wash it with water and ethanol multiple times to remove unreacted reagents and other impurities, and dry it in an oven at 60 °C to obtain the MB cocatalyst.

[0065] (2) Weigh 0.336 g of the MB cocatalyst synthesized in (1) and add it to 10 mL of deionized water and stir overnight to obtain an MB suspension.

[0066] (3) After ultrasonic mixing of 10 mL of the MB suspension, 1.68 g of acrylamide (AM), and 0.14 g of N,N'-methylenebisacrylamide (MBA) for 10 min, add 12 mg of sodium dodecyl sulfate (SDS) under rapid mechanical stirring, and then stir for 5 min to fill the suspension with bubbles.

[0067] (4) Use a pipette to aspirate 3 mL of tetramethylethylenediamine as a catalyst and add it to the suspension in step (3), stir for 15 min, the amount of bubbles decreases, and a fluid hydrogel begins to form.

[0068] (5) Weigh 0.15 g of ammonium persulfate as a forming agent, the fluid hydrogel quickly turns into a solid hydrogel, and then freeze-dry it to form an MB-based aerogel, denoted as MB-PH.

[0069] For the MB-PH prepared in Example 11, the degradation rate of MB-PH to MB within 10 min is 69%, and the water evaporation rate is 3.16 kg / m 2 / h.

[0070] Example 12

[0071] Example 12 is different from Example 2 in that BN is not added in step (1). The specific operation is as follows:

[0072] (1) Weigh 1.236 g of ammonium molybdate tetrahydrate and 2.128 g of thiourea into a 100 mL beaker, and then add 0.0291 g of nickel chloride hexahydrate (NiCl 2 .6H 2O) and 0.0356 g of cobalt(II) nitrate hexahydrate (Co(NO 3 ) 2 .6H 2 O). After adding 30 mL of deionized water and stirring until completely dissolved, a magnetic stir bar was added and the mixture was stirred for 1 h. Then the solution was transferred to an autoclave and reacted at 210 °C for 24 h. After the solution was cooled to room temperature, it was washed repeatedly with water and ethanol to remove unreacted reagents and other impurities, and then dried in an oven at 60 °C to obtain the NCM cocatalyst.

[0073] (2) 0.336 g of the NCM cocatalyst synthesized in (1) was weighed and added to 10 mL of deionized water, and the mixture was stirred overnight to obtain an NCM suspension.

[0074] (3) After ultrasonic mixing of 10 mL of the NCM suspension, 1.68 g of acrylamide (AM), and 0.14 g of N,N'-methylenebisacrylamide (MBA) for 10 min, 12 mg of sodium dodecyl sulfate (SDS) was added under rapid mechanical stirring, and then the mixture was stirred for 5 min to fill the suspension with bubbles.

[0075] (4) 3 mL of tetramethylethylenediamine was pipetted as a catalyst and added to the suspension in step (3), and the mixture was stirred for 15 min. The amount of bubbles decreased and a fluid hydrogel began to form.

[0076] (5) 0.15 g of ammonium persulfate was weighed as a forming agent, and the fluid hydrogel quickly turned into a solid hydrogel, which was then freeze-dried to form an NCM-based aerogel, denoted as NCM-PH.

[0077] For the NCM-PH prepared in Example 12, the degradation rate of MB by NCM-PH within 10 min was 91%, and the water evaporation rate was 2.02 kg / m 2 / h.

[0078] (1) From the test results of Examples 1-3 above, it can be seen that after changing the addition amount of the NCMB cocatalyst, Example 2 showed the highest water evaporation rate and the best photocatalytic degradation effect of MB, indicating that when the addition amount of the NCMB cocatalyst was 30% of the mass of acrylamide in the gel skeleton, the effect was optimal.

[0079] (2) From the comparison of Examples 2, 4, and 5, it can be seen that adjusting the addition amount of BN had no obvious effect on the final photocatalytic degradation of pollutants, while the water evaporation rate reached a peak when the addition amount of BN was 442 mg. In addition, although the addition of BN could increase the heat transfer channels of MoS 2 , excessive BN would lead to an increase in the material interface, thereby causing an increase in the interfacial thermal resistance and a decrease in the thermal conductivity.

[0080] (3) As can be seen from Examples 2, 6 - 8, the change in the metal ratio has a great impact on both the photocatalytic effect and the water evaporation rate. The optimal metal ratio is determined to be [M] / [Mo] = 3.5%, where M is the sum of [Ni] and [Co], and the ratio of [Ni] to [Co] is 1:1.

[0081] (4) By comparing Examples 2, 9, and 10, it can be seen that the hydrothermal reaction time has a great impact on the photocatalytic effect and the water evaporation rate. The optimal reaction conditions are a high - pressure reaction at 210°C for 24 h.

[0082] (5) As can be seen from Examples 2, 11, and 12, when adding only BN, it can only meet the higher water evaporation effect while the photocatalytic effect decreases significantly. When adding only metal Co / Ni, it can only meet the better photocatalytic effect while the water evaporation efficiency decreases significantly.

[0083] In summary, by optimizing the dosage, ratio of each component and its reaction conditions, and utilizing the synergistic effect among molybdenum sulfide, boron nitride, and bimetallic atoms, the present invention prepares a bifunctional composite material with both low interfacial thermal resistance and high PMS activation efficiency.

[0084] The above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0085] The above - mentioned is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent replacements or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A method for preparing an aerogel with low interfacial thermal resistance and high PMS activation efficiency, characterized in that: The steps include: (1) Preparation of NCMB co-catalyst: First, BN is placed in a ball mill to prepare BN with high B defect density and surface area, and then the ball-milled BN is weighed and added to deionized water, and ultrasonic treatment is performed to obtain a BN solution; then a molybdenum source, a sulfur source, a nickel salt, and a cobalt salt are mixed, added to deionized water, stirred and dissolved, and then the BN solution is added, stirred evenly, and then a hydrothermal reaction is performed. After cooling to room temperature, the mixture is washed and dried to obtain the NCMB co-catalyst; (2) Preparation of NCMB-based aerogel: The NCMB co-catalyst was dispersed in deionized water and stirred overnight. Then, acrylamide and N,N-methylenebisacrylamide were added. After ultrasonic mixing, sodium dodecyl sulfate was added under rapid mechanical stirring to fill the suspension with bubbles. Tetramethylethylenediamine was then added and stirred for reaction. Finally, ammonium persulfate was added to form a solid hydrogel. After freeze-drying, the NCMB-based aerogel was obtained.

2. The method for preparing aerogel with low interfacial thermal resistance and high PMS activation efficiency according to claim 1, characterized in that: In step (1), the molybdenum source is hexaammonium molybdate tetrahydrate, the sulfur source is thioacetamide or thiourea, the nickel salt is nickel chloride hexahydrate, the cobalt salt is cobalt nitrate hexahydrate, and the BN is a hexagonal crystal.

3. The method for preparing aerogel with low interfacial thermal resistance and high PMS activation efficiency according to claim 1, characterized in that: In step (1), the molar ratio of molybdenum to sulfur in the molybdenum source and the sulfur source is 1:4; the molar ratio of metal ions in the nickel salt and the cobalt salt is 1:1; and the total molar amount of metal ions in the nickel salt and the cobalt salt accounts for 3.5% of the molar amount of molybdenum in the molybdenum source.

4. The method for preparing aerogel with low interfacial thermal resistance and high PMS activation efficiency according to claim 1, characterized in that: The mass ratio of BN to molybdenum source after ball milling in step (1) is 0.25 to 1:

1.

5. The method for preparing aerogel with low interfacial thermal resistance and high PMS activation efficiency according to claim 1, characterized in that: The hydrothermal reaction temperature in step (1) is 210° C. and the reaction time is 6-30 h.

6. The method for preparing aerogel with low interfacial thermal resistance and high PMS activation efficiency according to claim 1, characterized in that: The solid-liquid ratio of the NCMB co-catalyst to deionized water in step (2) is 0.336 g to 0.84 g: 10 mL; the amount of the NCMB co-catalyst added is 20% to 50% of the mass of acrylamide.

7. The method for preparing aerogel with low interfacial thermal resistance and high PMS activation efficiency according to claim 1, characterized in that: The usage ratio of acrylamide, N,N-methylenebisacrylamide, sodium dodecyl sulfate, tetramethylethylenediamine and ammonium persulfate in step (2) is 1.68 g: 0.14 g: 0.012 g: 3 mL: 0.15 g.

8. Use of the aerogel prepared according to the method according to any one of claims 1 to 7 in the treatment of water containing organic pollutants and the desalination of seawater containing organic pollutants.

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