A carbon nanotube aerogel material, its preparation method and application

Abstract

The present invention provides a carbon nanowire aerogel material, a preparation method thereof and an application thereof, belonging to the technical field of aerogel preparation; the present invention first synthesizes a covalent organic framework (COF) precursor substance, then converts it into a COF wet gel, and then through solvent replacement, freeze-drying, high-temperature heat treatment, finally obtains a carbon nanowire aerogel material. The process is simple to operate, and the structure of the prepared material is controllable; and when the relative pressure is 1, the carbon nanowire aerogel material prepared by the present invention can adsorb 1200 mg / g of toluene vapor. In addition, when the carbon nanowire aerogel material prepared by the present invention is used as a supercapacitor electrode material, the capacitance value is 215 F / g at a scanning rate of 20 mV / s.

Description

Technical Field

[0001] The invention belongs to the technical field of aerogel preparation, and in particular relates to a carbon nanowire aerogel material and a preparation method and application thereof. Background Art

[0002] As an advanced porous carbon material, carbon nanowire aerogel exhibits many unique properties, indicating that it has a wide range of application potential in many fields. First of all, its high specific surface area and porous structure provide a unique platform for adsorption, catalysis and even energy storage. This structural characteristic not only makes carbon nanowire aerogel an ideal choice for adsorbing harmful compounds and as a catalyst carrier, but also gives it great application prospects in the field of supercapacitors. In terms of supercapacitors, the high specific surface area and porous structure of carbon nanowire aerogel greatly promote the rapid diffusion and effective contact of ions in the electrolyte, increasing the capacity and rate of charge storage. These characteristics enable aerogel electrodes to provide higher energy density and power density, and are one of the key materials for realizing high-performance supercapacitors. At the same time, its excellent adsorption capacity allows carbon nanowire aerogel to perform well in environmental protection fields such as air purification and water treatment, and can effectively remove pollutants in the air and harmful substances in the water. As a catalyst carrier, its structural advantages promote the efficiency and selectivity of catalytic reactions, further broadening its application range in the chemical industry. In summary, carbon nanowire aerogel, with its unique structure and properties, has shown great application potential and value in many fields such as supercapacitors, environmental protection, and catalytic reactions, providing innovative solutions for solving environmental pollution problems and improving energy storage efficiency.

[0003] However, existing carbon nanowire aerogels and preparation methods have the following problems:

[0004] (1) Most of the reported methods are carbon aerogels, while there are few methods for preparing carbon nanowire aerogels;

[0005] (2) The pore structure of carbon nanowire aerogel is not uniform enough, which leads to the instability of the adsorption performance of carbon nanowire aerogel materials; the specific surface area is small and the adsorption efficiency is low;

[0006] (3) Low mechanical strength and easy breakage limit the durability and service life of aerogels in practical applications;

[0007] (4) Difficulty in controlling pore structure: It is difficult to accurately control the pore structure of carbon nanowire aerogel during the preparation process, which affects its adsorption performance;

[0008] (5) High cost, high energy consumption, and long preparation cycle: The preparation of high-quality carbon nanowire aerogels usually requires complex technological processes and expensive raw materials, which results in relatively high production costs. Moreover, the existing preparation of carbon nanowire aerogels generally requires multiple steps of chemical treatment and drying processes, and the entire preparation cycle is relatively long. This not only increases the production cost but also limits its ability to be rapidly mass-produced.

[0009] In addition, the prior art also discloses the use of composite aerogels for adsorbing toluene vapor, such as "Wang Wei et al., Preparation of Composite Aerogels and Adsorption Tests for Toluene, 2018" in Fire Science and Technology. First, the preparation process of this composite aerogel is cumbersome, which not only increases the production cost but also makes it difficult to precisely control the pore structure of the composite aerogel. Second, the composite aerogel prepared by it has a low adsorption efficiency for toluene, and its adsorption capacity is only 243 mg / g. Similarly, in the field of supercapacitors, although current electrode materials such as activated carbon have a relatively high specific surface area, it is difficult to ensure the uniformity and connectivity of their pore structures, thereby affecting the performance of supercapacitors. Especially in the application of supercapacitors pursuing high energy density and long cycle life, the electrochemical performance of existing materials often fails to meet the requirements, such as problems like low capacitance value and poor cycle stability, which limit their wide application in high-performance energy storage systems.

[0010] Therefore, there is an urgent need to provide a method for preparing carbon nanowire aerogels with a simple preparation process, and capable of preparing carbon nanowire aerogels with a stable and uniform porous structure, a large specific surface area, high mechanical strength, high adsorption capacity for toluene, and excellent supercapacitor performance. Summary of the Invention

[0011] In view of the above technical problems, the present invention provides a carbon nanowire aerogel material, its preparation method, and its application.

[0012] To achieve the above object, the present invention provides the following technical solutions:

[0013] One of the technical solutions of the present invention:

[0014] A preparation method of a carbon nanowire aerogel material, comprising the following steps:

[0015] Add 2,5-diaminobenzonitrile and di-tert-butyl dicarbonate to an organic solvent, stir and react, separate and purify to obtain a COF precursor substance;

[0016] Perform a solvothermal reaction on 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde, the COF precursor substance, and trifluoroacetic acid in a mixed solvent (at this time, a COF wet gel is obtained); then perform solvent replacement and freeze-drying to obtain a COF aerogel;

[0017] The COF aerogel is heat-treated to obtain a carbon nanowire aerogel material.

[0018] Advantageous effects: The present invention synthesizes a COF wet gel by the sol-gel method. This method can be prepared through a simple chemical reaction under solvothermal conditions; among them, by synthesizing the COF precursor substance and controlling the overall synthesis conditions, the precise control of the structure and properties of the COF aerogel and the final carbon nanowire aerogel material can be realized to meet the requirements of different application scenarios.

[0019] Preferably, the molar ratio of 2,5-diaminobenzonitrile to di-tert-butyl dicarbonate is 1:2 to 1:8;

[0020] The dosage ratio of 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde, the COF precursor substance and trifluoroacetic acid is 2 mmol: 3 mmol: 20 μL.

[0021] Advantageous effects: Under the conditions of the types of reactants and their dosage ratios defined in the present invention, a uniform COF wet gel can be formed; if the types of reactants and dosage ratios defined in the present invention are not used, it will be unfavorable for the formation of the COF wet gel, and even a material with a nanowire structure cannot be obtained.

[0022] Preferably, the organic solvent is tetrahydrofuran, ethyl acetate or acetone.

[0023] Advantageous effects: The present invention selects tetrahydrofuran, ethyl acetate or acetone as the organic solvent, which can effectively improve the separation purity; if other solvents are used, it will have an adverse effect on the separation purity.

[0024] Preferably, the stirring reaction time is 8 to 12 h; the stirring speed is 500 to 1000 rpm.

[0025] Preferably, the separation and purification include distillation and recrystallization.

[0026] Furthermore, the recrystallization is: dissolving the bottom product after distillation with dichloromethane, adding petroleum ether to precipitate the solid and filtering and separating.

[0027] Preferably, the mixed solvent is a mixture of dioxane and water, and the volume ratio of the two is 8:1 to 4:1.

[0028] Advantageous effects: The above-defined volume ratio in the present invention is beneficial to the uniform dispersion of 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde and the COF precursor substance.

[0029] Preferably, the specific operation of the solvent replacement is: sequentially replacing the product after the solvothermal reaction with tetrahydrofuran and tert-butanol.

[0030] Beneficial effects: Through the replacement of tetrahydrofuran and tert-butanol and freeze-drying treatment in the present invention, it helps to remove residual solvents, while maintaining the pore structure of the COF aerogel, improving the stability and operability of the material.

[0031] Furthermore, the tetrahydrofuran needs to be replaced continuously for 4 times; the tert-butanol needs to be replaced continuously for 3 times.

[0032] Preferably, the conditions for the solvothermal reaction are: carrying out the solvothermal reaction at 120 °C for 72 h.

[0033] Beneficial effects: By carrying out the solvothermal reaction at 110 - 180 °C for 24 - 72 h in the present invention, it is beneficial to the formation of the COF wet gel.

[0034] Preferably, the conditions for the heat treatment are: carrying out the heat treatment at 600 - 1000 °C for 1 - 3 h.

[0035] Beneficial effects: By high-temperature heat treatment, the COF aerogel is transformed into a carbon nanowire aerogel material in the present invention. This method is simple and efficient, and can realize the transformation of the COF aerogel into the carbon nanowire aerogel in a short time.

[0036] The second technical solution of the present invention:

[0037] The carbon nanowire aerogel material prepared by the above preparation method.

[0038] Preferably, the specific surface area of the carbon nanowire aerogel material is 910 - 1032 m 2 g -1 ; the pore volume is 1.1 - 1.3 cm 3 / g; the density is 145 - 165 mg / cm 3 .

[0039] The third technical solution of the present invention:

[0040] The application of the above carbon nanowire aerogel material in the field of adsorbing toluene vapor.

[0041] Preferably, when the relative pressure is 1, the adsorption capacity of the carbon nanowire aerogel material for toluene vapor is 1200 mg / g.

[0042] The fourth technical solution of the present invention:

[0043] The application of the above carbon nanowire aerogel material in the field of supercapacitors.

[0044] Preferably, when the carbon nanowire aerogel material is used as the electrode material of the supercapacitor, the capacitance value of the supercapacitor is 215 F / g at a scanning speed of 20 mV / s.

[0045] Compared with the prior art, the present invention has the following advantages and technical effects:

[0046] The present invention provides a method for preparing a carbon nanowire aerogel material with a simple process; the prepared carbon nanowire aerogel material also has the characteristics of controllable structure, excellent conductivity (the carbon nanowire aerogel material prepared in Example 1 has a conductivity of 100 S / m), and a large surface area; further, it has broad application potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments and descriptions thereof of this application are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0048] Figure 1 is the X-ray diffraction pattern of the carbon nanowire aerogel prepared in Example 1 of the present invention;

[0049] Figure 2 is the nitrogen adsorption-desorption isotherm of the carbon nanowire aerogel prepared in Example 1 of the present invention;

[0050] Figure 3 is the scanning electron microscope image of the carbon nanowire aerogel prepared in Example 1 of the present invention;

[0051] Figure 4 is the physical picture of the carbon nanowire aerogel prepared in Example 1 of the present invention;

[0052] Figure 5 is the adsorption-desorption curve of the carbon nanowire aerogel prepared in Example 1 of the present invention for pure toluene vapor at 25°C;

[0053] Figure 6 is the X-ray photoelectron spectroscopy spectrum of the carbon nanowire aerogel prepared in Example 1 of the present invention;

[0054] Figure 7 is the cyclic voltammetry curve of the carbon nanowire aerogel prepared in Example 1 of the present invention;

[0055] Figure 8 is the nitrogen adsorption-desorption isotherm of the carbon nanowire aerogel prepared in Example 2 of the present invention;

[0056] Figure 9 is the nitrogen adsorption-desorption isotherm of the carbon nanowire aerogel prepared in Example 3 of the present invention;

[0057] Figure 10 is the cyclicity test of the carbon nanowire aerogel prepared in Example 3 of the present invention for the adsorption of pure toluene vapor at 25°C;

[0058] Figure 11 X-ray photoelectron spectroscopy spectrum of the carbon nanowire aerogel prepared in Comparative Example 1;

[0059] Figure 12 Nitrogen adsorption-desorption isotherm of the carbon nanowire aerogel prepared in Comparative Example 1;

[0060] Figure 13 Adsorption-desorption curve of the carbon nanowire aerogel prepared in Comparative Example 1 for pure toluene vapor at 25 °C. Detailed Description of the Invention

[0061] The various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, characteristics, and embodiments of the present invention.

[0062] It should be understood that the terms used in the present invention are only for describing specific embodiments and are not intended to limit the present invention. Additionally, for the numerical ranges in the present invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each intermediate value within any stated value or stated range, as well as each smaller range between any other stated value or intermediate value within the stated range, is also included in the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0063] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Although the present invention only describes preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials related to the documents. In case of conflict with any incorporated document, the content of this specification shall prevail.

[0064] Without departing from the scope or spirit of the present invention, various improvements and changes can be made to the specific embodiments of the present invention specification, which are obvious to those skilled in the art. Other embodiments obtained from the specification of the present invention are obvious to those skilled in the art. The specification and examples of the present invention are only exemplary.

[0065] Regarding the use of "comprising", "including", "having", "containing", etc. in this article, they are all open-ended terms, meaning including but not limited to.

[0066] As used in the present invention, "room temperature" refers to 20 - 30 °C unless otherwise specified.

[0067] All raw materials used in the present invention are obtained by purchasing on the market.

[0068] The technical solution of the present invention will be further described below through embodiments.

[0069] Example 1

[0070] (1) Add 2,5-diaminobenzonitrile (10 mmol) to a 250 mL round-bottom flask, then add 100 mL of tetrahydrofuran and 8.73 g (40 mmol) of di-tert-butyl dicarbonate, and stir the reaction at 600 rpm at room temperature for 12 h;

[0071] (2) After the reaction, distill out tetrahydrofuran, dissolve the bottom product with dichloromethane, then add a large amount of petroleum ether to precipitate the solid, and filter to separate the solid product, which is the COF precursor substance;

[0072] (3) Add 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde (0.06 mmol) and the above-separated solid product (0.09 mmol) to a 25 mL vial; then add 3.40 mL of dioxane and 0.60 mL of water, and ultrasonically mix (ultrasonic frequency is 250 W, time is 30 min) evenly, and then add 60 μL of trifluoroacetic acid; then carry out a solvothermal reaction in an oven at 120 °C for 72 h to obtain a COF wet gel;

[0073] (4) Replace the obtained COF wet gel with tetrahydrofuran 4 times and tert-butanol 3 times, and then freeze-dry at -50 °C for 48 h to obtain a COF aerogel;

[0074] (5) Heat-treat the COF aerogel in a tube furnace at 800 °C for 2 h to obtain a carbon nanowire aerogel material.

[0075] Figure 1X-ray diffraction pattern of the carbon nanowire aerogel prepared in Example 1 of the present invention; From the X-ray diffraction data, the diffraction peak at 26° corresponds to the (002) crystal plane of the graphitized carbon material. This indicates that there is a certain degree of graphitized carbon structure in the sample. The diffraction peak near 44° corresponds to the (100) crystal plane, which is also one of the characteristic peaks of the graphitized carbon material. This XRD pattern shows that there is a certain degree of graphitized carbon structure in the carbon nanowire aerogel sample, but it also contains a large amount of amorphous carbon. Among them, the graphitized carbon has a highly ordered hexagonal layered structure, which can provide a large specific surface area and a stable pore structure; and the graphitized carbon structure has ordered micropores and mesopores, and these pores contribute to the efficient adsorption of toluene vapor molecules; in addition, the graphitized carbon structure has good cycle stability and shows good durability in repeated adsorption-desorption cycles. The pore structure of amorphous carbon can provide a large specific surface area, which helps to increase the total adsorption capacity. Therefore, both graphitized carbon structure and amorphous carbon structure coexist in the carbon nanowire aerogel prepared in Example 1 of the present invention, and this combination can provide a material with both highly ordered pores and a large specific surface area, which can improve the adsorption effect on toluene vapor.

[0076] Figure 2 Nitrogen adsorption-desorption isotherm of the carbon nanowire aerogel prepared in Example 1 of the present invention; It can be seen from the figure that the specific surface area of the carbon nanowire aerogel is about 1030m 2 g -1 .

[0077] Figure 3 Scanning electron microscope image of the carbon nanowire aerogel prepared in Example 1 of the present invention; Under the condition of a relatively high magnification (50.0k times), it can be seen from Figure 3 that the carbon nanowires show a network structure and are intertwined with each other to form a three-dimensional network.

[0078] It can also be seen that:

[0079] 1. The diameter of the carbon nanowires is very small, usually in the range of several nanometers to dozens of nanometers.

[0080] 2. The structure of the aerogel is highly porous (the pore size of the network composed of nanowires is in the range of dozens to hundreds of nanometers), and this high specific surface area characteristic helps it to be applied in many fields.

[0081] 3. The connection points and intersection points between the nanowires make the whole structure have a certain mechanical strength and stability.

[0082] Figure 4 Physical picture of the carbon nanowire aerogel prepared in Example 1 of the present invention; It can be seen from Figure 4 that the aerogel is a black bulk material. After measurement, its density is 150mg / cm3 。

[0083] Figure 5 This is the adsorption - desorption curve of the carbon nanotube aerogel prepared in Example 1 of the present invention for pure toluene vapor at 25°C (the solid curve represents adsorption, and the hollow curve represents desorption).

[0084] From Figure 5 it can be seen that as the relative pressure increases, the adsorption capacity of the carbon nanotube aerogel for toluene vapor increases significantly. Especially at high relative pressures, the adsorption capacity rises rapidly. This indicates that the carbon nanotube aerogel has a strong adsorption ability for toluene at high relative pressures. When the relative pressure is close to 1, the adsorption capacity is close to 1200 mg / g, which shows that this material has an extremely high adsorption ability for toluene.

[0085] Figure 6 This is the X - ray photoelectron spectroscopy spectrum of the carbon nanotube aerogel prepared in Example 1 of the present invention. From Figure 6 it can be seen that the carbon nanotube aerogel prepared in Example 1 contains three elements: carbon (C), nitrogen (N), and oxygen (O). The atomic percentage of nitrogen element is 8.6%.

[0086] Figure 7 This is the cyclic voltammogram of the carbon nanotube aerogel prepared in Example 1 of the present invention. That is, within the voltage range of 0 - 1V, the electrochemical performance of the material is tested by a two - electrode method in a 1.0 M sulfuric acid electrolyte. The test electrode contains 85 wt.% of the active material (i.e., the carbon nanotube aerogel prepared in Example 1), 5 wt.% of polytetrafluoroethylene, and 10 wt.% of conductive carbon black. From Figure 7 it can be seen that when the prepared carbon nanotube aerogel is used as the electrode material of a supercapacitor, the capacitance value is 215 F / g at a scanning rate of 20 mV / s.

[0087] Example 2

[0088] The difference between this example and Example 1 is that: the solvothermal reaction time in step (3) is 24 h. Other conditions are the same as those in Example 1.

[0089] Figure 8 This is the nitrogen adsorption - desorption isotherm of the carbon nanotube aerogel prepared in Example 2; it can be seen from the figure that the specific surface area and pore volume of the carbon nanotube aerogel are 910 m 2 g -1 and 1.1 cm 3 / g respectively. It shows that changing the solvothermal time has a certain influence on the specific surface area of the carbon nanotube aerogel, but the materials obtained within the solvothermal time range defined in the present invention still have a relatively high specific surface area. The density of this carbon nanotube aerogel is 165 mg / cm 3 .

[0090] Example 3

[0091] The difference between this example and Example 1 is that: in step (5), the heat treatment temperature of the tubular furnace is 1000 °C. Other conditions are the same as those in Example 1.

[0092] Figure 9 Figure shows the nitrogen adsorption - desorption isotherm of the carbon nanotube aerogel prepared in Example 3; it can be seen from the figure that the specific surface area and pore volume of the carbon nanotube aerogel are 980 m 2 g -1 and 1.2 cm 3 / g respectively. It shows that the heat treatment temperature of the tubular furnace has a certain influence on the specific surface area of the carbon nanotube aerogel, but the materials obtained within the range of the heat treatment temperature of the tubular furnace defined in the present invention still have a relatively high specific surface area. The density of this carbon nanotube aerogel is 145 mg / cm 3 .

[0093] Figure 10 Figure shows the cyclic test of the carbon nanotube aerogel prepared in Example 3 for the adsorption of pure toluene vapor at 25 °C; it can be seen from Figure 10 that the adsorption amount of the carbon nanotube aerogel for toluene vapor can still reach 1116 mg / g after 6 cycles. It shows that the carbon nanotube aerogel obtained by heat treatment at 1000 °C exhibits good durability in repeated adsorption - desorption cycles.

[0094] Example 4

[0095] The difference between this example and Example 1 is that: in step (1), di - tert - butyl dicarbonate is 20 mmol. Other conditions are the same as those in Example 1.

[0096] Example 5

[0097] The difference between this example and Example 1 is that: in step (1), di - tert - butyl dicarbonate is 60 mmol. Other conditions are the same as those in Example 1.

[0098] Comparative Example 1

[0099] The difference from Example 1 is that: in step (1), 2,5 - diamino benzonitrile is replaced by p - phenylenediamine. Other conditions are the same as those in Example 1.

[0100] Figure 11 Figure shows the X - ray photoelectron spectroscopy spectrum of the carbon nanotube aerogel prepared in Comparative Example 1. It can be seen from Figure 11It can be seen that the prepared carbon nanotube aerogel contains three elements: carbon (C), nitrogen (N), and oxygen (O). The atomic percentage of nitrogen element is 2.9%. This shows that replacing 2,5-diaminobenzonitrile with p-phenylenediamine has a great impact on the nitrogen content of the carbon nanotube aerogel.

[0101] Figure 12 is the nitrogen adsorption-desorption isotherm of the carbon nanotube aerogel prepared in Comparative Example 1; from Figure 12 it can be seen that the specific surface area of the carbon nanotube aerogel is about 340 m 2 g -1 . This shows that replacing 2,5-diaminobenzonitrile with p-phenylenediamine has a great impact on the specific surface area of the carbon nanotube aerogel.

[0102] Figure 13 is the adsorption-desorption curve of the carbon nanotube aerogel prepared in Comparative Example 1 for pure toluene vapor at 25 °C (the solid curve represents adsorption, and the hollow curve represents desorption). From Figure 13 it can be seen that when the relative pressure is close to 1, the adsorption capacity is 480 mg / g. This shows that replacing 2,5-diaminobenzonitrile with p-phenylenediamine has a great impact on the adsorption amount of toluene vapor by the carbon nanotube aerogel.

[0103] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for preparing a carbon nanowire aerogel material, characterized in that: The following steps are involved: Adding 2,5-diaminobenzonitrile and di-tert-butyl dicarbonate into an organic solvent, stirring for reaction, separating and purifying, and obtaining a COF precursor; The method comprises the following steps: subjecting 2,4,6-trihydroxy-1,3,5-benzenetricarboxaldehyde, the COF precursor and trifluoroacetic acid to a solvothermal reaction in a mixed solvent; and then subjecting the mixture to solvent replacement, freeze drying and heat treatment to obtain a carbon nanowire aerogel material. The molar ratio of the 2,5-diaminobenzonitrile to di-tert-butyl dicarbonate is 1:2 to 1:8; The molar ratio of the 2,4,6-trihydroxy-1,3,5-benzenetricarboxaldehyde to the COF precursor is 2:3; The conditions of the solvothermal reaction are: conducting the solvothermal reaction at 110-180° C. for 24-72 hours; The specific operation of the solvent replacement is: replacing the product after the solvent thermal reaction with tetrahydrofuran and tert-butyl alcohol in sequence; The heat treatment conditions are: heat treatment at 600-1000° C. for 1-3 hours.

2. The method for preparing a carbon nanowire aerogel material according to claim 1, characterized in that: The organic solvent is tetrahydrofuran, ethyl acetate or acetone.

3. The method for preparing a carbon nanowire aerogel material according to claim 1, characterized in that: The mixed solvent is a mixture of dioxane and water, and the volume ratio of the two is 8:1-4:

1.

4. A carbon nanowire aerogel material, characterized in that: The invention is prepared by the preparation method according to any one of claims 1 to 3.

5. The carbon nanowire aerogel material according to claim 4, characterized in that: The specific surface area of ​​the carbon nanowire aerogel material is 910-1032 m 2 g -1 ; pore volume is 1.1-1.3 cm 3 / g; density is 145-165 mg / cm 3 .

6. Application of the carbon nanowire aerogel material as claimed in claim 4 or 5 in the field of toluene vapor adsorption and supercapacitors.

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