Plasma modified UiO-66-NH2 / activated carbon composite filter material as well as preparation method and application thereof

Abstract

The invention relates to the technical field of gas adsorption materials, in particular to a plasma modified UiO-66-NH2 / activated carbon composite filter material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding activated carbon into a UiO-66-NH2 precursor solution, vacuumizing in a vacuum drying oven for 1-3 hours, then transferring into a reaction kettle, heating to 80-120 DEG C, reacting for 20-25 hours, cooling to room temperature, washing and drying to obtain a UiO-66-NH2 / activated carbon composite material; and placing the UiO-66-NH2 / activated carbon composite material in a plasma reactor, and carrying out plasma treatment by taking H2 / Ar as a working gas to obtain the plasma-modified UiO-66-NH2 / activated carbon composite material. According to the invention, UiO-66-NH2 is loaded in the activated carbon, so that the effects of increasing the specific surface area of the activated carbon and developing a microporous structure are achieved, the adsorption capacity of low-concentration trichloro ethylene reaches 281 mg / g, and the UiO-66-NH2 loaded activated carbon is a filter material for effectively adsorbing trichloro ethylene (TCE).

Description

Technical Field

[0001] This invention relates to the field of gas adsorption materials technology, and in particular to plasma-modified UiO-66-NH2 / activated carbon composite filter materials, their preparation methods and applications. Background Technology

[0002] Chlorinated volatile organic compounds (CVOCs) are organic compounds released from chlorinated alkanes during chemical transportation and production. Chlorinated alkanes are important organic solvents, refrigerants, fire extinguishing agents, foaming agents, and chemical raw materials, used in industrial production and the production of pesticides and pharmaceuticals. Common chlorinated alkanes include dichloromethane, trichloroethylene, tetrachloroethylene, dichloroethane, and trichloroethane. Because the chlorine group is a highly toxic group, CVOCs are often more toxic than their parent hydrocarbons, and they are difficult to degrade, have long degradation cycles, and easily accumulate in organisms, causing various health hazards, including cancer, cardiovascular disease, and other potential health risks. Furthermore, CVOCs can directly or indirectly contribute to photochemical pollution and ozone layer depletion. Therefore, measures to reduce VOC emissions are receiving increasing attention and importance from society.

[0003] CVOCs can be classified into saturated and unsaturated chlorinated alkanes based on their structure. Trichloroethylene (TCE) and dichloromethane are typical examples of CVOCs that require control. Both are widely used in the cleaning industry, such as as cleaning agents for electronic products, surface treatment agents for metals, and detergents for clothing. Therefore, trichloroethylene and dichloromethane are generally considered to be priority pollutants for control. The literature [Journal of Hazardous Materials 405 (2021) 123735] studied how TCE emissions lead to trichloroethylene entering the atmosphere, water, and soil through volatilization, combustion, and wastewater discharge, causing significant environmental pollution and posing certain hazards to humans and their flora and fauna. To avoid the accumulation of trichloroethylene in the atmosphere and the resulting secondary hazards, a combination of source control, process control, and end-of-pipe treatment is generally used to address trichloroethylene emissions. However, due to engineering and economic challenges, end-of-pipe treatment is typically employed. In the development of VOCs treatment, end-of-pipe treatment generally includes recovery and disposal processes. Commonly used recycling processes include adsorption, absorption, condensation, and membrane separation; commonly used destruction processes include combustion, biological, electrochemical, and photocatalytic methods.

[0004] More and more studies have found that trichloroethylene has specific hazards to the environment and human body. The literature [Zhang Xiandong. Engineering Case of Trichloroethylene Waste Gas Treatment [J]. Guangdong Chemical Industry M, 2022, 49(20): 121-123] reported a multi-level porous carbon composite material with high adsorption performance for trichloroethylene. It utilizes the hydrogen bonding of zeolite to VOCs and the π-π bond of Lewis acid and base to VOCs to achieve synergistic and efficient adsorption, and the adsorption capacity for trichloroethylene can reach 221 mg / g. Patent CN11751483A discloses a modified resin for trichloroethylene adsorption. By loading iron or aluminum elements onto the modified resin, the resin has a high specific surface area, rich pore structure and good thermal stability, which has a beneficial effect on the adsorption of trichloroethylene.

[0005] However, existing adsorption materials for trichloroethylene often suffer from low adsorption efficiency and are unable to effectively adsorb low concentrations of trichloroethylene. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide plasma-modified UiO-66-NH2 / activated carbon composite filter material, its preparation method and application, so as to at least solve the problems that existing trichloroethylene adsorption materials often have low adsorption efficiency and cannot effectively adsorb low concentrations of trichloroethylene.

[0007] The following is a summary of this disclosure to provide a basic understanding of some aspects. This summary is not intended to identify key or important elements, nor is it intended to limit the implementation or any aspects of the claims. Furthermore, this summary provides a simplified overview of some aspects that can be described in more detail in other parts of this disclosure.

[0008] The present invention solves the above-mentioned technical problems through the following technical means:

[0009] This application provides a method for preparing plasma-modified UiO-66-NH2 / activated carbon composite filter material, including the following steps:

[0010] Activated carbon was added to the UiO-66-NH2 precursor solution and vacuumed in a vacuum drying oven for 1-3 hours. Then it was transferred to a reaction vessel, heated to 80-120℃ and reacted for 20-25 hours. After cooling to room temperature, it was washed and dried to obtain the UiO-66-NH2 / activated carbon composite material.

[0011] The UiO-66-NH2 / activated carbon composite material was placed in a plasma reactor and subjected to plasma treatment with H2 / Ar as the working gas to obtain the plasma-modified UiO-66-NH2 / activated carbon composite material.

[0012] In conjunction with the first aspect, in some embodiments, the preparation method of the UiO-66-NH2 precursor solution is as follows:

[0013] Weigh out ZrCl4 and NH2-H2BDC and add them to DMF. Stir until completely dissolved to obtain UiO-66-NH2 precursor solution.

[0014] In conjunction with the first aspect, in some embodiments, the molar ratio of ZrCl4, NH2-H2BDC, and DMF is 1:(1~3):(1~3).

[0015] In conjunction with the first aspect, in some embodiments, the mass ratio of the activated carbon to the UiO-66-NH2 precursor solution is (1~5):1.

[0016] In conjunction with the first aspect, in some embodiments, the washing process involves alternating washing with DMF and methanol 2 to 5 times.

[0017] In conjunction with the first aspect, in some embodiments, the drying is performed at 60-70°C for 20-25 hours.

[0018] In conjunction with the first aspect, in some embodiments, the plasma treatment has a discharge frequency of 10~30 kHz, a discharge voltage of 10~30 kV, and a discharge time of 2~10 min.

[0019] In conjunction with the first aspect, in some embodiments, the plasma treatment has a discharge frequency of 20 kHz, a discharge voltage of 20 kV, and a discharge time of 5 min.

[0020] Secondly, embodiments of this application also provide a plasma-modified UiO-66-NH2 / activated carbon composite filter material, which is prepared using the preparation method described in the first aspect above.

[0021] Thirdly, the embodiments of this application also provide the application of the above-mentioned plasma-modified UiO-66-NH2 / activated carbon composite filter material in adsorbent materials containing chlorine volatile organic compounds.

[0022] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0023] In the preparation method of the plasma-modified UiO-66-NH2 / activated carbon composite filter material of the present invention, a UiO-66-NH2 precursor solution is combined with activated carbon to obtain a UiO-66-NH2 / activated carbon composite filter material, which is then subjected to plasma treatment to prepare the plasma-modified UiO-66-NH2 / activated carbon composite filter material. In this invention, UiO-66-NH2 is loaded into activated carbon to increase the microporous structure, and Zr... + The activated carbon exhibits selective adsorption of chloride ions from TCE, and the dechlorination of TCE on the UiO-66-NH2 surface is mainly achieved through hydrogen substitution. Loading UiO-66-NH2 further increases the specific surface area and porosity of the activated carbon. The π-π bonds and hydrogen bonds within the activated carbon exhibit good adsorption properties for TCE gas. Plasma treatment increases the number of hydrophilic functional groups such as carboxyl and hydroxyl groups on the material surface, which also contribute to hydrogen bonding. Electrostatic adsorption and hydrogen bonding work synergistically to fix CVOCs within the three-dimensional network structure of the adsorbent material. Experimental results show that the UiO-66-NH2 / activated carbon composite filter material has an adsorption capacity of 281 mg / g for low concentrations (1 ppm) of trichloroethylene. Attached Figure Description

[0024] Figure 1 This is a graph showing the adsorption capacity of the sample material for trichloroethylene. Detailed Implementation

[0025] Reference will now be made to exemplary embodiments, examples of which are shown in the detailed description, implementation, and examples. It should be understood that other implementations may be utilized, and structural and functional changes may be made. Furthermore, features of various implementations may be combined or modified. Therefore, the following description is presented by way of illustration only and should not in any way limit the various alternatives and modifications that may be made to the illustrated implementations. Numerous specific details in this disclosure provide a comprehensive understanding of the subject matter of this disclosure. It should be understood that aspects of this disclosure may be practiced through other implementations, etc., that do not necessarily include all aspects described herein.

[0026] As used herein, the expressions “example” and “exemplary” are intended to indicate an example or illustration. The expressions “example” and “exemplary” do not indicate a key or preferred aspect or implementation. Unless the context otherwise requires, the expression “or” is intended to be inclusive rather than exclusive.

[0027] In the preparation method of plasma-modified UiO-66-NH2 / activated carbon composite filter material of this application, ZrCl4 and NH2-H2BDC (2-aminoterephthalic acid) are dissolved in DMF (N,N-dimethylformamide) to obtain an amino-loaded UiO-66-NH2 precursor solution, which is then combined with activated carbon to obtain UiO-66-NH2 / activated carbon composite filter material. Subsequently, it is subjected to plasma treatment to prepare plasma-modified UiO-66-NH2 / activated carbon composite filter material.

[0028] Specifically, the preparation method of the plasma-modified UiO-66-NH2 / activated carbon composite filter material of this application includes the following steps:

[0029] (1) Preparation of UiO-66-NH2 precursor solution

[0030] According to the molar ratio of ZrCl4, NH2-H2BDC and DMF being 1:(1~3):(1~3), ZrCl4 and NH2-H2BDC were stirred and dissolved in DMF, and magnetically stirred until completely dissolved to prepare UiO-66-NH2 precursor solution.

[0031] (2) Preparation of UiO-66-NH2 / activated carbon composite material

[0032] The coconut shell activated carbon was placed in the precursor solution at a mass ratio of (1~5):1, and vacuumed in a vacuum drying oven for 1~3 hours. Then it was transferred to a reaction vessel and heated in a muffle furnace to 80℃~120℃ for 20~25 hours. After natural cooling to room temperature, it was washed 2~5 times with DMF and methanol alternately until no precursor was found. The composite material was then dried at 60~70℃ for 20~25 hours to obtain the UiO-66-NH2 / activated carbon composite material.

[0033] (3) Plasma treatment

[0034] The UiO-66-NH2 / activated carbon composite material was placed in a plasma reactor with H2 / Ar as the working gas. Under the conditions of discharge frequency of 10~30 kHz, discharge voltage of 10~30kV and discharge time of 2~10 min, the UiO-66-NH2 / activated carbon composite material was subjected to plasma treatment to obtain plasma-modified UiO-66-NH2 / activated carbon composite material.

[0035] To better understand the above technical solution, the following will provide a detailed explanation of the technical solution in conjunction with specific implementation methods.

[0036] Example 1

[0037] The preparation method of the plasma-modified UiO-66-NH2 / activated carbon composite filter material in this embodiment includes the following steps:

[0038] (1) Preparation of UiO-66-NH2 precursor solution

[0039] According to the molar ratio of ZrCl4, NH2-H2BDC, and DMF of 1:1:1, 1.286g of ZrCl4, 1g of NH2-H2BDC, and 0.403g of DMF were weighed out respectively. ZrCl4 and NH2-H2BDC were dissolved in DMF by stirring and magnetic stirring until completely dissolved to prepare UiO-66-NH2 precursor solution.

[0040] (2) Preparation of UiO-66-NH2 / activated carbon composite material

[0041] With a mass ratio of activated carbon to UiO-66-NH2 precursor solution of 1:1, 10g of coconut shell activated carbon was placed into 10g of precursor solution and vacuumed in a vacuum drying oven for 1h. Then, it was transferred to a reaction vessel and heated to 100℃ in a muffle furnace for 24h. After naturally cooling to room temperature, it was washed three times with DMF and methanol alternately until no precursor was found. The composite material was then dried at 65℃ for 24h to obtain the UiO-66-NH2 / activated carbon composite material.

[0042] (3) Plasma treatment

[0043] The UiO-66-NH2 / activated carbon composite material was placed in a plasma reactor with H2 / Ar as the working gas. Under the conditions of a discharge frequency of 20 kHz, a discharge voltage of 20 kV, and a discharge time of 5 min, the UiO-66-NH2 / activated carbon composite material was subjected to plasma treatment to obtain plasma-modified UiO-66-NH2 / activated carbon composite material, hereinafter referred to as UiO-C(1:1).

[0044] Example 2

[0045] The preparation method of the plasma-modified UiO-66-NH2 / activated carbon composite filter material in this embodiment includes the following steps:

[0046] (1) Preparation of UiO-66-NH2 precursor solution

[0047] According to the molar ratio of ZrCl4, NH2-H2BDC, and DMF of 1:2:2, 1.286g of ZrCl4, 2g of NH2-H2BDC, and 0.806g of DMF were weighed out respectively. ZrCl4 and NH2-H2BDC were dissolved in DMF by stirring and magnetic stirring until completely dissolved to prepare UiO-66-NH2 precursor solution.

[0048] (2) Preparation of UiO-66-NH2 / activated carbon composite material

[0049] With a mass ratio of activated carbon to UiO-66-NH2 precursor solution of 3:1, 30g of coconut shell activated carbon was placed into 10g of precursor solution and vacuumed in a vacuum drying oven for 2h. Then, it was transferred to a reaction vessel and heated to 100℃ in a muffle furnace for 24h. After naturally cooling to room temperature, it was washed three times with DMF and methanol alternately until no precursor was found. The composite material was then dried at 65℃ for 24h to obtain the UiO-66-NH2 / activated carbon composite material.

[0050] (3) Plasma treatment

[0051] The UiO-66-NH2 / activated carbon composite material was placed in a plasma reactor with H2 / Ar as the working gas. Under the conditions of a discharge frequency of 20 kHz, a discharge voltage of 20 kV, and a discharge time of 5 min, the UiO-66-NH2 / activated carbon composite material was subjected to plasma treatment to obtain plasma-modified UiO-66-NH2 / activated carbon composite material, hereinafter referred to as UiO-C(3:1).

[0052] Example 3

[0053] The preparation method of the plasma-modified UiO-66-NH2 / activated carbon composite filter material in this embodiment includes the following steps:

[0054] (1) Preparation of UiO-66-NH2 precursor solution

[0055] According to the molar ratio of ZrCl4, NH2-H2BDC, and DMF of 1:3:3, 1.286g of ZrCl4, 3g of NH2-H2BDC, and 1.212g of DMF were weighed out respectively. ZrCl4 and NH2-H2BDC were dissolved in DMF by stirring and magnetic stirring until completely dissolved to prepare UiO-66-NH2 precursor solution.

[0056] (2) Preparation of UiO-66-NH2 / activated carbon composite material

[0057] With a mass ratio of activated carbon to UiO-66-NH2 precursor solution of 5:1, 50g of coconut shell activated carbon was placed into 10g of precursor solution and vacuumed in a vacuum drying oven for 1h. Then, it was transferred to a reaction vessel and heated to 100℃ in a muffle furnace for 24h. After naturally cooling to room temperature, it was washed three times with DMF and methanol alternately until no precursor was found. The composite material was then dried at 65℃ for 24h to obtain the UiO-66-NH2 / activated carbon composite material.

[0058] (3) Plasma treatment

[0059] The UiO-66-NH2 / activated carbon composite material was placed in a plasma reactor with H2 / Ar as the working gas. Under the conditions of a discharge frequency of 20 kHz, a discharge voltage of 20 kV, and a discharge time of 5 min, the UiO-66-NH2 / activated carbon composite material was subjected to plasma treatment to obtain plasma-modified UiO-66-NH2 / activated carbon composite material, hereinafter referred to as UiO-C(5:1).

[0060] Example 4

[0061] The preparation method of the plasma-modified UiO-66-NH2 / activated carbon composite filter material in this embodiment includes the following steps:

[0062] (1) Preparation of UiO-66-NH2 precursor solution

[0063] According to the molar ratio of ZrCl4, NH2-H2BDC, and DMF of 1:2:2, 1.286g of ZrCl4, 2g of NH2-H2BDC, and 0.806g of DMF were weighed out respectively. ZrCl4 and NH2-H2BDC were dissolved in DMF by stirring and magnetic stirring until completely dissolved to prepare UiO-66-NH2 precursor solution.

[0064] (2) Preparation of UiO-66-NH2 / activated carbon composite material

[0065] With a mass ratio of activated carbon to UiO-66-NH2 precursor solution of 3:1, 30g of coconut shell activated carbon was placed into 10g of precursor solution and vacuumed in a vacuum drying oven for 3h. Then, it was transferred to a reaction vessel and heated to 80℃ in a muffle furnace for 25h. After naturally cooling to room temperature, it was washed twice with DMF and methanol alternately until no precursor was found. The composite material was then dried at 60℃ for 25h to obtain the UiO-66-NH2 / activated carbon composite material.

[0066] (3) Plasma treatment

[0067] The UiO-66-NH2 / activated carbon composite material was placed in a plasma reactor with H2 / Ar as the working gas. Under the conditions of a discharge frequency of 10 kHz, a discharge voltage of 10 kV, and a discharge time of 2 min, the UiO-66-NH2 / activated carbon composite material was subjected to plasma treatment to obtain plasma-modified UiO-66-NH2 / activated carbon composite material.

[0068] Example 5

[0069] The preparation method of the plasma-modified UiO-66-NH2 / activated carbon composite filter material in this embodiment includes the following steps:

[0070] (1) Preparation of UiO-66-NH2 precursor solution

[0071] According to the molar ratio of ZrCl4, NH2-H2BDC, and DMF of 1:2:2, 1.286g of ZrCl4, 2g of NH2-H2BDC, and 0.806g of DMF were weighed out respectively. ZrCl4 and NH2-H2BDC were dissolved in DMF by stirring and magnetic stirring until completely dissolved to prepare UiO-66-NH2 precursor solution.

[0072] (2) Preparation of UiO-66-NH2 / activated carbon composite material

[0073] With a mass ratio of activated carbon to UiO-66-NH2 precursor solution of 3:1, 30g of coconut shell activated carbon was placed into 10g of precursor solution and vacuumed in a vacuum drying oven for 2h. Then, it was transferred to a reaction vessel and heated to 120℃ in a muffle furnace for 20h. After natural cooling to room temperature, it was washed 5 times alternately with DMF and methanol until no precursor was found. The composite material was then dried at 70℃ for 20h to obtain the UiO-66-NH2 / activated carbon composite material.

[0074] (3) Plasma treatment

[0075] The UiO-66-NH2 / activated carbon composite material was placed in a plasma reactor with H2 / Ar as the working gas. Under the conditions of a discharge frequency of 30kHz, a discharge voltage of 30kV, and a discharge time of 10min, the UiO-66-NH2 / activated carbon composite material was subjected to plasma treatment to obtain plasma-modified UiO-66-NH2 / activated carbon composite material.

[0076] Performance testing was conducted using the plasma-modified UiO-66-NH2 / activated carbon composite filter materials prepared in Examples 1, 2, and 3, as well as ordinary coconut shell activated carbon, as samples. The results are as follows:

[0077] (1) Characterization of pore structure

[0078] The pore structure of the sample was tested using a Biod SSA-6000 pore size and specific surface area analyzer. The test results are shown in Table 1.

[0079]

[0080] Table 1

[0081] Table 1 shows that the specific surface area, total pore volume, and micropore ratio of activated carbon loaded with UiO-66-NH2 are significantly improved. Specifically, the specific surface area of ​​UiO-C (3:1) is 48.86% higher than that of coconut shell activated carbon. This is because the impregnation and participation of UiO-66-NH2 in the carbonization and activation process generates a large amount of gas (NH3, CO2, water vapor, etc.) during carbonization and activation, increasing the number of pores and the specific surface area of ​​the adsorbent. Furthermore, Zr can promote the formation and development of pores on the activated carbon surface, further increasing the specific surface area and the number of micropores. However, byproducts generated during the dissolution of excessive UiO-66-NH2 react with the coconut shell carbon, damaging its pore structure and hindering the adsorption process. Therefore, modifying a large proportion of UiO-66-NH2 with coconut shell actually yields poor results.

[0082] (2) Determination of TCE adsorption performance

[0083] The plasma-treated UiO-66-NH2 / activated carbon composite filter material was tested using a domestically produced AMC chemical filter material testing station. The testing method followed the national standard ISO10121-1. The gas flow rate Q was set to 16 m³ / s. 3 / h, face wind speed V f The parameters were: velocity 2.3 m / s, material thickness 3.8 cm (50 mL graduated cylinder), material radius 25 cm, tested gas TCE gas, tested gas concentration 1 ppm (initial efficiency), temperature 25℃, relative humidity 50%, and the termination efficiency of the dirt holding capacity test was 70%. The test results are shown in Table 2 and... Figure 1 .

[0084]

[0085] Table 2

[0086] The data in Table 2 show that the initial efficiency of UiO-C composite filter material (UiO-C) treated with plasma for TCE is higher than that of coconut shell activated carbon alone. This indicates that loading UiO-66-NH2 onto coconut shell activated carbon enhances the removal of TCE. The optimal ratio is 3:1 (mass ratio of coconut shell activated carbon to UiO-66-NH2), which achieves an adsorption capacity of 281 mg / g for low-concentration TCE.

[0087] Figure 1 Data shows that plasma-treated UiO-66-NH2 / activated carbon composite filter materials with different coconut shell activated carbon and UiO-66-NH2 impregnation ratios exhibit better adsorption capacity and adsorption rate for TCE. This may be because excessive NH2 impregnation generates a large amount of gas and its byproducts, which damages the original pore structure and reduces the porosity. Therefore, UiO-C (3:1) has the best adsorption effect.

[0088] Therefore, the plasma-modified UiO-66-NH2 / activated carbon composite filter material prepared by this invention can be used as an adsorbent for the adsorption and treatment of chlorine-containing volatile organic compounds, especially suitable for the adsorption and treatment of trichloroethane gas, and even more suitable for the adsorption and treatment of low concentration (1ppm) trichloroethane gas.

[0089] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention. Technical aspects, shapes, and structures not described in detail in this invention are all well-known technologies.

Claims

1. A method for preparing plasma-modified UiO-66-NH2 / activated carbon composite filter material, characterized in that, Includes the following steps: Activated carbon was added to the UiO-66-NH2 precursor solution and vacuumed in a vacuum drying oven for 1-3 hours. Then it was transferred to a reaction vessel, heated to 80-120℃ and reacted for 20-25 hours. After cooling to room temperature, it was washed and dried to obtain the UiO-66-NH2 / activated carbon composite material. The UiO-66-NH2 / activated carbon composite material was placed in a plasma reactor and subjected to plasma treatment with H2 / Ar as the working gas to obtain the plasma-modified UiO-66-NH2 / activated carbon composite material.

2. The preparation method of plasma-modified UiO-66-NH2 / activated carbon composite filter material according to claim 1, wherein, The preparation method of the UiO-66-NH2 precursor solution is as follows: Weigh out ZrCl4 and NH2-H2BDC and add them to DMF. Stir until completely dissolved to obtain UiO-66-NH2 precursor solution.

3. The preparation method of plasma-modified UiO-66-NH2 / activated carbon composite filter material according to claim 2, wherein, The molar ratio of ZrCl4, NH2-H2BDC, and DMF is 1:(1~3):(1~3).

4. The preparation method of plasma-modified UiO-66-NH2 / activated carbon composite filter material according to claim 3, wherein, The mass ratio of activated carbon to UiO-66-NH2 precursor solution is (1~5):

1.

5. The preparation method of plasma-modified UiO-66-NH2 / activated carbon composite filter material according to claim 1, wherein, The washing process involves alternating between DMF and methanol for 2 to 5 washes.

6. The preparation method of plasma-modified UiO-66-NH2 / activated carbon composite filter material according to claim 1, wherein, The drying process involves drying at 60-70°C for 20-25 hours.

7. The preparation method of plasma-modified UiO-66-NH2 / activated carbon composite filter material according to claim 1, wherein, The plasma treatment has a discharge frequency of 10~30 kHz, a discharge voltage of 10~30 kV, and a discharge time of 2~10 min.

8. The preparation method of plasma-modified UiO-66-NH2 / activated carbon composite filter material according to claim 7, wherein, The plasma treatment has a discharge frequency of 20 kHz, a discharge voltage of 20 kV, and a discharge time of 5 min.

9. A plasma-modified UiO-66-NH2 / activated carbon composite filter material, characterized in that, It is prepared by the preparation method described in any one of claims 1-8.

10. The application of the plasma-modified UiO-66-NH2 / activated carbon composite filter material according to claim 9 in the adsorption material for chlorine-containing volatile organic compounds.

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