Air conditioner, zn-mofs material and preparation method and application thereof

Abstract

The application provides an air conditioner, a Zn-MOFs material and a preparation method and application thereof. The stoichiometric formula of the Zn-MOFs material is {Zn2(L)3(DMF)} n , L is deprotonated 2-(1-methyltetrazole)-4,5-imidazole dicarboxylic acid, DMF is a configuration solution of anhydrous methanol and N,N-dimethylformamide, and n is a positive integer. The preparation method of the Zn-MOFs material comprises the following steps: dissolving zinc nitrate hexahydrate and 2-(1-methyltetrazole)-4,5-imidazole dicarboxylic acid with a molar-mass ratio of 1 mol:500 g in anhydrous methanol to obtain solution 1; dissolving N,N-dimethylformamide in anhydrous methanol with a molar ratio of 10:1 to obtain solution 2; mixing solution 1 and solution 2, and stirring to obtain a precipitate; and drying the precipitate to obtain the Zn-MOFs material. The Zn-MOFs material can effectively adsorb radon.

Description

Technical Field

[0001] This application belongs to the field of adsorption materials technology, and particularly relates to an air conditioner, Zn-MOFs material, its preparation method and application. Background Technology

[0002] In recent years, people have paid increasing attention to indoor air pollution. Radon is a colorless and odorless gas that is harmful to the human body. Inhaling radon can cause radiation damage and lead to lung cancer. Building materials such as fly ash bricks, slag bricks, and coal shale bricks are the main sources of radon and radioactive pollution in residences, especially in newly renovated furniture environments, where decoration materials and paints can emit radon.

[0003] Radon in the air exists in several forms: ① bound radon progeny; ② condensed nucleus radon progeny, aerosol particles with a diameter of 0.001-0.1 μm; ③ particulate radon progeny, bound aerosol particles with a diameter greater than 0.1 μm. Existing common radon removal technology involves activated carbon mesh adsorption, but for the average diameter of radon progeny, activated carbon mesh can only adsorb down to a minimum of 10 μm, which is insufficient for effective radon adsorption. Therefore, there is an urgent need to provide a material that can effectively adsorb radon to solve this problem. Summary of the Invention

[0004] This application provides an air conditioner, a Zn-MOFs material, a preparation method thereof, and its application, in order to solve the problem of poor adsorption effect of radon gas in the prior art.

[0005] In a first aspect, embodiments of this application provide a Zn-MOFs material, wherein the stoichiometric formula of the Zn-MOFs material is {Zn2(L)3(DMF)}. n Where L is deprotonated 2-(1-methyltetrazolium)-4,5-imidazolium dimethylcarboxylate, DMF is a solution of anhydrous methanol and N,N-dimethylformamide, and n is a positive integer.

[0006] Secondly, this application also provides a method for preparing Zn-MOFs material, the method comprising the following steps: (1) dissolving zinc nitrate hexahydrate and 2-(1-methyltetrazole)-4,5-imidazolium dimethylcarboxylate in anhydrous methanol to obtain solution 1, wherein the molar to mass ratio of zinc nitrate hexahydrate to 2-(1-methyltetrazole)-4,5-imidazolium dimethylcarboxylate is 1 mol: 500 g; (2) dissolving N,N-dimethylformamide in anhydrous methanol to obtain solution 2, wherein the molar ratio of N,N-dimethylformamide to zinc nitrate hexahydrate is 10:1; (3) mixing solution 1 and solution 2 and reacting by stirring to obtain a precipitate; (4) drying the precipitate to obtain Zn-MOFs material.

[0007] Optionally, in step (1), the molar and volume ratio of zinc nitrate hexahydrate to anhydrous methanol is 1 mol: 1 L.

[0008] Optionally, in step (2), the molar and volume ratio of N,N-dimethylformamide to anhydrous methanol is 1 mol: 100 mL.

[0009] Optionally, in step (3), the temperature of the stirring reaction after mixing solution 1 and solution 2 is 26℃~30℃, the stirring speed is 140r / min~145r / min, and the stirring duration is 1h~1.25h.

[0010] Optionally, step (3) includes: mixing the solution 1 and the solution 2 and stirring to react, then settling to obtain the precipitate for a settling time of 25 min to 30 min.

[0011] Optionally, before drying the precipitate, the precipitate is washed 3 to 5 times with a mixed solvent of methanol and water.

[0012] Optionally, the volume ratio of methanol to water in the mixed solvent is 1:1.

[0013] Optionally, the temperature for drying the precipitate is 60℃~66℃, and the drying time is 12h~15h.

[0014] Thirdly, embodiments of this application also provide the application of the Zn-MOFs material as described above or the Zn-MOFs material prepared by the preparation method as described above in the adsorption of radon gas.

[0015] Fourthly, this application embodiment also provides an air conditioner, which includes an air conditioner body and a filter screen. The air conditioner body has an air inlet, and the filter screen is sealed at the air inlet. The filter screen is made of Zn-MOFs material as described above or Zn-MOFs material prepared by the preparation method described above.

[0016] The Zn-MOFs material provided in this application has a zeolite topology. The Zn-MOFs material with the zeolite topology has multi-channel and modifiability, and has a large specific surface area, which can increase the contact area between radon gas and Zn-MOFs material, and achieve effective adsorption of radon gas in the air.

[0017] The method for preparing Zn-MOFs materials provided in this application involves using zinc nitrate hexahydrate, 2-(1-methyltetrazazole)-4,5-imidazolium dimethylcarboxylate, N,N-dimethylformamide, and anhydrous methanol as raw materials to carry out a synthesis reaction. This allows a highly coordinating chelate ligand to coordinate with the corresponding zinc ions, thereby forming a Zn-MOFs material with smaller crystals and a more complete reaction. This increases the specific surface area of ​​the Zn-MOFs material, thereby improving its radon adsorption capacity. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0020] Figure 1 This is a schematic diagram of the structure of the Zn-MOFs material provided in the embodiments of this application.

[0021] Figure 2 A flowchart illustrating the preparation method of Zn-MOFs materials provided in this application embodiment.

[0022] Figure 3 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this application.

[0023] Figure 4 The image shows the XRD diffraction pattern of the Zn-MOFs material prepared in Example 1 of this application.

[0024] Figure 5 This is a diagram showing the radon adsorption effect of the Zn-MOFs material prepared in Example 1 of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] This application provides a Zn-MOFs material, the stoichiometric formula of which is {Zn2(L)3(DMF)}. nWhere L is deprotonated 2-(1-methyltetrazolium)-4,5-imidazolium dimethylcarboxylate, DMF is a solution of anhydrous methanol and N,N-dimethylformamide, and n is a positive integer.

[0027] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the Zn-MOFs material provided in the embodiments of this application. The Zn-MOFs material provided in the embodiments of this application has a zeolite topology, and the Zn-MOFs material with the zeolite topology has multi-channel properties (see reference). Figure 1 The Zn-MOFs material, with its adsorption channels (indicated by the standard) and modifiability, has a large specific surface area, which can increase the contact area between radon gas and Zn-MOFs material, thus achieving effective adsorption of radon gas in the air. It has broad application prospects in the field of radon adsorption.

[0028] This application also provides a method for preparing Zn-MOFs materials, and the Zn-MOFs materials provided in this application can be obtained by this preparation method.

[0029] like Figure 2 As shown, the Zn-MOFs material preparation method provided in this application includes the following steps:

[0030] (1) Dissolve zinc nitrate hexahydrate and 2-(1-methyltetrazole)-4,5-imidazolium dimethylcarboxylate in anhydrous methanol to obtain solution 1, wherein the molar and mass ratio of zinc nitrate hexahydrate to 2-(1-methyltetrazole)-4,5-imidazolium dimethylcarboxylate is 1 mol: 500 g.

[0031] (2) Dissolve N,N-dimethylformamide in anhydrous methanol to obtain solution 2, wherein the molar ratio of N,N-dimethylformamide to zinc nitrate hexahydrate is 10:1;

[0032] (3) Mix solution 1 and solution 2, and react with stirring to obtain a precipitate;

[0033] (4) The precipitate is dried to obtain Zn-MOFs material.

[0034] The order of steps (1) and (2) is not limited. Step (1) can be performed first, followed by step (2); or step (2) can be performed first, followed by step (1); or steps (1) and (2) can be performed simultaneously.

[0035] The method for preparing Zn-MOFs materials provided in this application involves using zinc nitrate hexahydrate, 2-(1-methyltetrazazole)-4,5-imidazolium dimethylcarboxylate, N,N-dimethylformamide, and anhydrous methanol as raw materials to carry out a synthesis reaction. This allows a highly coordinating chelate ligand to coordinate with the corresponding zinc ions, thereby forming a Zn-MOFs material with smaller crystals and a more complete reaction. This increases the specific surface area of ​​the Zn-MOFs material, thereby improving its radon adsorption capacity.

[0036] Optionally, in step (1), the molar and volume ratio of zinc nitrate hexahydrate to anhydrous methanol is 1 mol: 1 L, and the specific amount used can be set according to actual needs. Optionally, in step (2), the molar and volume ratio of N,N-dimethylformamide to anhydrous methanol is 1 mol: 100 mL, and the specific amount used can be set according to actual needs.

[0037] Optionally, in step (3), the temperature of the stirring reaction after mixing solution 1 and solution 2 is 26℃~30℃, the stirring speed is 140r / min~145r / min, and the stirring duration is 1h~1.25h. By controlling the stirring reaction temperature to 26℃~30℃, the reaction between solution 1 and solution 2 is more complete, resulting in a better quality Zn-MOFs material. For example, after mixing solution 1 and solution 2, a magnetic stirrer can be used to stir at a temperature of 26℃, 27℃, 28℃, 29℃, or 30℃ to ensure the reaction proceeds normally. The specific temperature value can be selected according to actual needs. The stirring speed and duration during the reaction can be selected according to actual needs. For example, the stirring speed can be 140 r / min, 141 r / min, 142 r / min, 143 r / min, 144 r / min, or 145 r / min, and the stirring duration can be 1 h, 1.05 h, 1.1 h, 1.15 h, 1.2 h, or 1.25 h. The drying temperature and drying time can be selected according to actual needs. It is understood that a higher stirring speed will result in a shorter stirring duration, and a lower stirring speed will result in a longer stirring duration.

[0038] Optionally, step (3) includes: mixing solution 1 and solution 2 and stirring to react, followed by sedimentation to obtain the precipitate, with a sedimentation time of 25 min to 30 min. That is, after mixing and stirring solution 1 and solution 2, a sedimentation period is required to obtain the precipitate, which can be 25 min to 30 min. Sedimentation ensures more complete collection of the precipitate, avoiding reduced yield due to insufficient sedimentation. For example, the sedimentation time can be 25 min, 26 min, 27 min, 28 min, 29 min, or 30 min, and the specific sedimentation time can be selected according to actual needs.

[0039] Optionally, in step (4), before drying the precipitate, the precipitate can be washed 3 to 5 times with a mixed solvent of methanol and water to obtain a Zn-MOFs product with higher purity. That is, after obtaining the precipitate, the precipitate can be washed 3 to 5 times with a mixed solvent of methanol and water, and then the washed precipitate can be dried to obtain Zn-MOFs material. For example, the precipitate can be washed 3, 4, or 5 times with a mixed solvent of methanol and water, and the number of washing times can be selected according to actual needs. The volume ratio of methanol to water in the mixed solvent is 1:1, and the specific amount used can be set according to actual needs.

[0040] Optionally, in step (4), the temperature for drying the precipitate is 60℃~66℃, and the drying time is 12h~15h. For example, the temperature for drying the precipitate can be 60℃, 61℃, 62℃, 63℃, 64℃, 65℃, or 66℃, and the drying time can be 12h, 13h, 14h, or 15h. The specific temperature and time can be selected according to actual needs. It is understood that if a higher drying temperature is selected, the drying time can be shortened accordingly; if a lower drying temperature is selected, the drying time can be increased accordingly.

[0041] This application also provides an application of the Zn-MOFs material as described above in radon adsorption. By using the Zn-MOFs material provided in this application for radon adsorption, a good radon adsorption effect can be achieved.

[0042] For example, the Zn-MOFs material provided in the embodiments of this application or the Zn-MOFs material prepared by the preparation method provided in the embodiments of this application can be applied in air conditioners to adsorb radon gas generated in the home decoration environment. Specifically, a filter made of Zn-MOFs material provided in the embodiments of this application is placed over the air inlet 101 of the air conditioner.

[0043] This application also provides an air conditioner, such as... Figure 3 As shown, the air conditioner includes an air conditioner body 110 and a filter 120. An air inlet 101 is provided on the air conditioner body 110, and the filter 120 covers the air inlet 101. The filter 120 is made of Zn-MOFs material provided in this application embodiment or Zn-MOFs material prepared by the above-mentioned preparation method provided in this application embodiment. The air conditioner provided in this application embodiment adsorbs radon gas in the incoming air through the filter 120, thereby improving indoor air quality and enhancing people's quality of life. Preferably, the filter 120 has a thickness of 5mm and a pore size of 50µm to 500µm. This ensures both the air permeability of the filter 120 and the contact area between the air and the Zn-MOFs material, achieving effective adsorption of radon gas and a good radon adsorption effect.

[0044] The present application will be described in detail below through specific embodiments. The following embodiments are only some embodiments of the present application and are not intended to limit the present application.

[0045] Example 1

[0046] A method for preparing Zn-MOFs materials includes the following steps:

[0047] 2.97 g (0.01 mol) of zinc nitrate hexahydrate and 5 g of 2-(1-methyltetrazolium)-4,5-imidazolium dimethylcarboxylate were dissolved in 10 ml of anhydrous methanol to obtain solution 1;

[0048] Dissolve 7.3095 g (0.1 mol) of N,N-dimethylformamide in 10 ml of anhydrous methanol to obtain solution 2;

[0049] Solution 1 and solution 2 were mixed and reacted under the stirring of a magnetic stirrer. After the reaction was completed, the precipitate was obtained by sedimentation. The stirring reaction temperature was 28℃, the magnetic stirrer speed was 142r / min, the stirring duration was 1h, and the sedimentation time was 25min.

[0050] The precipitate was washed three times with a mixed solvent of methanol and water, and then dried to obtain Zn-MOFs material. The volume ratio of methanol to water in the mixed solvent was 1:1, the drying temperature was 65°C, and the drying time was 13 hours.

[0051] Example 2

[0052] A method for preparing Zn-MOFs materials includes the following steps:

[0053] 2.97 g (0.01 mol) of zinc nitrate hexahydrate and 5 g of 2-(1-methyltetrazolium)-4,5-imidazolium dimethylcarboxylate were dissolved in 10 ml of anhydrous methanol to obtain solution 1;

[0054] Dissolve 7.3095 g (0.1 mol) of N,N-dimethylformamide in 10 ml of anhydrous methanol to obtain solution 2;

[0055] Solution 1 and solution 2 were mixed and reacted under the stirring of a magnetic stirrer. After the reaction was completed, the precipitate was obtained by sedimentation. The stirring reaction temperature was 30℃, the magnetic stirrer speed was 140r / min, the stirring duration was 1.1h, and the sedimentation time was 25min.

[0056] The precipitate was washed three times with a mixed solvent of methanol and water, and then dried to obtain Zn-MOFs material. The volume ratio of methanol to water in the mixed solvent was 1:1, the drying temperature was 66°C, and the drying time was 12 hours.

[0057] Example 3

[0058] A method for preparing Zn-MOFs materials includes the following steps:

[0059] 2.97 g (0.01 mol) of zinc nitrate hexahydrate and 5 g of 2-(1-methyltetrazolium)-4,5-imidazolium dimethylcarboxylate were dissolved in 10 ml of anhydrous methanol to obtain solution 1;

[0060] Dissolve 7.3095 g (0.1 mol) of N,N-dimethylformamide in 10 ml of anhydrous methanol to obtain solution 2;

[0061] Solution 1 and solution 2 were mixed and reacted under the stirring of a magnetic stirrer. After the reaction was completed, the precipitate was obtained by sedimentation. The stirring reaction temperature was 26℃, the magnetic stirrer speed was 145r / min, the stirring duration was 1h, and the sedimentation time was 30min.

[0062] The precipitate was washed three times with a mixed solvent of methanol and water, and then dried to obtain Zn-MOFs material. The volume ratio of methanol to water in the mixed solvent was 1:1, the drying temperature was 60°C, and the drying time was 15 hours.

[0063] Example 4

[0064] A method for preparing Zn-MOFs materials includes the following steps:

[0065] 2.97 g (0.01 mol) of zinc nitrate hexahydrate and 5 g of 2-(1-methyltetrazolium)-4,5-imidazolium dimethylcarboxylate were dissolved in 10 ml of anhydrous methanol to obtain solution 1;

[0066] Dissolve 7.3095 g (0.1 mol) of N,N-dimethylformamide in 10 ml of anhydrous methanol to obtain solution 2;

[0067] Solution 1 and solution 2 were mixed and reacted under the stirring of a magnetic stirrer. After the reaction was completed, the precipitate was obtained by sedimentation. The stirring reaction temperature was 27℃, the magnetic stirrer speed was 143r / min, the stirring duration was 1.05h, and the sedimentation time was 28min.

[0068] The precipitate was washed three times with a mixed solvent of methanol and water, and then dried to obtain Zn-MOFs material. The volume ratio of methanol to water in the mixed solvent was 1:1, the drying temperature was 63°C, and the drying time was 14 hours.

[0069] Example 5

[0070] A method for preparing Zn-MOFs materials includes the following steps:

[0071] 2.97 g (0.01 mol) of zinc nitrate hexahydrate and 5 g of 2-(1-methyltetrazolium)-4,5-imidazolium dimethylcarboxylate were dissolved in 10 ml of anhydrous methanol to obtain solution 1;

[0072] Dissolve 7.3095 g (0.1 mol) of N,N-dimethylformamide in 10 ml of anhydrous methanol to obtain solution 2;

[0073] Solution 1 and solution 2 were mixed and reacted under the stirring of a magnetic stirrer. After the reaction was completed, the precipitate was obtained by sedimentation. The stirring reaction temperature was 28℃, the magnetic stirrer speed was 143r / min, the stirring duration was 1h, and the sedimentation time was 27min.

[0074] The precipitate was washed three times with a mixed solvent of methanol and water, and then dried to obtain Zn-MOFs material. The volume ratio of methanol to water in the mixed solvent was 1:1, the drying temperature was 62°C, and the drying time was 15 hours.

[0075] The Zn-MOFs material prepared in Example 1 was subjected to XRD analysis (i.e., X-ray diffraction analysis) and radon adsorption test.

[0076] Specifically, during XRD analysis, a Rigaku D / max-rB X-ray diffractometer (Japan) was used to test the samples prepared in Example 1 to analyze their composition. Cu-Ka rays were used as the incident light (λ = 0.154178 nm), and data was collected from 2° to 50°. Figure 4 As shown, Figure 4 The image shows the XRD pattern of the sample from Example 1, measured under the conditions described above. Figure 4 The horizontal axis in the graph represents the angle change as the X-ray diffractometer scans the entire diffraction region at an angle of 2θ. Figure 4 The vertical axis represents the intensity of the diffraction peaks at different diffraction angles. Figure 4 As can be seen, Zn-MOFs were successfully prepared in Example 1 with virtually no impurities. The molecular formula (empirical formula) of the Zn-MOFs prepared in Example 1 is C1. 27 H 25 N8O8Zn2.

[0077] Radon adsorption tests were conducted using a BH1227 four-channel low-background αβ analyzer. The specific procedure was as follows: 100 mg of the sample prepared in Example 1 was placed in a standard radon chamber with a concentration of 100,000 Bq for passive adsorption for 12 hours, and then placed in the BH1227 four-channel low-background αβ analyzer for testing. The radon adsorption capacity of the sample was measured under different pressures by applying pressure. The radon adsorption effect diagram plotted based on the test results is shown below. Figure 5 As shown.

[0078] Figure 5 The horizontal axis represents the pressure magnitude, in bar. Figure 5 The vertical axis represents the adsorbed radon content, in mmol / g. Figure 5 It can be seen that the adsorbed radon content increases with increasing pressure. In other words, the radon content per gram of sample increases significantly with increasing pressure, indicating that the Zn-MOFs sample prepared in Example 1 has a good adsorption effect on radon.

[0079] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0080] It should be understood that the description in the form of a range in this application is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of this application; therefore, it should be considered that the range description has specifically disclosed all possible subranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed subranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Furthermore, whenever a numerical range is referred to herein, it means including any referenced number (fraction or integer) within the range referred to.

[0081] The Zn-MOFs materials, their preparation methods, and applications provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A Zn-MOFs material, characterized in that, The stoichiometry of the Zn-MOFs material is {Zn2(L)3(DMF)} n Where L is deprotonated 2-(1-methyltetrazazole)-4,5-imidazolium dimethylcarboxylate, DMF is a solution of anhydrous methanol and N,N-dimethylformamide, and n is a positive integer; The Zn-MOFs material was prepared using the following method: Zinc nitrate hexahydrate and 2-(1-methyltetrazole)-4,5-imidazolium dimethylcarboxylate were dissolved in anhydrous methanol to obtain solution 1, wherein the molar to mass ratio of zinc nitrate hexahydrate to 2-(1-methyltetrazole)-4,5-imidazolium dimethylcarboxylate was 1 mol:500 g, and the molar to volume ratio of zinc nitrate hexahydrate to anhydrous methanol was 1 mol:1 L. N,N-dimethylformamide was dissolved in anhydrous methanol to obtain solution 2, wherein the molar ratio of N,N-dimethylformamide to zinc nitrate hexahydrate was 10:1, and the molar to volume ratio of N,N-dimethylformamide to anhydrous methanol was 1 mol:100 mL. Solutions 1 and 2 were mixed and reacted with stirring to obtain a precipitate at a temperature of 26℃~30℃. The precipitate was dried to obtain Zn-MOFs material.

2. A method for preparing the Zn-MOFs material according to claim 1, characterized in that, The preparation method includes the following steps: (1) Dissolve zinc nitrate hexahydrate and 2-(1-methyltetrazole)-4,5-imidazolium dimethylcarboxylate in anhydrous methanol to obtain solution 1, wherein the molar and mass ratio of zinc nitrate hexahydrate to 2-(1-methyltetrazole)-4,5-imidazolium dimethylcarboxylate is 1 mol: 500 g, and the molar and volume ratio of zinc nitrate hexahydrate to anhydrous methanol is 1 mol: 1 L; (2) Dissolve N,N-dimethylformamide in anhydrous methanol to obtain solution 2. The molar ratio of N,N-dimethylformamide to zinc nitrate hexahydrate is 10:1, and the molar and volume ratio of N,N-dimethylformamide to anhydrous methanol is 1 mol: 100 mL. (3) Mix solution 1 and solution 2, and react with stirring to obtain a precipitate. The temperature of the stirring reaction is 26℃~30℃. (4) The precipitate is dried to obtain Zn-MOFs material.

3. The method for preparing Zn-MOFs material according to claim 2, characterized in that, In step (3), the stirring speed of the mixture of solution 1 and solution 2 is 140 r / min to 145 r / min, and the stirring duration is 1 h to 1.25 h.

4. The method for preparing Zn-MOFs material according to claim 2, characterized in that, Step (3) includes: mixing the solution 1 and the solution 2 and stirring to react, then settling to obtain the precipitate, with a settling time of 25 min to 30 min.

5. The method for preparing Zn-MOFs material according to claim 2, characterized in that, Before drying the precipitate, wash the precipitate 3 to 5 times with a mixed solvent of methanol and water.

6. The method for preparing Zn-MOFs material according to claim 5, characterized in that, In the mixed solvent, the volume ratio of methanol to water is 1:

1.

7. The method for preparing Zn-MOFs material according to any one of claims 2 to 6, characterized in that, The temperature for drying the precipitate is 60℃~66℃, and the drying time is 12h~15h.

8. The application of the Zn-MOFs material according to claim 1 or the Zn-MOFs material prepared by the preparation method according to any one of claims 2 to 7 in the adsorption of radon gas.

9. An air conditioner, characterized in that, The air conditioner includes an air conditioning unit (110) and a filter (120). The air conditioning unit (110) has an air inlet (101), and the filter (120) covers the air inlet (101). The filter (120) is made of Zn-MOFs material as described in claim 1 or Zn-MOFs material prepared by any one of claims 2 to 7.

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