Zinc metal eutectic, preparation method and application thereof in photocatalytic degradation of chemical warfare agents

Abstract

The application discloses a zinc metal eutectic crystal, a preparation method thereof and application of the zinc metal eutectic crystal in photocatalytic degradation of chemical warfare agents. The zinc metal eutectic crystal is synthesized by using pyrene, 7,7,8,8-tetracyanoquinodimethane and zinc acetate dihydrate as raw materials, adding an organic solvent and adopting a simple solvent evaporation method, and the product is marked as: Zn 2+ -TCNQ-Py. The application can obtain the zinc metal eutectic crystal by the simple and low-cost solvent evaporation method, and the disadvantages of low yield and time consumption are overcome. Meanwhile, the Zn 2+ -TCNQ-Py has a strong active oxygen generation capacity, can photocatalytically degrade a chemical warfare agent, mustard gas analog, into low-toxicity 2-chloroethyl ethyl sulfoxide, has superior degradation efficiency and good cycle stability, and has high practical application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of material preparation technology and environmental chemistry, in particular to a preparation method of zinc metal eutectic and its application in detoxification of mustard gas simulant. BACKGROUND

[0002] Chemical warfare agents CWAs were first used in large quantities during the world war. After that, although it has been banned, there are still a large number of chemical warfare agent stocks in some countries that have not been destroyed. Current research on the detoxification of chemical warfare agents mainly focuses on nerve agents, blister agents, etc., among which one of the representatives of the blister agent is sulfur mustard (HD) - bis (2-chloroethyl) sulfide. HD is the most produced, stored and even used chemical warfare agent so far, known as the "King of Toxic Agents", with strong, fast and persistent toxic effects, posing a serious threat to global social safety. HD is a vesicant agent that is harmful to human proteins and DNA, causing skin blisters, eye irritation, respiratory damage, and even fatal death.

[0003] Currently, there are three main ways to degrade sulfur mustard, namely dehydrohalogenation, hydrolysis and oxidation. The dehydrohalogenation degradation rate is too slow to effectively degrade sulfur mustard, while the hydrolysis is limited by poor solubility in water and intermediate products, which also cannot effectively degrade sulfur mustard. The most effective way to degrade sulfur mustard is to use a mild oxidizing agent to selectively oxidize the sulfide to a non-toxic sulfoxide instead of completely oxidizing it to a highly toxic sulfone. In experiments, a less toxic HD simulant, 2-chloroethyl ethyl sulfide (CEES), is usually used as the degradation object, and active oxygen is generated by a photosensitizer to oxidize CEES to a less toxic 2-chloroethyl ethyl sulfoxide (CEESO). This method is not only efficient, but also simple and safe to operate. Currently, there have been studies exploring a variety of materials for photocatalytic oxidation of CEES. Such photosensitizers generally need to meet the following two conditions: ① can quickly generate a large amount of active oxygen; ② provide enough catalytic active sites. Metal-organic frameworks (MOFs) contain rich metal catalytic sites and have been successfully used as photosensitizers for rapid and selective detoxification of HD or its simulant CEES. However, the stability of MOFs needs to be improved, and the synthesis of MOFs usually requires high temperature conditions and a long time. Eutectic engineering has been proven to be an effective method to improve the photoelectric performance of organic materials, and has great potential in the fields of organic field effect transistors, organic photovoltaics and near-infrared photothermal imaging. However, there are still challenges in developing its photocatalytic degradation application using organic eutectic strategy. So far, there is no application of eutectic materials in the degradation of mustard gas simulant. Doping metals in eutectic materials is expected to make up for the shortcomings of MOFs and expand their photocatalytic application fields. However, the preparation of metal eutectic still has the disadvantages of complicated steps, time-consuming and poor stability, which greatly limits its practical application.

[0004] Therefore, how to provide a metal eutectic with a simple preparation method, good stability, and excellent photocatalytic performance for the efficient degradation of chemical warfare agent-mustard gas simulants is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a zinc metal eutectic, its preparation method, and its application in the photocatalytic degradation of chemical warfare agents.

[0006] It should be noted that the zinc metallized eutectic material prepared by the method of this invention has the characteristics of simple synthesis, material stability, and environmental friendliness. The zinc metallized eutectic can generate a large amount of singlet oxygen under light irradiation. 1 O2) and superoxide anion (O2) ·- It can photocatalytically degrade the mustard gas mimic 2-chloroethyl ethyl sulfide (CEES) into low-toxicity 2-chloroethyl ethyl sulfoxide (CEESO), and has the characteristics of fast degradation rate, high efficiency, good selectivity and excellent cycle performance.

[0007] To achieve the above objectives, the following technical solution is adopted:

[0008] The first technical objective of this invention is to provide a zinc metal eutectic, which is synthesized from pyrene, 7,7,8,8-tetracyanobenzoquinone dimethane, and zinc acetate dihydrate as raw materials, with the addition of an organic solvent, by solvent evaporation. The product is labeled as: Zn 2+ -TCNQ-Py.

[0009] The second technical objective of this invention is to provide a method for preparing the zinc metal eutectic as described above, which is a one-step method for preparing zinc metallized eutectic materials, specifically including the following steps:

[0010] In a glass bottle, 7,7,8,8-tetracyanobenzoquinone dimethane and an organic solvent were added and dispersed using an ultrasonic apparatus. Zinc acetate dihydrate was then added to another glass bottle. In a separate glass bottle, pyrene and an organic solvent were added and dispersed using an ultrasonic apparatus. The solutions from the two bottles were mixed in a specific ratio and reacted at room temperature for 1-12 hours. After the reaction was complete, the mixture was filtered, washed with water and methanol, and dried to obtain Zn. 2+ -TCNQ-Py.

[0011] Optionally, the molar ratio of pyrene, 7,7,8,8-tetracyanobenzoquinone dimethane and zinc acetate dihydrate is (1-3):(1-2):(1-2), and the preferred molar ratio of pyrene, 7,7,8,8-tetracyanobenzoquinone dimethane and zinc acetate dihydrate is 3:2:1.

[0012] Optionally, the organic solvent is acetic acid or acetonitrile, and the amount of the organic solvent added is such that the concentration of pyrene is (0.01-0.03) mmol / mL, the concentration of 7,7,8,8-tetracyanoquinodimethane is (0.01-0.02) mmol / mL, and the concentration of zinc acetate dihydrate is (0.01-0.02) mmol / mL.

[0013] Preferably, the organic solvent is acetonitrile, and the amount of the organic solvent added is such that the concentration of pyrene is 0.03 mmol / mL, the concentration of 7,7,8,8-tetracyanoquinodimethane is 0.02 mmol / mL, and the concentration of zinc acetate dihydrate is 0.01 mmol / mL.

[0014] Optionally, the mixing ratio of the 7,7,8,8-tetracyanoquinodimethane and zinc acetate dihydrate solution to the pyrene solution is 1:(1-3), and the preferred volume ratio of the mixing of the 7,7,8,8-tetracyanoquinodimethane and zinc acetate dihydrate solution to the pyrene solution is 1:1.

[0015] A third technical objective of the present application is to provide an application of the zinc metal eutectic prepared by the preparation method as described above in the photocatalytic degradation of chemical warfare agents - mustard gas simulators, in particular, the application of the zinc metal eutectic in the photocatalytic degradation of sulfur mustard simulators 2-chloroethyl ethyl sulfide (CEES).

[0016] A method for photocatalytic degradation of trace sulfur mustard simulators by zinc metal eutectic, which comprises the following steps:

[0017] (1) 2 mg of the prepared Zn 2+ -TCNQ-Py is placed in a reaction device capable of magnetic stirring, and the device is filled with oxygen after checking the air tightness;

[0018] (2) 1 mL of a mixed solution of deuterated methanol (CD3OD-d4), 3.4 μL of dibromomethane and 5.6 μL of mustard gas simulator 2-chloroethyl ethyl sulfide (CEES) is injected into the device using a syringe, and ultrasonic treatment is performed for 1-10 minutes;

[0019] (3) During the reaction, simulated sunlight is used for irradiation, and samples are taken at different time intervals to monitor the reaction rate;

[0020] (4) The reaction product is determined by HNMR, and the degradation rate of the sulfur mustard simulator is calculated. 1 HNMR, calculate the degradation rate of sulfur mustard simulators.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] 1. The present application can quickly synthesize zinc metal eutectic material at room temperature by a simple solvent evaporation method, and the synthesis method has the characteristics of simplicity, speed, low cost and environmental friendliness.

[0023] 2. The zinc metal eutectic Zn 2+ -TCNQ-Py can generate singlet oxygen (O2 1 ) and superoxide anion (O2 ·- ) under light irradiation.

[0024] 3. The zinc metal eutectic Zn 2+ -TCNQ-Py has high catalytic activity and can quickly degrade the mustard gas simulant 2-chloroethyl ethyl sulfide (CEES) into low-toxicity 2-chloroethyl ethyl sulfoxide (CEESO) under light irradiation. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0026] Figure 1 is the XRD pattern of the zinc metal eutectic Zn 2+ -TCNQ-Py.

[0027] Figure 2 is the EDS element distribution map of the zinc metal eutectic Zn 2+ -TCNQ-Py.

[0028] Figure 3 is the XRD pattern of the zinc metal eutectic Zn 2+ -TCNQ-Py under O2 atmosphere and xenon lamp simulated sunlight irradiation conditions for photocatalytic degradation of CEES. 1 HNMR spectrum.

[0029] Figure 4 is the XRD pattern of the zinc metal eutectic Zn 2+ -TCNQ-Py under actual air atmosphere and xenon lamp simulated sunlight irradiation conditions for photocatalytic degradation of CEES. 1 HNMR spectrum.

[0030] Figure 5 is the time required for complete photocatalytic degradation of CEES by the zinc metal eutectic Zn 2+ -TCNQ-Py prepared under different volume ratios.

[0031] Figure 6 is the influence of different scavengers on the catalytic oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) by the zinc metal eutectic Zn 2+ -TCNQ-Py.

[0032] Figure 7 Zinc metal eutectic Zn 2+ EPR spectra of TCNQ-Py mixed with DMPO under visible light irradiation or in the dark.

[0033] Figure 8 Zinc metal eutectic Zn 2+ EPR spectra of TCNQ-Py mixed with DMPO under visible light irradiation or in the dark.

[0034] Figure 9 Zinc metal eutectic Zn 2+ EPR spectra of TCNQ-Py mixed with DMPO under visible light irradiation or in the dark. 1 HNMR spectra. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0036] Herein, the term "embodiment" is used as "exemplary" to explain any embodiment, which is not necessarily construed as superior or better than other embodiments. In the performance index test of the embodiments of the present application, unless otherwise specified, the conventional test method in the art is adopted. It should be understood that the terms described in the present application are only used to describe the specific embodiments, and are not used to limit the disclosure of the present application.

[0037] Unless otherwise specified, the technical and scientific terms used herein have the same meanings as commonly understood by a person of ordinary skill in the art to which the present application belongs; and the test methods and technical means not specially noted in the present application refer to the test methods and technical means commonly used by a person of ordinary skill in the art.

[0038] In order to better illustrate the content of the present application, numerous specific details are given in the specific embodiments below. A person of ordinary skill in the art should understand that the present application can also be implemented without some specific details. In the embodiments, some methods, means, instruments, devices and the like which are well known to a person of ordinary skill in the art are not described in detail, in order to highlight the main idea of the present application.

[0039] The technical features disclosed in the embodiments of the present application can be combined in any manner without conflict, and the technical solutions obtained by the combination belong to the disclosure of the embodiments of the present application.

[0040] The present application discloses a zinc metal eutectic, a preparation method and an application thereof in the photocatalytic degradation of chemical warfare agents.

[0041] For better understanding of the present application, the following examples are further illustrated in detail, but can not be understood as limiting the present application, and some non-essential improvements and adjustments made by those skilled in the art according to the above content of the application are also regarded as falling within the scope of the present application.

[0042] Example 1:

[0043] A preparation method of a zinc metal eutectic material, specifically comprising the following steps:

[0044] In a glass bottle, 7,7,8,8-tetracyanoquinodimethane (20.4 mg, 0.10 mmol) and organic solvent acetonitrile (5 mL) were added, and then dispersed in an ultrasonic instrument. Then, zinc acetate dihydrate (10.9 mg, 0.05 mmol) was added to the glass bottle. In another glass bottle, pyrene (30.3 mg, 0.15 mmol) and organic solvent acetonitrile (5 mL) were added, and then dispersed in an ultrasonic instrument. The solutions in the two glass bottles were mixed in a volume ratio of 1:1, and then reacted at room temperature for 2 hours. After the reaction was completed, filtration and washing with water and methanol were performed, and then drying was performed to obtain Zn 2+ -TCNQ-Py, namely the zinc metal eutectic.

[0045] Example 2:

[0046] A preparation method of a zinc metal eutectic material, specifically comprising the following steps:

[0047] In a glass bottle, 7,7,8,8-tetracyanoquinodimethane (20.4 mg, 0.10 mmol) and organic solvent acetonitrile (5 mL) were added, and then dispersed in an ultrasonic instrument. Then, zinc acetate dihydrate (10.9 mg, 0.05 mmol) was added to the glass bottle. In another glass bottle, pyrene (60.6 mg, 0.30 mmol) and organic solvent acetonitrile (10 mL) were added, and then dispersed in an ultrasonic instrument. The solutions in the two glass bottles were mixed in a volume ratio of 1:2, and then reacted at room temperature for 2 hours. After the reaction was completed, filtration and washing with water and methanol were performed, and then drying was performed to obtain Zn 2+ -TCNQ-Py, namely the zinc metal eutectic.

[0048] Example 3:

[0049] A preparation method of a zinc metal eutectic material, specifically comprising the following steps:

[0050] In a glass bottle, 7,7,8,8-tetracyanoquinodimethane (10.2 mg, 0.10 mmol) and an organic solvent acetonitrile (5 mL) were added, and then the glass bottle was placed in an ultrasonic instrument for dispersion. Then, zinc acetate dihydrate (10.9 mg, 0.05 mmol) was added to the glass bottle. In another glass bottle, pyrene (90.9 mg, 0.45 mmol) and an organic solvent acetonitrile (15 mL) were added, and then the glass bottle was placed in an ultrasonic instrument for dispersion. The solutions in the two glass bottles were mixed in a volume ratio of 1:3, and then the mixture was reacted at room temperature for 2 hours. After the reaction was completed, the product was filtered, washed with water and methanol, and dried to obtain Zn 2+ -TCNQ-Py, that is, the zinc metal eutectic.

[0051] In order to further prove the beneficial effects of the present application and better understand the present application, the technical features disclosed in the present application are further illustrated by the following comparative examples and application examples, but it should not be understood as a limitation of the present application. Other improvements without creative work made by those skilled in the art according to the above disclosure are also considered to fall within the protection scope of the present application.

[0052] Comparative Example 1

[0053] In a glass bottle, 7,7,8,8-tetracyanoquinodimethane (20.4 mg, 0.10 mmol) and an organic solvent acetonitrile (5 mL) were added, and then the glass bottle was placed in an ultrasonic instrument for dispersion. Then, zinc chloride (6.8 mg, 0.05 mmol) was added to the glass bottle. In another glass bottle, pyrene (30.3 mg, 0.15 mmol) and an organic solvent acetonitrile (5 mL) were added, and then the glass bottle was placed in an ultrasonic instrument for dispersion. The solutions in the two glass bottles were mixed in a volume ratio of 1:1, and then the mixture was reacted at room temperature for 2 hours. After the reaction was completed, the product was filtered, washed with water and methanol, and dried to obtain Zn 2+ -TCNQ-Py, that is, the zinc metal eutectic.

[0054] Comparative Example 2

[0055] In a glass bottle, 7,7,8,8-tetracyanoquinodimethane (20.4 mg, 0.10 mmol) and an organic solvent acetonitrile (5 mL) were added, and then the glass bottle was placed in an ultrasonic instrument for dispersion. Then, zinc acetate dihydrate (10.9 mg, 0.05 mmol) was added to the glass bottle. In another glass bottle, pyrene (30.3 mg, 0.15 mmol) and an organic solvent acetonitrile (5 mL) were added, and then the glass bottle was placed in an ultrasonic instrument for dispersion. The solutions in the two glass bottles were mixed in a volume ratio of 1:1, and then the mixture was reacted at room temperature for 2 hours. After the reaction was completed, the product was filtered, washed with water and methanol, and dried to obtain Zn 2+ -TCNQ-Py, that is, the zinc metal eutectic.

[0056] Experiment 1: Zinc metal eutectic Zn 2+Application of TCNQ-Py to detoxify the mustard gas simulant 2-chloroethyl ethyl sulfide (CEES)

[0057] 2 mg of zinc metal eutectic Zn 2+ TCNQ-Py was placed in a glass apparatus equipped with magnetic stirring, sealed and bubbled with O2 for 20 minutes, a mixture of deuterated methanol (CD3OD-d4), dibromomethane and the mustard gas simulant 2-chloroethyl ethyl sulfide (CEES) was injected into the glass bottle by means of a syringe, after five minutes of sonication, the reaction rate was monitored by irradiation with simulated sunlight and sampling at different time intervals.

[0058] Experiment 2: zinc metal eutectic Zn 2+ Application of TCNQ-Py to detoxify the mustard gas simulant 2-chloroethyl ethyl sulfide (CEES) in real air

[0059] 2 mg of zinc metal eutectic Zn 2+ TCNQ-Py was placed in a glass apparatus equipped with magnetic stirring, the valve was opened to allow the entry of ambient air, a mixture of deuterated methanol (CD3OD-d4), dibromomethane and the mustard gas simulant 2-chloroethyl ethyl sulfide (CEES) was injected into the glass bottle by means of a syringe, after five minutes of sonication, the reaction rate was monitored by irradiation with simulated sunlight and sampling at different time intervals.

[0060] Experiment 3: zinc metal eutectic Zn 2+ Cyclability stability experiment of TCNQ-Py photocatalytic degradation of the mustard gas simulant 2-chloroethyl ethyl sulfide (CEES)

[0061] 2 mg of zinc metal eutectic Zn 2+ TCNQ-Py was placed in a glass apparatus equipped with magnetic stirring, sealed and bubbled with O2 for 20 minutes, a mixture of deuterated methanol (CD3OD-d4), dibromomethane and the mustard gas simulant 2-chloroethyl ethyl sulfide (CEES) was injected into the glass bottle by means of a syringe, after five minutes of sonication, the reaction rate was monitored by irradiation with simulated sunlight and sampling at different time intervals. 1 H NMR spectrum. After a new photocatalytic reaction by means of a syringe injecting a mixture of deuterated methanol (CD3OD-d4), dibromomethane and the mustard gas simulant 2-chloroethyl ethyl sulfide (CEES) into the glass bottle, sampling at the end of the reaction 1 H NMR spectrum; after five repetitions, the Zn 2+ TCNQ-Py still degrades the mustard gas simulant 2-chloroethyl ethyl sulfide with an efficiency of more than 90% with good cyclability stability.

[0062] The specific results are analyzed as follows:

[0063] Figure 1 Zn-TCNQ-Py prepared in Example 1 2+ The powder X-ray diffraction (PXRD) pattern of Zn-TCNQ-Py. Zn-TCNQ-Py prepared in Example 1 2+ Zn-TCNQ-Py still kept a high crystallinity, indicating that the introduction of metal did not destroy the eutectic crystal structure.

[0064] Figure 2 Zn-TCNQ-Py prepared in Example 1 2+ The EDS pattern of Zn-TCNQ-Py. Zn-TCNQ-Py prepared in Example 1 2+ Zn-TCNQ-Py had a rod-like morphology, and C, N, Zn elements were uniformly distributed in the material, which further indicated that the metal Zn had been successfully introduced into the Zn-TCNQ-Py eutectic.

[0065] Figure 3 Zn-TCNQ-Py prepared in Example 1 under simulated sunlight irradiation 2+ The photocatalytic oxidation of CEES by Zn-TCNQ-Py under simulated sunlight irradiation 1 H NMR spectrum. Under light irradiation, Zn-TCNQ-Py prepared in Example 1 2+ Zn-TCNQ-Py had high catalytic activity, and it only took 6 minutes to completely convert CEES into non-toxic oxidation product CEESO under O2 atmosphere. Even after 40 minutes of reaction, no toxic CEESO2 product was detected, indicating that 100% selectivity was achieved.

[0066] Figure 4 Zn-TCNQ-Py prepared in Example 1 under simulated sunlight irradiation in air 2+ The photocatalytic oxidation of CEES by Zn-TCNQ-Py under simulated sunlight irradiation in air 1 H NMR spectrum. Under actual air atmosphere conditions, Zn-TCNQ-Py prepared in Example 1 2+ Zn-TCNQ-Py still had high catalytic activity, and it could degrade 70% of CEES in 5 minutes and completely convert CEES into non-toxic oxidation product CEESO in 20 minutes, and no toxic CEESO2 product was detected, indicating that 100% selectivity was achieved under actual air conditions.

[0067] Figure 5 Zn-TCNQ-Py prepared in Examples 1-3 with different volume ratios 2+ The time required for Zn-TCNQ-Py to completely convert CEES into non-toxic oxidation product CEESO under simulated sunlight irradiation and O2 atmosphere. With the increase of the volume ratio of pyrene solution, Zn-TCNQ-Py prepared in Example 1 2+ The efficiency of Zn-TCNQ-Py photocatalytic oxidation of CEES gradually decreased, and the optimal volume ratio was 1:1.

[0068] Figure 6 Zn-TCNQ-Py prepared in Example 1 2+The reactive oxygen species (ROS) in the photocatalytic oxidation process of -TCNQ-Py were investigated, and tryptophan (Trp), ascorbic acid (AA), catalase (CAT), and isopropanol (IPA) were selected as the main components. 1 O2, O2 ·- The oxidation color development of 3,3′,5,5′-tetramethylbenzidine (TMB) was significantly inhibited after the addition of Trp and AA, while the effect of other scavengers on absorbance was negligible. This indicates that the main product generated during photocatalysis is ·OH. 1 O2 and O2 ·- .

[0069] Figure 7 Using TEMP as a probe, Zn 2+ Electron paramagnetic resonance (EPR) spectra of -TCNQ-Py under illumination or darkness. Under illumination, the EPR spectrum shows... 1 The characteristic triplet signal of O2 was not observed in the EPR spectrum under dark conditions. 1 The characteristic peak of O2. EPR results indicate that Zn 2+ -TCNQ-Py can rapidly generate large amounts of [something] under light. 1 O2 then oxidizes CEES to CEESO.

[0070] Figure 8 Using DMPO as a probe, Zn 2+ Electron paramagnetic resonance (EPR) spectra of -TCNQ-Py under both light and dark conditions. Under light conditions, the EPR spectrum shows O2. ·- The characteristic signal of O2 was observed in the EPR spectrum under dark conditions, but not in the dark. · - characteristic peaks. EPR results indicate that Zn 2+ -TCNQ-Py can rapidly generate a large amount of O2 under light. · - This process oxidizes CEES to CEESO.

[0071] Figure 9 It is Zn 2+ -TCNQ-Py photocatalytic degradation of mustard gas mimic 2-chloroethyl ethyl sulfide (CEES) in five cycles 1 1H NMR spectrum. After five cycles of the experiment, Zn 2+ -TCNQ-Py photo-oxidative detoxification of CEES achieves an efficiency of over 90% and exhibits good cycle stability, giving it an advantage in practical applications.

[0072] The above results indicate that Zn 2+ -TCNQ-Py is an excellent material for rapidly and safely degrading CEES.

[0073] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Numerous modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without the use of the inventive faculty. Therefore, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A zinc metal eutectic characterized in that, The zinc metal eutectic is synthesized by solvent evaporation method using pyrene, 7,7,8,8-tetracyanoquinodimethane, zinc acetate dihydrate as raw materials, and an organic solvent is added. The product is marked as: Zn 2+ - TCNQ-Py, the powder X-ray diffraction pattern is shown in Figure 1.

2. A process for the production of zinc metal eutectic as claimed in claim 1, characterized in that, Specifically comprising the following steps: In a glass bottle, 7,7,8,8-tetracyanoquinodimethane and an organic solvent were added, and after being dispersed in an ultrasonic instrument, zinc acetate dihydrate was added to the glass bottle; in another glass bottle, pyrene and an organic solvent were added, and after being dispersed in an ultrasonic instrument, the solutions in the two glass bottles were mixed in a certain proportion, and then reacted at room temperature for 1-12 hours; after the reaction was completed, filtration and washing with water and methanol were performed, and then drying was performed to obtain Zn 2+ -TCNQ-Py, namely the zinc metal eutectic.

3. The method of producing zinc metal eutectic according to claim 2, characterized by, The molar ratio of pyrene, 7,7,8,8-tetracyanoquinodimethane and zinc acetate dihydrate is (1-3):(1-2):(1-2).

4. The method of producing zinc metal eutectic according to claim 2, characterized by, The organic solvent is acetic acid or acetonitrile, and the amount of the organic solvent is added to make the concentration of pyrene (0.01-0.03) mmol / mL, the concentration of 7,7,8,8-tetracyanoquinodimethane (0.01-0.02) mmol / mL, and the concentration of zinc acetate dihydrate (0.01-0.02) mmol / mL.

5. The method of producing zinc metal eutectic according to claim 2, characterized by, The mixing ratio of 7,7,8,8-tetracyanoquinodimethane and zinc acetate dihydrate solution to pyrene solution is 1: (1-3).

6. The use of the zinc metal eutectic crystal of claim 1 or the zinc metal eutectic crystal obtained by the method of claim 2 in the photocatalytic degradation of chemical warfare agent - mustard gas simulant.

7. Use according to claim 6, characterized in that, In the method of photocatalytic degradation of trace mustard gas simulant by the zinc metal eutectic crystal, the zinc metal eutectic crystal can selectively oxidize 2-chloroethyl ethyl sulfide (CEES) to low-toxicity 2-chloroethyl ethyl sulfoxide (CEESO).

Images