Nano core-shell compound and composite fiber membrane for photothermal enhanced degradation of chemical warfare agent simulants and preparation methods and application of nano core-shell compound and composite fiber membrane

A composite fiber membrane and nano-core-shell technology, which is applied in the field of catalytic chemistry, can solve the problems of complex and harsh fiber membrane preparation methods, unfavorable practical use of catalysts, and difficulty in achieving scale, so as to solve the problems of reduced catalytic performance, long-term challenges, and improved The effect of catalytic efficiency

Active Publication Date: 2019-04-12
SHANDONG UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent document CN 107362832A discloses a preparation method of a mustard gas (HD) degradation material, through layer-by-layer self-assembly of TiO with photodegradation HD ability 2 Combined with MOFs that have the ability to hydrolyze and degrade HD, the synergistic effect of the two can be exerted to improve the degradation effect on mustard gas materials, but the layer-by-layer self-assembly process is time-consuming

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  • Nano core-shell compound and composite fiber membrane for photothermal enhanced degradation of chemical warfare agent simulants and preparation methods and application of nano core-shell compound and composite fiber membrane
  • Nano core-shell compound and composite fiber membrane for photothermal enhanced degradation of chemical warfare agent simulants and preparation methods and application of nano core-shell compound and composite fiber membrane
  • Nano core-shell compound and composite fiber membrane for photothermal enhanced degradation of chemical warfare agent simulants and preparation methods and application of nano core-shell compound and composite fiber membrane

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Example Embodiment

[0069] Example 1

[0070] A method for preparing a nano-core-shell composite for photothermal enhanced degradation of chemical warfare agent simulants, the steps are as follows:

[0071] (1) Preparation of photothermal agent

[0072] 90mL of water, 40mL of ethanol and 2mL of ammonia were mixed and stirred for 30 minutes to obtain a mixed solution. Weigh 0.5g of dopamine hydrochloride and dissolve in 10mL of water and add to the mixed solution. Stir continuously at 30°C for 24h. After the reaction, the solid was collected by centrifugation and deionized. Wash with water three times to obtain the photothermal agent dopamine melanin nanoparticles (Dpa NPs);

[0073] (2) Preparation of nano core-shell composite

[0074] Weigh 7mg of Dpa NPs in step (1) and disperse it in 50mL N,N-dimethylformamide, add 1.3mmol of zirconium chloride, stir for 5h at room temperature to obtain a dispersion, the purpose is to adsorb zirconium ions on the surface of Dpa NPs ; Add 1.3mmol 2-aminoterephthalic ac...

Example Embodiment

[0083] Example 2

[0084] A method for preparing a composite fiber membrane for photothermal enhancement and degradation of chemical warfare agent simulants, the steps are as follows:

[0085] (1) Preparation of spinning solution

[0086] 0.6g Dpa@UiO-66-NH prepared in Example 1 2 Disperse uniformly in 3.6g N,N-dimethylformamide solution, then add 0.4g polyacrylonitrile and stir for 12h, mix evenly to obtain spinning solution; wherein the weight average molecular weight of polyacrylonitrile is 150,000;

[0087] (2) Preparation of composite fiber membrane

[0088] Electrospin the spinning solution obtained in step (1) under spinning conditions: spinning voltage of 16kV, electrode distance of 180mm, temperature of 30°C, and relative humidity of 10% to obtain a composite fiber membrane, namely Dpa@UiO-66 -NH 2 / PAN.

[0089] The composite fiber membrane Dpa@UiO-66-NH prepared in this example 2 / PAN SEM image such as Picture 9 As shown, the diameter of the fiber is 0.5-3 μm.

[0090] The co...

Example Embodiment

[0111] Experimental example 1

[0112] The products obtained in Example 1 and Comparative Examples 1-2 were subjected to the degradation experiment of the chemical warfare agent simulant dimethyl pyrifen (DMNP) under the conditions of no near-infrared laser and near-infrared laser. The specific steps are as follows: room temperature Next, 6.7-7.7 mg of the above powder sample and 1 mL of 0.45 M N-ethylmorpholine aqueous solution were vigorously stirred in a 7 mL quartz test tube for 30 minutes, and then the test tubes were placed in a dark box with a near-infrared laser and no light source, and Place circulating water around it to keep the temperature at 25°C. Add 4μL of DMNP to the above mixed solution and continue to stir. Take out 20μL of the solution and dilute it in 0.15M N-ethylmorpholine aqueous solution at regular intervals. Use an ultraviolet-visible spectrophotometer to detect the absorbance of each sample to obtain Figure 16-18 Conversion curve of DMNP shown.

[0113] ...

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Abstract

The invention relates to a nano core-shell compound and composite fiber membrane for photothermal enhanced degradation of chemical warfare agent simulants and preparation methods and application of the nano core-shell compound and composite fiber membrane. According to the nano core-shell compound, a photothermal agent is adopted as a core, and MOFs are adopted as a shell, wherein the photothermalagent is dopamine melanin nanoparticles, the diameter of the particles is 150-400 nm, and the MOFs are UiO-66-NH2; the nano core-shell compound is Dpa@UiO-66-NH2, and the compound has a diameter of 300-500 nm. The composite fiber membrane is a composite fiber membrane obtained by mixing the nano core-shell compound and a spinning aid and then performing an electrospinning process, the composite fiber membrane is Dpa@UiO-66-NH2/PAN, and the diameter of the fiber is 0.5-3 [mu]m; and the nano core-shell compound and composite fiber membrane show a greatly improved catalytic efficiency for degradation of CWAs simulants under NIR laser irradiation.

Description

technical field [0001] The invention relates to a preparation method and application of a nano core-shell composite of a photothermally enhanced degradation chemical warfare agent simulant and a composite fiber membrane thereof, belonging to the field of catalytic chemistry. Background technique [0002] In today's world, chemical warfare agents (Chemical Warfare Agents, CWAs) still have a large stockpile, and may be used in various conflicts, causing continuous threats to human beings and the environment. Therefore, it is necessary to find and develop environmentally friendly Chemical warfare agent purification technology has important social significance. At present, people have done extensive research on various types of adsorbents and filters. For example, Chinese patent document CN 107584824A discloses a multifunctional breathable anti-virus clothing fabric and its preparation method. The anti-virus clothing fabric adopts multi-layer The structure is sequentially multi...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/08B01J35/06B01J35/10D04H1/728C02F1/30C02F101/34C02F101/38
CPCB01J31/1691B01J35/0013B01J35/002B01J35/004B01J35/065B01J35/08B01J35/1019B01J2531/0241B01J2531/48C02F1/30C02F2101/34C02F2101/38C02F2305/10D04H1/728
Inventor 李澄姚傲男焦秀玲陈代荣
Owner SHANDONG UNIV
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