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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

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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 and cumbersome, and the final catalyst in powder form is not conducive to practical use
However, the preparation method of the fiber membrane is relatively complex and harsh, and it is difficult to achieve large-scale, which limits its practical application.
In conclusion, it is still a great challenge to develop novel and general-purpose means to significantly improve the degradation performance of self-sterilizing fabrics to CWAs.

Method used

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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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0071] (1) Preparation of photothermal agent

[0072] Mix and stir 90mL water, 40mL ethanol and 2mL ammonia water for 30min to obtain a mixed solution. Weigh 0.5g dopamine hydrochloride and dissolve it in 10mL water and add it to the mixed solution. Stir continuously at 30°C for 24h. Washing with water three times to obtain the photothermal agent dopamine melanin nanoparticles (Dpa NPs);

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

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

Embodiment 2

[0084] A method for preparing a composite fiber membrane that photothermally enhances and degrades chemical warfare agent simulants, the steps are as follows:

[0085] (1) Preparation of spinning solution

[0086] 0.6g of Dpa@UiO-66-NH prepared in Example 1 2 Disperse evenly in 3.6g N,N-dimethylformamide solution, then add 0.4g polyacrylonitrile and stir for 12h, mix uniformly to obtain spinning solution; wherein the weight average molecular weight of polyacrylonitrile is 150000;

[0087] (2) Preparation of composite fiber membrane

[0088] Electrospinning the spinning solution obtained in step (1), the spinning conditions are: spinning voltage 16kV, electrode distance 180mm, temperature 30°C, relative humidity 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 / SEM picture of PAN Figure 9 As shown, the diameter of the fiber is 0.5-3 μm.

[0090] The composite fiber mem...

experiment example 1

[0112] The product that embodiment 1 and comparative example 1-2 obtains carries out the degradation experiment to chemical warfare agent simulant dimethoxychlor (DMNP) respectively under the condition of not adding near-infrared laser and adding near-infrared laser, and concrete steps are as follows: room temperature 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 min, and then the test tubes were placed in a dark box with a near-infrared laser and without a light source, and Circulating water was placed around it to keep the temperature at 25°C. Add 4 μL of DMNP to the above mixture and continue to stir, take out 20 μL of the solution at intervals and dilute it in 0.15M N-ethylmorpholine aqueous solution, and detect the absorbance of each sample with a UV-visible spectrophotometer to obtain the following: Figure 16-18 The conversion curve of DMNP is shown.

[0113] Depend ...

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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
CPCD04H1/728C02F1/30B01J31/1691C02F2101/34C02F2305/10C02F2101/38B01J2531/0241B01J2531/48B01J35/30B01J35/23B01J35/59B01J35/51B01J35/615B01J35/39
Inventor 李澄姚傲男焦秀玲陈代荣
Owner SHANDONG UNIV
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