Polypyrrole/ZIF-67 composite aerogel and preparation method thereof

A technology of ZIF-67 and composite airgel, which is applied in the fields of airgel preparation, chemical instruments and methods, colloid chemistry, etc., can solve problems such as difficulty in uniform dispersion and restrictions on the effective compounding of conductive polymer materials, and achieve a simple preparation method , Improve electrochemical cycle stability, mild reaction conditions

Active Publication Date: 2019-03-22
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal-organic framework compounds are prone to aggregation, and metal-organic framework compounds are difficult to disperse uniformly in solvents, which limits the effective combination of metal-organic framework compounds and conductive polymer materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of polypyrrole / ZIF-67 composite airgel, its preparation method comprises the steps:

[0025] 1) Soak the polypyrrole airgel in a dopamine solution with a concentration of 3 mg / mL, and adjust the pH value to 8.0 with Tris buffer solution to modify the polypyrrole airgel (react at room temperature for 18 hours);

[0026] 2) Soak the polypyrrole airgel modified in step 1) repeatedly in methanol solution of cobalt nitrate and methanol solution of 2-methylimidazole in sequence, wash with methanol, and dry (50°C, 24h), Obtain polypyrrole / ZIF-67 composite airgel; Each raw material adopted in this step counts by weight: 3 parts of polypyrrole airgel after modification, 400 parts of methanol solutions of cobalt nitrate (wherein cobalt nitrate is 10 parts), 400 parts of methanol solution of 2-methylimidazole (wherein 25 parts of 2-methylimidazole); the time of each soaking is 1h, and the number of times of repeated soaking is 6 times.

[0027] The polypyrrole / ZIF-67 compo...

Embodiment 2

[0029] A kind of polypyrrole / ZIF-67 composite airgel, its preparation method comprises the steps:

[0030] 1) Soak the polypyrrole airgel in a dopamine solution with a concentration of 5 mg / mL, and adjust the pH value to 9.0 with Tris buffer solution to modify the polypyrrole airgel (react at room temperature for 20 hours);

[0031] 2) Soak the polypyrrole airgel modified in step 1) repeatedly in methanol solution of cobalt nitrate and methanol solution of 2-methylimidazole in sequence, wash with methanol, and dry (60°C, 36h), Obtain polypyrrole / ZIF-67 composite airgel; Each raw material adopted in this step is counted as by weight: 4 parts of polypyrrole airgel after modification, 500 parts of methanol solutions of cobalt nitrate (wherein cobalt nitrate is 20 parts), 600 parts of methanol solution of 2-methylimidazole (35 parts of 2-methylimidazole); the time of each soaking is 2h, and the number of times of repeated soaking is 8 times.

[0032] The polypyrrole / ZIF-67 compos...

Embodiment 3

[0034] A kind of polypyrrole / ZIF-67 composite airgel, its preparation method comprises the steps:

[0035] 1) Soak the polypyrrole airgel in a dopamine solution with a concentration of 3 mg / mL, and adjust the pH value to 8.0 with Tris buffer solution to modify the polypyrrole airgel (react at room temperature for 20 hours);

[0036] 2) Soak the polypyrrole airgel modified in step 1) repeatedly in methanol solution of cobalt nitrate and methanol solution of 2-methylimidazole in sequence, wash with methanol, and dry (55°C, 48h), Obtain polypyrrole / ZIF-67 composite airgel; Each raw material adopted in this step is counted as by weight: 6 parts of polypyrrole airgel after modification, 600 parts of methanol solutions of cobalt nitrate (wherein cobalt nitrate is 20 parts), 600 parts of methanol solution of 2-methylimidazole (wherein 40 parts of 2-methylimidazole); the time of each soaking is 2.5h, and the number of times of repeated soaking is 9 times.

[0037] The polypyrrole / ZIF...

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PUM

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Abstract

The invention discloses polypyrrole / ZIF-67 composite aerogel. A preparation method comprises the following steps: firstly modifying polypyrrole aerogel by utilizing the auto polymerization characteristic of dopamine, and then sequentially and repeatedly immersing the modified polypyrrole aerogel in an organic solution of cobalt nitrate and an organic solution of 2-methylimidazole, thus obtaining the polypyrrole / ZIF-67 composite aerogel. According to the polypyrrole / ZIF-67 composite aerogel disclosed by the invention, effective coordination adsorption is carried out on cobalt ions by utilizingan amino group and a hydroxyl group of polydopamin, effective compounding of the polypyrrole aerogel and the ZIF-67 is realized, the defects of poorer electroconductivity and the like of the ZIF-67 can be improved, the electrochemical cycle stability of the polypyrrole can be effectively increased, and meanwhile, combination of faradaic pseudocapacitance of the polypyrrole and electrical double-layer capacitance of the ZIF-67 can be realized. The preparation method is simple, reaction conditions are gentle, the component content of the composite aerogel can be controlled, and the preparation method can be applied to the fields of supercapacitors and the like.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a polypyrrole / ZIF-67 composite airgel and a preparation method thereof. Background technique [0002] Macroscopic three-dimensional materials, such as hydrogels, aerogels, foams, sponges, etc., have interpenetrating mesoscopic or macroscopic porous structures, low mass density, and large specific surface area, and are widely used in energy storage, conductive sensors, and catalysts. Carriers and recyclable adsorption materials and other fields. Generally, materials such as polymers, graphene, carbon nanotubes, and silicon dioxide can form macroscopic three-dimensional materials. [0003] As one of the most common conductive polymers, polypyrrole has been widely studied due to its simple preparation process, environmental friendliness, good biocompatibility, and good conductivity; however, during its long-term electrochemical use, polypyrrole will Large volume expansion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00
CPCB01J13/0091
Inventor 李亮孙丽喻湘华黄华波熊丽君
Owner WUHAN INSTITUTE OF TECHNOLOGY
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