A kind of polypyrrole/zif-67 composite airgel and preparation method thereof

A ZIF-67, composite aerogel technology, applied in aerogel preparation, chemical instruments and methods, colloidal chemistry and other directions, can solve the problems of difficult uniform dispersion, limit the effective composite of conductive polymer materials, etc., and achieve a simple preparation method. , Improve the electrochemical cycle stability, the effect of mild reaction conditions

Active Publication Date: 2021-08-13
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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Abstract

The invention discloses a polypyrrole / ZIF‑67 composite airgel. Firstly, the polypyrrole airgel is modified by using the self-polymerization property of dopamine, and then the modified polypyrrole airgel is repeatedly soaked in nitric acid successively. In the organic solution of cobalt and the organic solution of 2-methylimidazole, polypyrrole / ZIF-67 composite airgel was obtained. The invention utilizes the amino groups and hydroxyl groups of polydopamine to effectively coordinate and adsorb cobalt ions to realize the effective compounding of polypyrrole airgel and ZIF-67, which can improve the poor conductivity of ZIF-67 and effectively improve the electrochemical performance of polypyrrole Cyclic stability, and at the same time can realize the combination of polypyrrole pseudocapacitance and ZIF-67 electric double layer capacitance; and the preparation method involved is simple, the reaction conditions are mild, and the component content of the composite airgel can be controlled, which is suitable for Supercapacitors and other fields.

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 Patents(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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