A kind of polypyrrole/uio-66 composite aerogel and preparation method thereof

A composite airgel, uio-66 technology, applied in the direction of airgel preparation, chemical instruments and methods, colloid chemistry, etc., can solve the problems that limit the effective compounding of conductive polymer materials and the difficulty of uniform dispersion, so as to improve the electrochemistry The effects of cycle stability, simple preparation method and mild reaction conditions

Active Publication Date: 2021-07-13
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal-organic frameworks are difficult to disperse uniformly in solvents, which limits the effective combination of metal-organic frameworks and conductive polymer materials.
Moreover, previous work only studied the composite of conductive polymers and metal-organic framework compounds in the granular state or on two-dimensional substrates.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of polypyrrole / UiO-66 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) Place the polypyrrole airgel modified in step 1) in an N,N-dimethylformamide solution containing zirconium chloride and terephthalic acid, heat it to 100° C. and keep it warm for 12 hours; In the obtained reaction system, each component is calculated in parts by weight: 3 parts of modified polypyrrole airgel, 3 parts of zirconium chloride, 9 parts of terephthalic acid, 110 parts of N,N-dimethylformamide share;

[0027] 3) The reaction product obtained in step 2) was washed with methanol and dried at 90° C. for 24 hours to obtain polypyrrole / UiO-66 composite airgel.

[0028] The polypyrrole / UiO-66 composite airgel obtained in this example was e...

Embodiment 2

[0030] A kind of polypyrrole / UiO-66 composite airgel, its preparation method comprises the steps:

[0031] 1) Soak the polypyrrole airgel in a dopamine solution with a concentration of 4 mg / mL, and adjust the pH value to 8.5 with a Tris buffer solution to modify the polypyrrole airgel (react at room temperature for 20 hours);

[0032] 2) Place the polypyrrole airgel modified in step 1) in an N,N-dimethylformamide solution containing zirconium chloride and terephthalic acid, and heat it to 110°C for 15 hours; In the obtained reaction system, each component is calculated in parts by weight: 5 parts of modified polypyrrole airgel, 4 parts of zirconium chloride, 15 parts of terephthalic acid, 150 parts of N,N-dimethylformamide share;

[0033] 3) The reaction product obtained in step 2) was washed with methanol, and dried at 80° C. for 28 hours to obtain polypyrrole / UiO-66 composite airgel.

[0034] The polypyrrole / UiO-66 composite airgel obtained in this example was electrochemi...

Embodiment 3

[0036] A kind of polypyrrole / UiO-66 composite airgel, its preparation method comprises the steps:

[0037] 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 22 hours);

[0038] 2) Place the polypyrrole airgel modified in step 1) in an N,N-dimethylformamide solution containing zirconium chloride and terephthalic acid, and heat it to 120°C for 20 hours; In the obtained reaction system, each component is calculated in parts by weight: 6 parts of modified polypyrrole airgel, 6 parts of zirconium chloride, 18 parts of terephthalic acid, 230 parts of N,N-dimethylformamide share;

[0039] 3) The reaction product obtained in step 2) was washed with methanol and dried at 85° C. for 36 hours to obtain polypyrrole / UiO-66 composite airgel.

[0040] The polypyrrole / UiO-66 composite airgel obtained in this example was electrochemical...

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Abstract

The invention discloses a polypyrrole / UiO‑66 composite airgel. First, the polypyrrole airgel is modified by utilizing the self-polymerization characteristics of dopamine, and then the modified polypyrrole airgel is placed in UiO‑66 The crystallization reaction was carried out in the precursor solution of the polypyrrole / UiO‑66 composite airgel. The present invention utilizes the amino group and hydroxyl group of polydopamine and the porous structure of polypyrrole airgel to effectively adsorb zirconium ions to realize the full compounding of polypyrrole and UiO-66, which can not only improve the disadvantage of poor conductivity of UiO-66, but also effectively Improve the electrochemical cycle stability of polypyrrole, and at the same time combine the pseudocapacitance of polypyrrole with the electric double layer capacitance of UiO-66; and the preparation method involved is simple, the reaction conditions are mild, and the composite airgel can be controlled Component content, suitable for fields such as supercapacitors.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a polypyrrole / UiO-66 composite airgel and a preparation method thereof. Background technique [0002] Conductive polymer materials, such as polyaniline, polypyrrole, polythiophene, etc., have readily available raw materials and simple synthesis processes. Conductive polymers have a unique polymer chain conjugated structure, which can undergo reversible redox reactions at different voltages, and have better specific capacity and specific energy than carbon materials. However, during the long-term charging and discharging process of the conductive polymer material, the volume of the conductive polymer material will expand and shrink greatly, which greatly reduces its specific capacitance and weakens the electrochemical stability. [0003] In recent years, metal-organic framework compounds use organic ligands as linkers, metal ions as nodes, and a skeleton structure materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00
CPCB01J13/0091
Inventor 李亮孙丽喻湘华穆海梅张桥
Owner WUHAN INSTITUTE OF TECHNOLOGY
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