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Preparation method of porous graphene/polypyrrole electrode material

A technology of porous graphene and polypyrrole, applied in separation methods, chemical instruments and methods, water/sewage treatment, etc., can solve the problem of no obvious effect of graphene, and achieve improved conductivity, enriched pore structure, and increased specific surface area. Effect

Active Publication Date: 2017-12-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the initiators that make pyrrole polymerize on graphene are ferric chloride and ammonium persulfate, but these two initiators can only play the role of polymerizing pyrrole, but have no obvious effect on graphene

Method used

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  • Preparation method of porous graphene/polypyrrole electrode material
  • Preparation method of porous graphene/polypyrrole electrode material
  • Preparation method of porous graphene/polypyrrole electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Prepare a 4mg / mL graphite oxide solution in a 250mL volumetric flask, and put it into an ultrasonic instrument for ultrasonic dispersion for 2 hours to obtain a graphene oxide solution.

[0027] (2) Add 1mL distilled water and 1mL ethanol to the beaker, then add 250uL pyrrole (pure pyrrole) and 60.4mL graphene oxide solution (that is, the mass ratio of graphene oxide to pyrrole is about 1:1) while stirring .

[0028] (3) Under the condition of vigorous stirring, add 9.8mg ferrous chloride tetrahydrate to the mixed solution in step (2). After mixing evenly, 722uL of hydrogen peroxide with a mass fraction of 30% (that is, the molar ratio of pyrrole to hydrogen peroxide is 1:2) was added dropwise to the mixed solution by a peristaltic pump at a speed of 500uL / min under the condition of an ice-water bath. ; The mass ratio of ferrous chloride tetrahydrate and hydrogen peroxide is 1:25). The reaction was continued for 24 h with constant stirring.

[0029] (4) Add 241.6...

Embodiment 2

[0032] (1) Prepare a 2mg / mL graphite oxide solution in a 250mL volumetric flask, and put it into an ultrasonic instrument for ultrasonic dispersion for 2 hours to obtain a graphene oxide solution.

[0033] (2) Add 1 mL of distilled water and 1 mL of ethanol to the beaker, and then add 250 uL of pyrrole (pure pyrrole) and 120.8 mL of graphene oxide solution (that is, the mass ratio of graphene oxide to pyrrole is 1:1) under stirring.

[0034] (3) Under the condition of vigorous stirring, add 2.45mg ferrous chloride tetrahydrate to the mixed solution in step (2). After mixing evenly, under the condition of an ice-water bath, 361uL of hydrogen peroxide with a mass fraction of 30% was added dropwise to the mixed solution by a peristaltic pump at a speed of 500uL / min (that is, the molar ratio of pyrrole to hydrogen peroxide was 1:1). ; The mass ratio of ferrous chloride tetrahydrate and hydrogen peroxide is 1:50). The reaction was continued for 24 h with constant stirring.

[003...

Embodiment 3

[0038] (1) Prepare 8mg / mL graphite oxide solution in a 250mL volumetric flask, and put it into an ultrasonic instrument for ultrasonic dispersion for 2 hours to obtain a graphene oxide solution.

[0039] (2) Add 1 mL of distilled water and 1 mL of ethanol to the beaker, and then add 250 uL of pyrrole (pure pyrrole) and 241.6 mL of graphene oxide solution (that is, the mass ratio of graphene oxide to pyrrole is 1:8) in a stirring state.

[0040] (3) Under the condition of vigorous stirring, add 9.8mg ferrous chloride tetrahydrate to the mixed solution in step (2). After mixing evenly, under the condition of an ice-water bath, 1444uL of hydrogen peroxide with a mass fraction of 30% was added dropwise to the mixed solution by a peristaltic pump at a speed of 500uL / min (that is, the molar ratio of pyrrole to hydrogen peroxide was 1:4). ; The mass ratio of ferrous chloride tetrahydrate and hydrogen peroxide is 1:50). The reaction was continued for 24 h with constant stirring.

[...

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Abstract

The invention discloses a preparation method of a porous graphene / polypyrrole electrode material. The preparation method of the porous graphene / polypyrrole electrode material comprises dissolving pyrrole in a water-ethanol mixed solution, and then adding in a certain amount of graphene oxide; in an ice-water bath, adding in and uniformly mixing ferrous chloride tetrahydrate, dropwise adding in hydrogen peroxide solution through a peristaltic pump and continuing to stirring the solution for 24 h; then, adding in a certain amount of reducing agent, performing treatment in a thermostatic water bath of 95 DEG C for 12 h; suction-filtering and washing the obtained mixture, and vacuum-drying the washed mixture at 40 DEG C for 12 h to obtain a porous graphene / polypyrrole sample. The prepared porous graphene / polypyrrole sample achieves good effects on the capacitive deionization technology.

Description

technical field [0001] The invention belongs to the field of electrode materials, in particular to a method for preparing a porous graphene / polypyrrole electrode material. Background technique [0002] With the increase of population and the intensification of pollution of fresh water resources, the problem of water shortage is becoming more and more serious. Seawater desalination is an effective way to solve the above problems. Compared with traditional seawater desalination methods such as evaporation, reverse osmosis and other technologies, capacitive deionization technology has the advantages of fast, low energy consumption, and no secondary pollution. Capacitive deionization technology usually uses carbon materials as electrode materials, such as activated carbon, carbon nanotubes, carbon aerogels, etc. However, these conventional carbon materials have disadvantages such as low specific surface area, poor conductivity and capacitance. [0003] As a new type of two-di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469
CPCC02F1/46109C02F1/4691C02F2001/46133
Inventor 马杰王雷陈君红
Owner TONGJI UNIV
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