Method for preparing three-dimensional meso-porous graphene/polyaniline composite material

A technology of three-dimensional mesoporous and composite materials, which is applied in the field of preparation of nanocomposite materials, can solve the problems of limited increase in specific surface area and pore volume, and achieve the effects of high electrical conductivity, high specific surface area and good electrochemical performance.

Inactive Publication Date: 2018-08-03
SHENYANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The three-dimensional porous graphene / polyaniline composite materials prepared by the above-mentioned disclosed methods are mostly macroporous structures, and the specific surface area and pore volume of the composite materials are limited. At present, there is no method for preparing three-dimensional mesoporous graphene / polyaniline composites by hydrothermal reduction combined with alkali activation. In situ polymerization of graphene and aniline to prepare three-dimensional mesoporous graphene / polyaniline composites

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  • Method for preparing three-dimensional meso-porous graphene/polyaniline composite material

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Embodiment 1

[0024] A preparation method of a three-dimensional mesoporous graphene / polyaniline composite material, comprising the following steps:

[0025] Step a: Mix graphene oxide with deionized water and ultrasonically disperse for 1 hour to obtain a graphene oxide dispersion with a concentration of 2 mg / ml; place the graphene oxide dispersion in a polytetrafluoroethylene reactor at 180 °C After hydrothermal reaction for 12 hours, vacuum filtration after cooling, repeated washing with deionized water, and vacuum freeze-drying to obtain three-dimensional graphene.

[0026] Step b: Soak the three-dimensional graphene obtained in step a in potassium hydroxide solution (the mass ratio of three-dimensional graphene to potassium hydroxide is 1:3), ultrasonically disperse for 1 hour, let stand for 24 hours, and freeze-dry in vacuum , activated in a tube furnace at 500 °C for 3 hours under a nitrogen atmosphere, after cooling, washed with 36% acetic acid solution and deionized water to neutra...

Embodiment 2

[0030] A preparation method of a three-dimensional mesoporous graphene / polyaniline composite material, comprising the following steps:

[0031] Step a: Mix graphene oxide with deionized water and ultrasonically disperse for 1 hour to obtain a graphene oxide dispersion with a concentration of 1 mg / ml; place the graphene oxide dispersion in a polytetrafluoroethylene reactor at 180°C After hydrothermal reaction for 24 hours, vacuum filtration after cooling, repeated washing with deionized water, and then vacuum freeze-drying to obtain three-dimensional graphene.

[0032] Step b: Soak the three-dimensional graphene obtained in step a in potassium hydroxide solution (the mass ratio of three-dimensional graphene to potassium hydroxide is 1:2.5), ultrasonically disperse for 1 hour, let stand for 48 hours, and freeze-dry in vacuum , activated in a tube furnace at 500 °C for 5 hours under a nitrogen atmosphere, after cooling, washed with 36% acetic acid solution and deionized water to ...

Embodiment 3

[0035] A preparation method of a three-dimensional mesoporous graphene / polyaniline composite material, comprising the following steps:

[0036] Step a: Mix graphene oxide with deionized water and ultrasonically disperse for 1 hour to obtain a graphene oxide dispersion with a concentration of 0.5 mg / ml; place the graphene oxide dispersion in a polytetrafluoroethylene reactor at 180 °C After hydrothermal reaction for 24 hours, vacuum filtration after cooling, repeated washing with deionized water, and then vacuum freeze-drying to obtain three-dimensional graphene.

[0037] Step b: Soak the three-dimensional graphene obtained in step a in potassium hydroxide solution (the mass ratio of three-dimensional graphene to potassium hydroxide is 1:4), ultrasonically disperse for 1 hour, let stand for 24 hours, and freeze-dry in vacuum , activated in a tube furnace at 500 °C for 2 hours under a nitrogen atmosphere. After cooling, it was washed with 36% acetic acid solution and deionized wat...

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Abstract

The invention relates to a method for preparing a nanocomposite material, and concretely relates to a method for preparing a three-dimensional meso-porous graphene/polyaniline composite material. Themethod comprises the following steps: 1, preparing three-dimensional graphene: mixing graphene oxide with deionized water, performing ultrasonic dispersing to obtain a graphene oxide dispersion, and performing a hydrothermal reaction on the graphene oxide dispersion in a polytetrafluoroethylene reaction vessel to obtain the three-dimensional graphene; 2, preparing three-dimensional meso-porous graphene: immersing the three-dimensional graphene in an alkaline solution, performing vacuum freeze-drying, performing an activation reaction on the dried three-dimensional graphene in a nitrogen or argon atmosphere, washing the obtained reaction product with an acid and deionized water, and drying the washed reaction product to obtain the three-dimensional meso-porous graphene; and 3, preparing thethree-dimensional meso-porous graphene/polyaniline composite material: dispersing the three-dimensional meso-porous graphene in an acidic solution, adding aniline and ammonium persulfate, and performing in-situ polymerization under an ice salt bath condition to obtain the three-dimensional meso-porous graphene/polyaniline composite material. The material can be applied to fields of supercapacitorelectrode materials, energy storage materials and heat conduction materials.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite material, in particular to a preparation method of a three-dimensional mesoporous graphene / polyaniline composite material. Background technique [0002] The agglomeration and stacking of graphene have always affected its application in capacitors. Many researchers have prepared three-dimensional graphene with large specific surface area and porous structure, and combined three-dimensional graphene with polyaniline to form foamy, nanometer Thin films and network structures, etc. to improve the application of graphene in energy storage. The preparation methods of three-dimensional graphene / polyaniline composites are different, and the structures and properties of the obtained composites are also different. At present, the preparation methods mainly include in-situ polymerization, electrochemical polymerization and self-assembly methods. The in-situ polymerization method is to uniformly di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C08K3/04C08K9/02
CPCC08G73/02C08K9/02C08K2201/001C08K3/042
Inventor 侯朝霞赵蓝蔚
Owner SHENYANG UNIV
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