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A kind of preparation method of graphene

A technology of graphene and graphene solution, applied in the direction of graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of inability to realize large-scale industrial production, insecurity, etc., and achieve industrial production, easy operation, and economical production cost effect

Inactive Publication Date: 2018-03-09
HUIZHOU LONGWAYCAP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Graphene is a two-dimensional carbon atom crystal with a thickness of one atom. It is considered to be the basic structural unit of fullerenes, carbon nanotubes and graphite. Graphene is also widely used in solar cells, sensors, nanoelectronics, high-performance In the fields of nanoelectronic devices, composite materials, field emission materials, gas sensors and energy storage, graphene has a series of excellent properties such as high specific surface area, outstanding thermal conductivity and mechanical properties, and extraordinary electron transfer performance. The great interest of scientific and technological workers, the main methods of preparing graphene are: chemical vapor deposition method, micro-mechanical stripping method and organic molecular dispersion method under liquid phase conditions, ion intercalation method, solvothermal method and redox method, etc. However, the most effective method for preparing graphene in the prior art is the oxidation-reduction method, but this method has certain defects, such as unsafe operation and inability to realize large-scale industrial production, etc.

Method used

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Embodiment 1

[0021] A kind of preparation method of graphene in the present embodiment, comprises the following steps:

[0022] (1) Take 15g of graphite oxide and 25g of hydrogen peroxide solvent and put them into the reaction bottle for mixing, stir rapidly for 30min to form graphite oxide colloid, hydrogen peroxide solvent can provide a better oxidation environment for graphite oxide, and extract higher purity graphene Lay the foundation; (2) add deionized water 20g to the graphite oxide colloid obtained in step (1), put into a hot water bath and carry out heat treatment, carry out stirring simultaneously and carry out ultrasonic dispersion treatment, ultrasonic time is 1h, Forming a graphene oxide solution;

[0023] (3) Add reducing agent in described graphene oxide solution, reducing agent is sodium powder 1g, potassium powder 1g, sodium sulfamate 4g and hydrazine hydrate 4g in the present embodiment, adopts sodium powder, potassium powder to provide a more Good environment, while imp...

Embodiment 2

[0029] A kind of preparation method of graphene in the present embodiment, comprises the following steps:

[0030] (1) Take 15g of graphite oxide and 25g of hydrogen peroxide solvent and put them into the reaction bottle for mixing, stir rapidly for 30min to form graphite oxide colloid, hydrogen peroxide solvent can provide a better oxidation environment for graphite oxide, and extract higher purity graphene Lay the foundation;

[0031] (2) Add 20 g of deionized water to the graphite oxide colloid obtained in step (1), put it into a hot water bath for heat treatment, stir evenly and carry out ultrasonic dispersion treatment at the same time, and the ultrasonic time is 1h to form graphite oxide Alkene solution;

[0032] (3) Add reducing agent in described graphene oxide solution, reducing agent is sodium powder 1g, potassium powder 1g, sodium sulfamate 4g and hydrazine hydrate 4g in the present embodiment, adopts sodium powder, potassium powder to provide a more Good environm...

Embodiment 3

[0035] A kind of preparation method of graphene in the present embodiment, comprises the following steps:

[0036] (1) Take 15g of graphite oxide and 25g of hydrogen peroxide solvent and put them into the reaction bottle for mixing, stir rapidly for 30min to form graphite oxide colloid, hydrogen peroxide solvent can provide a better oxidation environment for graphite oxide, and extract higher purity graphene Lay the foundation;

[0037] (2) Add 20 g of deionized water to the graphite oxide colloid obtained in step (1), put it into a hot water bath for heat treatment, stir evenly and carry out ultrasonic dispersion treatment at the same time, and the ultrasonic time is 1h to form graphite oxide Alkene solution;

[0038] (3) Add reducing agent in described graphene oxide solution, reducing agent is sodium powder 1g, potassium powder 1g, sodium sulfamate 4g and hydrazine hydrate 4g in the present embodiment, adopts sodium powder, potassium powder to provide a more Good environm...

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Abstract

A preparation method of graphene comprises steps as follows: (1) graphite oxide and a hydrogen peroxide solvent are mixed and quickly stirred, and a graphite oxide colloid is formed; (2) deionized water is added to the graphite oxide colloid, the mixture is evenly stirred and subjected to ultrasonic dispersion, and a graphene oxide solution is formed; (3) a reducing agent is added to the graphene oxide solution; (4) the graphene oxide solution with the reducing agent added is subjected to water-bath heating and centrifugation treatment, graphene is obtained, the heated solution is subjected to centrifugation treatment, the obtained graphene is washed with deionized water and then dried, and graphene powder is obtained. The preparation method of the graphene has the advantages of simplicity in operation, high preparation efficiency, capability of facilitating industrial production and the like, and the production cost is effectively saved.

Description

technical field [0001] The invention relates to the technical field of nanometer functional materials, in particular to a method for preparing graphene. Background technique [0002] Graphene is a two-dimensional carbon atom crystal with a thickness of one atom. It is considered to be the basic structural unit of fullerenes, carbon nanotubes and graphite. Graphene is also widely used in solar cells, sensors, nanoelectronics, high-performance In the fields of nanoelectronic devices, composite materials, field emission materials, gas sensors and energy storage, graphene has a series of excellent properties such as high specific surface area, outstanding thermal conductivity and mechanical properties, and extraordinary electron transfer performance. The great interest of scientific and technological workers, the main methods of preparing graphene are: chemical vapor deposition method, micro-mechanical stripping method and organic molecular dispersion method under liquid phase c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01B2204/32C01P2002/72C01P2002/82C01P2002/84C01P2004/04
Inventor 徐茂龙黄红如
Owner HUIZHOU LONGWAYCAP TECH