Method for preparing high-specific surface area graphene material by utilizing strong base chemical treatment

A high specific surface area, chemical treatment technology, applied in the field of graphene material production by chemical treatment, can solve the problems of restricting the application of graphene materials, low theoretical specific surface area of ​​graphene, etc., and achieve high conductivity and increase the specific surface area.

Active Publication Date: 2011-05-25
THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​the graphene powders obtained by these methods are all in the range of 1000 m 2 Below / g, generally less than 700 m 2 / g, much lower than the theoretical specific surface area of ​​graphene
This technical bottleneck restricts the further application of graphene materials

Method used

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  • Method for preparing high-specific surface area graphene material by utilizing strong base chemical treatment
  • Method for preparing high-specific surface area graphene material by utilizing strong base chemical treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Utilize the method for potassium hydroxide modified graphene material, comprise following preparation steps:

[0021] 1. Weigh 11.2g of pure potassium hydroxide particles and place them in an alumina beaker, add 20ml of deionized water to obtain a 20mol / L potassium hydroxide aqueous solution;

[0022] 2. Weigh 0.224g of graphite oxide particles and place them in a glass beaker, add 2.24L of deionized water, and use a needle-shaped ultrasonic device to sonicate for 3 hours to obtain a 0.1g / L graphite oxide suspension;

[0023] 3. Pour the potassium hydroxide solution obtained in step 1 into the graphite oxide suspension obtained in step 2, place on a magnetic stirring plate and stir for 30 minutes at a speed of 1000 rpm;

[0024] 4. Pour the condensate obtained in step 3 into a vacuum filter device, and open the vacuum valve for suction filtration; until no water drips down;

[0025] 5. Put the substance obtained in step 4 into a vacuum oven, pump the vacuum to the limi...

Embodiment 2

[0034] Utilize the method for potassium hydroxide modified graphene material, comprise following preparation steps:

[0035] 1. Weigh 0.112g of pure potassium hydroxide particles and place them in an alumina beaker, add 20ml of deionized water to obtain a 0.2mol / L potassium hydroxide aqueous solution;

[0036] 2. Weigh 0.1g of graphite oxide particles and place them in a glass beaker, add 0.01L of deionized water, and use a needle-shaped ultrasonic device to sonicate for 1 hour to obtain a 10g / L graphite oxide suspension;

[0037] 3. Pour the potassium hydroxide solution obtained in step 1 into the graphite oxide suspension obtained in step 2, place on a magnetic stirring plate and stir for 30 minutes at a speed of 200 rpm;

[0038] 4. Pour the condensate obtained in step 3 into a vacuum filter device, and open the vacuum valve for suction filtration; until no water drips down;

[0039] 5. Put the substance obtained in step 4 into a vacuum oven, pump the vacuum to the limit, ...

Embodiment 3

[0048] Utilize the method for sodium hydroxide modified graphene material, comprise following preparation steps:

[0049]1. Weigh 5.6g of pure sodium hydroxide particles and place them in an alumina beaker, add 20ml of deionized water to obtain a 10mol / L potassium hydroxide aqueous solution;

[0050] 2. Weigh 1g of graphite oxide particles and place them in a glass beaker, add 0.2L of deionized water, and use a needle-shaped ultrasonic device to sonicate for 3 hours to obtain a 5g / L graphite oxide suspension;

[0051] 3. Pour the sodium hydroxide solution obtained in step 1 into the graphite oxide suspension obtained in step 2, place on a magnetic stirring plate and stir for 30 minutes at a speed of 1000 rpm;

[0052] 4. Pour the condensate obtained in step 3 into a vacuum filter device, and open the vacuum valve for suction filtration; until no water drips down;

[0053] 5. Put the substance obtained in step 4 into a vacuum oven, pump the vacuum to the limit, set the tempera...

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Abstract

The invention relates to a method for preparing a high-specific surface area graphene material by utilizing strong base chemical treatment and belongs to the technical field of preparation of graphene materials. By reacting strong base with carbon at high temperature to further perform chemical treatment on graphene powder obtained through thermal treatment or microwave irradiation, nano-scale micropores are rapidly and massively corroded on the surface of graphene, and the specific surface area is greatly improved. Meanwhile, the graphene can be reduced through high-temperature treatment; therefore, high conductivity of the obtained material is guaranteed.

Description

technical field [0001] The invention relates to a method for producing graphene materials by chemical treatment, and belongs to the technical field of graphene material preparation. Background technique [0002] Graphene, English name Graphene, is a two-dimensional lattice structure in which carbon atoms are arranged in a hexagonal manner. As a single-layer carbon-atom planar material, graphene can be obtained by exfoliating graphite materials. Graphene has become the focus of scientific and industrial attention since the graphite crystal film was discovered by scientists at the University of Manchester in 2004. The thickness of graphene is only 0.335 nanometers, which is not only the thinnest among known materials, but also very firm and hard; as a simple substance, it transfers electrons faster than all known conductors and semiconductors at room temperature (graphene Electrons move at 1 / 300 the speed of light). Due to the special atomic structure of graphene, the behav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
CPCC01B31/0446C01B2204/32C01B31/043B82Y40/00B82Y30/00C01B32/184C01B32/23
Inventor 瞿研
Owner THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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