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Graphene preparation method

A graphene and reaction medium technology, applied in the field of graphene preparation, can solve the problems of poor safety, complex process, high reaction temperature, etc., and achieve the effect of low price, environmental friendliness, benefit to the environment and the protection of operators

Inactive Publication Date: 2012-07-04
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of complex graphene preparation process, poor safety and high reaction temperature in the prior art and provide a preparation method of graphene

Method used

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Experimental program
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Effect test

Embodiment 1

[0024] Prepare an aqueous solution containing graphene oxide (GO), the concentration of GO is 0.01mg / ml, add 0.1ml methyl silicone oil dropwise, and reflux the reaction until the black substance no longer precipitates. Finally, the solvent is removed by liquid separation and evaporation to obtain graphene.

Embodiment 2

[0026] Prepare a water and ethanol solution containing graphene oxide, the concentration of GO is 10mg / ml, the volume ratio of water and ethanol is 50:1, add 0.1ml of ethyl silicone oil dropwise, and reflux until the black substance no longer precipitates, and finally through liquid separation , and the solvent was evaporated to obtain graphene.

Embodiment 3

[0028] Prepare a water and methanol solution containing graphene oxide, the concentration of GO is 0.07mg / ml, the volume ratio of water and methanol is 30:1, and the reaction is refluxed until the black substance no longer precipitates, and finally the solvent is evaporated to obtain graphene.

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Abstract

The invention discloses a graphene preparation method. The method comprises dispersing graphene oxide in one or two of the following substances: water, ethanol, phenol and organic acid; carrying out normal-pressure reflux reaction in the presence of a reaction medium or not; stopping reaction until a black substance is not separated out; and separating and purifying the product to obtain graphene. The preparation method is green, safe, simple, energy-saving and so on, and can be applied in the fields of graphene and related products, such as transistor, touch screen, gene sequencing, fuel battery, and super capacitor.

Description

technical field [0001] The invention relates to a method for preparing graphene. Background technique [0002] Graphene (Graphene) refers to a kind of flakes arranged in a hexagonal ring between carbon atoms. It is composed of a layer of carbon atoms and can extend infinitely in two-dimensional space. , which is considered to be the thinnest material in the universe and the strongest material ever created. [0003] In 2004, Andre Geim and Konstantin Novoselov, winners of the 2010 Nobel Prize in Physics, used the method of mechanical exfoliation for the first time to successfully exfoliate graphite layers to obtain independent single-layer or multi-layer graphite. layers of graphene. Graphene with a two-dimensional structure has excellent electronic properties. It is reported that graphene is the material with the best electrical conductivity known so far. Some experts pointed out that if micro-transistors are made of graphene, the computing speed of computers will be great...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/184
Inventor 王廷梅李裕琪王齐华
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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