Method for preparing graphene by alkali metal intercalation

A technology of alkali metals and graphene, applied in the direction of graphene, non-metallic elements, chemical instruments and methods, etc., can solve the problems of limiting the application field of graphene, increasing production costs, slow growth speed, etc., and achieves fast and efficient preparation methods, The effect of less pollution and high single-layer rate

Inactive Publication Date: 2019-10-22
BEIHANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

The bottom-up growth method, such as the traditional chemical vapor deposition method, but the growth of graphene by the chemical vapor deposition method requires a harsh growth environment, such as high temperature and high vacuum, and a catalyst needs to be added during the deposition process Catalytic growth consumes a lot of energy during the growth process. In addition, the growth rate of this method is slow and the production cost is greatly increased, which greatly limits the application fields of this typ

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  • Method for preparing graphene by alkali metal intercalation
  • Method for preparing graphene by alkali metal intercalation
  • Method for preparing graphene by alkali metal intercalation

Examples

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Effect test

Embodiment 1

[0034] (1) Mix graphite powder and metal lithium in an inert environment of argon with a mass ratio of 6:1, first melt the lithium by heating, then add graphite powder and stir and mix until the graphite powder and metal lithium are evenly mixed and then place After being placed in an inert atmosphere for 24 hours, the above mixture turns golden yellow (attached figure 1 );

[0035] (2) Take the above golden composite material out of the inert environment and put it into ethanol (analytical pure), the intercalation metal reacts with ethanol quickly to generate gas, and the composite material expands rapidly and is dispersed in ethanol. After the reaction was completed, the solution was ultrasonically treated for one hour, then the solution was washed repeatedly, and the graphene material was obtained by suction filtration and separation.

[0036] The XRD diffraction pattern of the material is attached figure 2 , analysis available golden material is alkali metal intercalate...

Embodiment 2

[0038] (1) Mix graphite flakes and lithium metal in an inert environment of argon with a mass ratio of 5:1, fold and roll repeatedly until the graphite flakes and lithium metal are evenly mixed and then placed in an inert atmosphere for 48 hours. The above mixture turns golden yellow;

[0039] (2) The above golden yellow composite material was taken out from the inert environment, and put into 0.1mol / L hydrochloric acid aqueous solution, the intercalation metal quickly reacted with the solution to generate gas, and the composite material rapidly expanded and dispersed in the hydrochloric acid aqueous solution. After the reaction was completed, the solution was ultrasonically treated for one hour, then the solution was washed repeatedly, and the graphene material was obtained by suction filtration and separation.

Embodiment 3

[0041] (1) Mix expanded graphite and metal lithium in an inert environment argon with a mass ratio of 3:1, fold and roll repeatedly until the flake graphite and metal lithium are evenly mixed and then placed in an inert atmosphere for 48 hours. The above mixture turns golden yellow;

[0042] (2) Take the above golden composite material out of the inert environment and put it into acetic acid (analytical pure), the intercalation metal reacts with acetic acid quickly to generate gas, and the composite material expands rapidly and is dispersed in acetic acid. After the reaction was completed, the solution was ultrasonically treated for one hour, then the solution was washed repeatedly, and the graphene material was obtained by suction filtration and separation.

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Abstract

The invention provides a method for preparing graphene by alkali metal intercalation. The method comprises the following steps that (1) in an inert environment, a graphene material is mixed with alkali metal to obtain an evenly-mixed graphene carbon material-alkali metal composite material, still standing is conducted in the inert environment, and thus metal intercalation reaction is produced; and(2) the obtained composite material is put in a liquid medium reacting with the composite material to react, an intercalation object is removed, and the graphene material is obtained through vibration, washing and separating. The invention further provides the graphene prepared through the method. According to the preparation method of the high-quality graphene, a golden yellow composite materialobtained through lithium or other highly-reactive alkali metal mixed and reacted with the graphene material is adopted to serve as a precursor, the later stage preparation process of the graphene canbe conducted under condition of room temperature, air and the like, and the method is suitable for large-scale preparation of the graphene.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, and in particular relates to a preparation method of graphene. Background technique [0002] Graphene has excellent material properties, including a huge specific surface area, high Young's modulus, electron mobility, and ultra-high thermal conductivity. Graphene consists of monolayer sp 2 Composed of hybrid carbon atoms, it is the thinnest and hardest nano-carbon material known so far, and it is almost completely transparent, light in weight, has excellent flexibility and super thermal conductivity, and is used in energy storage, catalysis, Composite materials and other fields have a wide range of applications. [0003] At present, the production and preparation methods of graphene mainly include top-down method and bottom-up method. The bottom-up growth method, such as the traditional chemical vapor deposition method, but the growth of graphene by the chemical vapor deposition...

Claims

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Application Information

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IPC IPC(8): C01B32/19
CPCC01B2204/04C01B2204/32C01P2004/03C01P2004/04C01B32/182C01B32/19
Inventor 李彬杨树斌
Owner BEIHANG UNIV
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