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Graphene and preparation method thereof

A technology of graphene and flake graphite, which is applied in the field of graphene and its preparation, can solve the problems of slow preparation process and poor layering effect, and achieve the effects of fast preparation process, good reduction effect and dispersion effect, and accelerated preparation speed

Active Publication Date: 2018-02-09
肇庆中特能科技投资有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the methods for preparing graphene in the prior art are all slow in the preparation process and have poor delamination effects. Therefore, it is also necessary to develop a new preparation method

Method used

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  • Graphene and preparation method thereof
  • Graphene and preparation method thereof
  • Graphene and preparation method thereof

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preparation example Construction

[0031] The invention provides a preparation method of graphene, which comprises steps in turn: the first flake graphite intercalation treatment; the first microwave pretreatment; the first mechanical refinement; the second intercalation treatment; the second microwave pretreatment Treatment; second mechanical refinement; high-frequency ultrasonic oxidation; microwave low-temperature reduction, the specific steps are as follows.

[0032] 1. The first flake graphite intercalation treatment

[0033] Using flake graphite with a carbon content of 99% as raw material, potassium ferrate, phosphorus pentoxide, concentrated sulfuric acid, concentrated nitric acid and potassium permanganate as oxidant and intercalation agent; flake graphite, potassium ferrate, The mass ratio of phosphorus, concentrated sulfuric acid, concentrated nitric acid and potassium permanganate is 1:4.5:0.30:30:30:0.1;

[0034] Put the raw materials, intercalation agent and oxidant into the reaction kettle, and ...

Embodiment

[0060] The present embodiment provides a method for preparing graphene, which includes steps in turn: the first flake graphite intercalation treatment; the first microwave pretreatment; the first mechanical refinement; the second intercalation treatment; the second microwave Pretreatment; second mechanical refinement; high-frequency ultrasonic oxidation; microwave low-temperature reduction, the specific steps are as follows.

[0061] 1. The first flake graphite intercalation treatment

[0062] Using flake graphite with a carbon content of 99% as raw material, potassium ferrate, phosphorus pentoxide, concentrated sulfuric acid, concentrated nitric acid and potassium permanganate as oxidant and intercalation agent; flake graphite, potassium ferrate, The mass ratio of phosphorus, concentrated sulfuric acid, concentrated nitric acid and potassium permanganate is 1:4.5:0.30:30:30:0.1;

[0063] Put the raw materials, intercalation agent and oxidant into the reaction kettle, and rea...

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Abstract

The invention relates to graphene and a preparation method thereof. The preparation method comprises the following sequential steps: first intercalation treatment of flake graphite; first microwave pretreatment; first mechanical refining; second intercalation treatment; second microwave pretreatment; second mechanical refining; high-frequency ultrasonic oxidation; microwave low-temperature reduction. A novel, cheap and non-toxic Fe-series oxidizing agent is taken as the oxidizing agent, so that the graphene preparation process is fast, the layering effect is good, the layering speed is high, layering spacing is large, and prepared graphene contains sufficient oxygen-containing functional groups and is low in cost, pollution-free and applicable to large-scale industrial preparation; prepared graphene has good reduction effect and dispersion effect.

Description

technical field [0001] The invention relates to the technical field of graphene preparation, in particular to a graphene and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional crystal that is exfoliated from graphite material and composed of carbon atoms with only one layer of atomic thickness. In 2004, physicists Andre Geim and Konstantin Novoselov of the University of Manchester successfully separated graphene from graphite, confirming that it can exist alone. Graphene is both the thinnest material and the strongest, with a breaking strength 200 times stronger than the best steel. At the same time, it has good elasticity, and the stretching range can reach 20% of its own size. It is currently the thinnest and strongest material in nature. The most potential application of graphene at present is to become a substitute for silicon, to manufacture ultra-miniature transistors, and to produce future supercomputers. Replace silicon with...

Claims

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Application Information

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IPC IPC(8): C01B32/19
CPCC01B2204/04
Inventor 何可立何幸华李政文高明
Owner 肇庆中特能科技投资有限公司
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