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Preparation of graphene

A technology of graphene and halogenated hydrocarbons, which is applied in the field of chemical synthesis, can solve the problems of large graphene structure damage, complicated steps, and low efficiency, and achieve the effects of low raw material cost, simple equipment, and low energy consumption

Inactive Publication Date: 2009-06-24
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has low efficiency, small output and high cost, so it can only be limited to laboratory production
However, the steps of the thermal expansion graphite method are complicated, and the graphene structure is greatly damaged.

Method used

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  • Preparation of graphene

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1 - the preparation of graphene

[0042] The device used in the preparation of graphene in this embodiment includes: three-necked grinding bottle (250mL, reaction kettle), spherical condenser, electric heating mantle, high-purity nitrogen cylinder (providing nitrogen), capillary glass tube, thermometer sleeve, rubber tube and thermometer (0-400°C).

[0043]The specific method of the method that present embodiment prepares graphene comprises the following steps:

[0044] 1. Synthesis of graphene

[0045] First dry the three-necked bottle with ground mouth in an oven, add 50mL of paraffin oil to it, wipe off the impurities on the surface of the sodium metal, then place it on a watch glass and weigh 2.0g of sodium with a balance, put it directly into the three-necked bottle, add 1.0mL tetrachlorethylene, stir evenly; then connect the thermometer with the thermowell, and plug it into a bottle mouth on the side of the three-necked bottle. One end of the tube is...

Embodiment 2

[0053] Embodiment 2 - the preparation of graphene

[0054] Graphene is prepared with the experimental device identical with embodiment 1, and concrete preparation method comprises the following steps:

[0055] 1. Synthesis of graphene

[0056] Add 50mL of diphenyl ether into the dried ground three-neck bottle, wipe off the impurities on the surface of metallic sodium, then place it on a watch glass and weigh 2.3g (0.1 mole) of sodium with a balance, and put it directly into the three-necked bottle , add tetrachlorethylene 0.016g (0.001 mole), stir evenly; 2 5min, then, switch on the cooling water of the spherical condenser connected to the there-necked flask, start heating the there-necked flask with an electric heating mantle, and at the same time stir the system at a slow speed so that the sodium can be stirred as a whole, and heat to 160°C (the temperature is regulated by controlling the power of the electric heating mantle), and the reaction is stopped after maintaining...

Embodiment 3

[0060] Embodiment 3 - the preparation of graphene

[0061] The device used in the preparation of graphene in this embodiment includes: three-necked grinding bottle (250mL, reaction kettle), spherical condenser, electric heating mantle, high-purity nitrogen cylinder (providing nitrogen), capillary glass tube, thermometer sleeve, rubber tube And thermometer (0-400°C), bubbling device. Concrete preparation method comprises the following steps:

[0062] 1. Synthesis of graphene

[0063] First add 50mL of paraffin oil to the three-neck bottle with ground mouth dried in an oven, wipe off the impurities on the surface of the metallic sodium, then place it on a watch glass and weigh 2.0g of sodium with a balance, and put it directly into the three-necked bottle. Add 2ml of tetrachlorethylene into the bubbling device, open the pressure reducing valve of the nitrogen bottle, and blow nitrogen gas at a speed of about 100 bubbles per minute, then connect the cooling water of the spheric...

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Abstract

The invention discloses a method for preparing graphene, which belongs to the technical field of chemical synthesis. The method is characterized in that sodium metal and halogenated hydrocarbon are taken as raw materials to react in a solvent in inert atmosphere so as to prepare the grapheme; reaction temperature is preferably between 120 and 400 DEG C, and is more preferably between 160 and 360 DEG C; the molar ratio of the sodium metal to the halogenated hydrocarbon is preferably between 1:1 and 100:1, wherein the halogenated hydrocarbon can be added before reaction or during the reaction; and the halogenated hydrocarbon is preferably halogenated C1-4 aliphatic hydrocarbon and halogenated benzene, such as tetrachloroethylene, hexachlorobenzene, trichloroethylene, bromobenzene, ethylenetetrabromide and the like. The method also preferably performs post-treatment on the prepared graphene so as to improve purity. The method has the advantages of simple equipment, easy operation, low cost, high yield and good product properties, can play an important role in the industrial production of graphene and related products such as lithium ion batteries and the like, and is broad in application prospects.

Description

technical field [0001] The invention relates to graphene, in particular to a preparation method of graphene, and belongs to the technical field of chemical synthesis. Background technique [0002] Graphene is a new type of carbon material that has been extensively studied in recent years. It can be viewed as a two-dimensional planar structure made of carbon atoms. The advent of graphene has caused a research boom all over the world. [0003] Graphene's unique structural characteristics have brought it a series of novel and special properties, and it has been a hot research topic for scientists since its discovery. First of all, graphene has a very stable structure, which makes its mechanical properties very good. Graphene is currently the thinnest material. The carbon atoms in graphene are perfectly arranged. When an external force is applied, the surface of the carbon atoms will bend and deform under the action of the external force, so that the carbon atoms do not need ...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 李彦王金泳
Owner PEKING UNIV
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