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Preparation method of graphene

A technology of graphene and intercalated graphite, which is applied in the field of graphene prepared by ionic pyrolysis of organic acid intercalated graphite, which can solve the problems of poor performance and low output of graphene, and achieve simple equipment, concentrated layers, and complete crystal structure Effect

Inactive Publication Date: 2013-10-23
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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Problems solved by technology

[0003] At present, the method of preparing graphene mainly adopts the chemical vapor deposition method, and the graphene prepared by it is of high quality, but the output is small and the performance of graphene is poor.

Method used

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preparation example Construction

[0012] A kind of graphene preparation method that present embodiment provides, such as figure 1 shown, including the following steps:

[0013] S1. Introduce a protective gas with a flow rate of 100-1000 sccm into the reactor of the plasma equipment, and remove the air in the reactor, and keep the ventilation time for 5-10 minutes, so that the reactor is a protective atmosphere;

[0014] S2. Set the flow rate of the protective gas flow to 50-100 sccm, then turn on the plasma equipment, adjust the power to 500-1000W, and generate plasma in the reactor;

[0015] S3. Add organic acid intercalated graphite into the reactor at a rate of 10 to 100 g / min through the pipeline. Under the action of plasma, the organic acid intercalated graphite undergoes thermal cracking reaction for 0.1 to 0.5 s. After the reaction is completed, prepare Get graphene.

[0016] In the above-mentioned method for preparing graphene, preferably:

[0017] In step S1, the protective gas is at least one of n...

Embodiment 1

[0024] 1. Pass argon gas with a gas flow rate of 500 sccm into the reactor and keep it for 5 minutes to make it full of the reactor;

[0025] 2. Set the argon gas flow rate to 50 sccm, and then turn on the microwave plasma equipment with a power of 500W to generate microwave plasma in the reactor;

[0026] 3. Add formic acid intercalated graphite into the reactor at a rate of 100g / min through the pipeline, and make it stay in the reactor for 0.1s to stop the reaction;

[0027] 4. Cool the reactor to room temperature under an argon atmosphere to obtain graphene.

[0028] figure 1 For the graphene SEM picture that embodiment 1 prepares; From figure 1 It can be seen from the figure that graphene presents a thin sheet morphology with a thickness of about 1-2 nm, that is, 3-6 layers, which belongs to the range of graphene thickness.

Embodiment 2

[0030] 1. Into the reactor, feed nitrogen gas with a gas flow rate of 1000 sccm and keep it for 10 minutes to make it full of the reactor;

[0031] 2. Set the flow rate of nitrogen gas to 80 sccm, then turn on the radio frequency plasma equipment with a power of 1000W to generate radio frequency plasma in the reactor;

[0032] 3. Add acetic acid intercalated graphite into the reactor at a rate of 50g / min through the pipeline, and make it stay in the reactor for 0.5s to stop the reaction;

[0033] 4. Cool the reactor to room temperature under a nitrogen atmosphere to obtain graphene.

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Abstract

The invention belongs to the field of graphene, and discloses a preparation method of graphene, which comprises the following steps: introducing protective gas into a reactor of plasma equipment; starting the plasma equipment to generate plasma in the reactor; and adding organic acid intercalated graphite into a reactor, and carrying out pyrolysis reaction under the action of plasma to obtain the graphene. By using the method for preparing the graphene by quickly pyrolyzing organic acid intercalated graphite, the prepared graphene has the advantages of fewer defects and complete crystal structure, and is free of sulfur, chlorine and other corrosive elements; and meanwhile, the invention has the advantages of favorable stripping effect, centralized number of layers, simple equipment, and simple and feasible operation, and can easily implement automatic and industrial production.

Description

technical field [0001] The invention relates to a method for preparing graphene, in particular to a method for preparing graphene by using plasma pyrolysis of organic acid intercalated graphite. Background technique [0002] After its discovery in 1841, intercalated graphite has been extensively and in-depth researched on its properties and applications. Because it maintains the good properties of graphite and has some unique properties, it can be used in conductors, superconductors, batteries and other fields. Graphene is a two-dimensional carbon atom crystal discovered by Andre K. Geim of the University of Manchester in 2004; due to its unique structure and photoelectric properties, graphene has become a carbon material, nanometer Research hotspots in the fields of technology, condensed matter physics and functional materials have attracted many scientific and technological workers. [0003] At present, the method for preparing graphene mainly adopts the chemical vapor de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/19
Inventor 周明杰袁新生王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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