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Preparation method for graphene

A technology of graphene and graphite, which is applied in the field of graphene preparation, can solve problems affecting the quality of graphene products, reduce the degree of reduction of graphite oxide, etc., and achieve the effect of increasing the degree of reduction and improving product quality

Inactive Publication Date: 2017-06-06
衡阳恒荣高纯半导体材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction conditions of the prior art make the low toxicity reducing agent in the preparation process, graphene will produce a large amount of agglomeration, the agglomeration phenomenon reduces the reduction degree of graphite oxide, and affects the product quality of graphene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1

[0022] A kind of preparation method of graphene, comprises the following steps:

[0023] S1: uniformly mix pyridine and formic acid in a volume ratio of 1:4 to obtain a mixed solvent;

[0024] S2: Dispersing graphite oxide in the mixed solvent to obtain a mixed solution, the addition ratio of the graphite oxide to the mixed solvent is 5 mg / ml;

[0025] S3: ultrasonically disperse the mixed solution for 30 minutes;

[0026] S4: Add 0.2ml of methyl silicone oil, and carry out normal pressure reflux reaction until the black substance no longer precipitates, and stop the reflux reaction;

[0027] S5: separating and purifying the product to obtain pretreated graphene;

[0028] S6: coating the pretreated graphene on the substrate, the substrate is aluminum foil;

[0029] S7: performing laser reduction on the substrate provided with the pretreated graphene to obtain the finished graphene.

Embodiment 2

[0031] A kind of preparation method of graphene, comprises the following steps:

[0032] S1: Mix pyridine and formic acid uniformly according to the volume ratio of 1:5 to obtain a mixed solvent;

[0033] S2: Dispersing graphite oxide in the mixed solvent to obtain a mixed solution, the addition ratio of the graphite oxide to the mixed solvent is 7 mg / ml;

[0034] S3: ultrasonically disperse the mixed solution for 40 minutes;

[0035] S4: Add 0.3ml of methyl silicone oil, carry out the reflux reaction at normal pressure, until the black substance no longer precipitates, and stop the reflux reaction;

[0036] S5: separating and purifying the product to obtain pretreated graphene;

[0037] S6: coating the pretreated graphene on the substrate, the substrate being a silicon wafer;

[0038] S7: performing laser reduction on the substrate provided with the pretreated graphene to obtain the finished graphene.

Embodiment 3

[0040] A kind of preparation method of graphene, comprises the following steps:

[0041] S1: uniformly mix pyridine and formic acid in a volume ratio of 1:1 to obtain a mixed solvent;

[0042] S2: Dispersing graphite oxide in the mixed solvent to obtain a mixed solution, the addition ratio of the graphite oxide to the mixed solvent is 6 mg / ml;

[0043] S3: ultrasonically disperse the mixed solution for 35 minutes;

[0044] S4: Add 0.5ml of methyl silicone oil, and carry out normal pressure reflux reaction until the black substance no longer precipitates, and stop the reflux reaction;

[0045] S5: separating and purifying the product to obtain pretreated graphene;

[0046] S6: coating the pretreated graphene on the substrate, the substrate is aluminum foil;

[0047] S7: performing laser reduction on the substrate provided with the pretreated graphene to obtain a finished graphene product.

[0048] The preparation method of graphene provided by the present invention can full...

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Abstract

The invention discloses a preparation method for graphene. The preparation method for graphene comprises the following steps: uniformly mixing pyridine and formic acid according to a volume ratio of 1: 1 to 1: 5 so as to obtain a mixed solvent; dispersing graphite oxide in the mixed solvent so as to obtain a mixed solution, wherein the addition proportion of graphite oxide and the mixed solvent is 5 to 7 mg / ml; subjecting the mixed solution to ultrasonic dispersion for 30 to 40 min; adding 0.2 to 0.5 ml of methyl silicone oil, carrying out a normal-pressure reflux reaction and terminating the reflux reaction when a black substance is not precipitated any longer; subjecting products of the previous step to separation and purification so as to obtain pretreated graphene; coating a substrate with the pretreated graphene; and carrying out laser reduction on the substrate with the pretreated graphene so as to obtain finished graphene. According to the preparation method for graphene in the invention, graphite oxide is fully reduced by a reasonable reducing agent and related technological parameters, so the degree of reduction is improved, and the quality of the produced graphene is enhanced.

Description

technical field [0001] The invention relates to the technical field of graphite, in particular to a method for preparing graphene. Background technique [0002] As a new type of two-dimensional honeycomb structure carbon material, graphene has good electrical conductivity (7200 S / m), large theoretical specific surface area (2600 m 2 / g), high mechanical stability and other superior properties, it has attracted widespread attention. At present, the methods for preparing graphene mainly include: (1) micromechanical exfoliation method, such as Andre et al., University of Manchester, United Kingdom, prepared graphene by adhesive tape method, although this method can obtain high-quality few-layer graphene , but the low yield and cumbersome process limit its use; (2) chemical vapor deposition method, which is to deposit and grow carbon atoms on the substrate to form graphene in a reactor with a catalyst substrate. A large amount of graphene can be produced, but the growth condit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
Inventor 李贺成
Owner 衡阳恒荣高纯半导体材料有限公司
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