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Preparation method of simple and environment-friendly few layer graphene

A technology of oligolayer graphite and graphite, which is applied in the field of simple and environment-friendly preparation and oligolayer graphene, can solve the problems of product inhomogeneity, difficult treatment, waste acid, etc., and achieve the effect of uniform reaction and consistent product peeling

Inactive Publication Date: 2017-07-07
青岛岩海碳材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Common top-down methods for preparing oligolayer graphene include the following: 1. Represented by the Hummers method, oxidative intercalation exfoliation of graphite with potassium permanganate and concentrated sulfuric acid is used to prepare oligolayer graphene. This method can be mass-produced , but there will be a lot of waste acid, which will pollute the environment very much, and there are a lot of metal ions in the prepared graphene, and the subsequent treatment is difficult
Second, the mechanical exfoliation method, which can produce ultra-high-quality atomic-layer-thick graphene but has a low yield
Three, the method of ultrasonic peeling, or adding other surfactants together with ultrasonic peeling, this method takes a long time and the product obtained is not uniform, and the yield is low

Method used

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  • Preparation method of simple and environment-friendly few layer graphene
  • Preparation method of simple and environment-friendly few layer graphene
  • Preparation method of simple and environment-friendly few layer graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of oligolayer graphene:

[0022] (1) Commercial graphite powder, hydrogen peroxide (30%), and water are stirred and mixed uniformly; in the mixed solution, the mass ratio of graphite powder and water is 1%, and the volume ratio of hydrogen peroxide and water is 10%;

[0023] (2) Put the mixed solution into the reaction kettle, and react at 180° C. for 24 hours to obtain the described oligolayer graphene aqueous solution, and obtain oligolayer graphene powder after freeze-drying;

[0024] figure 1 It is an optical photograph of an aqueous solution of oligolayer graphene, and it can be seen that the resulting oligolayer graphene has good dispersion. figure 2 It is a scanning electron microscope (SEM) picture of the raw material commercial graphite powder. It can be seen that the lamellar accumulation in the commercial graphite powder is serious. image 3 It is the scanning electron microscope (SEM) picture of the oligolayer graphene prepared in Example 1, a...

Embodiment 2

[0026] Preparation of oligolayer graphene:

[0027] (1) Commercial graphite powder, hydrogen peroxide (30%), and water are stirred and mixed uniformly; in the mixed solution, the mass ratio of graphite powder and water is 1%, and the volume ratio of hydrogen peroxide and water is 1%;

[0028] (2) Put the mixed solution into the reaction kettle, and react at 180° C. for 24 hours to obtain the described oligolayer graphene aqueous solution, and obtain oligolayer graphene powder after freeze-drying;

Embodiment 3

[0030] Preparation of oligolayer graphene:

[0031] (1) Commercial graphite powder, hydrogen peroxide (30%), and water are uniformly mixed; in the mixed solution, the mass ratio of graphite powder to water is 0.1%, and the volume ratio of hydrogen peroxide to water is 10%;

[0032] (2) Put the mixed solution into the reaction kettle, and react at 180° C. for 24 hours to obtain the described oligolayer graphene aqueous solution, and obtain oligolayer graphene powder after freeze-drying;

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Abstract

The invention discloses a simple and environment-friendly preparation method of oligolayer graphene. The method comprises: mixing graphite, hydrogen peroxide and water and performing hydrothermal reaction to obtain the oligolayer graphene. The preparation method of the present invention has the advantages of simple process, convenient operation, environmental friendliness, cheap and easy-to-obtain reaction materials, and can effectively reduce the preparation cost of the multilayer graphene.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and more specifically relates to a simple and environment-friendly preparation method of oligolayer graphene. Background technique [0002] Single-layer or few-layer graphene has ultra-high specific surface area, excellent electrical conductivity and good chemical inertness, so it has a wide range of applications in energy storage and conversion, chemical catalysis and other fields. The preparation of single-layer or few-layer graphene has become a hot spot in scientific research and industry. [0003] Common top-down methods for preparing oligolayer graphene include the following: 1. Represented by the Hummers method, oxidative intercalation exfoliation of graphite with potassium permanganate and concentrated sulfuric acid is used to prepare oligolayer graphene. This method can be mass-produced , but there will be more waste acid produced, which will cause great environmental pollution, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19
CPCC01B2204/02C01P2004/01C01P2004/03
Inventor 王苏成张勇
Owner 青岛岩海碳材料有限公司
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