Method for preparing graphene powder by using dry process

A technology of graphene powder and graphite, which is applied in the field of dry preparation of graphene powder

Inactive Publication Date: 2014-07-16
NANJING XINYUE MATERIAL SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The redox graphite method has a simple and diversified process, and is a commonly used method for preparing graphene. However, this method is only suitable for a small amount of preparation in the laboratory for research, and a large amount of preparation is easy to produce a large amount of waste acid and waste water. etc. will cause environmental pollution

Method used

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  • Method for preparing graphene powder by using dry process
  • Method for preparing graphene powder by using dry process
  • Method for preparing graphene powder by using dry process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The prepared samples were characterized by TEM, Raman spectroscopy and AFM, and the results were as follows: figure 1 , figure 2 and image 3 shown, from figure 1 It can be seen that at 1351.79cm -1 D peak appears at 1600.98cm -1 G peak appears at , which shows that the inventive method can prepare graphene; from figure 2 and image 3 It can be clearly seen that the prepared graphene has a gauze-like translucent sheet structure and a wrinkled surface.

[0017] Example 2

Embodiment 2

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Abstract

The invention belongs to the technical field of nanometer material preparation and particularly relates to a method for preparing graphene powder by using a dry process. The method comprises the steps of firstly, carrying out microwave heat treatment on graphite to form pre-expanded graphite; placing pre-expanded graphite into a high-pressure-resistant peeling reactor, and adding dry ice or liquid nitrogen to peel at high pressure and high speed to obtain graphene. The method for preparing the graphene powder is simple in production equipment, few in process flow, free of oxidation reduction and subsequent acid treatment processes, environment-friendly and suitable for large-scale production; the prepared graphene powder is few in defect, good in conductivity and suitable for the application fields such as supercapacitors, sensors, sea water desalination and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer materials, and in particular relates to a method for preparing graphene powder by a dry method. technical background [0002] Since the discovery of graphene in 2004, many scientists have devoted themselves to the research of graphene preparation methods, especially the method for preparing graphene with high quality, high yield, low cost and stable structure. At present, there are mainly the following methods for preparing graphene: exfoliation method, including micromechanical exfoliation method and solvent exfoliation method; Methods, including the commonly used Hummers method, Standenmaier method, Brodie method, etc.; in addition, there are arc discharge method, graphite interlayer chemical pathway method, carbon nanotube peeling method, etc. The redox graphite method has a simple and diversified process, and is a commonly used method for preparing graphene. However, this met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/19
CPCY02P20/54
Inventor 闵永刚刘屹东杨文斌张乐乐宋建军
Owner NANJING XINYUE MATERIAL SCI & TECH
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