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Method for preparing graphene through hypergravity technology

A hypergravity method and graphene technology, which is applied in the field of hypergravity method to prepare high-performance graphene with graphite as raw material, and achieves the effects of high production safety, environmental friendliness and good controllability.

Active Publication Date: 2015-06-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been no examples of applying hypergravity technology to the field of graphite

Method used

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  • Method for preparing graphene through hypergravity technology
  • Method for preparing graphene through hypergravity technology
  • Method for preparing graphene through hypergravity technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of method that supergravity method prepares graphene, comprises the following steps:

[0039] use figure 1 device.

[0040] 1) Weigh 3g of natural graphite, use the Hummers method or improved Hummers, control the oxidation time and the amount of oxidant, and filter and wash to prepare weakly oxidized graphite (W-GO);

[0041] 2) Dilute the weakly oxidized graphite with water to 1000ml, add 5wt% polyvinylpyrrolidone PVP, stir it magnetically for 2 hours, then add it to a high-gravity rotating bed, add circulating water at 25°C, and peel it off for 10 hours;

[0042] 3) The exfoliated W-GO was reduced with vitamin C in a high-gravity rotating bed, the reduction temperature was 80°C, the reduction time was 1h, washed and filtered to obtain graphene.

Embodiment 2

[0052] Same as Example 1, except that the internal circulating rotating bed device is replaced by an external circulating rotating bed device.

Embodiment 3

[0054] Same as Example 1, except that the graphite is microcrystalline graphite, the exfoliation time is 30 min, the reducing agent is glucose, the reduction temperature is 60 degrees Celsius, and the reduction time is 10 h.

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Abstract

The invention discloses a method for preparing graphene through a hypergravity technology. The method comprises the following steps: carrying out pretreatment on graphite to increase the interlayer spacing of graphite, and peeling pretreated graphite in a hypergravity rotating bed to obtain graphene. The preparation method has the advantages of simplicity, easy implementation, low cost, high output, suitableness for large scale production, and wide application prospect. Graphene prepared through the method has very high conductivity and extremely few defects.

Description

technical field [0001] The invention belongs to the technical field of graphene preparation, and in particular relates to a method for preparing high-performance graphene by using graphite as a raw material by a supergravity method. Background technique [0002] Graphene is the only two-dimensional free-state atomic crystal discovered so far. It is the basic structural unit of carbon materials such as graphite, carbon nanotubes, and fullerenes. It has excellent electrical conductivity, thermal conductivity, high strength, high transparency and Super large specific surface area and good biocompatibility have good application effects and prospects in the fields of composite materials, electronic devices, electrical energy storage devices, biosensors, catalyst carriers, etc. It is one of the hottest research fields at present, and there are also a lot of potential demand. Realizing its high-performance, low-cost and large-scale preparation is the premise and guarantee of its a...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 陈建峰白苗苗毋伟赵一博沈嵩王洁欣
Owner BEIJING UNIV OF CHEM TECH
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