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A kind of graphene preparation method, graphene and preparation system thereof

A preparation system, graphene technology, applied in the direction of graphene, chemical instruments and methods, nano-carbon, etc., can solve the problems that affect the large-scale development and application of graphene, increase the internal defects of graphene, and the crystal structure is easy to be destroyed. Achieve the effect of mass production, less structural defects, and simple setup

Active Publication Date: 2021-05-04
SICHUAN JUCHUANG SHIMOXI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the graphene prepared by this method, because its own crystal structure is easily destroyed in the process of oxidative intercalation, leads to the increase of internal defects in graphene, which greatly affects the performance of graphene; On the one hand, there are a lot of metal and non-metal impurities in graphene produced by redox method, which further affects the large-scale development and application of graphene.

Method used

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  • A kind of graphene preparation method, graphene and preparation system thereof

Examples

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preparation example Construction

[0029] One aspect of the present invention provides a kind of graphene preparation method, in an exemplary embodiment of graphene preparation method of the present invention, described preparation method can comprise:

[0030] The raw material is graphene oxide containing oxygen-containing functional groups and metal impurities and / or non-metal impurities, which is added into the reaction zone for reaction to obtain graphene. The graphene oxide passes through the reaction zone by its own gravity. The reaction zone can be configured with a temperature above 1250° C. and a pressure of 30 Pa to 500 Pa.

[0031] In this embodiment, the metal impurities may include one or a combination of iron, manganese, potassium, sodium and the like. The non-metallic impurities may include one or a combination of impurities such as sulfur and silicon.

[0032] As mentioned above, the metal impurities and non-metal impurities contained in graphene oxide are volatilized in gaseous form under the h...

example 1

[0056] S01: Place graphene oxide containing iron, manganese, potassium, sodium, and silicon impurities on the top of the high-temperature vacuum furnace;

[0057] S02: evacuate the high-temperature vacuum furnace to a pressure of 63Pa;

[0058] S03: Set the temperature of the high-temperature vacuum furnace to 1300° C., put the graphene oxide into the vacuum furnace from the top, drop it by its own gravity and heat it for 600 minutes to obtain graphene.

example 2

[0060] S01: Place graphene oxide containing iron, manganese, potassium, sodium, and silicon impurities on the top of the high-temperature vacuum furnace;

[0061] S02: Vacuumize the high-temperature vacuum furnace to a pressure of 30Pa;

[0062] S03: Set the temperature of the high-temperature vacuum furnace to 2200° C., put graphene oxide into the vacuum furnace from the top, drop it by its own gravity and heat for 300 minutes to obtain graphene.

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Abstract

The invention provides a graphene preparation method, graphene and a preparation system thereof. The preparation method includes: subjecting graphene oxide containing oxygen-containing functional groups and containing metal impurities and / or non-metal impurities to a reaction zone under the action of its own gravity, and the reaction zone is set to a temperature above 1250° C. and a pressure of 30Pa to 500Pa. The preparation system includes a feeding unit, a reaction unit, an atmosphere control unit and a collection unit, and the feeding unit is used for adding graphene oxide to the reaction unit; the reaction unit has a reaction zone extending in a vertical direction, so that the graphene oxide can rely on The self-gravity passes through the reaction zone; the atmosphere control unit is used to control the atmosphere environment of the reaction unit; the collection unit collects graphene. The preparation method of the invention can remove the metal and non-metal impurities in the graphene, simultaneously remove a large number of oxygen-containing functional groups carried by the graphene oxide, and repair the hybrid defects of the graphene oxide. The preparation system is easy to operate.

Description

technical field [0001] The invention relates to the technical field of preparation of new materials, and more specifically, to a method for preparing graphene, graphene and a preparation system thereof. Background technique [0002] In 2004, physicists Andre Heim and Konstantin Novoselov of the University of Manchester first separated single-layer graphene from graphite by mechanical exfoliation, and studied its quasi- Particle properties, and field effect properties. This discovery quickly triggered a graphene research boom all over the world. In just a few years, the research and application of graphene have developed vigorously. [0003] Graphene is a two-dimensional honeycomb network structure composed of carbon atoms. It is a surface material composed of a single layer of carbon atoms that can be directly peeled off from graphite. The arrangement of carbon atoms in graphene is the same as that of graphite. They all belong to the compound hexagonal crystal structure. O...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01B2204/22C01B2204/30C01B2204/32C01B32/184
Inventor 李星刘长虹蔡雨婷漆长席蒋虎南
Owner SICHUAN JUCHUANG SHIMOXI TECH CO LTD