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Method for batch production of graphene powder through laser reduction

A graphene powder, mass production technology, applied in the direction of graphene, nano-carbon, etc., can solve the problem of only producing graphene film, etc., and achieve the effects of reducing the cost of production equipment, high production efficiency, and fast reduction speed

Active Publication Date: 2018-02-02
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the existing laser reduction of graphene can only produce graphene film, the present invention provides a method for batch production of graphene powder by laser reduction

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  • Method for batch production of graphene powder through laser reduction

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Embodiment 1

[0035] The present embodiment provides a kind of method of laser reduction batch production graphene powder, as figure 1 As shown, the method includes the following steps:

[0036] (1) fill up film-like single-layer graphene oxide raw material in the container that bottom moves;

[0037] (2) irradiate the graphene oxide on the top surface of the container with a 5W laser to reduce the graphene oxide to graphene, and the reduction depth is 20 μm;

[0038] (3) Move the bottom of the container upwards so that the graphene obtained by reduction exceeds the surface of the container, and collect it with a mechanical scraper to obtain graphene powder, and repeat steps (2) to (3) to all graphene oxide in the container is restored.

Embodiment 2

[0040] The present embodiment provides a kind of method of laser reduction batch production graphene powder, and described method comprises the following steps:

[0041] (1) fill up powdery double-layer graphene oxide raw material in the container that bottom moves;

[0042] (2) irradiate the graphene oxide on the top surface of the container with a 10W laser to reduce the graphene oxide to graphene, and the reduction depth is 30 μm;

[0043] (3) Move the bottom of the container upwards so that the graphene obtained by reduction exceeds the surface of the container, and collect it with an air flow to obtain graphene powder, and repeat steps (2) to (3) to all graphene oxide in the container. reduction.

Embodiment 3

[0045] The present embodiment provides a kind of method of laser reduction batch production graphene powder, and described method comprises the following steps:

[0046] (1) fill up the airgel-like multilayer graphene oxide raw material in the container moving at the bottom;

[0047] (2) irradiate the graphene oxide on the top surface of the container with a laser of 0.1W to reduce the graphene oxide to graphene, and the reduction depth is 15 μm;

[0048](3) Move the bottom of the container upwards so that the graphene obtained by reduction exceeds the surface of the container, and collect it with an air flow to obtain graphene powder, and repeat steps (2) to (3) to all graphene oxide in the container. reduction.

[0049] Based on the above examples, it can be seen that the present invention uses a layer-by-layer supply reduction method to reduce graphene oxide. The graphene obtained after reduction is powdery, the reduction speed is fast, no reduction waste is generated, low...

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Abstract

The invention provides a method for batch production of graphene powder through laser reduction. The method comprises the following steps: (1) filling a bottom-moving container with a raw material (graphene oxide); (2) irradiating graphene oxide on the top surface of the container with laser to reduce graphene oxide into graphene; and (3) moving the bottom of the container upwards to enable graphene obtained through reduction to exceed the surface of the container, collecting graphene to obtain graphene powder, and repeating the steps (2)-(3) till all graphene oxide in the container is reduced. Graphene oxide is fed layer by layer for reduction, the feeding speed is matched with the reduction depth, graphene obtained after reduction is powdery, and meanwhile, increase of the production cost is controlled as much as possible, and introduction of adverse factors is also controlled.

Description

technical field [0001] The invention belongs to the field of graphene production and preparation, and relates to a graphene powder reduction method, in particular to a laser reduction method for batch production of graphene powder. Background technique [0002] In recent years, graphene materials have received more and more attention due to their excellent properties in many aspects such as electrical conductivity, thermal conductivity, and mechanical strength. However, the production and preparation of graphene is still a big problem, which leads to the high cost of graphene. Compared with methods such as chemical vapor deposition, mechanical exfoliation and epitaxial growth, chemical exfoliation provides a possible method for producing graphene in large quantities at low cost. The graphene prepared by this method is a graphene oxide material, so further reduction is required to obtain Graphene. Conventional reduction methods include chemical reduction and high-temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
Inventor 徐保民唐俊钟熊伟
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA