Method for continuously preparing graphene

A graphene and purpose technology, which is applied in the field of chemical vapor deposition to prepare graphene, can solve the problems of high cost, enhanced operation complexity of equipment, cannot realize continuous and uninterrupted preparation, etc., achieves simple equipment, realizes automation and industrialized production, The effect of easy automation and industrialized production

Active Publication Date: 2013-05-08
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So people began to use chemical vapor deposition to prepare graphene (Alexander N, Obraztsov. Nature nanotechnology. 2009, 4, 212), but this method is only a small amount of preparation
The Chinese patent application with the publication number CN101285175A discloses a method for preparing graphene film by chemical vapor deposition. In this method, the catalyst needs to be uniformly deposited on the substrate, which will not only introduce unnecessary impurities, but also enhance the operation. The complexity and unnecessary equipment lead to high cost and cannot achieve continuous and uninterrupted preparation

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  • Method for continuously preparing graphene
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Embodiment 1

[0041] A method for continuously preparing graphene, comprising the following steps:

[0042] (1) with deionized water, ethanol and acetone, the copper mesh with an aperture of 50 objects is cleaned successively;

[0043] (2) Set the cleaned copper mesh in the reaction chamber, feed the argon gas with a flow rate of 200 sccm into the reaction chamber, and keep it for 10 minutes; then heat the reaction chamber to 1000 ° C, and feed the methane with a flow rate of 50 sccm , the methane was reacted in the catalytic process of the copper net for 60 minutes to produce graphene, and the graphene was gathered on a stainless steel net with an aperture of 200 mesh;

[0044] (3) Replace the stainless steel mesh and continue to collect graphene;

[0045] (4) Put the stainless steel net with graphene collected in step (3) into deionized water for 10 minutes to ultrasonically vibrate to form a uniformly dispersed suspension, filter the suspension, and dry the filtrate to obtain graphene. ...

Embodiment 2

[0048] A method for continuously preparing graphene, comprising the following steps:

[0049] (1) with deionized water, ethanol and acetone, the aperture is 325 meshes of nickel mesh are cleaned successively;

[0050](2) The cleaned nickel net is arranged in the reaction chamber, and the hydrogen gas of 10 sccm is passed into the reaction chamber for 60 minutes; then the reaction chamber is heated to 750 ° C, and the acetylene of 10 sccm is passed into the gas flow, After the acetylene reacted in the catalytic process of the nickel net for 30 minutes, graphene was obtained, and the graphene was gathered on a copper net with an aperture of 325 mesh;

[0051] (3) replace the copper net and continue to collect graphene;

[0052] (4) putting the copper mesh collected with graphene in step (3) into deionized water and ultrasonically vibrating for 30 minutes to form a uniformly dispersed suspension, filtering the suspension, and drying the filtrate to obtain graphene.

Embodiment 3

[0054] A method for continuously preparing graphene, comprising the following steps:

[0055] (1) with deionized water, ethanol and acetone, the aperture is 200 mesh cobalt nets are cleaned successively;

[0056] (2) Set the cleaned cobalt mesh in the reaction chamber, feed into the reaction chamber a nitrogen gas flow rate of 1000 sccm, and keep it for 3 minutes; then heat the reaction chamber to 1100 ° C, feed the ethylene flow rate of 200 sccm, After the ethylene was reacted for 50 minutes in the catalytic process of the cobalt mesh, graphene was produced, and the graphene was gathered on a copper mesh with an aperture of 325 mesh;

[0057] (3) replace the copper net and continue to collect graphene;

[0058] (4) putting the copper mesh collected with graphene in step (3) into deionized water and ultrasonically vibrating for 20 minutes to form a uniformly dispersed suspension, filtering the suspension, and drying the filtrate to obtain graphene.

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Abstract

The invention provides a method for continuously preparing graphene. The method comprises the steps that: a metal deposition mesh with a pore size of 50-325meshes is washed; the washed metal deposition mesh is arranged in a reaction chamber; protective gas is delivered into the reaction chamber, and the state is maintained for 1-60min; the reaction chamber is heated to 600-1100 DEG C; a gas-state carbon-containing substance is delivered in, and the gas-state carbon-containing substance is subjected to a reaction for 30-60min under the catalyzing of the metal deposition mesh, such that graphene is prepared, wherein the graphene accumulates at a collection mesh with a pore size of 200-325meshes; the collection mesh is replaced, and graphene collection is continued. The method provided by the invention has the advantage of non-intermittent continuous preparation, simple equipment, and simple and feasible operations. Compared with graphene prepared with a common reduction method, the graphene prepared with the method provided by the invention has the advantages of low defect rate and good conductivity.

Description

technical field [0001] The invention relates to a method for preparing graphene by chemical vapor deposition, in particular to a method for continuously preparing graphene. Background technique [0002] Graphene is a two-dimensional carbon atom crystal discovered by Andre K. Geim of the University of Manchester in 2004. It is a single-layer or multi-layer extremely thin carbon material. Single-layer graphene has excellent electrical and thermal conductivity and low thermal expansion coefficient, and its theoretical specific surface area is as high as 2630m 2 / g (A Peigney, Ch Laurent, et al. Carbon, 2001, 39, 507), can be used in effect transistors, electrode materials, composite materials, liquid crystal display materials, sensors, etc. Graphene's unique structure and photoelectric properties make it a research hotspot in the fields of carbon materials, nanotechnology, condensed matter physics and functional materials. [0003] The research and application of graphene put...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y40/00C01B32/186
Inventor周明杰袁新生王要兵
OwnerOCEANS KING LIGHTING SCI&TECH CO LTD