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Preparation method of graphene

A graphene and graphite powder technology, applied in the field of graphene, can solve the problems of difficulty in cleaning and filtering graphene, long reaction time, low production efficiency, etc., and achieve the effects of simple and feasible operation, short preparation time and high production efficiency

Inactive Publication Date: 2013-06-26
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

However, the implementation of this method not only requires the use of large-scale reaction axes, but also the reaction time is too long, the cleaning and filtration of graphene is difficult, and it is easy to agglomerate after filtration, which is not conducive to the advantages of graphene, and the production efficiency is low.

Method used

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preparation example Construction

[0024] A kind of preparation method of graphene, such as figure 1 shown, including the following steps:

[0025] (1) drying the metal substrate after cleaning;

[0026] (2) Place the dried substrate in the reaction chamber, and pass a protective gas with a flow rate of 10 to 1000 sccm into the reaction chamber, and keep it for 1 to 60 minutes;

[0027] (3) Subsequently, the reaction chamber is heated to 900-1100°C, and a reducing gas with a gas flow rate of 10-200 sccm is introduced, and the aeration time is kept for 5-10 minutes; then graphite oxide powder is fed at a speed of 1-10 g / min The body is added to the reaction chamber for reaction, and the reaction is maintained for 10 to 60 minutes;

[0028] (4) After the reaction is completed, stop adding the graphite oxide powder and stop feeding the reducing gas, cool to room temperature under a protective gas atmosphere, and prepare graphene on the surface of the substrate.

[0029] In the preparation method of described gr...

Embodiment 1

[0039] A kind of preparation method of graphene, comprises the following steps:

[0040] (1) Carry out ultrasonic cleaning to the stainless steel foil with deionized water, ethanol and acetone respectively, and dry after cleaning;

[0041] (2) The stainless steel foil after drying is arranged in the reaction chamber, and the argon gas with a flow rate of 500 sccm is introduced into the reaction chamber, and kept for 30 minutes;

[0042] (3) The reaction chamber is heated to 1100° C., and the hydrogen gas of 50 sccm is fed into it, and the ventilation time is maintained for 5 minutes; The feed port is put into the reaction chamber for reaction, and the graphite oxide powder enters the reaction chamber after being screened by a 300-mesh copper mesh at the feed port, and the reaction is kept for 20 minutes;

[0043] (4) After the reaction is completed, stop adding graphite oxide powder and stop feeding hydrogen, cool to room temperature under an argon atmosphere, make graphene o...

Embodiment 2

[0046] A kind of preparation method of graphene, and the difference of embodiment one is only: the protective gas in step (1) and step (4) is nitrogen, and the reducing gas that feeds in step (3) is hydrazine vapor, The particle size of graphite oxide powder is 200 mesh.

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Abstract

The invention provides a preparation method of graphene. The preparation method comprises the following steps of: cleaning and drying a substrate made of metal material; placing the dried substrate into a reaction chamber; charging protective gas into the reaction chamber; heating the reaction chamber; charging reducing gas; adding graphite oxide powder to the reaction chamber to react; stopping adding the graphite oxide powder as well as stopping charging the reducing gas after the reaction is accomplished; cooling to reach the room temperature at the protective gas atmosphere; and preparing the graphene on the surface of the substrate. According to the preparation method of the graphene, provided by the invention, the graphite oxide is adopted and used as the raw material and is subjected to reduction at high temperature under the reducing gas atmosphere in order to prepare the graphene; and compared with the conventional solution reducing method, the preparation method provided by the invention has the advantages of being short in preparation time, small in floor space for the required equipment, simple, easy and feasible in operation, free from filtering, high in production efficiency, and easy for realization of automatic and industrial production.

Description

technical field [0001] The invention relates to the field of graphene, in particular to a method for 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 and sensors, etc. [0003] The research and application of graphene put forward an urgent requirement for its large-scale and low-cost preparation. At present, the methods for preparing graphene mainly include graphite exfoliation (Novoselov K S, Geim A K, et al.Science 2004, 306, 666), ultrasonic exfoliat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/19
Inventor 周明杰袁新生王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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