Method for preparing graphene by using liquid alkali metal

A technology of liquid alkali and graphene, which is applied in the field of carbon materials, can solve the problems of low efficiency and purity of graphene, environmental pollution, and easy agglomeration of graphene, and achieve low requirements for the preparation environment and equipment, simple and fast preparation process, and The effect of pollution-free process

Active Publication Date: 2019-06-04
王奉瑾
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  • Abstract
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  • Claims
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Problems solved by technology

But the main problem encountered in the process of using graphene is that it cannot be mass-produced at present
[0003] At present, there are mainly two methods for the production and preparation of graphene. One method is the mechanical exfoliation method, which uses the friction and relative motion between the object and graphene to obtain a thin layer of graphene material. The efficiency and purity of obtaining graphene are extremely low, and the result is very unsatisfactory; the second method is the redox method, which

Method used

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Experimental program
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Embodiment Construction

[0023] A kind of method utilizing liquid alkali metal to prepare graphene comprises the steps:

[0024] S1: Prepare preparation materials: liquid alkali metal, kerosene, protective gas and carbon dioxide gas;

[0025] S2: placing kerosene and liquid alkali metal in a sealed reaction tank;

[0026] S3: Mix protective gas and carbon dioxide gas and heat to high temperature;

[0027] S4: Slowly extract the kerosene in the sealed reaction tank, and simultaneously pass the heated protective gas and carbon dioxide gas into the sealed reaction tank;

[0028] S5: heating the sealed reaction tank to a high temperature;

[0029] S6: Pass the high temperature carbon dioxide gas into the sealed reaction tank to react with the liquid alkali metal in the protective environment of the protective gas, so that the liquid alkali metal captures the oxygen in the carbon dioxide gas, and reduces the carbon element and basic oxide, basic The oxide will react with carbon dioxide to generate carbo...

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Abstract

The invention provides a method for preparing graphene by using a liquid alkali metal, the liquid alkali metal is subjected to a reduction reaction with carbon dioxide gas in a high-temperature environment to generate carbon elementary substance (namely the graphene) to prepare the graphene, the preparation process is simple and rapid, pollution is avoided, the requirements on the preparation environment and equipment are low, the cost is low, the control process can be controlled to stop in a controllable manner at any time; the production content of the graphene is controlled, and the production quality and the production speed are controllable.

Description

【Technical field】 [0001] The invention belongs to the technical field of carbon materials, and in particular relates to a method for preparing graphene by using liquid alkali metal. 【Background technique】 [0002] Due to its unique structure and photoelectric properties, graphene has become a research hotspot in the fields of carbon materials, nanotechnology, condensed matter physics and functional materials. Graphene is a new type of nanomaterial with the thinnest, highest strength, and strongest electrical and thermal conductivity found so far. Graphene is called "black gold" and is the "king of new materials". Its theoretical specific surface area is as high as 2630m2 / g. It can be used in effect transistors, electrode materials, composite materials, liquid crystal display materials, sensors, etc. But the main problem encountered in the process of using graphene is that it cannot be mass-produced at present. [0003] At present, there are mainly two methods for the produ...

Claims

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Application Information

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IPC IPC(8): C01B32/184
Inventor 王奉瑾戴雪青
Owner 王奉瑾
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