Method for preparing graphene from amorphous carbon

A technology of amorphous carbon and graphene, which is applied in the field of graphene preparation, can solve the problems of not much, unfavorable graphene industrialization, and few research or reports, and achieve uniform layer number, large industrialization prospect, and low cost Effect

Active Publication Date: 2016-06-08
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the current graphene preparation methods, there are not many studies on the preparation of graphene from amorphous carbon. The reason is that in the method of preparing crystalline carbon from amorphous carbon, one of the two conceivable ideas is Completely destroy the structure of the original amorphous carbon so that carbon atoms can recombine and grow into crystalline carbon, and the other is not to completely break the structure of amorphous carbon, but to induce its crystal form to change and continue to grow into crystalline carbon, no matter which method , its preparation will be a complex and delicate process, which needs to be carried out in a highly controlled environment, which is not conducive to the industrialization of graphene, so there are few studies or reports in this area.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Amorphous carbon is processed using a screw extruder, including the following steps:

[0036] (1) Put the screened smaller lump coal into the screw extruder from the feeding port, and the coal enters the preheating section, the preheating temperature is 200°C, and its residence time in the preheating section is 5 minutes;

[0037] (2) The preheated coal enters the sealing section, the temperature of the sealing section is 600°C, and argon is passed through, and 3A molecular sieve is added from the first feeding port, mixed with the preheated coal, and the borate carrier is removed from the The second feeding port is added later, the residence time of coal in the sealing section is 50min, and N-methyl perfluorooctane sulfonamide is attached to the borate carrier;

[0038] (3) The compound after coming out of the sealing section enters the cooling section, the temperature of this section is 10°C, the screw speed is reduced by 2 / 3, and its residence time in this section is...

Embodiment 2

[0042] Amorphous carbon is processed using a screw extruder, including the following steps:

[0043] (1) Put the screened smaller lump coal into the screw extruder from the feeding port, and the coal enters the preheating section, the preheating temperature is 300°C, and its residence time in the preheating section is 5 minutes;

[0044] (2) The preheated coal enters the sealing section, the temperature of the sealing section is 800°C, and argon is passed through, and 4A molecular sieve is added from the first feeding port, mixed with the preheated coal, and the mica powder carrier is added from the first feeding port. The second feeding port is added later, and the residence time of coal in the sealing section is 40min. The mica powder carrier is attached with N-ethyl perfluorooctane sulfonamide. The preparation method is to soak the mica powder in N-ethyl perfluorooctane sulfonamide Obtained in octyl sulfonamide-ethanol dispersion;

[0045] (3) The compound after coming out o...

Embodiment 3

[0049] Amorphous carbon is processed using a screw extruder, including the following steps:

[0050] (1) Put the screened smaller massive coal gangue into the screw extruder from the feeding port, and the coal enters the preheating section, the preheating temperature is 400°C, and its residence time in the preheating section is 5 minutes;

[0051] (2) The preheated coal gangue enters the sealing section, the temperature of the sealing section is 900°C, and argon is passed through, and 4A molecular sieve is added from the first feeding port, mixed with the preheated coal gangue, and the mica powder carrier Add later from the second feeding port, the residence time of coal gangue in the sealing section is 40min, the mica powder carrier is attached with N-propyl perfluorooctane sulfonamide, and its preparation method is to soak the mica powder in N-propane Obtained in base perfluorooctane sulfonamide-ethanol dispersion;

[0052] (3) The compound after coming out of the sealing s...

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Abstract

The invention discloses a method for preparing graphene from amorphous carbon. The method comprises the following steps: preheating the amorphous carbon; adding a catalyst to the preheated amorphous carbon; pyrolyzing the amorphous carbon under the action of the catalyst; depositing cracked carbon atoms on a layered carrier to obtain graphene containing the carrier; and removing the carrier to obtain graphene. The method for preparing graphene from amorphous carbon with wide sources has the advantages of low cost, convenient obtaining of the above raw material, and high resource utilization rate; and the method is directly realized through a screw extruder, and has great industrial prospect.

Description

technical field [0001] The present invention relates to the technical field of preparation of graphene. Background technique [0002] Graphene is a planar atomic crystal structure in which carbon atoms are closely arranged in a honeycomb shape in regular hexagons. The unique planar structure of graphene makes it possess many characteristics that three-dimensional crystals do not have, such as a specific surface area of ​​up to 2.6×103m2 / g , the thermal conductivity is as high as 3×103W / (m.K), the mechanical properties are 1.06×103Gpa, the Young’s modulus is 1.0TPa, and its mechanical strength is as high as 130Gpa, which is more than 100 times that of steel. Graphene has a stable regular hexagonal lattice structure so that it has excellent electrical conductivity, and the electron mobility is as high as 1.5×10 4 cm 2 / (V.s), which is 2 times higher than the maximum mobility of semiconductor indium antimonide and 10 times higher than that of commercial silicon wafers. In add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 陈庆曾军堂叶任海陈兵
Owner CHENDU NEW KELI CHEM SCI CO LTD
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