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Method for efficiently preparing multi-layer graphene by low cost

A multi-layer graphene, low-cost technology, applied in the field of carbon materials, can solve the problems of uncontrollable graphene materials, and achieve the effects of graphitization, reduced corrosion, and increased size

Inactive Publication Date: 2017-03-29
JIANGSU ZHONGYA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the discovery of graphene, due to its excellent performance and huge application prospects, it has triggered a research boom in the fields of physics and material science. At present, the main methods for preparing graphene include mechanical exfoliation of graphite, epitaxial growth, graphite oxidation, dispersion and reduction. methods and chemical vapor deposition methods, but the above methods still cannot controllably synthesize graphene materials with specific functions and applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Pulverization: the bituminous coal is pulverized by a coal pulverizer, passed through a standard sieve, the mesh number is 20, and the first bituminous coal powder is obtained;

[0022] (2) Prepare a deliming solution: mix hydrofluoric acid with a mass fraction of 8% and fluosilicic acid with a mass fraction of 10% at a mass ratio of 1:1 to obtain a deliming solution;

[0023] (3) Deliming: mix the first bituminous coal powder and the deliming solution evenly at a mass ratio of 1:5, place them in a closed container, and carry out acid leaching reaction. The reaction temperature is 30-60°C, and the reaction time is 3-10h. Obtain bituminous coal solution;

[0024] (4) Cleaning and drying: filter the bituminous coal solution to obtain the second bituminous coal powder, add deionized water to the second bituminous coal powder, stir and mix, use a centrifuge to centrifuge, pour off the supernatant, and repeat the above steps 2-5 For the second time, add absolute ethanol...

Embodiment 2

[0029] (1) Pulverization: the bituminous coal is pulverized by a coal pulverizer, passed through a standard sieve with a mesh number of 50, and the first bituminous coal powder is obtained;

[0030] (2) Prepare deliming solution: mix hydrofluoric acid with a mass fraction of 10% and fluosilicic acid with a mass fraction of 10% at a mass ratio of 1:1 to obtain a deliming solution;

[0031] (3) Deliming: Mix the first bituminous coal powder and the deliming solution uniformly at a mass ratio of 1:10, place them in a closed container, and carry out acid leaching reaction at a reaction temperature of 40°C and a reaction time of 5 hours to obtain a bituminous coal solution;

[0032] (4) Cleaning and drying: suction filter the bituminous coal solution to obtain the second bituminous coal powder, add deionized water to the second bituminous coal powder, stir and mix, use a centrifuge to centrifuge, the centrifuge speed is 4000r / min, and the time is 3min, Pour off the supernatant, rep...

Embodiment 3

[0037] (1) Pulverization: the bituminous coal is pulverized by a coal pulverizer, passed through a standard sieve with a mesh number of 100, and the first bituminous coal powder is obtained;

[0038] (2) Prepare deliming solution: mix hydrofluoric acid with a mass fraction of 15% and fluosilicic acid with a mass fraction of 15% at a mass ratio of 1:1 to obtain a deliming solution;

[0039] (3) Deliming: mix the first bituminous coal powder and the deliming solution uniformly at a mass ratio of 1:12, place them in an airtight container, and carry out acid leaching reaction at a reaction temperature of 60°C and a reaction time of 3 hours to obtain a bituminous coal solution;

[0040] (4) Cleaning and drying: filter the bituminous coal solution to obtain the second bituminous coal powder, add deionized water to the second bituminous coal powder, stir and mix, use a centrifuge to centrifuge, the centrifuge speed is 4000r / min, and the time is 5min. Pour off the supernatant, repeat th...

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PUM

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Abstract

The invention discloses a method for efficiently preparing multi-layer graphene by low cost. Bitumite is adopted as a raw material, the additional value of coal resources is improved, meanwhile, a valuable process route is put forward for preparing the graphene by low cost on a large scale, bitumite price is only half of the price of anthracite, and cost for producing the graphene by taking the bitumite as the raw material is lowered by about 30% than the prior art. In addition, by use of the method, boracic acid is adopted as catalyst, the size of the aromatic structure synusia of an organic basic unit in the bitumite can be effectively improved so as to be more favorable for graphitization, deliming solution adopts hydrofluoric acid and fluosilicic acid, the corrosivity of the hydrofluoric acid for containers can be lowered, and meanwhile, a good deliming function can be performed. The method is high in preparation efficiency and is suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of carbon materials, in particular to a method for preparing multilayer graphene with high efficiency and low cost. Background technique [0002] Graphene is a monoatomic layer of graphite, which is a planar film composed of carbon atoms in a hexagonal honeycomb lattice with sp2 hybrid orbitals. According to the number of layers, graphene can be divided into single-layer graphene, double-layer graphene or multi-layer graphene, which only absorbs 2.3% of light, and its thermal conductivity is as high as 5300W / m K, which is higher than that of carbon nanotubes and diamonds. Its electron mobility exceeds 15000cm2 / V·s, which is higher than that of carbon nanotubes or silicon crystals, and its resistivity is only about 10‐8Ω·cm, which is lower than that of copper or silver. It is the material with the smallest resistivity in the world. Because of its extremely low resistivity and extremely fast electron migratio...

Claims

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Application Information

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IPC IPC(8): C01B32/184
Inventor 朱国森杨云利束正梅
Owner JIANGSU ZHONGYA NEW MATERIAL