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Method for preparing graphene from microcrystalline graphite

A technology of microcrystalline graphite and microcrystalline graphite powder, which is applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of limited development and research of microcrystalline graphite, and achieves guaranteed intercalation effect, guaranteed expansion ratio, Improve the effect of corrosion resistance

Inactive Publication Date: 2017-11-17
HUNAN GUOSHENG GRAPHITE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the raw materials used in the batch preparation of graphene are flake graphite, but the development and research on microcrystalline graphite are very limited, and they are usually exported as raw materials.

Method used

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  • Method for preparing graphene from microcrystalline graphite
  • Method for preparing graphene from microcrystalline graphite
  • Method for preparing graphene from microcrystalline graphite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The present invention prepares the method for expanded microcrystalline graphite material with microcrystalline graphite, comprises steps as follows: comprises graphite expansion furnace, adopts high-temperature expansion method, comprises the following steps:

[0061] S1. Take the microcrystalline graphite raw material, the carbon content is 70%, crushing and grinding, until the particle size is 300 mesh microcrystalline graphite powder;

[0062] S2. the microcrystalline graphite powder obtained in step S1, perchloric acid and potassium permanganate are placed in the reaction device for the first chemical intercalation treatment to obtain an acidic suspension of expandable microcrystalline graphite, and the resulting expandable microcrystalline graphite Filtrate the acidic suspension, keep the filtrate for later use, then wash and dry the filtrate to obtain an expandable microcrystalline graphite; wherein, the specific steps of the first chemical intercalation are: S21....

Embodiment 2

[0069] The steps of this embodiment are basically the same as in Embodiment 1, the difference is that:

[0070] S1. Take the microcrystalline graphite raw material, the carbon content is 70%, crushing and grinding, until the particle size is 300 mesh microcrystalline graphite powder;

[0071] S2. The specific steps of chemical intercalation for the first time are: S21. Mix perchloric acid and microcrystalline graphite powder at a liquid-solid ratio of 15:1L / Kg and stir evenly; S22. Press microcrystalline graphite powder and high manganese The mass ratio of potassium permanganate is 4:1. Add potassium permanganate, stir evenly at room temperature, raise the temperature to 40°C and continue to stir for 2 hours; S23. Add deionized water to raise the temperature in the reaction device to 70°C, and then Continue to stir and react for 2h;

[0072]S4. The specific steps of the second chemical intercalation are: S41. The primary expanded microcrystalline graphite obtained in step S3 ...

Embodiment 3

[0076] The steps of this embodiment are basically the same as in Embodiment 1, the difference is that:

[0077] S1. Take the microcrystalline graphite raw material, the carbon content is 75%, crushing and grinding, until the particle size is 350 mesh microcrystalline graphite powder;

[0078] S2. The specific steps of chemical intercalation for the first time are: S21. Mix perchloric acid and microcrystalline graphite powder at a liquid-solid ratio of 20:1L / Kg and stir evenly; S22. Press microcrystalline graphite powder and high manganese The mass ratio of potassium permanganate is 6:1. Add potassium permanganate, stir evenly at room temperature, raise the temperature to 50°C and continue to stir for 2 hours; S23. Add deionized water to raise the temperature in the reaction device to 80°C, and then Continue to stir and react for 2h;

[0079] S4. The specific steps of the second chemical intercalation are: S41. The primary expanded microcrystalline graphite obtained in step S3...

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Abstract

The invention belongs to the technical field of preparation of materials and particularly relates to a method for preparing graphene from expanded graphite. Microcrystalline graphite serving as a raw material is subjected to first chemical intercalation treatment, first high-temperature expansion treatment, second intercalation treatment and second high-temperature expansion treatment sequentially, second expanded microcrystalline graphite is obtained and subjected to ultrasonic treatment twice, and a peeling material is obtained and subjected to press filtering, separation and washing, and graphene is obtained. According to the method, the microcrystalline graphite is taken as the raw material, the production technology process is short, and the method is low in cost, produces no sulfur and can be used for mass production of graphene materials.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and more specifically relates to a method for preparing graphene from microcrystalline graphite. Background technique [0002] Graphene, is a sp 2 The hybridized carbon atoms form bonds in the form of a hexagonal lattice, and the formed two-dimensional planar single-layer structure of carbon is an allotrope of carbon. Graphene is the basic unit for constructing other dimensional carbon materials. When it changes in the way of wrapping, winding and stacking, it can form zero-dimensional fullerene, one-dimensional carbon nanotube and three-dimensional graphite respectively. Graphene has good electrical and optical properties, mechanical properties, thermal conductivity and extremely high charge carrier mobility, as well as excellent mechanical strength and flexibility. These properties of graphene make it attract a lot of attention and quickly become a research hotspot. Graphene and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19
CPCC01B2204/04C01B2204/32
Inventor 林前锋李丽萍
Owner HUNAN GUOSHENG GRAPHITE TECH CO LTD
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