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Novel graphene preparation technique

A preparation process and graphene technology, applied in the field of novel graphene preparation technology, can solve the problems of complex graphene preparation process, high production cost, low output and efficiency, etc., to solve the problems of high area ratio and purity, and improve high efficiency. Area ratio and purity, effect of reducing production cost

Active Publication Date: 2015-02-25
张泽宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The graphene preparation process is complicated and the production cost is high
[0004] The existing preparation methods of graphene include: one, micromechanical exfoliation method, the yield and efficiency of this method are too low; two, graphite oxide reduction method, the graphene synthesized by this method is more likely to cause a large amount of structural defects; three, chemical vapor phase Deposition growth method, the cost of this method is relatively high, and the process is complicated; 4. Electrolysis method, the purity of graphene prepared by this method is relatively low

Method used

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Embodiment 1

[0030] A kind of novel graphene preparation process of the present invention, comprises the following steps: get 50g graphite particles and insert in the stirrer 1, adopt the magnet 2 that four slices of intensity are 0.5T and concentration be the electrolytic solution of the ammonium sulfate of 35%; The magnet 2 is evenly placed around the stirrer 1, the electrolyte and graphite particles are put into the stirrer 1, and stirred by the stirrer 1 for 2 hours to form a mixture of graphene conjugates and electrolyte; the mixture 3 passes through the stirrer 1 was decomposed by centrifugation for 8 minutes at a speed of 1000r / min, and the agglomerated graphene precipitate was removed after centrifugation, and the suspension was collected; the suspension was filtered, washed repeatedly for 5 times with 95% ethanol solution, and then heated at a temperature of 70°C Dry in a vacuum environment for 2 hours to obtain a solid containing graphene; place the solid containing graphene in an...

Embodiment 2

[0033] A kind of novel graphene preparation process of the present invention, comprises the following steps: get 50g graphite particles and insert in the stirrer 1, adopt the magnet 2 that four pieces of strength are 0.3T and volume concentration be the electrolytic solution of the ammonium sulfate of 40%; The magnet 2 is evenly placed around the stirrer 1, the electrolyte and graphite particles are put into the stirrer 1, and after being stirred by the stirrer for 1.5 hours, a mixture of graphene conjugates and electrolyte solution is formed; the mixture 3 is centrifuged Decompose for 8 minutes, the rotating speed is 1000r / min, remove the agglomerated graphene precipitate after centrifugation, and collect the suspension; filter the suspension, wash it repeatedly with water for 5 times, and then dry it in a vacuum environment at 80°C for 2 hours to obtain Graphene solid: The graphene-containing solid is placed in an oxygen-free environment filled with nitrogen for calcination, ...

Embodiment 3

[0036] A kind of novel graphene preparation process of the present invention, comprises the following steps: get 50g graphite particle and insert in agitator 1, adopt four magnets 2 that strength is 0.5T, adopt the imidazolyl hexafluoro that volume ratio is 1:1 Electrolyte of phosphorus salt and water; the magnet 2 is evenly placed around the stirrer 1, the electrolyte and graphite particles are put into the stirrer 1, and after being stirred by the stirrer for 1 hour, a graphene composite and an electrolyte are formed The mixture; the mixture 3 was centrifuged and decomposed by the stirrer 1 for 8 minutes, and the rotating speed was 1000r / min, and the agglomerated graphene precipitate was removed after centrifugation, and the suspension was collected; the suspension was filtered, and 5% ethanol solution was used Repeated washing for several times, and then drying in a vacuum environment at 80°C for 2 hours to obtain a solid containing graphene; placing the solid containing gra...

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Abstract

The invention relates to a novel graphene preparation technique which at least comprises the following steps: S001: adding graphite particles and an electrolyte into a stirrer, and stirring the graphite particles in a magnetic field environment by the stirrer so that the graphite particles form millimeter-grade graphene under the action of the shearing force of the stirrer; S002: rotating the millimeter-grade graphene in the magnetic field environment to generate potential difference so that the ions in the electrolyte are combined with the graphene to form a graphene conjugate-electrolyte mixture; S003: centrifuging the graphene conjugate-electrolyte mixture to remove the aggregated graphene precipitate, and collecting the suspension; and S004: filtering the suspension, washing, drying and roasting to obtain the graphene. The graphene preparation provided by the invention is simple, has high operability, is suitable for industrial production, improves the high area ratio and purity of the graphene, enhances the graphene production efficiency and lowers the production cost.

Description

technical field [0001] The invention relates to the technical field of carbon material preparation, in particular to a novel graphene preparation process. Background technique [0002] In 2004, Andre Geim (Andre Geim) and Konstantin Novoselov (Konstantin Novoselov), physicists at the University of Manchester, UK, successfully separated graphene from graphite in experiments. . Graphene is a new material with a single-layer sheet structure composed of carbon atoms. The two-dimensional material with a thickness of only one carbon atom has attracted widespread attention for its unique structure and photoelectric properties. It is the thinnest and hardest nanomaterial known in the world. It has a large surface area ratio, excellent transparency, Properties such as electrical conductivity and thermal conductivity are considered to be ideal materials. It can be applied to the manufacture of transparent touch screens, light panels, supercapacitors, batteries, and even solar cells...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 张德志张泽宇
Owner 张泽宇
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