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Method for quickly preparing high-quality graphene

A graphene, high-quality technology, applied in the field of rapid preparation of high-quality graphene, can solve the problems of intrinsic property damage, many graphene defects, unfavorable environmental protection, etc., and achieve convenient operation, good sheet effect, and easy promotion Effect

Active Publication Date: 2016-07-27
HUAQIAO UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These pretreatment processes take a long time, and inevitably involve the use of a series of chemical reagents, which is not conducive to environmental protection, and the produced graphene has many defects, and its intrinsic characteristics have been destroyed to a certain extent. To broaden the effect of graphene application, it is necessary to further realize the rapid preparation of intrinsic graphene through non-oxidation or weak oxidation to meet the requirements of industrial production

Method used

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  • Method for quickly preparing high-quality graphene
  • Method for quickly preparing high-quality graphene
  • Method for quickly preparing high-quality graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Using 80-mesh flake graphite powder as raw material, using ammonium bicarbonate solid as intercalation agent, according to the ratio of graphite powder and intercalation agent mass ratio of 1:4, after pre-mixing graphite powder and intercalation agent evenly, spare;

[0036] 2) Put the pre-mixed mixture in step 1) into a stainless steel ball mill tank, add 400g of zirconia grinding balls of different sizes according to the ball-to-material ratio of 6-20:1, and control the total charge to 1 / 2 of the ball mill tank volume 1 / 3 to 2 / 3 of the mixture was stirred and milled in a ball mill at a speed of 90r / min for 1 hour to obtain a uniform black solid mixture;

[0037] 3) Put the black solid mixture obtained in step 2) into a polytetrafluoroethylene-lined stainless steel hydrothermally sealed reaction kettle, heat it in a vacuum oven at a temperature of 60°C for 2 hours, take it out, cool it to room temperature, and then transfer Put it into a ceramic crucible, put it in...

Embodiment 2

[0041] 1) Using 80-mesh flake graphite powder as raw material, using ammonium bicarbonate solid as intercalation agent, according to the mass ratio of graphite powder and intercalation agent as 1:20, after pre-mixing graphite powder and intercalation agent evenly, spare;

[0042] 2) Put the pre-mixed mixture in step 1) into a stainless steel ball mill tank, add 400g of zirconia grinding balls of different sizes according to the ball-to-material ratio of 6-20:1, and control the total charge to 1 / 2 of the ball mill tank volume 1 / 3 to 2 / 3 of the mixture was stirred and milled in a ball mill for 1 hour at a speed of 100r / min to obtain a uniform black solid mixture;

[0043] 3) Put the black solid mixture obtained in step 2) into a polytetrafluoroethylene-lined stainless steel hydrothermally sealed reaction kettle, heat it in a vacuum oven at a temperature of 80°C for 2 hours, take it out, cool it to room temperature, and then transfer Put it into a ceramic crucible, put it into a...

Embodiment 3

[0045] 1) Using 8000-mesh flake graphite powder as raw material, using ammonium bicarbonate solid as intercalation agent, according to the ratio of graphite powder and intercalation agent mass ratio of 1:20, after pre-mixing graphite powder and intercalation agent evenly, spare;

[0046] 2) Put the pre-mixed mixture in step 1) into a stainless steel ball mill tank, add 400g of zirconia grinding balls of different sizes according to the ball-to-material ratio of 6-20:1, and control the total charge to 1 / 2 of the ball mill tank volume 1 / 3 to 2 / 3 of the mixture was stirred and milled in a ball mill at a speed of 90r / min for 1 hour to obtain a uniform black solid mixture;

[0047] 3) Put the black solid mixture obtained in step 2) into a polytetrafluoroethylene-lined stainless steel hydrothermally sealed reaction kettle, heat it in a vacuum oven at a temperature of 70°C for 2 hours, take it out, cool it to room temperature, and then transfer Put it into a ceramic crucible, put it...

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Abstract

The invention discloses a method for quickly preparing high-quality graphene. Graphite powder and solid intercalator which can be fully decomposed into gas after being heated are mixed, ball-milled and properly heated to realize intercalation, then 100 to 1200W microwave radiation treatment is performed for 0.05 to 10min, the intercalator is fully decomposed into gas at a high temperature, and gas molecules seep into graphite sheets and overcome Van der Waals force between the graphite sheets to enable graphite to be effectively stripped. The method for quickly preparing high-quality graphene has the advantages of simple preparation process, low manufacturing cost, convenience in process operation, quickness and high efficiency, environment friendliness, high product quality, easiness in large-scale use and the like.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and in particular relates to a method for rapidly preparing high-quality graphene. Background technique [0002] Since Geim, a professor at the University of Manchester in the United Kingdom, first stripped graphene from graphite by tape stripping method in 2004, graphene has attracted more and more attention from researchers because of its unique structure, properties and potential applications. It has become a research hotspot in many fields such as materials, chemistry and physics. In recent years, researchers have developed many methods for preparing graphene, including mechanical exfoliation, chemical vapor deposition (CVD), epitaxial growth, and redox methods. The controllability of the mechanical exfoliation method is poor, and the size of the obtained graphene is small and there is a large uncertainty. At the same time, the efficiency is low, and it is not suitable for large-scale prod...

Claims

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Application Information

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IPC IPC(8): C01B31/04
CPCC01P2002/82C01P2002/85C01P2004/03C01P2004/04
Inventor 陈国华林菊香蕫菁陈韩莉王师赵立平
Owner HUAQIAO UNIVERSITY
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