A kind of method for preparing graphene

A graphene and layered compound technology, applied in the field of graphene preparation, can solve the problems of industrialized production of difficult graphene, long grinding time, small crystal size, etc., and achieves wide carbon source sources, simple preparation process, and stable flake orientation. Effect

Active Publication Date: 2018-02-06
深圳市睿烯新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to the above, although graphene is obtained through repeated grinding by mechanical means, due to the effect of grinding compressive stress, the grinding impact will cause certain damage to the graphite lattice, and the grinding will exert pressure on the graphite, resulting in a huge impact on the exfoliated graphite. This impact force will cause structural defects in the graphene layer, which can easily cause lattice defects in the graphene layer structure, reduce the size of the graphene after peeling off, and make the crystal size of the graphene product obtained is small, making it difficult to obtain large size and high Quality graphene, whether it is mechanical ball milling or mechanical jet milling, is sacrificing the size and lattice integrity of graphene; in addition, the strong pressure of the grinding medium will cause the graphite layer structure to become more compact, which will lead to the exfoliation effect reduce the grinding time, resulting in long grinding time and high cost; moreover, the current grinding and production of graphene is intermittent, and the stripped graphene cannot be screened out in time while the graphite is stripped, so it is difficult to carry out continuous and stable mass production , it is difficult to realize the industrial production of graphene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) In parts by weight, 1 part of kaolin and 5 parts of butanol are uniformly mixed, ultrasonicated for 30 minutes at 50°C, and finally washed and dried to obtain modified kaolin;

[0030] (2) In parts by weight, 0.01 part of titanium isopropoxide and the modified kaolin obtained in the step (1) are added to a microwave oven with a rated power of 500w and processed for 10 min to obtain a modified kaolin loaded with titanium isopropoxide ;

[0031] (3) In parts by weight, the aqueous solution of 0.2 parts of glucose and the modified kaolin loaded with titanium isopropoxide obtained in the step (2) are added to the modified kaolin loaded with titanium isopropoxide obtained through ultrasonic treatment or mechanical stirring. Kaolin suspension, under the vacuum pressure condition of 5Mpa, make glucose fully enter the interlayer of kaolin, and finally filter to obtain the mixture;

[0032] (4) Add the mixture obtained in the step (3) into a high temperature reactor, under ...

Embodiment 2

[0035] (1) In parts by weight, 10 parts of vermiculite and 50 parts of hexanol were evenly mixed, and ultrasonicated for 50 minutes at 60° C., finally washed and dried to obtain modified vermiculite;

[0036] (2) In parts by weight, 1 part of manganese nitrate and the modified vermiculite obtained by the step (1) are added to a microwave oven with a rated power of 550w and processed for 15min to obtain the modified vermiculite loaded with manganese nitrate;

[0037] (3) In parts by weight, the aqueous solution of 2 parts of fructose and the manganese nitrate modified vermiculite obtained in the step (2) are added to the manganese nitrate modified vermiculite suspension obtained by ultrasonic treatment or mechanical stirring. Liquid, under the vacuum pressure condition of 15Mpa, make fructose fully enter the interlayer of vermiculite, finally filter and obtain mixture;

[0038] (4) Add the mixture obtained in the step (3) into a high temperature reactor, under the protection of...

Embodiment 3

[0041] (1) In parts by weight, 100 parts of rectorite and 500 parts of decanol were uniformly mixed, and ultrasonicated for 60 minutes at 70° C., finally washed and dried to obtain modified rectorite;

[0042] (2) In parts by weight, 40 parts of ferrous oxalate and the modified rectorite obtained in the step (1) are added to a microwave oven with a rated power of 600w and processed for 20min to obtain a modified rectorite loaded with ferrous oxalate. Topstone;

[0043](3) In parts by weight, 20 parts of cellulose aqueous solution and the ferrous oxalate modified rectorite obtained in the step (2) are added to the ferrous oxalate modified rectorite obtained by ultrasonic treatment or mechanical stirring. Rectorite suspension, under the vacuum pressure condition of 20Mpa, make the cellulose fully enter the interlayer of rectorite, and finally filter to obtain the mixture;

[0044] (4) Add the mixture obtained in the step (3) into a high-temperature reactor, under the protection...

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Abstract

The invention relates to a method for preparing graphene. The method includes: pretreating a layered compound to remove impurities among layers and allow flaky orientation to form among the layers, loading catalysts to structures among the layers, adding a carbon source, and performing catalyzing under a high-temperature condition to obtain the graphene. Compared with the prior art, the method has the advantages that the carbon source is wide in source, the method is simple in process, low in cost and capable of effectively protecting the structure of the graphene, and the industrial production of the graphene can be achieved easily.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, in particular to a method for preparing graphene. Background technique [0002] In 2004, two scientists from the University of Manchester in the United Kingdom discovered graphene using the method of micromechanical exfoliation, and won the Nobel Prize in Physics in 2010. Graphene is a single-atom-thick flat plate structure with sp2-bonded carbon atoms. In theory, it has a perfect hexagonal network structure and exhibits excellent electronic stability, thermal conductivity, optical properties, and mechanical properties. Since the discovery of graphene, due to its excellent performance and huge market application prospects, it has triggered a research boom in the fields of physics and material science. Graphene is currently the thinnest and hardest nanomaterial. It also has properties that many ordinary materials do not have, such as good light transmission, high thermal conductivity, hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01B2204/04C01B2204/32
Inventor 钟传新苏情王君
Owner 深圳市睿烯新材料科技有限公司
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