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A kind of preparation method of growing graphene in situ on graphite fiber

A graphite fiber, in-situ growth technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of irreversible agglomeration, and achieve the effect of good conductivity, high purity, and not easy to agglomerate

Inactive Publication Date: 2017-12-01
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that graphene synthesized by chemical redox method is prone to irreversible agglomeration in solution in the prior art, the present invention provides a preparation method for growing graphene in situ on graphite fiber

Method used

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  • A kind of preparation method of growing graphene in situ on graphite fiber
  • A kind of preparation method of growing graphene in situ on graphite fiber
  • A kind of preparation method of growing graphene in situ on graphite fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Measure 25g each of concentrated sulfuric acid and hydrofluoric acid, pour the concentrated sulfuric acid and hydrofluoric acid into a beaker, mix the concentrated sulfuric acid and hydrofluoric acid evenly, and configure a mixed solvent with a mass ratio of 1:1.

[0029] (2) Weigh 1 g of graphite fiber and disperse the graphite fiber in a mixed solvent of 50 g of concentrated sulfuric acid and hydrofluoric acid to prepare a solution containing the graphite fiber.

[0030] (3) Place the solution added with graphite fibers in a magnetic stirrer, and stir evenly by magnetic stirring for 4 hours.

[0031] (4) Next, the stirred solution containing the graphene fibers was placed in a hydrothermal reactor for 48 hours of reaction, and the reaction temperature in the hydrothermal reactor was 200°C.

[0032] (5) Finally, filter the solution after the reaction to obtain the generated precipitate, wash the precipitate with deionized water, and dry it to obtain graphene grown ...

Embodiment 2

[0036] (1) Measure 10 g of concentrated sulfuric acid and 50 g of hydrofluoric acid, pour the concentrated sulfuric acid and hydrofluoric acid into a beaker, mix the concentrated sulfuric acid and hydrofluoric acid evenly and configure a mixed solvent with a mass ratio of 1:5, and Measure 50 g from 60 g of the mixed solvent.

[0037] (2) Weigh 1 g of graphite fiber and disperse the graphite fiber in a mixed solvent of 50 g of concentrated sulfuric acid and hydrofluoric acid to prepare a solution containing the graphite fiber.

[0038] (3) Place the solution added with graphite fibers in a magnetic stirrer, and stir evenly by magnetic stirring for 4 hours.

[0039] (4) Next, the stirred solution containing the graphene fibers was placed in a hydrothermal reactor for 48 hours of reaction, and the reaction temperature in the hydrothermal reactor was 200°C.

[0040] (5) Finally, filter the solution after the reaction to obtain the generated precipitate, wash the precipitate with ...

Embodiment 3

[0044] (1) Measure 50 g of vitriol oil, 10 g of hydrofluoric acid, pour the vitriol oil and hydrofluoric acid into a beaker, mix the vitriol oil and hydrofluoric acid evenly and configure a mixed solvent with a mass ratio of 5:1, and Measure 50 g from 60 g of the mixed solvent.

[0045] (2) Weigh 1 g of graphite fiber and disperse the graphite fiber in a mixed solvent of 50 g of concentrated sulfuric acid and hydrofluoric acid to prepare a solution containing the graphite fiber.

[0046] (3) Place the solution added with graphite fibers in a magnetic stirrer, and stir evenly by magnetic stirring for 4 hours.

[0047] (4) Next, the stirred solution containing the graphene fibers was placed in a hydrothermal reactor for 48 hours of reaction, and the reaction temperature in the hydrothermal reactor was 200°C.

[0048] (5) Finally, filter the solution after the reaction to obtain the generated precipitate, wash the precipitate with deionized water, and dry it to obtain graphene g...

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Abstract

A preparation method for growing graphene in situ on graphite fibers. During preparation, firstly take concentrated sulfuric acid with a concentration of 98% and hydrofluoric acid with a concentration of 35% to prepare a mixed solvent of concentrated sulfuric acid and hydrofluoric acid; then The graphite fiber is added to the mixed solvent of concentrated sulfuric acid and hydrofluoric acid to prepare a solution containing graphite fiber, and fully stirred; then, the solution added with graphite fiber is put into a hydrothermal reaction kettle for hydrothermal reaction, and the The solution after the hydrothermal reaction is washed with deionized water and dried to obtain the graphene grown on the graphite fiber in situ. The graphene grown in situ on the graphite fiber prepared by the above method has high purity, graphene grows in situ on the surface of the graphite fiber, is not easy to agglomerate, has good dispersion, and is easy to load the second phase on the surface, which is beneficial to be applied to in supercapacitors and Li-ion batteries.

Description

technical field [0001] The invention relates to a preparation method of graphene, in particular to a preparation method of growing graphene in situ on graphite fibers. Background technique [0002] Since Andre Geim and Konstantin Novoselov, physicists at the University of Manchester in the United Kingdom, successfully separated graphene from graphite and won the Nobel Prize in Physics in 2004, graphene has been widely studied and studied. focus on. The electron mobility of graphene is higher than that of silicon and carbon nanotubes, the resistivity of graphene is lower than that of copper and silver, and it has a high theoretical specific surface area, so that graphene can be used in lithium-ion batteries, Supercapacitors, photocatalysis and other fields have broad application prospects. [0003] At present, the methods for preparing graphene mainly include mechanical exfoliation method, vapor phase deposition method, electrochemical method and chemical redox method. Amo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01P2002/82C01P2004/03C01P2004/04
Inventor 田健胡晓琳崔洪芝魏娜宋晓杰杨鸿儒
Owner SHANDONG UNIV OF SCI & TECH
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