Preparing method for in-situ growth of graphene on graphite fibers

A graphite fiber and in-situ growth technology, which is applied in the field of in-situ growth of graphene on graphite fiber, can solve the problems of irreversible agglomeration and achieve the effect of good conductivity, high purity and few defects

Inactive Publication Date: 2016-06-08
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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  • Preparing method for in-situ growth of graphene on graphite fibers
  • Preparing method for in-situ growth of graphene on graphite fibers
  • Preparing method for in-situ growth of graphene on graphite fibers

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 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 grown...

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Abstract

The invention relates to a preparing method for in-situ growth of graphene on graphite fibers. The preparing method comprises the steps that in the preparing process, firstly, concentrated sulfuric acid with the concentration of 98% and hydrofluoric acid with the concentration of 35% are taken for preparing a mixed solvent of concentrated sulfuric acid and hydrofluoric acid; secondly, graphite fibers are added into the mixed solvent of concentrated sulfuric acid and hydrofluoric acid to prepare a solution containing graphite fibers, and sufficient stirring is carried out; thirdly, the solution with graphite fibers is put into a hydrothermal reaction kettle for a hydrothermal reaction, a solution obtained after the hydrothermal reaction is washed with deionized water, and graphene grown on graphite fibers in situ can be obtained after drying. Graphene, prepared through the method, grown on graphite fibers in situ is high in purity, is grown on the surfaces of graphite fibers in situ, and is not prone to agglomeration and good in dispersibility; in addition a second phase can be easily loaded on the surface of graphene, and thus the graphene can be easily applied to supercapacitors and lithium 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 Applications(China)
IPC IPC(8): C01B31/04
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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