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A kind of method for preparing graphene by redox

A graphene and fossil technology, applied in the field of graphene, can solve the problems of conductivity loss and other problems, and achieve the effects of good conductivity, low energy consumption and low environmental pollution

Active Publication Date: 2019-02-22
湖南烯源新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing graphene by oxidation and reduction, improve the loss of electrical conductivity and other properties due to incomplete reduction, and reduce environmental pollution and energy consumption costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) 5 g of graphite with a purity of 99.5% is added into a mixed solution consisting of 475ml of vitriol oil (98% in mass fraction) and 65% in 120ml of concentrated nitric acid (65% in mass fraction), and the mixture is placed in an ice-water mixing bath environment Stir for 20 minutes, then slowly add 20g of potassium permanganate to the mixture, stir for 1 hour, then heat the mixture to 85°C and keep it for 30 minutes, then add 92ml of deionized water and keep it at 85°C for 30 minutes , finally add 30ml of hydrogen peroxide solution (mass fraction 30%), stir for 10 minutes, suction filter the mixture, then wash the solids with 300ml of dilute hydrochloric acid and 450ml of deionized water successively, wash three times in total, finally the solids Dry in a vacuum oven at 60°C for 12 hours to obtain graphite oxide;

[0021] The prepared graphite oxide was added to deionized water, the solubility of graphite oxide in water was 0.5mg / ml, the mixture of graphite oxide an...

Embodiment 2

[0026] (1) 5 g of graphite with a purity of 99.5% is added into a mixed solution consisting of 475ml of vitriol oil (98% in mass fraction) and 65% in 120ml of concentrated nitric acid (65% in mass fraction), and the mixture is placed in an ice-water mixing bath environment Stir for 20 minutes, then slowly add 20g of potassium permanganate to the mixture, stir for 1 hour, then heat the mixture to 85°C and keep it for 30 minutes, then add 92ml of deionized water and keep it at 85°C for 30 minutes , finally add 30ml of hydrogen peroxide solution (mass fraction 30%), stir for 10 minutes, suction filter the mixture, then wash the solids with 300ml of dilute hydrochloric acid and 450ml of deionized water successively, wash three times in total, finally the solids Dry in a vacuum oven at 60°C for 12 hours to obtain graphite oxide;

[0027] The prepared graphite oxide was added to deionized water, the solubility of graphite oxide in water was 0.5mg / ml, the mixture of graphite oxide an...

Embodiment 3

[0032] (1) 5 g of graphite with a purity of 99.5% is added into a mixed solution consisting of 475ml of vitriol oil (98% in mass fraction) and 65% in 120ml of concentrated nitric acid (65% in mass fraction), and the mixture is placed in an ice-water mixing bath environment Stir for 20 minutes, then slowly add 20g of potassium permanganate to the mixture, stir for 1 hour, then heat the mixture to 85°C and keep it for 30 minutes, then add 92ml of deionized water and keep it at 85°C for 30 minutes , finally add 30ml of hydrogen peroxide solution (mass fraction 30%), stir for 10 minutes, suction filter the mixture, then wash the solids with 300ml of dilute hydrochloric acid and 450ml of deionized water successively, wash three times in total, finally the solids Dry in a vacuum oven at 60°C for 12 hours to obtain graphite oxide;

[0033] The prepared graphite oxide was added to deionized water, the solubility of graphite oxide in water was 0.5mg / ml, the mixture of graphite oxide an...

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Abstract

The invention relates to the technical field of graphene, in particular to a method for preparing graphene by oxidation reduction. The method comprises the following steps: (1) oxidizing and exfoliating graphite to prepare oxidized graphene; (2) adding the oxidized graphene in an aqueous solution of haloid and reacting; (3) forming electrolyte by using a solution obtained from the step (2), taking metal as a cathode, taking a noble electrode as an anode, and electrolyzing the electrolyte for 0.5-1.5 hours under the condition that the voltage is 1V-1.5V to obtain the graphene on the surface of the cathode. The prepared graphene is good in conductivity, is small in environmental pollution, and is simple and practicable, and the quality of the obtained graphene material is high.

Description

Technical field: [0001] The invention relates to the technical field of graphene, in particular to a method for preparing graphene by redox. Background technique [0002] Graphene is a carbon atom with SP 2 The hybridized orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. Graphite nanocrystals with a thickness of 1-10 layers are called graphene. According to the number of carbon atomic layers, or the thickness of graphene, it can be divided into single-layer graphene (Single-layer graphene), double-layer graphene (Double-layer graphene) graphene) and multilayer graphene (Few-layer graphene), when the thickness is more than 10 layers, its performance is basically the same as that of conventional graphite materials. The theoretical specific surface area of ​​single-layer graphene is 2650m 2 / g, the thermal conductivity is as high as 5300W / m K, and the electron mobility is as high as 15000cm at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01P2006/40
Inventor 王文庆
Owner 湖南烯源新材科技有限公司
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