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Method for preparing graphene under coupling effect of electric field and ultrasonic field

A technology of ultrasonic field and graphene, applied in the field of carbon nanomaterials, can solve the problems of danger and high energy consumption, and achieve the effect of low cost and low energy consumption

Inactive Publication Date: 2019-03-22
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can use renewable biomass as a carbon source and heat it suddenly in air or vacuum to form a graphene membrane material, but the reaction needs to be carried out at a high temperature of 650-900°C, which is dangerous and consumes a lot of energy.

Method used

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  • Method for preparing graphene under coupling effect of electric field and ultrasonic field

Examples

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Effect test

Embodiment 1

[0018] In this example, see figure 1 , a method for preparing graphene under the coupled action of an electric field and an ultrasonic field, comprising the steps of:

[0019] a. Dissolve 7.584g of triethylmethylammonium chloride in 500mL of deionized water to prepare an electrolyte with a concentration of 0.1mol / L;

[0020] b. the electrolytic solution prepared in the step a is placed in the electrolytic cell, and two graphite sheets with a purity of 99.9% are used as electrodes, inserted in parallel in the electrolytic solution, so that the distance between the two graphite electrodes is 3cm, and the assembled electrochemical Reaction device, and use graphite electrode as carbon source raw material;

[0021] c. put the electrolytic cell in the step b into the ultrasonic pool, set the reaction voltage to 10V, set the frequency to 0.1Hz, and the ultrasonic power to 30W, turn on the electric field and the ultrasonic field at the same time, and apply the electric field and the ...

Embodiment 2

[0026] This embodiment is basically the same as Embodiment 1, especially in that:

[0027] In this embodiment, a method for preparing graphene under the coupling effect of an electric field and an ultrasonic field comprises the following steps:

[0028] a. Dissolve 5.48g of tetramethylammonium chloride in 500mL of deionized water to prepare an electrolyte with a concentration of 0.1mol / L;

[0029] b. the electrolytic solution prepared in the step a is placed in the electrolytic cell, and two graphite sheets with a purity of 99.9% are used as electrodes, inserted in parallel in the electrolytic solution, so that the distance between the two graphite electrodes is 3cm, and the assembled electrochemical Reaction device, and use graphite electrode as carbon source raw material;

[0030] c. put the electrolytic cell in the step b into the ultrasonic pool, set the reaction voltage to 10V, set the frequency to 0.1Hz, and the ultrasonic power to 30W, turn on the electric field and th...

Embodiment 3

[0035] This embodiment is basically the same as the previous embodiment, and the special features are:

[0036] In this embodiment, a method for preparing graphene under the coupling effect of an electric field and an ultrasonic field comprises the following steps:

[0037] a. Dissolve 9.285g of benzyltrimethylammonium chloride in 500mL of deionized water to prepare an electrolyte with a concentration of 0.1mol / L;

[0038] b. the electrolytic solution prepared in the step a is placed in the electrolytic cell, and two graphite sheets with a purity of 99.9% are used as electrodes, inserted in parallel in the electrolytic solution, so that the distance between the two graphite electrodes is 3cm, and the assembled electrochemical Reaction device, and use graphite electrode as carbon source raw material;

[0039] c. put the electrolytic cell in the step b into the ultrasonic pool, set the reaction voltage to 10V, set the frequency to 0.1Hz, and the ultrasonic power to 30W, turn on...

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Abstract

The invention discloses a method for preparing graphene under the coupling effect of an electric field and an ultrasonic field. According to the method, a cheap and easily-obtained high-purity graphite electrode is taken as a raw material, a quaternary ammonium salt is taken as an electrolyte, and the graphene is prepared under the coupling effect of the electric field and the ultrasonic field atroom temperature. Substances such as strong acid, strong alkali and strong oxidants are not used, the damage on the structure of the graphene is relatively little, and the method is simple and safe. According to the method, graphene quantum dots are prepared by using the graphite electrode in the electrode under the coupling effect of the electric field and the ultrasonic field, the electrolyte isa quaternary ammonium salt solution, and the method is green, environmentally-friendly, simple and safe, and has large-scale production potential.

Description

technical field [0001] The invention relates to a preparation method of a graphene material, in particular to a method for preparing graphene by an electrochemical process, which is applied in the technical field of carbon nanomaterials. Background technique [0002] In 2004, Geim et al. discovered that graphene (Graphene, also known as single-layer graphite or two-dimensional graphite) is a hexagonal honeycomb two-dimensional material composed of sp2 hybridized carbon atoms. This special structure endows graphene with excellent properties. performance. The theoretical specific surface area of ​​graphene is as high as 2630m 2 g -1 , its monolayer thickness is only 0.335nm, the intensity is 130GPa, and the carrier mobility is 15000cm 2 ·V -1 ·S -1 , thermal conductivity is 5000W·m -1 ·K -1 , has the characteristics of high strength, high thermal conductivity, high electrical conductivity and chemical inertness. In addition, graphene also has special properties such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
CPCC01B2204/04C01B32/184
Inventor 甄强谢佳姮陈来
Owner SHANGHAI UNIV
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