Method for preparing graphene quantum dots under the coupling action of electric field and ultrasonic field

A technology of graphene quantum dots and ultrasonic fields, applied in chemical instruments and methods, electrolytic components, electrolytic processes, etc., to achieve the effect of low energy consumption

Active Publication Date: 2021-04-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can quickly complete the preparation of graphene quantum dots, but still requires a large amount of strong acid, strong base and strong oxidant

Method used

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  • Method for preparing graphene quantum dots under the coupling action of electric field and ultrasonic field
  • Method for preparing graphene quantum dots under the coupling action of electric field and ultrasonic field

Examples

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Effect test

Embodiment 1

[0019] In this example, see figure 1 and figure 2 , a method for preparing graphene quantum dots under the coupled action of an electric field and an ultrasonic field, comprising the steps of:

[0020] a. 4 g of 1-ethyl-3 methylimidazolium tetrafluoroborate, namely [EMIm] BF 4 Dissolve in 100mL deionized water to prepare an electrolyte with a concentration of 0.2mol / L;

[0021] b. the electrolyte 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 the electrolyte in parallel, and the distance between the two graphite electrodes is 3 cm, and the electrochemical reaction is assembled device, and use graphite electrodes as carbon source raw materials;

[0022] c. put the electrolytic cell in the step b into the ultrasonic pool, and set the reaction voltage to 4V according to the type of ionic liquid adopted in the step a, so that the voltage value is controlled at 1-ethyl-3 methyl In th...

Embodiment 2

[0027] This embodiment is basically the same as Embodiment 1, especially in that:

[0028] In this embodiment, a method for preparing graphene quantum dots under the coupling effect of an electric field and an ultrasonic field comprises the following steps:

[0029] a. 4 g of 1-ethyl-3 methylimidazolium tetrafluoroborate, namely [EMIm] BF 4 Dissolve in 100mL deionized water to prepare an electrolyte with a concentration of 0.3mol / L;

[0030] b. the electrolyte 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 the electrolyte in parallel, and the distance between the two graphite electrodes is 3 cm, and the electrochemical reaction is assembled device, and use graphite electrodes as carbon source raw materials;

[0031] c. put the electrolytic cell in the step b into the ultrasonic pool, and set the reaction voltage to 4V according to the type of ionic liquid adopted in the step a, so ...

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 quantum dots under the coupling effect of an electric field and an ultrasonic field comprises the following steps:

[0037] a. 4 g of 1-ethyl-3 methylimidazolium tetrafluoroborate, namely [EMIm] BF 4 Dissolve in 100mL deionized water to prepare an electrolyte with a concentration of 0.1mol / L;

[0038] b. the electrolyte 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 the electrolyte in parallel, and the distance between the two graphite electrodes is 3 cm, and the electrochemical reaction is assembled device, and use graphite electrodes as carbon source raw materials;

[0039] c. put the electrolytic cell in the step b into the ultrasonic pool, and set the reaction voltage to 4V according to the type of ionic liquid adopt...

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Abstract

The invention discloses a method for preparing graphene quantum dots under the coupling action of an electric field and an ultrasonic field. The present invention selects cheap and easily available high-purity graphite electrodes as raw materials, uses disubstituted imidazole ionic liquids as electrolytes, and prepares water-soluble graphene quantum dots under the coupling action of electric field and ultrasonic field at room temperature. The graphite electrode of the present invention prepares graphene quantum dots under the coupling action of an electric field and an ultrasonic field in an electrolyte, and the electrolyte is a disubstituted imidazole ionic liquid. The method of the present invention 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 preparation method of a graphene quantum dot, which is applied in the technical field of carbon nanomaterials. Background technique [0002] Graphene refers to a two-dimensional honeycomb hexagonal lattice material composed of planar single-layer carbon atoms hybridized by sp2 and closely combined. This special structure endows graphene with excellent properties. Because the connection between carbon atoms is very flexible, when there is an external mechanical force, the graphene plane will automatically bend and deform without rearranging the carbon atoms. Therefore, graphene can always maintain a stable structure, making it the hardest material with a strength of 130Gpa, more than 100 times that of steel. The carbon atoms in the graphene plane have π orbitals, and the electrons of each carbon atom are in a delocalized state and can move freely. Therefore, graphe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/135C09K11/65B82Y40/00
CPCB82Y40/00C09K11/65C25B1/00
Inventor 甄强谢佳姮陈来
Owner SHANGHAI UNIV
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