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Green preparation method of high-quality graphene

A graphene, high-quality technology, applied in the field of graphene, can solve the problems of low quality, many redox reaction defects, etc., to achieve the effect of improving reaction efficiency, improving permeability and adsorption, and increasing fragmentation

Active Publication Date: 2018-06-01
丁文辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a green preparation method of high-quality graphene, which solves the problems of many redox reaction defects and low quality in the prior art, and can not only improve the refinement of graphene, but also maintain The characteristics of graphene are suitable for the production of high-quality graphene in large quantities

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Effect test

Embodiment 1

[0033] A kind of green preparation method of high-quality graphene, described preparation method comprises the steps:

[0034] Step 1, adding graphene oxide to absolute ethanol for gradient ultrasonic reaction for 3 hours, and obtaining graphene oxide alcohol solution after cooling;

[0035] Step 2, subjecting the graphene oxide alcohol solution to a sealed microwave reaction for 3 hours, and obtaining a graphene oxide dispersion after cooling;

[0036] Step 3, adding glucose to deionized water, stirring and dissolving, then slowly adding it dropwise to the graphene oxide dispersion, sealing, heating and pressurizing for 2 hours, and sealing and aerating for 3 hours, to obtain the graphene dispersion;

[0037] Step 4, ultrasonicating the graphene dispersion in a water bath for 10 hours, then filtering, washing and drying to obtain graphene.

[0038] The mass concentration of graphene oxide in the dehydrated alcohol in described step 1 is 20g / L.

[0039] The gradient program ...

Embodiment 2

[0049] A kind of green preparation method of high-quality graphene, described preparation method comprises the steps:

[0050] Step 1, adding graphene oxide to absolute ethanol for gradient ultrasonic reaction for 5 hours, and obtaining graphene oxide alcohol solution after cooling;

[0051] Step 2, subjecting the graphene oxide alcohol solution to a sealed microwave reaction for 4 hours, and obtaining a graphene oxide dispersion after cooling;

[0052] Step 3, adding glucose to deionized water, stirring and dissolving, then slowly adding it dropwise to the graphene oxide dispersion, sealing, heating and pressurizing for 4 hours, sealing and aerating for 5 hours, to obtain the graphene dispersion;

[0053] Step 4, ultrasonicating the graphene dispersion in a water bath for 15 hours, then filtering, washing and drying to obtain graphene.

[0054] The mass concentration of graphene oxide in the dehydrated alcohol in described step 1 is 40g / L.

[0055] The gradient program of t...

Embodiment 3

[0065] A kind of green preparation method of high-quality graphene, described preparation method comprises the steps:

[0066] Step 1, adding graphene oxide to absolute ethanol for gradient ultrasonic reaction for 4 hours, and obtaining graphene oxide alcohol solution after cooling;

[0067] Step 2, subjecting the graphene oxide alcohol solution to a sealed microwave reaction for 4 hours, and obtaining a graphene oxide dispersion after cooling;

[0068] Step 3, adding glucose to deionized water, stirring and dissolving, then slowly adding it dropwise to the graphene oxide dispersion, sealing, heating and pressurizing for 3 hours, sealing and aerating for 4 hours, to obtain the graphene dispersion;

[0069] Step 4, ultrasonicating the graphene dispersion in a water bath for 12 hours, then filtering, washing and drying to obtain graphene.

[0070] The mass concentration of graphene oxide in the dehydrated alcohol in described step 1 is 30g / L.

[0071] The gradient program of t...

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Abstract

The invention belongs to the field of graphene and in particular relates to a green preparation method of high-quality graphene. The preparation method comprises the following steps: step 1, adding graphene oxide into absolute ethyl alcohol and carrying out gradient ultrasonic reaction for 3 to 5h; cooling to obtain a graphene oxide alcohol solution; step 2, carrying out sealing microwave reactionon the graphene oxide alcohol solution for 3 to 4h; after cooling, obtaining a graphene oxide dispersion solution; step 3, adding glucose into de-ionized water and stirring and dissolving; slowly dropwise adding into the graphene oxide dispersion solution, and carrying out sealing heating and pressurizing reaction for 2 to 4h and carrying out sealing aeration reaction for 3 to 5h to obtain a graphene dispersion solution; step 4, carrying out water-bath ultrasonic treatment on the graphene dispersion solution for 10 to 15h; filtering, washing and drying to obtain the graphene. By adopting thegreen preparation method provided by the invention, the problems in the prior art that oxidization reduction reaction has more defects and low quality are solved; the refining effect of the graphene can be improved and the property of the graphene can be kept; the green preparation method is applicable to large-batch production of the high-quality graphene.

Description

technical field [0001] The invention belongs to the field of graphene, and in particular relates to a green preparation method of high-quality graphene. Background technique [0002] Graphene is a material with good electrical conductivity composed of a single layer of carbon atoms. It is a two-dimensional material. Due to its two-dimensional structure, graphene is the thinnest single-layer material so far. Although graphene is very thin, graphene has very good hardness. In some electronic information fields, graphene has a very large application demand. The current preparation methods of graphene include chemical vapor deposition method, mechanical exfoliation method, redox method and so on. [0003] The oxidation-reduction method is to oxidize ordinary graphite with a strong oxidant first, so that the interlayer distance becomes larger and easier to separate; then, the oxidized graphite is peeled off by ultrasonic and other methods to obtain graphene oxide; The graphene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19
CPCC01B2204/22C01B2204/24
Inventor 方泽波冀婷
Owner 丁文辉
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