A kind of preparation method of multilayer graphene

A multi-layer graphene and graphite technology, applied in graphene, chemical instruments and methods, nano-carbon, etc., can solve problems such as inability to obtain performance and matching

Active Publication Date: 2020-07-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But for natural or artificial graphite, the only processing methods that can be applied are mechanical

Method used

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  • A kind of preparation method of multilayer graphene
  • A kind of preparation method of multilayer graphene
  • A kind of preparation method of multilayer graphene

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preparation example Construction

[0037] The preparation method of multilayer graphene of the present invention mainly comprises the steps:

[0038] A. Put the graphite into the ultrasonic device, and use the cavitation effect for ultrasonic treatment;

[0039] B, putting the graphite after the above-mentioned ultrasonic treatment into a high-pressure device for pressurization;

[0040] C. Pumping the above-mentioned pressure-treated graphite into a vacuum tank to dissociate between the (001) crystal planes of the above-mentioned graphite to obtain graphite in flake layers.

[0041] Further, in order to obtain dry multilayer graphene, the graphite treated in step C can be dried.

[0042] In a preferred embodiment of the present invention, step A is to disperse graphite in a liquid, such as water (such as distilled water) or an organic solvent (such as ethanol, acetone, etc.), and then put it into an ultrasonic device, using ultrasonic Cavitation effect, when the sound wave passes through the liquid, the soun...

Embodiment 1

[0053] Adopt natural graphite ore produced in Shandong, select graphite crystals with a graphite crystal size greater than 1 square centimeter, gently break these graphites into graphite flake crystals with a wooden stick, weigh 100 grams, put into a 5000ml flask, and add 5000ml of distilled water. Insert an ultrasonic generator into the mouth of the flask, turn on the power supply, and start ultrasonic treatment. After 15 minutes, take out the ultrasonic generator, pour the material in the bottle into a 5000ml high-pressure reactor, close the reactor, and then reduce the pressure by adding distilled water. Increase to 25Mpa and keep the pressure for 10 minutes. The outlet of the reaction kettle is connected to the feed pipe of the miniature high-pressure diaphragm pump in advance, and the discharge pipe of the diaphragm pump is connected to the vacuum tank. After 10 minutes, the diaphragm pump was started, and the materials in the reactor were pumped into the vacuum tank at h...

Embodiment 2

[0056] Adopt natural graphite ore produced in Shandong, select graphite crystals with a graphite crystal size greater than 1 square centimeter, gently break these graphites into graphite flake crystals with a wooden stick, weigh 100 grams, put into a 5000ml flask, and add 5000ml of distilled water. Insert an ultrasonic generator into the mouth of the flask, turn on the power supply, and start ultrasonic treatment. After 15 minutes, take out the ultrasonic generator, pour the material in the bottle into a 5000ml high-pressure reactor, close the reactor, and then reduce the pressure by adding distilled water. Increase to 25Mpa and keep the pressure for 10 minutes. The outlet of the reaction kettle is connected to the feed pipe of the miniature high-pressure diaphragm pump in advance, and the discharge pipe of the diaphragm pump is connected to the vacuum tank. After 10 minutes, the diaphragm pump was started, and the materials in the reactor were pumped into the vacuum tank at h...

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Abstract

The invention discloses a preparing method for multilayer graphene. The method includes the following steps that 1, graphite is placed into an ultrasonic device and is ultrasonically treated with the cavitation effect; 2, the graphite treated ultrasonically is placed into a high-pressure device to be treated in a pressurizing mode; 3, the graphite treated in the pressurizing mode is pumped into a vacuum tank so that crystal faces of the graphite (001) can dissociate to obtain slice-layer graphite. The method is mild in operation conditions, investment cost and production cost are small, the process is simple and easy to control, and the preparing method for new graphene and extremely thin graphene slices is suitable for application and popularization at home and abroad.

Description

technical field [0001] The invention relates to the technical field of preparation of graphene and ultra-thin graphite sheets, in particular to a new method for preparing graphene by using artificial graphite or natural graphite. Background technique [0002] Graphene is a two-dimensional crystal composed of carbon atoms with only one atomic thickness. It is a general term for single-layer graphene, double-layer graphene and multilayer graphene. Single-layer graphene refers to a two-dimensional carbon material composed of a layer of carbon atoms closely packed periodically in a benzene ring structure (ie, a hexagonal honeycomb structure). Double-layer graphene refers to a two-dimensional carbon material composed of two layers of carbon atoms that are periodically and closely packed in a benzene ring structure (ie, a hexagonal honeycomb structure) in different stacking ways. Few-layer graphene refers to a two-dimensional carbon material composed of 3-10 layers of carbon atom...

Claims

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Application Information

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IPC IPC(8): C01B32/19
CPCC01B2204/04C01P2004/04
Inventor 毕舒
Owner SOUTH CHINA UNIV OF TECH
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