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A low-cost and large-scale preparation method of graphene

A graphene, large-scale technology, applied in graphene, chemical instruments and methods, nano-carbon, etc., can solve problems such as high cost, technical difficulty, and complex process

Active Publication Date: 2022-03-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a new method for preparing graphene in order to solve the problems of complicated process for preparing high-quality graphene, strict requirements on production equipment, high technical difficulty and high cost

Method used

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  • A low-cost and large-scale preparation method of graphene
  • A low-cost and large-scale preparation method of graphene
  • A low-cost and large-scale preparation method of graphene

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specific Embodiment approach 1

[0015] DETAILED DESCRIPTION OF THE INVENTION A method of preparing a low-cost massive graphene in this embodiment, which is carried out in accordance with the following steps:

[0016] First, the base alloy is added to the crucible, and the alloy temperature of the molten state is adjusted to 550-750 ° C;

[0017] Second, a gas having a flow rate of 300 to 10,000 ml / min is introduced into a molten alloy, and mechanical stirring is continuously carried out during the gas process, and the stirring speed is 500-5000 r / min;

[0018] Third, after passing into the gas, the composite melt is solidified, and the substrate alloy is etched off with a volume concentration of 5% to 20%, and the filtration in the graphene solution is removed, and the graphene is obtained. Powder;

[0019] The matrix alloy is pure magnesium, magnesium-zinc alloy, magnesium moxia or magnesium alloy; the gas is CO 2 Gas and nitrogen in accordance with the mixed gas, CO 2 Gas and rare gas are mixed with a mixe...

specific Embodiment approach 2

[0020] DETAILED DESCRIPTION OF THE INVENTION Twitter: This embodiment differs from the specific embodiment in that the mass ratio of the mass of graphene and the mass alloy is generated from 1: 4. Others are the same as those of the specific embodiments.

specific Embodiment approach 3

[0021] BEST MODE FOR CARRYING OUT THE INVENTION 3: The present embodiment differs from the specific embodiment in that the alloy temperature of the molten state is adjusted to 550-625 ° C. It is identical to the specific embodiment.

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Abstract

A method for preparing graphene in large quantities at low cost, which relates to a method for preparing nano-carbon structure materials. The purpose of the present invention is to solve the problems of complex process for preparing high-quality graphene, strict requirements on production equipment, high technical difficulty and high cost. The experiment passes carbon dioxide into a semi-solid or liquid magnesium alloy, and carbon dioxide and magnesium react Mg+CO 2 =MgO+C. The carbon product produced by the reaction is graphene. Finally, dilute sulfuric acid is used to dissolve the alloy containing graphene, and the graphene is obtained after repeated suction filtration to remove impurities and drying. The invention prepares graphene through the magnesia thermal reduction method, solves the problems of difficulty in graphene preparation and high cost, and can prepare low-cost and high-quality graphene in large-scale production. The invention is applied in the field of nano material synthesis.

Description

Technical field [0001] The present invention relates to a method of preparing a nanocarbon structure material. It belongs to the field of nanomaterial synthesis. Background technique [0002] Graphite is a single-layer sheet-like structured two-dimensional material composed of carbon atoms because graphene has high strength, high thermal conductivity, high electrical conductivity, and high ratio of high-proportioned values, and the extensive attention of researchers. Graphite has a huge application value in the fields of conductive electrodes, ion batteries, supercapacitors and composite enhancements. At present, the method of preparing graphene is mainly mechanical stripping method, crystalline epitaxial growth method, chemical vapor deposition method, and graphite thermal expansion method. The mechanical peeling method is long, the production period is low, the preparation is low, and the quality of graphene is poor. Crystal epitaxial growth method and chemical vapor deposition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01B32/184C01B2204/04C01B2204/30C01B2204/32
Inventor 王晓军李雪健
Owner HARBIN INST OF TECH
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