Preparation method of low-cost large-batch graphene

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

Active Publication Date: 2019-02-19
HARBIN INST OF TECH
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 compli

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of low-cost large-batch graphene
  • Preparation method of low-cost large-batch graphene
  • Preparation method of low-cost large-batch graphene

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0015] Specific embodiment one: the preparation method of a kind of low-cost large-scale graphene of the present embodiment, it is to carry out according to the following steps:

[0016] 1. Add the matrix alloy into the crucible to melt, and adjust the temperature of the molten alloy to 550-750°C;

[0017] 2. Pass the gas with a flow rate of 300-10000mL / min into the molten alloy, and continuously carry out mechanical stirring during the process of passing the gas, and the stirring speed is 500-5000r / min;

[0018] 3. After the gas is introduced, the composite melt is solidified, the base alloy is corroded by dilute sulfuric acid with a volume concentration of 5% to 20%, and the impurities in the graphene solution are removed by suction filtration for many times, and the graphene is obtained after vacuum drying Powder;

[0019] The base alloy is pure magnesium, magnesium-zinc alloy, magnesium-calcium alloy or magnesium-lithium alloy; the gas is CO 2 Gas mixed with nitrogen in ...

specific Embodiment approach 2

[0020] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass ratio of the mass of graphene generated to the magnesium participating in the reaction in the matrix alloy is 1:4. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the temperature of the alloy in the molten state is adjusted to 550-625°C. It is the same as the first embodiment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of low-cost large-batch graphene, relates to a preparation method of a nano carbon structural material, and aims at solving the problems of complicated procedures, strict demands on production equipment, high technological difficulty and high cost of high-quality graphene preparation. The method comprises the steps that carbon dioxide is introduced to semi-solidified or liquefied magnesium alloy, and the reaction of Mg+CO2=MgO+C between the carbon dioxide and the magnesium takes place. A carbon product generated in the reaction is the graphene. Finally the contained graphene and alloy are dissolved by using dilute sulphuric acid, suction filtration is conducted for multiple times to remove impurities, and the graphene is obtained after drying isconducted. According to the method, the graphene is prepared through a magnesium thermal reduction method, the problems of difficult graphene preparation and high cost are solved, and the low-cost high-batch graphene can be produced in a large scale. The method is applied to the field of nano material synthesis.

Description

technical field [0001] The invention relates to a preparation method of a nano carbon structure material. It belongs to the field of nanomaterial synthesis. Background technique [0002] Graphene is a two-dimensional material with a single-layer sheet structure composed of carbon atoms. Because of its high strength, high thermal conductivity, high electrical conductivity, and high specific surface area, graphene has attracted extensive attention from researchers. Graphene has great application value in the fields of conductive electrodes, ion batteries, supercapacitors and composite material reinforcements. At present, the methods for preparing graphene mainly include mechanical exfoliation, crystal epitaxial growth, chemical vapor deposition, and thermal expansion of graphite oxide. The mechanical exfoliation method has a long production cycle, low preparation efficiency, and poor quality of graphene. Crystal epitaxial growth method and chemical vapor deposition are comp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01B32/184
CPCC01B32/184C01B2204/04C01B2204/30C01B2204/32
Inventor 王晓军李雪健
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap