Method and device for preparing graphene based on detonation process

A graphene and detonation technology, which is applied in the field of large-scale graphene preparation based on detonation technology, can solve the problems of high cost restricting the development of graphene materials, expensive single crystal SiC substrates, and harsh preparation process conditions, etc., to achieve large-scale The effect of large-scale production, good consistency and simple equipment structure

Active Publication Date: 2018-12-07
王联盟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of preparing graphene by redox method is low, but the prepared graphene has many defects, which seriously affects its performance
SiC epitaxy can prepare large-area single-layer graphene, but factors such as harsh preparation process conditions, complex equipment, and expensive single-crystal SiC substrates limit the industrialization of this method.
The chemical vapor deposition method has the advantages of high quality, controllable layer number, and large size of the prepared graphene film, but its high cost still restricts the development of graphene materials.

Method used

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  • Method and device for preparing graphene based on detonation process
  • Method and device for preparing graphene based on detonation process
  • Method and device for preparing graphene based on detonation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] see figure 1 , figure 2 , Figure 2A , Figure 2B As shown, using acetylene gas as the carbon source gas to prepare graphene

[0096] Step 1, gas source preparation;

[0097] Acetylene gas with a purity ≥ 99.99% is selected as the carbon source, and oxygen with a purity ≥ 99.99% is selected as the deflagration aid;

[0098] Open the carbon source gas valve 1 and the oxygen valve 2; adjust the flow rate of the carbon source gas flow meter 3 and the flow rate of the oxygen flow meter 4;

[0099] Close material valve 6;

[0100] The air pressure in the mixing chamber 5 monitored by the first air gauge 15 is 1MPa;

[0101] Control makes acetylene and oxygen flow in the mixing chamber 5 according to the molar volume ratio of 2:1; The volume of mixing chamber 5 is 50 liters;

[0102] Step 2, catalyst installation;

[0103] Select the detonation synthesis chamber 7 with a volume of 20 liters; open the top cover of the detonation synthesis chamber 7, take by weighing 2...

Embodiment 2

[0123] Preparation of graphene using methane gas as carbon source gas

[0124] Step 1, gas source preparation;

[0125] Choose methane gas with a purity of ≥99.99% as the carbon source, and oxygen with a purity of ≥99.99% as the deflagration aid;

[0126] Open the carbon source gas valve 1 and the oxygen valve 2; adjust the flow rate of the carbon source gas flow meter 3 and the flow rate of the oxygen flow meter 4;

[0127] Close material valve 6;

[0128] It is 0.8MPa to monitor the air pressure in the mixing chamber 5 by the first air gauge 15;

[0129] Control makes methane and oxygen flow in the mixing chamber 5 according to the molar volume ratio of 4:1;

[0130] Step 2, catalyst installation;

[0131] Select the detonation synthesis chamber 7 of volume 20 liters for use; Open the top cover of detonation synthesis chamber 7, 15 grams of purity 99.5%, the iron powder of particle diameter 30~50 microns is evenly sprinkled on the bottom of detonation synthesis chamber a...

Embodiment 3

[0147] Preparation of Graphene Using Cyclohexane as Carbon Source Gas

[0148] Step 1, gas source preparation;

[0149] Choose cyclohexane with a purity ≥99.99% as the carbon source, first heat the cyclohexane to 95°C to make it completely vaporized into gas, and the gas pipeline components and mixing chamber 5 also need to be preheated with an electric heating belt auxiliary heating system to 95°C; choose oxygen with a purity ≥99.99% as a deflagration aid;

[0150] Open the carbon source gas valve 1 and the oxygen valve 2; adjust the flow rate of the carbon source gas flow meter 3 and the flow rate of the oxygen flow meter 4;

[0151] Close material valve 6;

[0152] The air pressure in the mixing chamber 5 monitored by the first air gauge 15 is 1MPa;

[0153] Hexanaphthene and oxygen controlled to vaporize into gas flow into the mixing chamber 5 according to the molar volume ratio of 2:1;

[0154] Step 2, catalyst installation;

[0155] Open the top cover of the detonat...

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Abstract

The invention discloses a method for industrially producing graphene based on a detonation process and a device for preparing large-sized graphene. According to the method, a gaseous hydrocarbon is utilized as a carbon source and mixed with a certain proportion of oxygen, which are filled in a sealed detonation special device; an appropriate amount of solid metal or non-metal compounds are added as a catalyst; a mixed gas is preheated to a certain temperature and pressure, and is ignited by ignition of a high-energy ignition device; and condensed carbon and free carbon decomposed by hydrocarbons under high temperature and high pressure self-assemble into graphene, and oxygen components and hydrogen components are combined to form water vapor. Raw materials used by the method are low in cost; prepared graphene has no surface functional group, and is controllable in number of layers and in area, and the yield of the graphene yield is up to 30%-60%; and the method is extremely suitable for industrial scale production and application.

Description

technical field [0001] The present invention relates to a kind of preparation of graphene, more particularly, refers to a kind of method and device based on detonation technology to prepare large-scale graphene. Background technique [0002] In recent years, graphene materials have been at the forefront of technological innovation. Because of its excellent electrical conductivity, ultra-high electron mobility and specific surface area, high thermal conductivity, high light transmission, high fracture strength and good chemical stability, it is known as the magic material of the 21st century. It is widely used in many technical fields. The application prospect is extremely broad. [0003] At present, the main preparation methods of graphene are: mechanical exfoliation method, chemical exfoliation method, redox method, SiC epitaxy method, chemical vapor deposition method, etc. The mechanical exfoliation method is simple and easy to operate, and the prepared graphene is of hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
CPCC01B32/184
Inventor 王联盟薛亦德田广科
Owner 王联盟
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