Method for preparing graphene by using magnetic rotating arc

A technology of magnetic rotation and graphene, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of undiscovered graphene, etc., and achieve the effect of good crystal form, simple equipment and large output

Inactive Publication Date: 2019-03-29
合肥碳艺科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, no research report on the preparation of graphene by magnetic rotating arc has been found in the literature at home and abroad.

Method used

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  • Method for preparing graphene by using magnetic rotating arc
  • Method for preparing graphene by using magnetic rotating arc
  • Method for preparing graphene by using magnetic rotating arc

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The diameter of the cathode of the magnetic rotating arc generator is 10mm, the inner diameter of the anode is 40mm, the material is graphite, and the magnetic field is 0.1T. The magnetic rotating arc working medium gas is a mixed gas of argon and hydrogen, wherein the flow rate of argon is 40slm, and the flow rate of hydrogen is 8slm; the raw material is methane, and the flow rate is 5slm. The magnetic rotating arc discharge current is 100 amperes, the arc rotating speed is about 500 rpm, the arc power is 5.5 kW, and the magnetic rotating arc generator / reactor pressure is 1 bar. After the magnetic rotating arc was operated stably for 5 minutes under the mixed gas atmosphere of argon and hydrogen, methane was fed into the magnetic rotating arc generator, and after 10 minutes of treatment, a total of 12 g of solid products were collected on the inner wall of the reactor.

[0030] figure 2 and image 3 Scanning and transmission electron microscopy images of products co...

Embodiment 2

[0032]The diameter of the cathode of the magnetic rotating arc generator is 5mm, the inner diameter of the anode is 30mm, the materials are all stainless steel, and the magnetic field is 0.14T. The magnetic rotating arc working medium gas is a mixed gas of argon and nitrogen, wherein the flow rate of argon gas is 15slm, and the flow rate of nitrogen gas is 5slm; the raw material is propane, and the flow rate is 0.3slm. The magnetic rotating arc discharge current is 0.2 ampere, the arc rotating speed is about 60 rpm, the arc power is about 100 watts, and the magnetic rotating arc generator / reactor pressure is 1 bar. After the magnetic rotating arc was operated stably for 3 minutes under the mixed gas atmosphere of argon and nitrogen, propane was passed into the magnetic rotating arc generator, and after 20 minutes of treatment, a total of 2 g of solid products were collected on the inner wall of the reactor.

[0033] Scanning and transmission electron microscopy images of the p...

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Abstract

The invention discloses a method for preparing graphene by using magnetic rotating arc, and belongs to the technical field of carbon nano-material preparation. The method adopts the magnetic rotatingarc as a reaction condition and a hydrocarbon compound as a raw material. The magnetic rotating arc is ignited in argon or a mixed gas atmosphere of argon and other gases, then a certain molar flow ofa hydrocarbon compound is continuously introduced into the arc region, the hydrocarbon compound is reacted under the initiation of the arc to generate graphene, hydrocarbon products, hydrogen and other products, and the solid product obtained after the reaction is collected to obtain the graphene. A result of characterization with a transmission electron microscope shows that the layer number ofthe prepared graphene is 3-10, and the size of graphene sheets is 100-300 nm. The method has the advantages of low energy consumption, large output, realization of high purity, good crystal form and few defects of the prepared graphene, simple device, low cost, no catalyst, continuousness in reaction, easiness in operation, and easiness in realization of industrialized production.

Description

technical field [0001] The invention belongs to the technical field of graphene preparation, and in particular relates to a method for preparing graphene by using a magnetic rotating arc. Background technique [0002] Graphene is a carbon atom by sp 2 A nano-film material with a two-dimensional honeycomb network structure formed by hybridization. The unique two-dimensional structure endows it with excellent physical, chemical and mechanical properties. For example: (1) high specific surface area (the theoretical specific surface area of ​​single-layer graphene is as high as 2600m 2 g -1 ); (2) Conductivity up to 5000Wm -1 K -1 , electron mobility up to 200000cm 2 V -1 the s -1 ; (3) High elastic modulus (1100GPa) and breaking strength (125GPa); (4) High light transmittance: the light transmittance in the wavelength range of 100-300nm exceeds 95%; (5) Quantum Hall is observed at room temperature effect. Based on these excellent properties, graphene has a wide range ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
CPCC01B32/184C01B32/198
Inventor 王城夏维东孙路夏维珞宋宗徽
Owner 合肥碳艺科技有限公司
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