Graphene nanoribbon preparation method

A technology of graphene nanobelts and carbon nanowalls, applied in the field of synthesis of nanocarbon materials, can solve the problem of low electrical conductivity

Active Publication Date: 2014-07-23
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there are still many defects in graphene nanoribbons, resulting in low electrical conductivity.

Method used

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  • Graphene nanoribbon preparation method

Examples

Experimental program
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Effect test

preparation example Construction

[0024] like figure 1 Shown, the preparation method of the graphene nanoribbon of one embodiment, comprises the steps:

[0025] Step S110: Etching the metal substrate in an acid solution with a concentration of 0.01mol / L-1mol / L for 0.5-10 minutes; heating the etched metal substrate to 600°C-900°C under oxygen-free conditions , use ultraviolet light to irradiate the surface of the metal substrate, and pass through carbon-containing gas and protective gas, and keep it for 30 minutes to 300 minutes. After the reaction, carbon nanowalls are obtained on the surface of the metal substrate; wherein, the flow rate of the carbon-containing gas It is 10 sccm (standard state milliliter per minute) ~ 1000 sccm, and the flow ratio of carbon-containing gas to protective gas is 2 ~ 10:1. After the reaction is completed, the carbon-containing gas is stopped, the heating and the ultraviolet light irradiation are stopped, and after cooling to room temperature, a carbon nanometer wall is obtaine...

Embodiment 1

[0048] The preparation of the graphene nanobelt of the present embodiment is as follows:

[0049] (1) Preparation of carbon nanowalls: (a) Put the nickel foil in a hydrochloric acid solution with a concentration of 1mol / L and etch it for 0.5 minutes, and then wash it with deionized water, ethanol, and acetone in sequence after etching; (b) wash the Put the finished nickel foil into the reaction chamber, and remove the air in the reaction chamber, heat the nickel foil to 900°C, then turn on the ultraviolet light source equipment, let the ultraviolet light irradiate the surface of the nickel foil, and then pass in methane and nitrogen to keep For 100 minutes, the flow rate of methane steam was 200 sccm, and the flow ratio of methane steam to nitrogen was 2:1. After the reaction was completed, stop feeding methane steam, stop heating the nickel foil, and turn off the light source equipment. After cooling down to room temperature, the nitrogen gas flow was stopped, and the carbon ...

Embodiment 2

[0055] The preparation of the graphene nanobelt of the present embodiment is as follows:

[0056] (1) Preparation of carbon nanowalls: (a) Put the iron foil in a sulfuric acid solution with a concentration of 0.5mol / L to etch for 4 minutes, and wash it with deionized water, ethanol, and acetone in sequence after etching; (b) Put the cleaned iron foil into the reaction chamber, and remove the air in the reaction chamber, heat the iron foil to 600°C, then turn on the ultraviolet light source equipment, let the ultraviolet light irradiate the surface of the iron foil, and then pass in ethane vapor and argon for 200 minutes, wherein the flow of ethane steam is 100 sccm, and the flow ratio of ethane steam to argon is 5:1. After the reaction is completed, stop feeding ethane steam and stop heating the iron foil , and turn off the light source equipment, after the reaction chamber is cooled to room temperature, stop feeding argon gas, obtain the carbon nanowall of this embodiment on ...

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Abstract

The present invention relates to a graphene nanoribbon preparation method, which comprises steps as follows: etching a metal substrate in an acid solution; then heating the etched metal substrate to between 600 and 900 DEG C under anaerobic conditions, exposing the metal substrate to ultraviolet radiation under flux of a carbon-containing gas and a protective gas; after the reaction, obtaining carbon nanowalls on the surface of the metal substrate; mixing the carbon nanowalls and a chloride intercalating agent at a mass ratio of 1 : (0.8 to 1.2), heating to between 460 and 550 DEG C, and maintaining the temperature and reacting for 2 hours to 6 hours to obtain the chloride intercalated carbon nanowalls; and mixing the chloride intercalated carbon nanowalls and an ionic liquid at a volume / mass ratio of 1 g: 10 ml to 100 ml, and processing the mixture in an alternating electric field with intensity of 50 V / m to 5000 V / m for 10 minutes to 30 minutes to obtain a reaction solution, which is filtered to obtain graphene nanoribbons. The graphene nanoribbons prepared by the method mentioned above have high electrical conductivity.

Description

technical field [0001] The invention relates to the field of synthesis of nano-carbon materials, in particular to a method for preparing graphene nanobelts. Background technique [0002] Types of carbon materials include zero-dimensional fullerenes (C 60 etc.), one-dimensional carbon nanotubes, carbon nanofibers, etc., two-dimensional graphene, three-dimensional graphite, diamond, etc., carbon nanowall (carbon nanowall, CNW) is a carbon nanostructure with two-dimensional diffusion. The typical morphology is a wall-like structure that grows perpendicular to the surface of the substrate material and is thicker than graphene. It is completely different from the characteristics of fullerene, carbon nanotubes, graphene, etc., and can be used as a raw material for preparing other carbon materials. [0003] Before the discovery of graphene, people began to study the preparation of carbon nanowalls. In 2002, there were reports on the preparation of carbon nanowalls and their relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00C01B32/19
Inventor 周明杰袁新生王要兵吴凤
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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