Graphene nanoribbons and preparation method thereof

A graphene nanoribbon and carbon nanowall technology, applied in coatings, electrolytic components, gaseous chemical plating, etc., can solve the problems of difficulty in controlling the size of graphene nanoribbons, low yield, CNW structure damage, etc., and save research and development. The effect of equipment cost, lower reaction temperature, and structural integrity

Inactive Publication Date: 2014-07-16
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether it is the early preparation method or the recent preparation method, it will involve the reaction in the plasma atmosphere, which will cause certain damage to the structure of CNW.
In addition, there are problems of difficult size control and low yield during the preparation of graphene nanoribbons, which also limit its application.

Method used

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  • Graphene nanoribbons and preparation method thereof
  • Graphene nanoribbons and preparation method thereof
  • Graphene nanoribbons and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0027] The preparation process of the graphene nanoribbon of the present invention is roughly divided into the following steps.

[0028] 1. Etching the substrate: put the substrate in a dilute acid solution with a concentration of 0.01-1 mol / L for 0.5-10 minutes, and clean it with deionized water, ethanol and acetone after etching.

[0029] The purpose of this step is to effectively improve the surface structure of the metal substrate by etching the metal substrate to cause defects on the etched surface of the metal substrate, so that carbon nano-walls can grow on the surface of the metal substrate.

[0030] Wherein, the preferred time for etching the metal substrate is 60-180 seconds, and the preferred acid concentration for etching the metal substrate is 0.1-0.5 mol / L. The above preferred etching conditions can achieve a good etching effect and improve the growth efficiency of carbon nanowalls.

[0031] 2. Preparation of carbon nanowalls: put the cleaned substrate into the ...

Embodiment 1

[0041] Example 1: 1. Etching the substrate: The nickel foil was placed in a dilute hydrochloric acid solution with a concentration of 1 mol / L for 0.5 minutes to be etched.

[0042] 2. Preparation of carbon nano-wall: put the cleaned nickel foil into the reaction chamber and remove the air in the reaction chamber, heat the nickel foil to 900°C, and then turn on the ultraviolet light source equipment, so that the ultraviolet light is irradiated on the surface of the nickel foil , and then introduced carbonaceous material methane (flow rate of 200sccm) and protective gas nitrogen, the volume ratio of methane and nitrogen was 2:1, and kept for 100 minutes.

[0043] After the reaction is completed, stop feeding the carbonaceous material, stop heating the nickel foil and turn off the light source equipment. After the reaction chamber is cooled to room temperature, stop feeding nitrogen. The carbon nano-wall can be obtained on the surface of the nickel foil and scrape it from the surf...

Embodiment 2

[0045] Example 2: 1. Etching the substrate: put the iron foil into a dilute sulfuric acid solution with a concentration of 0.5 mol / L and etch for 4 minutes. After the etching is completed, wash with deionized water, ethanol and acetone in sequence.

[0046] 2. Preparation of carbon nano-walls: put the cleaned iron foil into the reaction chamber and remove the air in the reaction chamber, heat the iron foil to 600°C, and then turn on the ultraviolet light source equipment to irradiate the surface of the iron foil with ultraviolet light , and then passed carbon-containing ethane (flow rate of 100sccm) and protective gas argon, the volume ratio of ethane to argon was 5:1, and kept for 200 minutes.

[0047] After the reaction is completed, stop feeding carbon-containing substances, 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, and carbon nanowalls can be obtained on the surface o...

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Abstract

The invention relates to graphene nanoribbons and a preparation method thereof. The preparation method comprises the following steps: taking a strip-shaped carbon nano wall sheet as a working electrode, a lead plate as a counter electrode, Hg/Hg2SO4 as a reference electrode, and an ionic liquid as an electrolyte solution; completely immersing the working electrode, the counter electrode and the reference electrode in the electrolyte solution of an electrolytic bath, applying a voltage of 0.1 to 20 V to the working electrode, keeping for 0.1 to 10 hours, then applying a reverse voltage of -20 to -0.1 V, keeping for 0.1 to 10 hours, and thus obtaining a mixture of the graphene nanoribbons and the ionic liquid; filtering the mixture, washing and filtering the obtained filter residue, carrying out vacuum drying to constant weight, and thus obtaining the graphene nanoribbons. The graphene nanoribbons are simple in preparation process, the reaction speed and the product quality can be controlled by controlling voltage values, the graphene nanoribbons can effectively be prevented from being agglomerated again after stripping by utilizing the ionic liquid as the electrolyte solution, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of chemical material synthesis, in particular to a graphene nanobelt and a preparation method thereof. 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 (abbreviated as CNW) is a carbon nanostructure with a two-dimensional diffusion structure. Its most typical morphological feature is that it can grow perpendicular to the surface of the substrate material and is a wall-like structure with a thickness greater than that of graphene. The characteristics of lerene, carbon nanotubes, graphene, etc. are completely different, and can be used as raw materials for the preparation of other carbon materials. [0003] Before the discovery of graphene, people began to study the preparation of carbon nanowalls. In 2002, there were lite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00C23C16/48C23C16/26C23C16/02
Inventor 周明杰袁新生王要兵钟辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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