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Preparation method of graphene nanobelt

A graphene nanoribbon and carbon nanowall technology is applied in the synthesis field of carbon nanomaterials, and can solve the problems of bad influence on the electrical conductivity of graphene nanoribbons, difficulty in controlling the uniformity of size, and difficulty in meeting actual needs.

Active Publication Date: 2014-06-25
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The relatively stable nature of carbon nanotubes makes the conditions for their oxidation and ring opening relatively harsh, and the oxidation process usually introduces oxygen-containing functional groups, which adversely affects the conductivity of graphene nanoribbons, and the uniformity of size is difficult to control, making the final The quality of graphene nanoribbons is poor, it is difficult to meet the actual needs

Method used

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  • Preparation method of graphene nanobelt
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  • Preparation method of graphene nanobelt

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preparation example Construction

[0026] see figure 1 , the preparation method of the boron-doped graphene nanobelt of an embodiment, comprises the steps:

[0027] Step S110: Etching the metal substrate with a dilute acid solution.

[0028] The metal substrate is preferably one of iron foil, nickel foil and cobalt foil.

[0029] The step of using the dilute acid solution to etch the metal substrate specifically includes: putting the metal substrate into the dilute acid solution with a concentration of 0.01 mol / L-1 mol / L and etching for 0.5-10 minutes.

[0030] Dilute acid solution is dilute hydrochloric acid solution, dilute sulfuric acid solution or dilute nitric acid solution.

[0031] Preferably, the concentration of the dilute acid solution is 0.1 mol / L-0.5 mol / L, and the etching time is 1 minute-3 minutes.

[0032] Etching the metal substrate to cause defects on the surface of the metal substrate can effectively improve the surface structure of the metal substrate to provide a favorable growth base for...

Embodiment 1

[0069] 1. Put the nickel foil in a dilute hydrochloric acid solution with a concentration of 1mol / L and etch it for 0.5 minutes. After etching, clean it with deionized water, ethanol, and acetone and dry it;

[0070] 2. Exclude the air in the reaction chamber and ventilate nitrogen gas, put the cleaned and dried nickel foil into the reaction chamber ventilated with nitrogen gas, heat the nickel foil to 900°C and keep it warm, then turn on the ultraviolet light source equipment to make the ultraviolet Light is irradiated on the surface of nickel foil, the wavelength of ultraviolet light is 250nm, and then 200 sccm of methane is passed through, the volume ratio of methane to nitrogen is 2:1, and it is kept for 100 minutes;

[0071] 3. After the reaction is completed, stop feeding methane, stop heating the nickel foil and turn off the ultraviolet light source equipment. After the reaction chamber cools down to room temperature, stop feeding nitrogen. The surface of the nickel foil...

Embodiment 2

[0077] 1. Use iron foil as the substrate, put the iron foil in a dilute sulfuric acid solution with a concentration of 0.5mol / L and etch it for 4 minutes. After etching, clean it with deionized water, ethanol, and acetone and dry it;

[0078] 2. Exclude the air in the reaction chamber and pass in argon gas, put the cleaned and dried iron foil into the reaction chamber with argon gas, heat the iron foil to 600°C and keep it warm, then turn on the ultraviolet light source equipment, Let ultraviolet light irradiate on the surface of the iron foil, the wavelength of ultraviolet light is 200nm, then pass through ethane 100sccm, the volume ratio of ethane and argon is 5:1, keep for 200 minutes;

[0079] 3. After the reaction is completed, stop feeding ethane, stop heating the iron foil and turn off the ultraviolet light source equipment. After the reaction chamber cools down to room temperature, stop feeding argon gas. The surface of the iron foil will form a carbon nano-wall, and re...

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Abstract

The invention provides a preparation method of a graphene nanobelt. The method comprises the following steps: carrying out photocatalytic chemical vapor deposition to prepare carbon nanowall powder with a complete structure and a good dimensional homogeneity, placing the carbon nanowall powder on a current collector, compacting to form a carbon nanowall sheet in order to obtain a work electrode, and carrying out electrochemical peeling to obtain the graphene nanobelt with a good dimensional homogeneity. An ionic liquid electrolyte is inserted between carbon nanowall layers under the action of a forward voltage, and then a backward voltage is applied to realize the shedding of the ionic liquid electrolyte from the carbon nanowall in order to obtain the graphene nanobelt. The method makes no oxygen-containing groups introduced into the finally obtained graphene nanobelt, and the graphene nanobelt with a good quality can be prepared through the method.

Description

technical field [0001] The invention relates to the field of synthesis of nano-carbon materials, in particular to a preparation method of graphene nanobelts. Background technique [0002] Graphene nanoribbons are ribbon structures formed on the basis of two-dimensional graphene planes after certain shearing. Graphene nanoribbons not only have the performance of graphene, but also have some special properties, such as its long-diameter ratio, which can be as high as thousands of times. Modifications are carried out to prepare switching devices, such as boron doping to prepare graphene nanobelts, etc. [0003] At present, the method for preparing graphene nanoribbons usually uses a strong oxidant to cut carbon nanotubes to prepare graphene nanoribbons. Due to the relatively stable properties of carbon nanotubes, when cutting carbon nanotubes, it is usually necessary to soak carbon nanotubes in strong acid for a long time, and then add a strong oxidant to perform a long-term ...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y40/00C01B32/19
Inventor 周明杰袁新生王要兵钟辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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