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Method for preparing grapheme nano belts by etching carbon nano tubes through water vapor

A technology of graphene nanobelts and carbon nanotubes, which is applied in the direction of graphene, nanocarbon, nanotechnology, etc., can solve the problems of many graphene wrinkles, serious pollution, cumbersome process, etc., and achieve good quality and high yield of nanobelts , the effect of the simple method

Inactive Publication Date: 2012-08-01
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a method for preparing graphene nanobelts by etching carbon nanotubes with water vapor. The graphene nanobelts prepared by the present invention have the advantages of less wrinkles, less agglomeration, controllable layer number, and high yield. The preparation process is simple and easy to operate, can be completed in one step, no need to use surfactants for dispersion, the process is pollution-free, green and environmentally friendly, and solves the disadvantages of cumbersome process, serious pollution, low yield, and many graphene wrinkles in the general preparation method

Method used

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  • Method for preparing grapheme nano belts by etching carbon nano tubes through water vapor
  • Method for preparing grapheme nano belts by etching carbon nano tubes through water vapor
  • Method for preparing grapheme nano belts by etching carbon nano tubes through water vapor

Examples

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Effect test

Embodiment 1

[0022] Put 0.01g of multi-walled carbon nanotubes with a diameter of 8-15nm into the bottom of a polytetrafluoroethylene inner substrate with a volume of 20mL, add 100μL of distilled water into it, oscillate to spread the nanotubes evenly, and then seal the inner liner into the Stainless steel reactor. Put the reaction kettle into a blast drying oven, set the temperature to 200°C, and react at a constant temperature for 5 hours. After the reaction, the sample is taken out, dried under an infrared lamp, and the graphene nanobelt can be obtained after the water evaporates completely.

[0023] The samples were analyzed by scanning electron microscopy, and the results were as follows: figure 1 as shown in a. from figure 1 a It can be seen that a small part of the multi-walled carbon nanotubes is cracked to form graphene nanoribbons. The dark part is the graphene nanoribbon formed by the carbon nanotubes being etched by water vapor, and the bright part is the original carbon nan...

Embodiment 2

[0025] Put 0.02g of multi-walled carbon nanotubes with a diameter of 8-15nm into the bottom of a polytetrafluoroethylene inner substrate with a volume of 20mL, add 200μL of distilled water into it, oscillate to spread the nanotubes evenly, and then seal the inner liner into the Stainless steel reactor. Put the reaction kettle into a blast drying oven, set the temperature to 225° C., and react at a constant temperature for 10 hours. After the reaction, the sample is taken out, dried under an infrared lamp, and the graphene nanobelt can be obtained after the water evaporates completely.

[0026] The samples were analyzed by scanning electron microscopy, and the results were as follows: figure 2 as shown in a. from figure 2 a It can be seen that the multi-walled carbon nanotubes are partially cracked to form graphene nanoribbons. The dark part is the graphene nanoribbon formed by the carbon nanotubes being etched by water vapor, and the bright part is the original carbon nan...

Embodiment 3

[0028] Put 0.005g of multi-walled carbon nanotubes with a diameter of 8-15nm into the bottom of a polytetrafluoroethylene inner substrate with a volume of 20mL, add 200μL of distilled water into it, oscillate to spread the nanotubes evenly, and then seal the inner liner into the Stainless steel reactor. Put the reaction kettle into a blast drying oven, set the temperature to 150° C., and react at a constant temperature for 10 hours. After the reaction, the sample is taken out, dried under an infrared lamp, and the graphene nanobelt can be obtained after the water evaporates completely.

[0029] The samples were analyzed by scanning electron microscopy, and the results were as follows: image 3 as shown in a. from image 3 a It can be seen that the multi-walled carbon nanotubes are partially cracked to form graphene nanoribbons. The dark part is the graphene nanoribbon formed by the carbon nanotubes being etched by water vapor, and the bright part is the original carbon nano...

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Abstract

The invention discloses a method for preparing grapheme nano belts by etching carbon nano tubes through water vapor. The method comprises the steps of putting multi-wall carbon nano tubes into a polyfluortetraethylene inner liner, adding a certain amount of distilled water into the inner liner, vibrating to ensure that the nano tubes are uniformly dispersed, then putting the polyfluortetraethylene inner liner into a reaction kettle, heating to 150 to 225 DEG C, keeping constant temperature for 5 to 20 h, so as to ensure that the multi-wall carbon nano tubes are longitudinally cracked to form high-quality grapheme nano belts. The grapheme nano belts prepared through the method have the advantages of less folds, uneasiness in aggregation, controllable number of layers, high yield and the like, at the same time, the preparation process is simple and easy to operate and can be accomplished at one step, a surface active agent is not required to be adopted for dispersing, and the process ispollution-free and environmental-friendly. The method overcomes the disadvantages of complex process, severe pollution, low yield and the like during the grapheme preparation through other methods.

Description

technical field [0001] The invention belongs to the field of graphene preparation, and in particular relates to a method for preparing graphene nanoribbons by etching carbon nanotubes with water vapor, which is a simple, green and environment-friendly preparation method. Background technique [0002] Graphene nanoribbons are a new type of material with unique electronic properties. In recent years, graphene has attracted widespread attention, and its peculiar physical and chemical properties have aroused people's great interest. As a kind of graphene material, graphene nanoribbons have great applications in field effect transistors because of their smooth edges, small width, and wide energy band gap. There are many methods for preparing graphene nanoribbons reported in recent years, such as redox method, ultrasonic method, cracking carbon tube method, etc. Among them, the cracking carbon tube method stands out among many methods because it can control the width and number ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y40/00C01B32/184
Inventor 胡晓琳刘春辰陈建中庄乃锋赵斌郭飞云
Owner FUZHOU UNIV
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