Graphene band prepared with acid oxidized flat carbon nano-tube and method for preparing graphene band

A carbon nanotube and graphene technology, applied in the field of graphene strips and their preparation, can solve problems such as difficult directional cutting, lack of special defect sites, etc., and achieve the effects of simple method, easy realization and control, and narrow width.

Inactive Publication Date: 2012-07-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is difficult to form regular graphene strips by the physical and chemical tailoring graphene approach used, and it is also difficult to obtain regular graphene strips by acid oxidation or plasma cutting me

Method used

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  • Graphene band prepared with acid oxidized flat carbon nano-tube and method for preparing graphene band
  • Graphene band prepared with acid oxidized flat carbon nano-tube and method for preparing graphene band
  • Graphene band prepared with acid oxidized flat carbon nano-tube and method for preparing graphene band

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1: Carbon nanotube fibers are prepared according to the method reported in Patent CN101665997A, and the flat carbon nanotube fibers are formed by connecting and arranging flat carbon nanotubes. The flat carbon nanotubes prepared by the above-mentioned patented method are used as raw materials, and the microstructure is a bundle of laminated flat carbon nanotubes. figure 1 . Using concentrated sulfuric acid as the pre-oxidant and potassium permanganate as the oxidant, the flat carbon nanotubes are cut by acid oxidation to prepare graphene strips. The oxidation conditions were as follows: the mass ratio of concentrated sulfuric acid to flat carbon nanotubes was 6, and the mass ratio of potassium permanganate to flat carbon nanotubes was 4. Add flat carbon nanotubes to concentrated sulfuric acid (98%), 60℃ water bath, 200rpm magnetic stirring for 30 minutes; add potassium permanganate, 60℃ keep and stir for 90 minutes for oxidation; add deionized water and continue ...

Example Embodiment

[0030] Example 2: The experimental process is the same as that of Example 1, changing the mass ratio of concentrated sulfuric acid and the oxidant potassium permanganate to carbon tubes. The mass ratio of concentrated sulfuric acid to flat carbon nanotubes is 3. The ratio of potassium permanganate to flat carbon nanotubes is 3. The mass ratio is 2, and graphene strips are prepared.

Example Embodiment

[0031] Example 3: The experimental process is the same as that of Example 1, changing the mass ratio of concentrated sulfuric acid and the oxidant potassium permanganate to carbon tubes. The mass ratio of concentrated sulfuric acid and flat carbon nanotubes is 7.5. The difference between potassium permanganate and flat carbon nanotubes The mass ratio is 5, and graphene strips are prepared, as attached Image 6 .

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PUM

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Abstract

The invention relates to a graphene band prepared with an acid oxidized flat carbon nano-tube and a method for preparing the graphene band. The method includes the specific and main steps: preliminarily oxidizing a carbon nano-tube with acid; oxidizing the carbon nano-tube with strong oxidizers; adding water for hydrolysis; adding hydrogen peroxide for purification; and preparing the graphene band after washing and drying. The acid oxidized flat carbon nano-tube is precisely, directionally and longitudinally cut along the edge of the acid oxidized flat carbon nano-tube, so that the regular and uniform high-quality graphene band is prepared. The method is simple and convenient, is easy to implement and control, and can be used for directional cutting in a wide temperature range and under various oxidization conditions, and preparing the graphene band on a large scale. The prepared graphene band is uniform, regular and narrow, has uniform layers and neat edges, and can be applied to composite materials, conductive and heat conducting materials, sensors, electronic circuits, micro-nano devices and related fields.

Description

technical field [0001] The invention relates to a graphene strip prepared by acid oxidation of flat carbon nanotubes and a preparation method thereof, in particular to the preparation of graphene strip material and its preparation method by directional cutting of flat carbon nanotubes by acid oxidation, which belongs to nanomaterial preparation technology field. Background technique [0002] Graphene ribbons are nanometer-wide graphene materials, typically containing 1 to 10 layers of graphite. Graphene ribbons have a unique two-dimensional layered nanostructure, high strength, high electrical conductivity, high thermal conductivity, and at the same time have semiconductor properties sensitive to one-dimensional nanoribbon structures, for example, narrow graphene ribbons (less than 10nm) Exhibiting semiconducting properties, the broad strips can be transformed into conductors. These excellent structural, mechanical, physical and semiconductor properties of graphene strips ...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y40/00C01B32/168C01B32/184
Inventor 李亚利康艳茹邓岷阳
Owner TIANJIN UNIV
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