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A kind of porous graphene nanoribbon and its preparation method and application

A porous graphene and nanobelt technology, applied in the field of graphene nanobelts, can solve the problems of difficult cleaning, difficult cleaning, restricting application, etc., and achieve the effects of simplifying the preparation process, high edge activity, and improving specific capacity

Active Publication Date: 2016-03-30
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the graphene oxide nanobelts obtained by this method are very small in size and dispersed in water to form a colloidal solution, which is difficult to clean with conventional centrifugal separation methods, and subsequent cleaning is very difficult, which restricts the further application of this method

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  • A kind of porous graphene nanoribbon and its preparation method and application
  • A kind of porous graphene nanoribbon and its preparation method and application
  • A kind of porous graphene nanoribbon and its preparation method and application

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preparation example Construction

[0024] The embodiment of the present invention discloses a preparation method of a porous graphene nanoribbon, comprising the following steps:

[0025] Mixing multi-walled carbon nanotubes, concentrated sulfuric acid and concentrated nitric acid to obtain a mixed reaction solution, heating the mixed reaction solution for the first time to obtain pre-oxidized carbon nanotubes;

[0026] Cleaning the pre-oxidized carbon nanotubes;

[0027] Mix the cleaned carbon nanotubes with the intercalation agent, dry and heat for the second time, and obtain graphene nanobelts after expansion;

[0028] After the graphene nanobelt is mixed with an activator, an activation treatment is performed to obtain a porous graphene nanobelt.

[0029] According to the present invention, the multi-walled carbon nanotubes are first subjected to pre-oxidation treatment. The invention adopts strong oxidizing concentrated sulfuric acid and concentrated nitric acid to pre-oxidize the multi-walled carbon nano...

Embodiment 1

[0042] Mix concentrated sulfuric acid and concentrated nitric acid uniformly at a volume ratio of 3:1, then add 5g of multi-walled carbon nanotubes to 100ml of the above mixed acid solution, heat at 100°C for 5h; then wash the pre-oxidized carbon nanotubes with deionized water until the filtrate The pH value is neutral, and it is dried for later use; the pre-oxidized carbon nanotubes and hydrogen peroxide are impregnated for 5 hours according to the mass ratio of 1:1, dried in an oven at 80°C, and then expanded at 1000°C for 30s to obtain ribbon-shaped graphene. Graphene nanobelts and potassium hydroxide were uniformly mixed according to a mass ratio of 10:1, and treated in a nitrogen atmosphere at 1000° C. for 24 hours, and the resulting product was cleaned with deionized water to obtain porous graphene nanobelts.

[0043] Such as figure 1 as shown, figure 1 It is a scanning electron microscope image (SEM) of the graphene nanoribbon prepared in Example 1, and the obtained gr...

Embodiment 2

[0045] Mix concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, then add 10g of multi-walled carbon nanotubes to 100ml of the above mixed acid solution, heat at 50°C for 24h; then wash the pre-oxidized carbon nanotubes with deionized water until the filtrate The pH value is neutral, and it is dried for later use; the pre-oxidized carbon nanotubes and oxalic acid are mixed according to the mass ratio of 1:10, then added with deionized water and soaked for 1 hour, dried in an oven at 50°C, and then expanded at 500°C for 30 seconds to obtain Ribbon graphene, mix graphene nanoribbons and potassium hydroxide according to the mass ratio of 1:10, and then treat it in a nitrogen atmosphere at 1000°C for 2 hours, then use deionized water to clean the resulting product, and obtain porous graphene nanobelt.

[0046] The bandwidth of the porous graphene nanobelt prepared in this example is 10-70nm, the pore size distribution is 5-10nm, the tap density is 0.20g...

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Abstract

The invention provides a preparation method and application of a porous grapheme nano band. The preparation method comprises the steps as follows: obtaining a reaction mixture by mixing a multiwalled carbon nanotube, concentrated sulfuric acid and concentrated nitric acid, and heating the reaction mixture for the first time to obtain a pre-oxidized carbon nanotube; cleaning the pre-oxidized carbon nanotube; mixing the cleaned carbon nanotube and an intercalation agent, drying the mixture of the nanotube and the intercalation agent, heating for the second time, and obtaining a graphene nano band after expansion, and finally obtaining the porous graphene nano band by performing activation treatment of the graphene nano band. The invention further provides the porous graphene nano band prepared by the method and a super capacitor prepared by applying the porous graphene nano band. The preparation method of the porous graphene nano band is simple, and the prepared posour graphene nano band has higher specific capacity.

Description

technical field [0001] The invention relates to the technical field of graphene nanobelts, in particular to a porous graphene nanobelt and its preparation method and application. Background technique [0002] Graphene is a two-dimensional crystal composed of a single layer of carbon atoms. It has high chemical stability, high thermal conductivity, higher electron mobility than carbon nanotubes or silicon crystals at room temperature, and lower resistance than copper or silver. Therefore, it has become an important basic material for the preparation of a new generation of nanoelectronic components with lower power and higher speed, and has also become a research hotspot. With the deepening of graphene research, graphene and related materials have been continuously developed and researched, such as: graphene, carbon nanotubes and graphene nanobelts, and graphene nanobelts have become a research hotspot due to their special structure and electrical conductivity. . [0003] Gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04B82Y40/00B82Y30/00H01G11/36C01B32/184C01B32/194
CPCY02E60/13
Inventor 周旭峰刘兆平郑超王国华
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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