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Method for preparing graphene nanoribbon with width being 100-1000 nm

A graphene nanoribbon and width technology, applied in the field of graphene, can solve the problems of high production cost, and achieve the effect of low production cost, low price and large width

Active Publication Date: 2016-05-18
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the current preparation of graphene nanobelts is limited by the size of raw material carbon tubes and the high cost of vapor deposition of wide graphene nanobelts, the present invention proposes a method for preparing graphene nanobelts with a width of 100-1000nm. Using nano-carbon fiber as raw material, the preparation method is simple to operate, the amount of raw material is large and cheap (1 / 3 of the price of carbon tubes), and it can realize the experimental dosage production of wide graphene nanoribbons with a width greater than 100nm to industrialized mass production

Method used

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  • Method for preparing graphene nanoribbon with width being 100-1000 nm
  • Method for preparing graphene nanoribbon with width being 100-1000 nm
  • Method for preparing graphene nanoribbon with width being 100-1000 nm

Examples

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Embodiment 1

[0026] (1) Oxidative etching and stripping carbon nanofibers: Take 5.0g linear carbon nanofibers with a diameter of 150nm, add them to 1000ml of industrial concentrated sulfuric acid, stir mechanically for 2 hours, add 25g potassium permanganate, stir to dissolve, heat to 70°C with mechanical stirring 2h, sonicated for 30min after stirring at high temperature for 1 hour, and the ultrasonic frequency was 5kHz to obtain a dark green mixture;

[0027] (2) Purification of graphene oxide nanobelts: transfer the above mixture into ice water, add 25 ml of 30% hydrogen peroxide, and centrifuge for 3-5 times to remove unreacted oxidants. Add hydrochloric acid to soak for 1 night to remove metal ions. The obtained graphene oxide nanoribbon paste-like liquid-packed dialysis bag is dialyzed to a pH of 8; the neutralized graphene oxide nanoribbon is freeze-dried to obtain a powdery graphene oxide nanoribbon with a width of about 800 nm;

[0028] The TEM photo of the graphene oxide nanobel...

Embodiment 2

[0032] (1) Oxidative etching and stripping carbon nanofibers: Take 1.0g linear carbon nanofibers with a diameter of about 200nm, add them to mixed acid (150ml industrial concentrated sulfuric acid, 100ml industrial concentrated nitric acid), stir at room temperature for 1 hour, add 6g potassium perchlorate, and stir After dissolving, heat to 70°C with mechanical stirring for 0.8h, at the same time ultrasonic for 25min, ultrasonic frequency 10kHz, to obtain the ink-colored mixture;

[0033] (2) Purification of graphene oxide nanobelts: transfer the above mixture into ice water, add 5 ml of 30% hydrogen peroxide, and centrifuge for 3-5 times to remove unreacted oxidants. Add hydrochloric acid to soak for 1 night to remove metal ions, and the obtained graphene oxide nanobelt is dialyzed to a pH value of 6 in a dialysis bag with a paste-like liquid;

[0034] (3) Dilute the neutralized graphene oxide nanoribbons with deionized water, add hydrazine hydrate, heat to 90 °C, reduce for...

Embodiment 3

[0036] (1) Oxidative etching and stripping of carbon nanofibers: Take 1.0g linear carbon nanofibers with a diameter of about 50nm, add them to 150ml of industrial concentrated sulfuric acid, stir at high speed for 2h, add 4g potassium permanganate, add 4g potassium permanganate, stir to dissolve Then, heated to 80°C and mechanically stirred for 1 h, and while stirring, ultrasonicated for 30 min, and the ultrasonic frequency was 20 kHz to obtain the ink-colored mixture;

[0037] (2) Purification of graphene oxide nanobelts: transfer the above mixture into ice water, add 6 ml of 30% hydrogen peroxide, and centrifuge for 3-5 times to remove unreacted oxidants. Add hydrochloric acid to soak for 1 night to remove metal ions. The paste-like liquid-packed dialysis bag of the obtained graphene oxide nanoribbons is dialyzed to a pH of 7;

[0038] The TEM photo of the graphene oxide nanobelt prepared in Example 3 is as follows figure 2 shown.

[0039] (3) Add deionized water to the ...

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Abstract

The invention belongs to the technical field of graphene and provides a method for preparing a graphene nanoribbon with the width being 100-1000 nm in order to solve the problems that preparation of graphene nanoribbon at present is limited by the sizes of raw material carbon tubes and a wide graphene nanoribbon vapour deposition method is high in preparation cost. According to the method, linear nano carbon fibers serve as raw materials, the nano carbon fibers are first stripped through oxidation etching, then the oxidized graphene nanoribbon is purified, and finally the graphene nanoribbon is obtained through reduction. The preparation method is easy to operate, the number of the raw materials is large, the raw materials are low in price which is 1 / 3 that of the carbon tubes, and experimental dose production and industrial large-scale production of the graphene nanoribbon with the width larger than 100 nm can be achieved.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a method for preparing a graphene nanobelt, in particular to a method for preparing a graphene nanobelt with a width of 100-1000 nm. Background technique [0002] Graphene is a sp 2 A new material with a two-dimensional sheet structure composed of hybrid single-layer carbon atoms is currently the most studied emerging material due to its excellent electrical, mechanical, thermal and other properties. However, the two-dimensional large planar structure of graphene is prone to structural defects such as wrinkles and undulations, which affects its potential applications in many fields. In recent years, with the deepening of research and application requirements, organic and inorganic doping modification of graphene, derivatives of graphene in different forms (such as graphene nanoribbons (GNR), graphene quantum dots, graphene nanosheets, etc. ) and other related work ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y40/00B82Y30/00
CPCC01B2204/065C01P2002/72C01P2004/04
Inventor 赵丽胡丽丽汤龙程吴连斌官礼知强飞蒋剑雄
Owner HANGZHOU NORMAL UNIVERSITY