Preparation method of fluorinated graphene nanobelt

A fluorinated graphene and nanoribbon technology, applied in the field of graphene, can solve the problems of difficult industrialization promotion, complex process, high energy consumption, and achieve the effects of good application prospect, simple operation and high output

Active Publication Date: 2018-08-10
TIANJIN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This method has high energy consumption, complex process and low yield, making it difficult to promote industrially.

Method used

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

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[0023] The invention provides a kind of preparation method of fluorinated graphene nanobelt, comprises the following steps:

[0024] The anhydrous carbon nanotubes are fluorinated in a fluorine gas atmosphere under the conditions of -0.07-0 MPa and 280-450° C. to obtain fluorinated graphene nanobelts.

[0025] The present invention can use single-wall carbon nanotubes, double-wall carbon nanotubes or multi-wall carbon nanotubes as carbon nanotube raw materials.

[0026] In order to ensure the smooth progress of the fluorination process, the carbon nanotubes must be anhydrous. The water removal mode of the anhydrous carbon nanotubes is preferably:

[0027] Put the carbon nanotubes and desiccant into a vacuum drying oven, and dry them under vacuum at 80-120°C.

[0028] The drying time is preferably 4-8 hours.

[0029] The desiccant is preferably one or more of anhydrous phosphorus pentoxide, molecular sieve and activated carbon.

[0030] Preferably in the present invention, ...

Embodiment 1

[0043] (1) Put 10 mg of single-walled carbon nanotubes into a tube furnace and pass H 2 , purified at 500°C for 5h;

[0044] (2) Put the purified 10 mg single-walled carbon nanotubes into a vacuum drying oven at 100°C, and put anhydrous phosphorus pentoxide in the bottom of the vacuum drying oven, take it out and seal it after 4 hours, and set aside;

[0045] (3) Put 10 mg of dry single-walled carbon nanotubes obtained in (2) into the reactor to evacuate to a vacuum. After the reactor is heated up to a reaction temperature of 300° C., keep it warm for 240 minutes, and then evacuate to a vacuum and feed 20% fluorine gas Mixed gas with nitrogen to -0.07Mpa, react for 4h;

[0046] (4) The product obtained in (3) was placed in a vacuum oven and dried for 10 h to obtain 8.3 mg of fluorinated graphene nanoribbons with a fluorocarbon ratio of 0.97.

[0047] The microstructure of the prepared fluorinated graphene nanoribbons was characterized by transmission electron microscopy, fi...

Embodiment 2

[0052] (1) Put 50 mg of single-walled carbon nanotubes into a tube furnace and pass H 2 , and purify at 500° C. for 5 hours.

[0053] (2) Put 50 mg of purified single-walled carbon nanotubes into a vacuum drying oven at 90°C, and put anhydrous phosphorus pentoxide in the bottom of the vacuum drying oven, take it out and seal it after 6 hours, and set aside;

[0054] (3) Put 50 mg of dry single-walled carbon nanotubes obtained in (2) into the reactor to evacuate to a vacuum. After the reactor is heated up to a reaction temperature of 320° C., keep it warm for 240 minutes, and then evacuate to a vacuum and feed 20% fluorine gas Mixed gas with nitrogen to 0Mpa, react for 4h;

[0055](4) The product obtained in (3) was placed in a vacuum oven and dried for 10 h to obtain 42.6 mg of fluorinated graphene nanobelts with a fluorocarbon ratio of 1.08.

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Abstract

The invention provides a method for preparing a fluorinated graphene nanobelt by taking fluorine gas as a fluorine source. The method comprises the step: fluorinating an anhydrous carbon nanotube under the conditions of -0.07 to 0 MPa and 280 to 450 DEG C and under the atmosphere of fluorine gas to obtain the fluorinated graphene nanobelt. The method provided by the invention is simple to operate,wide in raw material source, low in cost and high in yield; the yield can reach dozens of milligrams, even hundreds of milligrams; and furthermore, aftertreatment is simple, and the fluorinated graphene nanobelt can be prepared through one-step reaction. The prepared fluorinated graphene nanobelt has high super-hydrophobicity and chemical stability, can be applied in the fields of protective iceand the like and has a very good application prospect.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a preparation method of fluorinated graphene nanobelts. Background technique [0002] Fluorinated graphene nanoribbons are an important derivative of graphene, a carbon material with a planar lattice, a semimetal that has been shown to have a charge that rivals or surpasses all electronics The known material used in , is also a zero-gap semiconductor material. Graphene nanoribbon is a kind of graphene with a large aspect ratio, and its application in electricity is sometimes limited. In order to open the energy band, electrons can generally be confined to the nanoribbon or to the graphene nanoribbon. Some modifications to the double-layer structure of graphene, chemical modification of graphene is one of the methods to extend the energy band. When oxygen atoms, hydrogen atoms, or fluorine atoms are covalently bonded to the carbon atoms in the graphene nanoribbons, a wide bandg...

Claims

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Application Information

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IPC IPC(8): C01B32/184
CPCC01B32/168C01B32/174C01B32/184B82Y40/00C01B32/17B82Y30/00C01B2204/06
Inventor 封伟彭聪冯奕钰
Owner TIANJIN UNIV
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