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Method for preparing nitrogen-doped graphene from furazan derivatives as nitrogen source

A nitrogen-doped graphene and derivative technology, applied in graphene, chemical instruments and methods, carbon compounds, etc., can solve the problems of limited application scope and the difficulty of compounding graphene materials, and achieve the effect of expanding the application scope

Active Publication Date: 2018-06-01
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The invention provides a method for preparing nitrogen-doped graphene with furoxan derivatives as a nitrogen source, aiming to solve the problem that graphene materials are not easy to be combined with other materials, resulting in limited application range

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  • Method for preparing nitrogen-doped graphene from furazan derivatives as nitrogen source
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  • Method for preparing nitrogen-doped graphene from furazan derivatives as nitrogen source

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preparation example Construction

[0019] Please refer to figure 1 , figure 1 The embodiment of the present invention provides a flow chart of a method for preparing nitrogen-doped graphene with furoxan derivatives as a nitrogen source, the method comprising:

[0020] Step 101: disperse graphene in water to obtain graphene aqueous solution. Wherein, the number of layers of the graphene is 1-3 layers.

[0021] Step 102: adding furoxan derivatives to the graphene aqueous solution, heating and stirring at 50-70°C for 30-60min, cooling to 20-40°C, and drying at constant temperature to obtain graphene-coated furoxan derivatives eutectic.

[0022] Wherein, the mass ratio of graphene and furoxan derivatives is 1:6~10; At least one of 4-nitrofurazan (ANF) and the like. The nitrogen content of the furoxan derivatives is 43-58 wt%, for example, DAF is a nitrogen heterocyclic compound with a nitrogen content of 56%.

[0023] Step 103: Grinding the graphene-coated furazan derivative eutectic into powder, heating to 5...

Embodiment 1

[0029] Such as figure 2 As shown, 0.1g of graphene with a sheet diameter of 0.2μm was added to 25ml of deionized water, stirred magnetically at 600r / min for 60 minutes, then placed in an ultrasonic disperser, and ultrasonically shaken for 60 minutes to obtain 4mg / ml of graphite Alkene solution.

[0030] Add 0.8g DAF to the above 25ml graphene solution, heat at 50°C for 30min until DAF is completely dissolved, cool down to 25°C, and dry the mixed solution in a constant temperature drying oven for 48h to obtain a graphene-coated DAF eutectic .

[0031] The DAF eutectic was ground into powder, placed in a tube furnace and heated to 600°C for 4 hours to obtain nitrogen-doped graphene with a nitrogen content of 5.16%.

[0032] Such as image 3 Shown is a scanning electron microscope schematic diagram of nitrogen-doped graphene prepared with DAF as a nitrogen source. Depend on image 3 It can be seen that in the nitrogen-doped graphene obtained in the experiment, the graphene ...

Embodiment 2

[0037] Such as figure 2 As shown, 0.1g of graphene with a sheet diameter of 0.5μm was added to 25ml of deionized water, stirred magnetically at 600r / min for 70 minutes, then placed in an ultrasonic disperser, and ultrasonically shaken for 40 minutes to obtain 4mg / ml of graphite Alkene solution.

[0038] Add 1.0g DAAzF to the above 30ml graphene solution, heat at 50°C for 30min until DAAzF is completely dissolved, cool down to 25°C, and dry the mixed solution in a constant temperature drying oven for 48h to obtain a graphene-coated DAAzF eutectic .

[0039] The DAAzF eutectic was ground into powder, placed in a tube furnace and heated to 700°C for 5 hours to obtain nitrogen-doped graphene with a nitrogen content of 6.12%.

[0040] After several experiments, it is feasible to use DAAzF as a nitrogen source to prepare nitrogen-doped graphene.

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Abstract

The invention belongs to the technical field of material preparation, and particularly relates to a method for preparing nitrogen-doped graphene from furazan derivatives as a nitrogen source. The method comprises the following steps: dispersing graphene in water to obtain a graphene aqueous solution; adding the furazan derivatives to the graphene aqueous solution, performing heating and stirring at 50-70 DEG C for 30-60 min, performing cooling to 20-40 DEG C, and performing drying at constant temperature to obtain graphene-coated furazan derivative eutectic crystals; grinding the graphene-coated furazan derivative eutectic crystals into powder, and the powder is heated to 500-800 DEG C and kept at the constant temperature for 3-5 h to obtain nitrogen-doped graphene. Graphene in nitrogen-doped graphene uniformly coats the surface of the furazan derivative crystals without using additives such as adhesives and the like, and accordingly, surface performance of the furazan derivative crystals is completely maintained.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing nitrogen-doped graphene with furoxan derivatives as a nitrogen source. Background technique [0002] Graphene (G) is a two-dimensional honeycomb lattice material formed by the close bonding of planar single-layer carbon atoms, with a thickness of about 0.35nm, which is the thinnest two-dimensional material in the world. [0003] Graphene has many unique properties, such as: tensile strength up to 130GPa; carrier mobility up to 15000-25000cm 2 / Vs (square centimeter per volt second), which can exceed 10 times that of silicon wafers; thermal conductivity can reach 5000W / mK (watt per millithermal conductivity), which is 3 times that of diamond; it also has room temperature quantum Hall effect and room temperature Ferromagnetism etc. Due to these unique properties, the electrons of graphene pass through without any resistance, generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/194
CPCC01B2204/20
Inventor 卓海涛陈少军朱佳平
Owner SHENZHEN UNIV
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