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Preparation method of nitrogen-doped graphene and nitrogen-doped graphene

A nitrogen-doped graphene and graphene technology, applied in the field of nitrogen-doped graphene and nitrogen-doped graphene preparation, can solve the problems of high hydrogen pressure, large discharge current, and high risk, and achieve low production cost, Simple equipment, high purity effect

Inactive Publication Date: 2014-10-29
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using this method to prepare graphene requires high hydrogen pressure and large discharge current, which is highly dangerous

Method used

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  • Preparation method of nitrogen-doped graphene and nitrogen-doped graphene
  • Preparation method of nitrogen-doped graphene and nitrogen-doped graphene
  • Preparation method of nitrogen-doped graphene and nitrogen-doped graphene

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Experimental program
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Effect test

Embodiment 1

[0033]Graphene is prepared in an electric arc furnace, and the furnace wall of the electric arc furnace is cooled with circulating water. Spectrally pure graphite rods were used as the two poles of the electric arc furnace, and the diameters of the graphite rods at both poles were 8mm. Under the condition that the reaction atmosphere is a mixture of nitrogen and hydrogen, the volume ratio of the mixture is 1:2, the pressure is 570 Torr, and the current is 150A, AC arc discharge is carried out. After the two poles were consumed, the product was collected and burned in air at 450°C for 1 hour to obtain nitrogen atom-doped graphene. The low magnification transmission electron micrograph of the graphene is as follows image 3 As shown, the scale bar is 100nm, and the size of the graphene sheet is between 100-200nm; Figure 5 It is a high-resolution transmission electron microscope photo of the graphene, a and e are the edges of double-layer and six-layer graphene respectively, a...

Embodiment 2

[0035] Graphene is prepared in an electric arc furnace, and the furnace wall of the electric arc furnace is cooled with circulating water. Spectrally pure graphite rods are used as the two poles of the electric arc furnace, and the diameters of the graphite rods at the two poles are both 8 mm. Under the condition that the reaction atmosphere is a mixture of nitrogen and hydrogen, the volume ratio of the mixture is 1:2, the pressure is 570 Torr, and the current is 175A, AC arc discharge is carried out. After the two poles were consumed, the product was collected and burned in air at 450°C for 1 hour to obtain nitrogen atom-doped graphene.

Embodiment 3

[0037] Graphene is prepared in an electric arc furnace, and the furnace wall of the electric arc furnace is cooled with circulating water. Spectrally pure graphite rods are used as the two poles of the electric arc furnace, and the diameters of the graphite rods at the two poles are both 8 mm. Under the conditions of nitrogen and hydrogen gas mixture (volume ratio 1:2) at a pressure of 570 Torr and a current of 200 A, AC arc discharge was carried out. After the two electrodes were consumed, the product was collected and burned in air at 500°C for 1 hour to obtain nitrogen atom-doped graphene.

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Abstract

The invention discloses a preparation method of nitrogen-doped graphene and the nitrogen-doped graphene. The method is as follows: graphite rods are used as two poles of an arc furnace for AC or DC arc discharge in the reaction atmosphere containing nitrogen element in the arc furnace, and in the arc discharge process, the nitrogen-doped graphene is obtained on the inner wall of the arc furnace by continuous consumption of the graphite rod. The obtained nitrogen-doped graphene is burnt in air, to remove a small amount of amorphous carbon in the nitrogen-doped graphene product. The technical proposal provided by the invention is simple in equipment, low in production cost and faster in preparation speed, and can reach the requirements of mass production; by sue of the nitrogen containing atmosphere especially the use of ammonia, the prepared graphene is nitrogen doped graphene, and compared with pure carbon graphene, the nitrogen atom doped graphene has new properties.

Description

technical field [0001] The invention relates to synthesis technology of graphene, in particular to a preparation method of nitrogen-doped graphene and nitrogen-doped graphene. Background technique [0002] Graphene is a new allotrope of carbon discovered in recent years. It is a two-dimensional structure composed of carbon atoms arranged in a hexagonal grid. Monolayer graphene consisting of only one layer of carbon atoms has excellent electrical and mechanical properties (Electric field effect in atomically thin carbon films, Science, 2004, 306, 666-669; Measurement of the elastic properties and intrinsic strength of monolayer graphene , Science, 2008, 321, 385-388), has broad application prospects in the fields of nanoelectronic devices, photoelectric conversion and battery materials. In addition to single-layer graphene, bilayer and multilayer graphene also have unique physical and chemical properties (Graphene, the new nanocarbon, Journal of Materials Chemistry, 2009, 19...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 施祖进刘阳杨昊
Owner PEKING UNIV