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Preparation method of nitrogen-doped wrinkled graphene

A technology of graphene and nitrogen doping, applied in the field of nitrogen-doped wrinkled graphene and its preparation, can solve the problems of reducing specific surface area, limitation, etc., and achieve good doping effect

Inactive Publication Date: 2017-01-11
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, an obstacle to the industrial application of graphene materials is that there is van der Waals force between graphene sheets, which makes it easy to stack between layers, which greatly reduces its specific surface area and limits its performance and application

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Take 100ml of 1g / l graphene oxide solution and 500mg of urea, mix them evenly, atomize them, and dry them at 100°C for about 15 seconds. The alkenes were heat-treated at 800°C for 1.5 hours under an inert gas atmosphere. Finally, paper ball-shaped wrinkled graphene with a particle diameter ranging from 300 to 500 nanometers was obtained, and the nitrogen content was 5.12%. The shape of wrinkled graphene is as figure 1 shown.

Embodiment 2

[0044] Take 100ml of 0.5g / l graphene oxide solution and 2500mg of urea, mix them evenly, atomize them, and dry them at 200°C for about 10 seconds. Graphene was heat-treated at 200°C for 5 hours under an inert gas protection atmosphere. Finally, hemispherical wrinkled graphene was obtained with a nitrogen content of 15.28%. The shape of wrinkled graphene is as figure 2 shown.

Embodiment 3

[0046] Take 100ml of 0.1g / l graphene oxide solution, 5000mg of urea, mix well, atomize, and dry at 500°C for about 5 seconds. Graphene was heat-treated at 500°C for 1 hour under an inert gas protection atmosphere. Finally, an approximate planar wrinkled graphene is obtained with a nitrogen content of 20.3%. The shape of wrinkled graphene is as image 3 shown.

[0047] The invention realizes effective nitrogen doping of graphene and also obtains wrinkle with controllable degree, the method is simple and the cost is low.

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Abstract

The invention relates to a preparation method for corrugated nitrogen-doped graphene. The preparation method comprises the following steps: uniformly mixing a graphene oxide solution with a water-soluble nitrogen-containing compound to obtain a mixed solution; atomizing the mixed solution and heating the mixed solution to volatilize a solvent in the mixed solution so as to obtain corrugated nitrogen-doped graphene oxide powder particles; collecting the graphene oxide powder particles and performing heat treatment under the protection of inert gas to obtain the corrugated nitrogen-doped graphene, wherein the heat treatment temperature is 150-1,100 DEG C, and the nitrogen content of the obtained corrugated nitrogen-doped graphene is 1%-30%. Controllable corrugation is further obtained while graphene is effectively doped with nitrogen; the method is simple and low in cost.

Description

technical field [0001] The invention relates to nitrogen-doped wrinkled graphene and a preparation method thereof. Background technique [0002] Graphene with a two-dimensional structure has attracted extensive attention due to its excellent properties. Theoretically, two-dimensional graphene has a very high specific surface area, high electrical conductivity, high carrier mobility, etc., making it attract much attention in the application of two-dimensional materials. At present, an obstacle to the industrial application of graphene materials is that there is van der Waals force between graphene sheets, which makes it easy to stack between layers, which greatly reduces its specific surface area and limits its performance and application. A feasible method is to transform the two-dimensional nanosheet structure into a three-dimensional wrinkled cluster structure. Unlike flat sheets, graphene with a highly wrinkled cluster structure has a high free volume and excellent com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 李晓东唐志红杨俊和
Owner UNIV OF SHANGHAI FOR SCI & TECH
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