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Method for preparing porous graphene material

A technology of porous graphene and graphitization catalyst, which is applied in the direction of nanotechnology to achieve the effects of easy-to-obtain raw materials, simple preparation methods, and high degree of graphitization

Inactive Publication Date: 2011-06-29
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Porous graphene is to manufacture some nanometer-sized holes in the graphene sheet by physical or chemical methods. This structure makes graphene not only have a high specific surface area when it is used as an energy source, catalyst or adsorption material, At the same time, it also has a good mass transfer effect, giving full play to the advantages of this two-dimensional nanosheet material. At present, there are few reports on the preparation of porous graphene.

Method used

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  • Method for preparing porous graphene material
  • Method for preparing porous graphene material

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Embodiment 1

[0024] MgO particles with an average particle size of 10 nm were dispersed in tetrahydrofuran by ultrasonic at a weight ratio of 1:10 to prepare a dispersion liquid, and CoCl 2 With polypropylene according to MgO: CoCl 2 : Polypropylene weight ratio 0.001: 0.001: 1, mixed evenly, vacuumed to remove the solvent, and then placed in an inert atmosphere nitrogen for heat treatment at 400°C for 300 minutes. After cooling, the solid was collected, washed fully in dilute hydrochloric acid, filtered and washed to medium properties, drying existing porous graphene materials.

Embodiment 2

[0026] CaO particles with an average particle size of 2 nm were dispersed in tetrahydrofuran by ultrasonic at a weight ratio of 1:100 to prepare a dispersion liquid, and NiSO 4 and polyethylene according to CaO:NiSO 4 : The weight ratio of polyethylene is 0.01:0.005:1 and mixed evenly. After vacuuming to remove the solvent, heat treatment at 1000°C in an inert atmosphere nitrogen for 0.5 minutes. After cooling, collect the solid, wash it fully in dilute hydrochloric acid, and filter it with water Neutral, drying existing porous graphene materials.

Embodiment 3

[0028] CeO with an average particle size of 200 nm 2 The particles were dispersed in nitrogen and nitrogen dimethylformamide by ultrasonic dispersion at a ratio of 1:1000 by weight, and FeSO 4 with PS by CeO 2 : FeSO 4 : polystyrene weight ratio of 0.01:1:1, mixed evenly, vacuumed to remove the solvent, and then placed in an inert atmosphere of nitrogen for heat treatment at 600°C for 50 minutes. After cooling, collect the solid, wash it fully in dilute hydrochloric acid, filter and wash with water To neutral, dry the existing porous graphene material.

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Abstract

The invention provides a method for preparing a porous graphene material. The method comprises the following steps of: (1) dispersing nano granules of a metal oxide into a solvent; (2) adding a soluble salt of a graphitization catalyst and a polymer into the product obtained in the step (1), and performing uniform mixing; (3) heating and vacuumizing the product obtained in the step (2) to remove the solvent; (4) thermally treating the product obtained in the step (3) for 0.5 to 400 minutes in inert atmosphere at the temperature of between 500 and 1,000 DEG C, and collecting a solid product after cooling; and (5) treating the solid product by using dilute acid to dissolve and remove the catalyst and the nano granules of the metal oxide so as to obtain the porous graphene material. The porous graphene material prepared by using the method has low oxygen content and high graphitization degree, and holes with diameter of more than 2 nanometers are distributed on the graphene sheet layer. The preparation method is simple, the raw materials are easily obtained, and the preparation method can be used for batch preparation and is easy to realize industrialized production.

Description

technical field [0001] The invention relates to a method for preparing nanomaterials, in particular to a method for preparing porous graphene in batches. Background technique [0002] Graphene material is a nano-scale graphite material composed of single-layer graphite. Due to its excellent electrical conductivity, thermal conductivity and mechanical properties, it has great potential application value in the fields of nano-devices, heat conduction, electrical conduction and energy storage. The theoretical specific surface area is as high as 2600m 2 / g, with outstanding thermal conductivity (3000W / (m K)) and mechanical properties (1060GPa), as well as high-speed electron mobility at room temperature (15000cm 2 / (V·s)). Porous graphene is to manufacture some nanometer-sized holes in the graphene sheet by physical or chemical methods. This structure makes graphene not only have a high specific surface area when it is used as an energy source, catalyst or adsorption material,...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y40/00
Inventor 范壮军魏彤闫俊赵乾坤
Owner HARBIN ENG UNIV
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