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Method used for preparing vertical graphene film taking biomass as raw material

A graphene film and biomass technology, applied in the field of nano-carbon materials, can solve the problem of low yield of vertical graphene film and achieve the effect of high defect density

Pending Publication Date: 2019-11-01
王志朋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the synthesis process mentioned above, the temperature of the substrate is required to be above 400°C, and the yield of the vertical graphene film is relatively low.
Therefore, the method of how to make low-temperature, fast-growing vertical graphene is very challenging, and of great significance, it is very necessary

Method used

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  • Method used for preparing vertical graphene film taking biomass as raw material
  • Method used for preparing vertical graphene film taking biomass as raw material
  • Method used for preparing vertical graphene film taking biomass as raw material

Examples

Experimental program
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Embodiment 1

[0022] The microwave plasma bombardment method is used to prepare vertical graphene film from biomass foam. The specific method is as follows:

[0023] (1) Wash the Ni foil with acetone, alcohol and deionized water successively, dry, and cut into 5mm×6mm slices, and then make small boxes;

[0024] (2) The biomass lignocellulosic foam is crushed with a masher, and the crushed biomass foam is placed in the small box, and then placed in the plasma device (this example uses MPT- produced by Japan High Frequency Co., Ltd.) On the stage in the 1000-02 plasma device), raise the stage to the intersection of the waveguide and the quartz tube;

[0025] (3) Evacuate the reaction chamber of the plasma device for 30 minutes so that the pressure in the chamber reaches 0.1 Torr;

[0026] (4) Introduce 20sccm hydrogen and 20sccm argon into the reaction chamber, and when the pressure stabilizes to 1 Torr, ignite the microwave plasma;

[0027] (5) After the microwave plasma bombards the biomass foam for...

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Abstract

The invention provides a method used for preparing vertical graphene film taking a biomass as a raw material. According to the method, a plasma device is adopted to generate microwave plasma, at hydrogen gas and inert gas atmosphere, the microwave plasma is adopted for bombardment of the biomass on a substrate, so that the vertical graphene film is formed at a temperature lower than 200 DEG C on the substrate. The method is capable of preparing high quality vertical graphene film rapidly at a low temperature; the layer number at the edge of the graphene film is low, and defect density is relatively large, and the vertical graphene film can be taken as an excellent electrode material in supercapacitors and catalytic reaction.

Description

Technical field [0001] The invention relates to the technical field of nano carbon materials, in particular to a method for preparing a vertical graphene film. Background technique [0002] Vertical graphene film (vertical graphene), also known as carbon nanowalls, carbon nanosheets, graphene nanoflakes, etc., is different from using chemical vapor deposition parallel to metal Novel nano-carbon material with graphene grown on the surface. Vertical graphene is a three-dimensional network structure formed by mutual cross-linking of graphene sheet elements. Therefore, in addition to the excellent physical and chemical properties of conventional graphene, due to its unique topographic structure, such as growth perpendicular to the substrate, opening upward , Contains a large number of boundaries and defects, so that it has many special properties. Especially in electrochemical energy applications, vertical graphene can effectively solve the problem of graphene agglomeration. Its op...

Claims

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Application Information

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IPC IPC(8): C01B32/184H01G11/24H01G11/32H01G11/44H01G11/86
CPCC01B32/184H01G11/24H01G11/32H01G11/44H01G11/86Y02E60/13
Inventor 王志朋绪方启典
Owner 王志朋
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