A kind of dendritic graphene and preparation method thereof

A dendritic and graphene technology, applied in graphene, chemical instruments and methods, nano-carbon and other directions, can solve problems such as graphene agglomeration, and achieve the effects of reducing other properties, fewer defects, and simple preparation process.

Active Publication Date: 2022-05-24
湖南医家智烯新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a dendritic graphene with a novel structure and a preparation method thereof, so as to solve technical problems such as the agglomeration phenomenon of graphene in the prior art

Method used

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  • A kind of dendritic graphene and preparation method thereof

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Embodiment 1

[0045] A preparation method of dendritic graphene, comprising the steps:

[0046] 1) Under stirring, slowly add ammonia water to the copper sulfate solution (60mL, 0.03mol / L), until the pH of the solution=12, stir for 10min, and then transfer it to a stainless steel reactor lined with polytetrafluoroethylene In addition, 0.29g of red phosphorus was added, and the hydrothermal reaction was carried out under the condition of 160 °C for 4 h. After the reaction was completed, it was cooled to room temperature. The obtained red product was washed three times with deionized water and absolute ethanol, and dried at 60 °C. , that is, to obtain dendritic copper nanocrystals;

[0047] 2) Put the dendritic copper gained in step 1 into the CVD tube furnace, under the mixed atmosphere of hydrogen (flow rate is 20sccm) and argon (flow rate is 800sccm), the tube furnace is heated to 1000 at a rate of 5°C / min After ℃, the hydrogen flow rate was adjusted to 100sccm, and methane gas was introd...

Embodiment 2

[0050] A preparation method of dendritic graphene, comprising the steps:

[0051] 1) Under stirring, slowly add ammonia water to the copper nitrate solution (60mL, 0.01mol / L), until the pH of the solution=10, stir for 5min, and then transfer it to a stainless steel reactor lined with polytetrafluoroethylene In addition, 0.22g of red phosphorus was added, and the hydrothermal reaction was carried out at 140 °C for 8 hours. After the reaction was completed, it was cooled to room temperature. The obtained red product was washed three times with deionized water and absolute ethanol, and dried at 60 °C. , that is, to obtain dendritic copper nanocrystals;

[0052] 2) Put the dendritic copper obtained in step 1 into the CVD tube furnace, under the mixed atmosphere of hydrogen (flow rate is 10sccm) and argon (flow rate is 600sccm), the tube furnace is heated to 800 at a rate of 5°C / min After ℃, the hydrogen flow rate was adjusted to 80sccm, and ethylene gas was introduced at a flow r...

Embodiment 3

[0055] A preparation method of dendritic graphene, comprising the steps:

[0056] 1) Under stirring, slowly add ammonia water to the cupric chloride solution (60mL, 0.05mol / L) until the pH of the solution=11, stir for 30min, and then transfer it to the stainless steel reaction lined with polytetrafluoroethylene In the kettle, 0.20g of red phosphorus was added, and the water was kept at 180°C for 2 hours to carry out a hydrothermal reaction. After the reaction was completed, it was cooled to room temperature. The obtained red product was washed three times with deionized water and absolute ethanol, respectively. drying to obtain dendritic copper nanocrystals;

[0057] 2) Put the dendritic copper gained in step 1 into the CVD tube furnace, under the mixed atmosphere of hydrogen (flow rate is 30sccm) and argon (flow rate is 1000sccm), the tube furnace is heated to 900 at a rate of 5°C / min After ℃, the hydrogen flow rate was adjusted to 120 sccm, and acetylene gas was introduced ...

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Abstract

The invention discloses a dendritic graphene and a preparation method thereof, and relates to the field of graphene material preparation. The present invention utilizes copper salt and reducing agent to react under alkaline conditions, and self-assembles to form a dendritic three-dimensional copper substrate; through chemical vapor deposition technology, graphene is deposited on the dendritic three-dimensional copper substrate; adding corrosion solution to remove the copper substrate, namely Dendritic three-dimensional graphene was obtained. The dendritic three-dimensional graphene of the present invention has a good dispersion type, and effectively prevents problems such as stacking, porosity, and unstable configuration. The preparation process of the invention is simple, the conditions are mild, and the source of raw materials is wide, which is suitable for mass production and has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of graphene materials, in particular to a dendritic graphene and a preparation method thereof. Background technique [0002] In the past 30 years, carbon nanomaterials have always been the frontier of scientific and technological innovation. From the discovery of fullerenes in 1985 to the discovery of carbon nanotubes in 1991, it quickly attracted widespread attention and great response from scientists. In 2004, British scientists Andrei Heim and Konstantin Novoselov obtained a single atomic layer of graphene by mechanical exfoliation for the first time, adding a new member to the carbon nano family. The two scientists obtained this achievement in 2010. Nobel Prize. [0003] Graphene is a two-dimensional sheet nanomaterial composed of carbon six-membered rings, which can be warped into zero-dimensional fullerenes, one-dimensional carbon nanotubes, and three-dimensional graphite. , many physical and chemica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/186C30B29/02C30B29/60C30B28/04
Inventor 杜涛李思幸贺盼盼其他发明人请求不公开姓名
Owner 湖南医家智烯新材料科技有限公司
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