Urchin-like graphene and preparation method thereof

A sea urchin-like and graphene technology, applied in the field of sea urchin-like graphene and its preparation, can solve the problems of single three-dimensional graphene structure and easy curling of two-dimensional graphene, achieves simple preparation process, guarantees stability and other properties, Anti-curling effect

Active Publication Date: 2019-04-19
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

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a sea urchin-shaped graphene and a preparation method thereof, so as to solve the technical problems that two-dimensional graphene is extremely easy to curl and three-dimensional graphene has a single structure in the prior art

Method used

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Embodiment 1

[0046] A preparation method for sea urchin-shaped graphene, comprising the steps of:

[0047] 1) 1.19g NiCl 2 ·6H 2 O was added to 100mL ethylene glycol, and centrifuged at 900r / min to obtain 0.05mol / L NiCl 2 solution;

[0048] Add 0.8 g NaOH to the above NiCl 2 In the solution, ensure that there is no precipitate and no precipitation, stir for 5 minutes;

[0049] Add 10.0 g of hydrazine hydrate to the above solution and stir thoroughly to obtain a green mixed solution;

[0050] Then it was transferred to a flask, kept in a water bath at 70°C, stirred for 2 hours, and the color of the solution gradually turned black;

[0051] After the reaction, the above solution was suction filtered to obtain a floc, which was washed three times with deionized water and absolute ethanol, and dried at 60°C for 30 minutes to obtain sea urchin-shaped nickel nanocrystals;

[0052] 2) Gained sea urchin-like nickel nanocrystals are put into a CVD tubular furnace, and a mixed atmosphere consi...

Embodiment 2

[0056] A preparation method for sea urchin-shaped graphene, comprising the steps of:

[0057] 1) Add 0.26g NiSO 4 ·6H 2 O was added to 100mL ethylene glycol, and centrifuged at 900r / min to obtain 0.01mol / L NiSO 4 solution;

[0058] Add 0.4 g NaOH to the above NiSO 4 In the solution, ensure that there is no precipitate and no precipitation, stir for 5 minutes;

[0059] Add 40.0g of sodium borohydride to the above solution and stir thoroughly to obtain a green mixed solution;

[0060] Then it was transferred to a flask, kept in a water bath at 50° C., stirred for 4 hours, and the color of the solution gradually turned black;

[0061] After the reaction, the above solution was suction filtered to obtain a floc, which was washed three times with deionized water and absolute ethanol, and dried at 40°C for 30 minutes to obtain sea urchin-shaped nickel nanocrystals;

[0062] 2) Gained sea urchin-shaped nickel nanocrystals are put into a CVD tubular furnace, and a mixed atmosphe...

Embodiment 3

[0066] A preparation method for sea urchin-shaped graphene, comprising the steps of:

[0067] 1) 2.91g Ni(NO 3 ) 2 ·6H 2 O was added to 100mL ethylene glycol, and centrifuged at 900r / min to obtain 0.1mol / L NiCl 2 solution;

[0068] Add 0.8 g NaOH to the above NiCl 2 In the solution, ensure that there is no precipitate and no precipitation, stir for 5 minutes;

[0069] Add 4.0g of oxalic acid to the above solution and stir thoroughly to obtain a green mixed solution;

[0070] Then it was transferred to a flask, kept in a water bath at 100°C, stirred for 1 hour, and the color of the solution gradually turned black;

[0071] After the reaction, the above solution was suction-filtered to obtain flocs, which were washed three times with deionized water and absolute ethanol, and dried at 80° C. to obtain sea urchin-shaped nickel nanocrystals.

[0072] 2) Gained sea urchin-shaped nickel nanocrystals are put into a CVD tubular furnace, and a mixed atmosphere consisting of 30 sc...

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Abstract

The invention discloses urchin-like graphene and a preparation method thereof, and relates to the field of graphene material preparation. The method includes the steps that a nickel salt and a reducing agent react under the alkaline condition, and an urchin-like three-dimensional nickel substrate is formed through self-assembly; graphene is deposited on the urchin-like three-dimensional nickel substrate with the chemical vapor deposition technology; acid is added to remove the nickel substrate, and then the urchin-like three-dimensional graphene is obtained. The urchin-like three-dimensional graphene has a good dispersing type, and the problems of stacking, porosity, unstable structure and the like are effectively prevented. The preparation process is simple, the condition is mild, the rawmaterial source is wide, and the urchin-like graphene 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 sea urchin-shaped graphene and a preparation method thereof. Background technique [0002] Graphene material is a single atomic layer material with a unique two-dimensional honeycomb structure, which has excellent electrical, thermal and mechanical properties. Based on its unique properties, graphene materials are hailed as the "king of new materials in the 21st century" by the scientific community, and are being used in various fields including energy, environment and biology. However, during the application process, it was found that graphene materials have some problems. For example, graphene with a two-dimensional structure is prone to curling due to its ultra-thin thickness, resulting in a significant decrease in its corresponding performance. It is greatly restricted in practical application. Another example is that due to the strong π-π interaction and van d...

Claims

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Application Information

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IPC IPC(8): C01B32/184
CPCC01B32/186C01P2004/30C01P2006/12C01P2004/62
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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