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Graphene-based porous macroscopic carbon material and preparation method thereof

A macroscopic and carbon material technology, applied in the field of porous macroscopic carbon materials, can solve the problems of difficult to achieve the theoretical specific surface area of ​​graphene, difficult to obtain specific surface area, etc., to achieve controllable product shape and structure, wide range of raw material sources, reduce Aggregate effect

Active Publication Date: 2011-03-30
深圳清研紫光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the easy aggregation of graphene sheets, it is difficult to obtain a large specific surface area for graphene-based assemblies, and it is even more difficult to achieve the theoretical specific surface area of ​​graphene of 2630m 2 / g

Method used

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  • Graphene-based porous macroscopic carbon material and preparation method thereof
  • Graphene-based porous macroscopic carbon material and preparation method thereof
  • Graphene-based porous macroscopic carbon material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Weigh 160 mg of graphite oxide powder material prepared by the Hummer method, add 80 mL of deionized water, and ultrasonically disperse for 2 h at a power of 200 W to obtain a graphene oxide hydrosol; take 84.718 mL of the uniformly dispersed graphene oxide hydrosol and add 100 mL Add 282μL of 20mg / mL PVA solution into the kettle, stir and then ultrasonically disperse for 20min; put the hydrothermal reaction kettle in a muffle furnace with a temperature of 150℃ for 20h; wait for the hydrothermal reaction kettle After cooling, open the inner tank, pour out the water phase to obtain a smooth cylindrical material, and freeze-dry it at -57°C for 24 hours to obtain a graphene oxide block material; under the protection of argon, the temperature is raised at 5°C / min to The temperature is 300°C, the temperature is kept constant for 2 hours, and then the temperature is raised to 800°C at 5°C / min, and the temperature is kept constant for 3 hours to obtain a graphene-based porous m...

Embodiment 2

[0017] Weigh 160 mg of graphite oxide powder material prepared by the Hummer method, add 80 mL of deionized water, and ultrasonically disperse for 2 h at a power of 200 W to obtain a graphene oxide hydrosol; take 84.158 mL of the uniformly dispersed graphene oxide solution and add 100 mL of Add 842μL of 20mg / mL PVA solution to the hydrothermal reaction kettle, stir and then ultrasonically disperse for 20min; put the hydrothermal reaction kettle in a muffle furnace at 150°C for 20h; wait for the hydrothermal reaction kettle to cool down Open the liner, pour out the water phase, and freeze-dry at -57°C for 24 hours to obtain the graphene oxide block material; raise the temperature to 300°C at 5°C / min under the condition of argon, and keep the temperature at 300°C for 2 hours. Then the temperature was raised to 1000°C at 5°C / min, and the graphene-based porous macroscopic carbon material was obtained after constant temperature for 3 hours. The specific surface area of ​​the materia...

Embodiment 3

[0019] Weigh 160 mg of graphite oxide powder material prepared by the Hummer method, add 80 mL of deionized water, and ultrasonically disperse for 2 h at a power of 200 W to obtain a graphene oxide hydrosol; take 84.83 mL of the uniformly dispersed graphene oxide solution and add 100 mL of Add 170μL of 20mg / mL PVA solution to the hydrothermal reaction kettle, stir and then ultrasonically disperse for 20min; put the hydrothermal reaction kettle in a muffle furnace at 120°C for 20h; wait for the hydrothermal reaction kettle to cool down Open the liner, pour out the water phase, and freeze-dry at -57°C for 24 hours to obtain the graphene oxide block material; raise the temperature to 300°C at 5°C / min under the condition of argon, and keep the temperature at 300°C for 2 hours. Then the temperature was raised to 800°C at 5°C / min, and the graphene-based porous macroscopic carbon material was obtained after constant temperature for 3 hours. The specific surface area of ​​the material ...

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Abstract

The invention relates to a graphene-based porous macroscopic carbon material and a preparation method thereof, belonging to the technical field of porous macroscopic carbon materials. The material comprises graphene and carbon from polyvinyl alcohol and has large specific surface area. The preparation method comprises the following processes of: mixing a graphene oxide water solution and a polyvinyl alcohol solution, and placing the uniformly mixed solution into a hydro-thermal reaction kettle to obtain a graphene-based hydrogel; freezing and drying the hydrogel to obtain a graphene-based aerosol; and carrying out thermal treatment on the aerosol under the protection of an argon gas atmosphere to obtain the graphene-based porous macroscopic carbon material. The invention has the following advantages of simple preparation process and wide raw material source scope; and the prepared porous macroscopic carbon material has the following advantages of well-developed pore structure, extra-large specific surface area, favorable structural stability and wide application range.

Description

technical field [0001] The invention relates to a graphene-based porous macroscopic carbon material and a preparation method thereof, belonging to the technical field of porous macroscopic carbon materials. Background technique [0002] Graphene, discovered in 2004, has attracted widespread attention because of its unique structure and peculiar physical and chemical properties. Perfect graphene is a one-atom-thick two-dimensional crystal composed of six-membered rings of carbon according to a honeycomb structure, and is considered to build other dimensions sp 2 The basic structural unit of hybrid carbonaceous materials. Graphene has strong chemical stability; its strength is the highest among the tested materials, more than 100 times that of steel; it has a large specific surface area and is a real surface solid; it has excellent electrical and thermal conductivity, Has special electrical properties, such as quantum Hall effect and so on. These attractive properties motiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/00C01B31/02
Inventor 杨全红陶莹吕伟
Owner 深圳清研紫光科技有限公司
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