Method for electrocatalytic preparation of zero-defect disorderly stacked graphene nanofilm and application

A graphene film, defect-free technology, applied in the direction of graphene, chemical instruments and methods, nano-carbon, etc., can solve the problems of high requirements for graphene preparation, and achieve the goals of improving light conversion efficiency, high sound clarity, and reducing repair temperature Effect

Pending Publication Date: 2019-06-25
HANGZHOU GAOXI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The most important thing is that the preparation of AB stacked graphene has higher requirements (higher temperature and maintenance time), and the non-AB structure in optoelectronic applications is more conducive to the migration of photoelectrons, and there is no graphene dominated by random layer stacking structure. membrane

Method used

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  • Method for electrocatalytic preparation of zero-defect disorderly stacked graphene nanofilm and application
  • Method for electrocatalytic preparation of zero-defect disorderly stacked graphene nanofilm and application
  • Method for electrocatalytic preparation of zero-defect disorderly stacked graphene nanofilm and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) The graphene oxide is formulated into a graphene oxide aqueous solution with a concentration of 0.5ug / mL, and the mixed cellulose ester (MCE) is used as a substrate to suction and filter into a film.

[0039] (2) Place the graphene oxide film attached to the MCE film in an airtight container and fumigate at a high temperature of 60 degrees HI for 1 hour.

[0040] (3) Coating the melted paraffin uniformly on the surface of the reduced graphene oxide film by evaporation, casting, etc., and slowly cooling at room temperature.

[0041] (4) The graphene film coated with the solid transfer agent is slowly washed with ethanol to dissolve the MCE film.

[0042] (5) The graphene film supported by the solid transfer agent obtained above is slowly volatilized off the solid transfer agent at 120 degrees to obtain an independent self-supporting graphene film, the thickness of the graphene film is about 30 atomic layers, and the transparency is 95 %.

[0043] (6) Gradually heat the graphe...

Embodiment 2

[0048] (1) The graphene oxide is formulated into a graphene oxide aqueous solution with a concentration of 10ug / mL, and the mixed cellulose ester (MCE) is used as a substrate to suction and filter to form a film.

[0049] (2) Place the graphene oxide film attached to the MCE film in an airtight container and fumigate at a high temperature of 100 degrees HI for 10 hours.

[0050] (3) Coating the melted rosin uniformly on the surface of the reduced graphene oxide film by evaporation, casting, etc., and slowly cooling at room temperature.

[0051] (4) Place the graphene film coated with the solid transfer agent in acetone to remove the MCE film.

[0052] (5) The graphene film supported by the solid transfer agent obtained above slowly volatilizes the rosin at 300 degrees to obtain an independent self-supporting graphene film with a thickness of about 60 atomic layers and a transparency of 10%.

[0053] (6) Gradually heat the graphene film to 2000°C at a rate of 45°C / min for 1 hour, and the...

Embodiment 3

[0058] (1) The graphene oxide is formulated into a graphene oxide aqueous solution with a concentration of 8ug / mL, and the mixed cellulose ester (MCE) is used as a substrate to suction and filter to form a film.

[0059] (2) Place the graphene oxide film attached to the MCE film in a closed container and fumigate for 8 hours at 80 degrees HI.

[0060] (3) Coat the melted norbornene uniformly on the surface of the reduced graphene oxide film by evaporation, casting, etc., and cool slowly at room temperature.

[0061] (4) Place the graphene film coated with the solid transfer agent in isopropanol to remove the MCE film.

[0062] (5) The graphene film supported by the solid transfer agent obtained above is slowly volatilized off the solid transfer agent at 100 degrees to obtain an independent self-supporting graphene film with a thickness of about 200 atomic layers.

[0063] (6) Gradually raise the graphene film to 2000°C with a heating rate of 20°C / min for 1 hour, and then energize the fi...

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Abstract

The invention discloses a method for electrocatalytic preparation of a zero-defect disorderly stacked graphene nanofilm. The graphene film is obtained by heat treatment and electric treatment of an independent self-supported graphene film. The independent self-supported graphene film is gradually heated to 2000DEG C (1-60DEG C per minute) and the state is maintained for 1-2h, thus repairing most defect structures and keeping the disorderly stacked state graphene sheets at the same time. Then, the film is electrified to activate carbon atoms and promote the flow of carbon atoms, thus further repairing atomic structure defects. The combined action of the two greatly reduces the defect structure repair temperature of the graphene film. The graphene film has a horizontal direction thermal conductivity up to 2500W / mK and electrical conductivity up to 2.1MS / m, and a photoelectric detection wavelength range up to terahertz, thus having wide application.

Description

Technical field [0001] The invention relates to a high-performance nano material and a preparation method thereof, in particular to a method and application for electrocatalytic preparation of a defect-free random-layer stacked graphene nano-film. By this method, a defect-free random-layer stacked graphene nano film with nano-level thickness can be obtained membrane. Background technique [0002] In 2010, two professors, Andre GeiM and Konstantin Novoselov from the University of Manchester in the United Kingdom won the Nobel Prize in Physics for successfully separating stable graphene for the first time, setting off a worldwide upsurge in graphene research. Graphene has excellent electrical properties (the electron mobility can reach 2×10 at room temperature 5 cM 2 / Vs), outstanding thermal conductivity (5000W / (MK), extraordinary specific surface area (2630 M 2 / g), its Young's modulus (1100GPa) and breaking strength (125GPa). The excellent electrical and thermal conductivity of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/194C01B32/184B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/184C01B32/194
Inventor 高超彭蠡许震刘一晗
Owner HANGZHOU GAOXI TECH CO LTD
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