Method of manufacturing graphene using doped carbon materials

Patent metadata

Field	Value
Publication number	US-2017190580-A1
Application number	US-201615393192-A
Country	US
Kind code	A1
Filing date	Dec 28, 2016
Priority date	Dec 30, 2015
Publication date	Jul 6, 2017
Grant date	—

Abstract

Provided is a method of manufacturing graphene by unzipping doped carbon materials by an external stimulus and a graphene manufactured therefrom.

First claim

What is claimed is:

1 . A method of manufacturing graphene, wherein the graphene is formed by unzipping doped carbon materials by an external stimulus.

2 . The method of claim 1 , wherein the external stimulus is at least any one or two selected from a physical external stimulus and a chemical external stimulus.

3 . The method of claim 2 , wherein the physical external stimulus is at least any one or two selected from a sound wave, light energy, electric energy, an external pressure, and an external tension.

4 . The method of claim 2 , wherein the method includes applying the physical external stimulus to the doped carbon materials.

5 . The method of claim 2 , wherein the method includes:
a) transferring the doped carbon materials to an electrode and then heat-treating the electrode to attach the doped carbon materials to the electrode; and b) putting the electrode, to which the doped carbon materials are attached, in an electrolyte including an oxidizer and applying a voltage to the electrode to perform an oxidation reaction.

6 . The method of claim 5 , wherein the oxidizer is at least any one or two selected from sulfuric acid, nitric acid, phosphoric acid, hydrochloric acid, hydrofluoric acid, salts thereof, and an aqueous solution thereof.

7 . The method of claim 5 , wherein the voltage ranges from 0.01 to 5.0 V.

8 . The method of claim 2 , wherein the method includes:
a) transferring the doped carbon materials to an electrode and then heat-treating the electrode to attach the doped carbon materials to the electrode; and b) putting the electrode, to which the doped carbon materials are attached, in an electrolyte including an oxidizer and applying a voltage to the electrode to perform an oxidation reaction; and c) applying a physical external stimulus to the oxidized carbon materials.

9 . The method of claim 8 , wherein the oxidizer is at least any one or two selected from sulfuric acid, nitric acid, phosphoric acid, hydrochloric acid, hydrofluoric acid, salts thereof, and an aqueous solution thereof.

10 . The method of claim 9 , wherein the oxidizer is sulfuric acid or sulfuric acid solution.

11 . The method of claim 10 , wherein a concentration of the sulfuric acid solution ranges from 0.001 to 10 M.

12 . The method of claim 8 , wherein the voltage ranges from 0.01 to 5.0 V

13 . The method of claim 1 , wherein the method includes:
i) depositing a metal catalyst on a substrate; ii) growing the doped carbon materials on the metal catalyst; and iii) etching the substrate with an etchant to separate the doped carbon materials.

14 . The method of claim 1 , wherein the doped carbon materials are doped with a hetero atom of at least any one selected from nitrogen, phosphorus, arsenic, antimony, bismuth, boron, aluminum, gallium, indium and thallium.

15 . The method of claim 14 , wherein the hetero atom doped on the doped carbon materials is coordinately bonded to at least one metal element.

16 . The method of claim 15 , wherein the metal element is at least any one or two selected from Fe, Ni, Cu, W, V, Cr, Sn, Co, Mn, Mo, Mg, Al, Si, Zr, Ti, Ru, Pt, Ag, Au, Pd, Rh, Ir, Ta, Nb, Zn, and Cd.

17 . The method of claim 14 , wherein the doped carbon materials are doped at an element ratio that is 0.001 to 10% of hetero atom with respect to the entire carbon atom.

18 . The method of claim 1 , wherein the doped carbon materials are at least any one or two selected from single-walled carbon nanotube, double-walled carbon nanotube, triple-walled carbon nanotube, multi-walled carbon nanotube, and superfine carbon nanotube.

19 . A graphene manufactured by unzipping doped carbon materials by an external stimulus and having an edge formed with carbonyl.

20 . The graphene of claim 19 , wherein the graphene satisfies the following Formulas 2 to 5 in C1s spectrum obtained by an X-ray photoelectron spectroscopy (XPS).
0.01≦ X 2 /X 1 ≦0.15   [Formula 2]
0.01≦ X 3 /X 1 ≦0.2   [Formula 3]
0.01≦ X 4 /X 1 ≦0.1   [Formula 4]
0.5≦ X 3 /X 2≦ 1,000   [Formula 5]
(In the above Formulas 2 to 5, X 1 represents a peak area of carbon-carbon double bonding, X 2 represents a peak area of carbon-oxygen single bonding, X 3 represents a peak area of carbon-oxygen double bonding, and X 4 represents a peak area of a carboxyl.)

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Kim Sang Ouk
• LIM Joonwon
• Lee Ho Jin

Classifications

• C01B32/184 Primary

  Preparation · CPC title

• C01B32/23

  Oxidation · CPC title

• C01B31/043 Primary

  Chemistry & Metallurgy · mapped topic

• C01B31/0446

  Chemistry & Metallurgy · mapped topic