Graphene-carbon nanotube nanostructure and method of manufacturing same

Patent metadata

Field	Value
Publication number	US-9249022-B2
Application number	US-201214352640-A
Country	US
Kind code	B2
Filing date	Oct 16, 2012
Priority date	Oct 19, 2011
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

Disclosed are a method of manufacturing a graphene-carbon nanotube nanostructure which includes mixing graphite, a catalytic metal, and an ionic liquid, and then radiating microwaves on the mixture, and a graphene-carbon nanotube nanostructure manufactured using the method.

First claim

What is claimed is:

1. A method of manufacturing a graphene-carbon nanotube nanostructure, comprising:
mixing materials consisting of graphite, a catalytic metal, and an ionic liquid, the graphite and the catalytic metal being included in a ratio of 1:0.05 to 1:1, and
radiating microwaves to the mixture,
wherein in the microwave radiation on the mixture, the graphite expands in volume and forms graphene, and carbon nanotubes grow in place of the catalytic metal.

2. The method of claim 1 , wherein the catalytic metal comprises palladium (Pd), nickel (Ni), cobalt (Co), iron (Fe), or a combination thereof.

3. The method of claim 1 , further comprising grinding the catalytic metal before mixing the graphite, the catalytic metal, and the ionic liquid.

4. The method of claim 3 , wherein the ground catalytic metal has a particle size ranging from about 10 nm to 100 nm.

5. The method of claim 1 , wherein the ionic liquid comprises at least one of a 1-ethyl-3-methylimidazolium (EMIM)-based ionic liquid and a 1-butyl-3-methylimidazolium (BMIM)-based ionic liquid.

6. The method of claim 5 , wherein the 1-ethyl-3-methylimidazolium (EMIM)-based ionic liquid comprises 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium chloride, 1-ethyl-3-methylimidazolium trifluoroethane sulfonate, and 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide, and
the 1-butyl-3-methylimidazolium (BMIM)-based ionic liquid comprises 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium trifluoroethane sulfonate, and 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide.

7. The method of claim 1 , wherein the graphite and the ionic liquid are included in a ratio of 1:0.1 to 1:1.

8. The method of claim 1 , wherein the graphite, the catalytic metal and the ionic liquid are included in a ratio of 1:0.2:0.5.

9. The method of claim 1 , wherein the mixture is prepared by mixing the catalytic metal and the ionic liquid, and then adding the graphite thereto.

10. The method of claim 9 , further comprising ultrasonication after performing at least one of mixing the catalytic metal and the ionic liquid and adding the graphite thereto.

11. The method of claim 1 , wherein the microwave radiation on the mixture is performed by radiating microwaves with an intensity of 100 to 2000 W.

12. The method of claim 11 , wherein the microwave radiation on the mixture is performed by radiating microwaves for 1 to 1000 seconds.

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Oh Il-Kwon
• Sridhar Vadahanambi
• Kim Hyun-Jun

Classifications

• B01J23/44

  Palladium · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• C01B32/16 Primary

  Preparation · CPC title

• C01B32/194 Primary

  After-treatment · CPC title

• C01B2204/22

  Electronic properties · CPC title