Graphene oxide reducing agent and method for preparing reduced graphene oxide using the same

Patent metadata

Field	Value
Publication number	US-9284194-B2
Application number	US-201313963572-A
Country	US
Kind code	B2
Filing date	Aug 9, 2013
Priority date	Feb 11, 2011
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

An agent for reducing graphene oxide and a method for preparing reduced graphene oxide or graphene are provided. An agent for reducing graphene oxide include a mixture of a reducing agent containing a halogen element with trifluoroacetic acid (CF 3 COOH).

First claim

What is claimed is:

1. A method of preparing reduced graphene oxide, comprising:
reacting graphene oxide with an agent for reducing graphene oxide,
wherein the agent for reducing graphene oxide includes a mixture of a reducing agent containing a halogen element with trifluoroacetic acid (CF 3 COOH).

2. The method of preparing reduced graphene oxide of claim 1 , wherein the reacting is performed at a temperature of −20° C. or higher.

3. The method of preparing reduced graphene oxide of claim 2 , wherein the reacting is performed at a temperature of −10° C.

4. The method of preparing reduced graphene oxide of claim 2 , wherein the reacting is performed in a temperature range of −20° C. or higher to 120° C. or lower.

5. The method of preparing reduced graphene oxide of claim 1 , wherein the reducing agent containing a halogen element comprises one selected from the group consisting of HI, HCl and HBr.

6. The method of preparing reduced graphene oxide of claim 5 , wherein the reducing agent containing a halogen element comprises HI.

7. The method of preparing reduced graphene oxide of claim 1 , wherein the graphene oxide is in a form of powder, paper or film.

8. The method of preparing reduced graphene oxide of claim 1 , wherein the graphene oxide is added to a solvent comprising the trifluoroacetic acid, and then the reducing agent containing a halogen element is added to the solvent to react the graphene oxide.

9. The method of preparing reduced graphene oxide of claim 8 , further comprising:
performing an ultrasonic treatment before the reducing agent containing a halogen element is added.

10. The method of preparing reduced graphene oxide of claim 8 , wherein the reducing agent containing a halogen element comprises HI.

11. The method of preparing reduced graphene oxide of claim 7 , wherein the graphene oxide in the form of paper or film is immersed in the mixture of the reducing agent containing a halogen element with CF 3 COOH.

12. The method of preparing reduced graphene oxide of claim 7 , wherein the graphene oxide in the form of paper or film is reacted with vapor gas which is evaporated from the mixture of the reducing agent containing a halogen element with CF 3 COOH.

13. A method of producing graphene, the method comprising:
reducing graphene oxide in a presence of a reducing agent including a halogen element and a solvent, the solvent including an acidic compound that is a weaker acid than the reducing agent.

14. The method of claim 13 , wherein the acidic compound is trifluoroacetic acid (CF 3 COOH).

15. The method of claim 13 , further comprising:
dispersing the graphene oxide in the solvent before reducing the graphene oxide in the presence of the reducing agent.

16. The method of claim 13 , wherein the reducing agent is one selected from the group consisting of HI, HCl and HBr.

Assignees

• Univ Sungkyunkwan Res & Bus

Inventors

• Lee Hyoyoung
• Cui Peng

Classifications

• C01B31/0446 Primary

  Chemistry & Metallurgy · mapped topic

• C01B31/0476

  Chemistry & Metallurgy · mapped topic

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• B01J19/10

  employing sonic or ultrasonic vibrations · CPC title