Direct microwave production of graphene
AssigneeGlobal Graphene Group, Inc.
InventorsYi-Jun Lin, Aruna Zhamu, Bor Z. Jang
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Abstract
Provided is a method of producing graphene directly from a non-intercalated and non-oxidized graphitic material, comprising: (a) dispersing the graphitic material in a liquid solution to form a suspension, wherein the graphitic material has never been previously exposed to chemical intercalation or oxidation; and (b) subjecting the suspension to microwave or radio frequency irradiation with a frequency and an intensity for a length of time sufficient for producing graphene; wherein the liquid solution contains a metal salt dissolved in water, organic solvent, ionic liquid solvent, or a combination thereof. The method is fast (minutes as opposed to hours or days of conventional processes), environmentally benign, and highly scalable.
Claims17
A method of producing graphene directly from a non-intercalated and non-oxidized graphitic material, said method comprising:
- (a) dispersing said graphitic material in a liquid solution to form a suspension, wherein said graphitic material has never been previously exposed to chemical intercalation or oxidation;
- and
- (b) subjecting said suspension to microwave or radio frequency irradiation with a frequency and an intensity for a length of time sufficient for producing said graphene;
- wherein said liquid solution contains a metal salt dissolved in water, organic solvent, ionic liquid solvent, or a combination thereof, wherein said liquid solution has a salt concentration from 0.01 M to 10 M;
- wherein said method does not include strong acids.
A method of producing graphene directly from a non-intercalated and non-oxidized graphitic material, said method comprising:
- (a) dispersing said graphitic material in a liquid solution to form a suspension, wherein said graphitic material has never been previously exposed to chemical intercalation or oxidation;
- and
- (b) subjecting said suspension to microwave or radio frequency irradiation;
- wherein said liquid solution contains a metal salt, excluding lithium salt, aluminum salt, iron salt, copper salt, sodium salt, or a combination thereof, dissolved in water, organic solvent, ionic liquid solvent, or a combination thereof wherein said microwave or radio frequency irradiation time is from 1 minute to 60 minutes.
Dependencies are inferred from the claim text.