Back to results
US 12,434,250 B2Granted
Method of forming graphene quantum dots from coal
AssigneeEnergy & Environmental Research Center
InventorsAlexander Azenkeng, Jason D. Laumb
Life of this patent
Estimating the term…
Abstract
Upgraded coal, method of forming the same, and graphene films and quantum dots made therefrom. A method of upgrading coal includes cleaning coal to form a cleaned coal residue. The method also includes (A) reacting the cleaned coal residue with an oxidizable inorganic metallic agent, or (B) reacting the cleaned coal residue with a reducing agent, or a combination thereof, to form the upgraded coal.
Claims20
A method of forming a graphene quantum dot, the method comprising:
- forming the graphene quantum dot from upgraded coal, wherein the upgraded coal has a lower oxygen concentration as compared to naturally-sourced coal used to form the upgraded coal, and wherein the upgraded coal comprises
- an ash content of less than 5 wt %,
- an oxygen concentration of 10 wt % to 25 wt %, and
- a carbon concentration of 40 wt % to 75 wt %.
1 more element
A method of forming a graphene quantum dot, the method comprising:
- reacting a coal residue with a reducing agent to form an upgraded coal, wherein the upgraded coal has a lower oxygen concentration as compared to a naturally-sourced coal used to form the coal residue;
- and
- forming the graphene quantum dot from the upgraded coal.
Dependencies are inferred from the claim text.