Method for the manufacture of reduced graphene oxide from expanded Kish graphite
AssigneeArcelorMittal
InventorsThi Tan Vu, David Noriega Perez, Roberto Suarez Sanchez
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Abstract
A method for the manufacture of reduced graphene oxide from kish graphite including: A. The provision of kish graphite, B. Optionally, a pre-treatment of kish graphite, C. The intercalation of kish graphite with a persulfate salt and an acid at room temperature to obtain intercalated kish graphite, D. The expansion of the intercalated kish graphite to obtain expanded kish graphite and E. An oxidation step of the expanded kish graphite to obtain graphene oxide and F. A reduction of graphene oxide into reduced graphene oxide.
Claims30
A method for manufacture of reduced graphene oxide from kish graphite comprising:
- A. providing kish graphite,
- B. optionally, pre-treating the kish graphite,
- C. intercalation of the kish graphite with a persulfate salt and an acid at room temperature to obtain intercalated kish graphite,
- D. expansion of the intercalated kish graphite at room temperature to obtain expanded kish graphite,
- E. oxidation of the expanded kish graphite to obtain graphene oxide, and
- F. reduction of the graphene oxide into reduced graphene oxide having oxygen functional groups including ketone groups, carboxyl groups, epoxy groups and hydroxyl groups,
- wherein the reduced graphene oxide has 25%, or less, of the oxygen functional groups by weight, wherein the expansion of the intercalated kish graphite at room temperature lasts from 2 to 5 minutes.
A method for manufacture of reduced graphene oxide from kish graphite comprising:
- A. providing kish graphite,
- B. optionally, pre-treating the kish graphite,
- C. intercalation of the kish graphite with a persulfate salt and an acid at room temperature to obtain intercalated kish graphite,
- D. expansion of the intercalated kish graphite at room temperature to obtain expanded kish graphite,
- E. oxidation of the expanded kish graphite to obtain graphene oxide and
- F. reduction of the graphene oxide into reduced graphene oxide having oxygen functional groups including ketone groups, carboxyl groups, epoxy groups and hydroxyl groups,
- wherein the oxidation of the expanded kish graphite to obtain graphene oxide lasts from 10 minutes to 1 hour, and
- wherein the expansion of the intercalated kish graphite at room temperature lasts from 2 to 5 minutes.
Dependencies are inferred from the claim text.