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AssigneesUniversity of Guelph, Zen Graphene Solutions Ltd.
InventorsAicheng Chen, Michael Salverda, Antony Raj Thiruppathi, Boopathi Sidhureddy, Farnood Rahmati
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The present application relates to expanded graphite and exfoliated graphene oxide. More specifically, the present application relates to process for their preparation and uses thereof. The present application includes a process for preparing expanded graphite comprising: mixing graphite with H2SO4/H3PO4 to form a first mixture; adding KMnO4 to the first mixture to form a second and mixture; adding at least one Fe(III) salt to the second mixture under conditions to form a solid graphite-intercalated compound; separating the solid graphite-intercalated compound from the second mixture; and heating the solid graphite-intercalated compound under conditions to provide the expanded graphite. The present application also includes a process for preparing exfoliated graphene oxide comprising: compressing expanded graphite to form a flexible graphite foil; immersing the flexible graphite foil in a solution comprising at least one alkali metal hydroxide and optionally at least one oxidizing agent, and applying voltage under conditions to electrochemically exfoliate the flexible graphite foil to provide the exfoliated graphene oxide.
A process for preparing expanded graphite comprising:
A process for preparing exfoliated graphene oxide comprising:
A process for preparing exfoliated graphene oxide comprising:
Dependencies are inferred from the claim text.