Graphene/graphene oxide core/shell particulates and methods of making and using the same
AssigneeKansas State University Research Foundation
InventorsStefan H. Bossmann, Christopher Sorensen, Jose Covarrubias, Madumali Kalubowilage, Arjun Nepal
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Abstract
Methods of preparing graphene/graphene oxide particulates under mild conditions, comprising reacting pristine graphene with hydrogen peroxide and a source of iron to oxidize the outer surface of the pristine graphene particulates in solution and yield graphene/graphene oxide particulates. Methods and articles incorporating the same are also disclosed.
Claims25
A graphene/graphene oxide particulate comprising a multi-layered pristine graphene core with a thin graphene oxide surface coating or shell, wherein said graphene oxide surface coating or shell comprises one or more functional groups, wherein said one or more functional groups comprises greater than 90% carboxylic acid groups, wherein said particulate comprises at least 85% carbon and up to about 15% oxygen.
The graphene/graphene oxide particulate 21, wherein said particulate is prepared by oxidizing the surface of detonation-synthesized graphene fractal aggregates.
The graphene/graphene oxide particulate 21, wherein said oxidation is carried out using hydrogen peroxide as the oxidizing agent at a temperature of 100° C. or less.
The graphene/graphene oxide particulate 21, wherein said multi-layered pristine graphene core comprises up to 15 graphene layers.
The graphene/graphene oxide particulate 1, wherein said one or more surface functional groups comprises greater than 95% carboxylic acid groups.
Dependencies are inferred from the claim text.