US 12,269,744 B2
One-pot process for synthesis of graphene and graphene-derivatives from coal
Roop L. Mahajan, Fairfax, VA (US); and Seul-Yi Lee, Blacksburg, VA (US)
Assigned to Virginia Tech Intellectual Properties, Inc., Blacksburg, VA (US)
Appl. No. 17/415,445
Filed by VIRGINIA TECH INTELLECTUAL PROPERTIES, INC., Blacksburg, VA (US)
PCT Filed Dec. 17, 2019, PCT No. PCT/US2019/066941
§ 371(c)(1), (2) Date Jun. 17, 2021,
PCT Pub. No. WO2020/131928, PCT Pub. Date Jun. 25, 2020.
Claims priority of provisional application 62/780,502, filed on Dec. 17, 2018.
Prior Publication US 2022/0024771 A1, Jan. 27, 2022
Int. Cl. C01B 32/198 (2017.01); B01J 19/14 (2006.01); C01B 32/194 (2017.01); C01B 32/196 (2017.01)
CPC C01B 32/198 (2017.08) [B01J 19/14 (2013.01); C01B 32/194 (2017.08); C01B 32/196 (2017.08); C01P 2002/85 (2013.01); C01P 2004/03 (2013.01); C01P 2004/04 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of producing graphene oxide, the method comprising placing a purified coal powder in a mild oxidation atmosphere at an elevated temperature with respect to room temperature for a period of time to produce a mixture comprising the graphene oxide, wherein the mixture comprises one or more impurities comprising unreacted coal impurities, unexfoliated coal impurities, or a combination thereof;
wherein the method further comprises separating the graphene oxide from the one or more impurities;
and wherein the separating the graphene oxide from the one or more impurities comprises one or more of mechanical exfoliation, centrifugation, filtrations, and sedimentation.