US 11,731,875 B2
Methods for production of graphene oxide
Patrick Johnson, Laramie, WY (US); and Ana Paula Martins Leandro, Laramie, WY (US)
Assigned to UNIVERSITY OF WYOMING, Laramie, WY (US)
Filed by UNIVERSITY OF WYOMING, Laramie, WY (US)
Filed on Jan. 14, 2021, as Appl. No. 17/149,242.
Claims priority of provisional application 62/961,550, filed on Jan. 15, 2020.
Prior Publication US 2021/0214231 A1, Jul. 15, 2021
Int. Cl. C01B 32/198 (2017.01)
CPC C01B 32/198 (2017.08) 30 Claims
OG exemplary drawing
 
1. A method of producing a graphene oxide product, the method comprising:
contacting a carbon-containing feedstock with an oxidizing composition comprising aqueous nitric acid to from a reactant slurry wherein the concentration of nitric acid is 50 to 63 wt % in the reactant slurry;
controlling the temperature of the reactant slurry during the contacting step to a temperature between 50 and 90° C.;
in response to the contacting step, oxidizing the carbon-containing feedstock of the reactant slurry to form a graphite oxide slurry; and
processing the graphite oxide slurry into a graphene oxide product.