公开(公告)号：US12269744B2

公开(公告)日：2025-04-08

申请号：US17415445

申请日：2019-12-17

Applicant: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

Inventor： Roop L. Mahajan ,  Seul-Yi Lee

IPC: C01B32/198 ,  B01J19/14 ,  C01B32/194 ,  C01B32/196

Abstract: Methods of making graphene oxide and reduced graphene oxide are provided. The methods can include a simple one-pot synthesis of graphene oxide from a purified coal powder using a mild oxidizing acid. The methods provide for an improved, more cost-effective, and simpler process than conventional methods such as Hummers methods. In some aspects, placing the purified coal powder in the mild oxidation atmosphere includes contacting the purified coal powder with a mild oxidizing acid such as nitric acid, nitrous acid, sulfuric acid, phosphoric acid, benzoic acid, or a combination thereof. In some aspects, the mild oxidizing acid consists essentially of nitric acid. Graphene oxides and reduced graphene oxides prepared by the methods are also provided.