One-step production of graphene materials

摘要

A method of producing exfoliated graphite or graphene from a graphitic or carbonaceous material. The method includes: (a) dispersing a graphitic material in a liquid intercalating agent to form a suspension; and (b) subjecting the suspension to microwave or radio frequency irradiation for a length of time sufficient for producing the exfoliated graphite or graphene. In one preferred embodiment, the intercalating agent is an acid or an oxidizer, or a combination of both. The method enables production of more electrically conducting graphene sheets directly from a graphitic material without going through the chemical intercalation or oxidation procedure. The process is fast (minutes as opposed to hours or days of conventional processes), environmentally benign, and highly scalable.

主权项

1. A method of producing exfoliated graphite or graphene directly from a non-intercalated and non-oxidized graphitic material, said method comprising:
a) dispersing said graphitic material in a liquid intercalating agent to form a suspension, wherein said graphitic material has never been previously exposed to chemical intercalation or oxidation; and b) subjecting said suspension to microwave or radio frequency irradiation with a frequency and an intensity for a length of time sufficient for producing said exfoliated graphite or graphene.