Plasma process for preparing graphene nanosheets

摘要

Problem to be solved: to provide a plasma process for producing graphene nanosheets having reduced polycyclic aromatic hydrocarbon (PAH) content.Solution: forming a nucleus of the graphene nanosheet by injecting carbon containing material into the thermal region of the plasma at a standard temperature and at a standard pressure STP at a rate of at least 60 m / s, and quenching the graphene nanosheet with a quenched gas below 1000 A plasma process is provided to fabricate graphene nanosheets.The injection of carbon containing material may be performed using multiple jets.Graphene nanosheets may have 3 or more Raman g / D ratios and more than 0.8 Raman 2D / g ratios in measurements using an incident laser wavelength of 514 nm.Graphene nanosheets may be produced at a rate of at least 80 g / h.Graphene nanosheets may have a polycyclic aromatic hydrocarbon concentration less than about 0.7% by weight.Diagram