Milena Ojrzyńska
supervisor: Mariusz Zdrojek
High quality and high yield production of graphene flakes is the goal of today’s graphene technology that would allow commercialization and industrialization. Recently developed innovative methods still suffering from low quantities, controllable qualities, processability, and costs [1]. Here, we developed a simple, yet compelling chemical route for industry-scale production of few-layer graphene that relay on simultaneous nonoxidative intercalation and exfoliation of raw graphite in oleum with nearly 100% efficiency, one of the highest ever reported. High yield is enabled because un-bounded SO3 molecules dissolved in sulfuric acid can effectively intercalate the graphite boosting spontaneous exfoliation and providing undefected, thin graphene flakes. The X-ray and vibrational spectroscopy confirm the absence of defects and oxides in the graphene layers and the electron microscopy and diffraction method show the structure.
Acknowledgments: This research was supported by the PRELUDIUM BIS project (UMO2019/35/O/ST5/01440).