| 초록 |
In order to extend the application of graphene in various fields, it is crucial to produce a large quantity of defect-free graphene. While liquid-based exfoliation methods have been of interest, they still showed a yield problem. In this work, we suggest a recycling method using Taylor-Couette flow for a bulk production of few-layered graphene which has a low degree of defect. A graphite-dispersed solution with a surfactant SDS (sodium dodecyl sulfate) was processed in the gap between two coaxial cylinders followed by centrifugation. A supernatant of the resultant solution was decanted and the rest of the solution was recycled to the Taylor-Couette equipment again. The repeated steps provided a high-yield mono / few-layered graphene with less defects. The prepared graphene was characterized by Raman spectroscopy and XPS (X-ray photoelectron spectroscopy). This Taylor-vortex based mechanical method has a great potential for the scale-up of industrial production of a low defect graphene. |
