부산대학교 도서관

Graphene is generally converted from graphite using chemicals at high temperatures. This study offers a new solution to produce it, using charcoal powder as the basis material, and equipment that is cheaper and environmentally friendly because it does not use chemicals. This study aimed to determine the effect of arc discharge plasma duration on coconut-shell charcoal (CS) as the basis material for producing graphene nanosheets (GNs). In this study, we successfully producing few-layer wrinkled graphene (FLwG) by employing plasma arc discharge to burn charcoal made from coconut shells (C.S). The arc discharge was generated by a half bridge inverter, a fly-back transformer and the electrodes. The electrodes were arranged with a ground electrode composed of aluminium and a graphite rod was installed as a high voltage electrode. In an air gap of 1.0 cm between the ground and the high-voltage electrodes, a bulk of charcoal powder was placed on the surface ground electrode. The plasma of arc discharge emitted brightly and enough to burn C.S charcoal. Potential graphene was analyzed by Raman spectroscopy and transmission electron microscopy (TEM). It is demonstrated that a FLwG is converted according to Raman spectroscopy investigation. The presence of FLwG with a folded and wrinkled structure is also confirmed by TEM investigation. [ABSTRACT FROM AUTHOR]