Analisis Morfologi, Kristalinitas, dan Daya Hantar Listrik Grafena Berlapis Nano dari Tempurung Kelapa (Cocos Nucifera L.) dengan Metode Pirolisis

Abstract

Research on the morphology, crystallinity, and electrical conductivity analysis of coconut shell (Cocos nucifera L.) graphene nano sheet using pyrolysis method was conducted. The purpose of this study was to analyze the effect of temperature and time of the second pyrolysis on the quality of GNS produced. This research is a laboratory experimental and descriptive research. Graphene nano sheet was synthesized using the pyrolysis method by varying the temperature and time of the second pyrolysis (P2). Then, GNS produced from each variation is characterized by XRD, SEM-EDX, FTIR and multimeter. The results showed quite sharp and slightly broadened peaks at 2θ = 23.8o and 44.5o from the variations of T2 = 500 ℃ and t2 = 2 hours. The results of XRD analysis are also well synchronized by the results of SEM-EDX analysis where the variation shows the highest percentage of carbon with morphology similar to honeycomb and hexagonal structure. Both data are further clarified by the results of FTIR analysis, which shows the presence of typical functional groups of graphene in the form of C=C (aromatic) in the 1500 - 1675 cm-1 absorption region with medium weak intensity. The electrical conductivity data also show that the obtained GNS is capable of conducting electric current. Overall, the results of this study indicate that pyrolysis temperature and time greatly affect the GNS produced and the GNS obtained shows good characteristics indicated by its ability to conduct electric current and as an energy storage.