Rosehip-Extract-Assisted Green Synthesis and Characterization of Reduced Graphene Oxide

Abstract

Reduced-graphene oxide (RGO) is one of the main derivatives of graphene. Chemical-based techniques are used to produce large amounts of graphene in short amount of time. Hydrazine is the strong reductant but its toxic effects limit the various applications. Therefore, the usage of plants extracts has become the research interest in recent years for produced eco-friendly materials. GO was synthesized through modified Hummer's method in this study and rosehip extracts were synthesized with successful reduction reaction in different environments. The comparison of the all analysis results from RGO samples were suggested that the rosehip extract in methanol environment is very effective in obtaining RGO. EDS and BET surface results indicated that ML-RGO and MD-RGO samples which synthesis by methanol extraction, had the highest C/O ratios (4 : 1 and 7 : 1) and surface areas (230.64 and 142.85 m(2)/g(-1)), respectively as compared to other RGO samples. The ML-RGO exhibited about a 41.14 % residual weight at 600 degrees C and had the highest thermal stability. The interlayer spacing of the diffraction peaks of MD-RGO and ML-RGO samples expanded due to a decrease of the re-stacking in graphene sheets. FESEM and HRTEM images of the MD-RGO and ML-RGO samples confirmed the flat surface with fewer layers and transparent- well exfoliated sheets. Therefore, we have validated the practicality of rosehip extract for versatile application and advocates new hopes for greener graphene.