Eco-friendly synthesis of reduced graphene oxide from agricultural waste for electrodes in capacitive deionization applications

Abstract

Abstract In this study, reduced graphene oxide (rGO) was synthesized from sugarcane bagasse (SB) through dehydration of SB by concentrated H 2 SO 4 , graphene oxide (GO) formation by modified Hummers’ method and reduction by anthocyanin in pomegranate juice. It was found that rGO that underwent reduction reaction for 24 hours has highest carbon/oxygen ratio from elemental composition from X-ray photoelectron spectroscopy (XPS), suggesting the highest degree of reduction among all reduction time. The formation of rGO was confirmed by UV-visible absorption spectrum, XPS, Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy.