DOI: https://doi.org/10.55373/mjchem.v27i5.174

Keywords: Graphene oxide; waste; tire; carbon black; reaction time

Abstract

Graphene oxide (GO) has been widely utilised in diverse applications due to its unique properties and versatile functionalisation capabilities. Maintaining the optimal synthesis parameters is crucial to producing high-quality GO with high oxidation. This study focuses on the effect of different reaction times during the modified Hummers method synthesis on the structural and morphological properties of GO derived from regenerated carbon black (CB) of waste tire. Using reaction times of 60, 120, and 180 minutes, the resulting GO samples were systematically examined through various characterisation techniques. FTIR spectroscopy confirmed the increased intensity of O-H bond vibrations, correlating with longer reaction times. XRD analysis revealed that increasing reaction times resulted in broader and more amorphous peaks, indicative of greater intercalation of oxygen-containing groups. Notably, as the reaction time increases, the oxygen content in the GO also increases, as evidenced by the intensified EDX peaks. Our findings demonstrate that the reaction time significantly influences the degree of oxidation and the distribution of functional groups in GO. This research provides valuable insights into the synthesis of GO from sustainable sources, promoting cost-effective and environmentally friendly approaches to advance material production.