▎ 摘　　要

The oxidation process of graphite results inhomogeneity in graphene oxide (GO) structure which adversely affects its usage in industrial applications. In this study, principal component analysis and Taguchi optimization was performed to understand and improve homogeneity of GO powder obtained using Hummers methodology. The results show that it has been possible to achieve RGO having 37.6% less variability than sodium borohydride with the same amount ascorbic acid usage. Thus, using environmentally safe ascorbic acid can also be used as the reducing agent without any compromise on product quality. The improvement rate between the estimate and the optimal conditions were calculated for the standard deviation of ID-to-IG of GO and rGO ratio as 427% and 115%, respectively. In the FTIR characterization of graphene oxide, the dominant functional groups are found to be hydroxyl groups (OH-1), ketonic groups (CO2) and carboxylic/carbonyl groups (C=O).