The reduction reaction was monitored by recording the UV–visible absorption spectra of RGO as a function of time.
GO shows a maximum absorption peak at 232 nm which was attributed to the p–p* transitions of the aromatic C–C
bonds and a weak shoulder at 300 nm due to n–p* transitions of C@O bonds. After complete reduction, a red shift of this
characteristic peak was observed at 270.9 nm for C. esculenta