Quantitative Detection of Ortho-Aminophenol by Using Modified Reduced Graphene Oxide/Indium Tin Oxide Glass Electrode.

In this research work the electrochemical oxidation of ortho-aminophenol (oAP) is studied using modified reduced graphene oxide/indium tin oxide (rGO/ITO) glass electrode in acetonitrile medium, tetrabutyl ammonium perchlorate (TBAP) supporting electrolyte. Cyclic voltammetry (CV) and linear-sweep voltammetry (LSV) techniques were used to study the redox behavior of oAP. The graphene oxide-initiated auto-oxidized 2-aminophenoxazine-3-one is irreversibly reduced by modified rGO/ITO glass electrode at −0.048 V (versus Ag–AgCl electrode). LSV response shows that the cathodic peak current increases notably compared to that of bare rGO/ITO glass electrode and with the increasing concentration of oAP. The oxidized product of oAP was characterized by UV–Visible and FT-IR spectroscopy. The redox behavior of oAP of modified rGO/ITO glass electrode was compared with the electrochemical behavior of oAP at bare glassy carbon electrode. Reduced graphene oxide (rGO) modified ITO glass electrode in acetonitrile medium was used to electrochemically oxidize ortho-aminophenol (OAP). The results of modified rGO/ITO glass electrode were also compared with the bare glassy carbon electrode. Linear sweep voltammetry results showed an increase in cathodic current for rGO/ITO glass electrode compared to bare glassy carbon electrode. [ABSTRACT FROM AUTHOR]