An investigation into electrochemical behavior of Rhodamine B on Fe3O4/rGO-modified GCE electrode
Abstract
Graphene oxide (GO) was synthesized by Hummers’ method before being reduced by ascorbic acid and then modified with Fe3O4. The obtained material was characterised using infrared (IR) spectroscopy and X-ray diffraction (XRD) pattern showing the characteristic peaks of rGO and Fe3O4. The rGO/Fe3O4 materials were employed as an electrode modifier on glassy carbon electrode. It was shown that the modification of GCE with rGO/Fe3O4 significantly enhanced the electro-active surface area of the electrode (SGCE = 3,1 mm2; SrGO/Fe3O4/GCE = 12,2 mm2). The electrochemical behavior of Rhodamine B on the modified electrode was investigated, illustrating that the oxidation of Rhodamine B involved 2 electrons and 1 proton in acidic solution, and 2 electrons and 2 protons in neutral and slightly basic solution.
Moraref