Electrochemical Detection of Ascorbic Acid Using Fe-Mn-SO4-2-/Zro2(FMSZ) Modified Glassy Carbon Electrode
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Ascorbic Acid (FMSZ) Nanocomposite, Modified GC Electrode, Cyclic Voltammetry
Abstract
A new ferric–manganese doped sulfated zirconia nanoparticle solid acid catalyst was prepared through the impregnation reaction followed by calcination at 600 oC for 3h and characterized by XRD, BET, EDS and TEM tools. The prepared electrode has been employed as a very sensitive electrochemical sensor through modification of a glassy carbon electrode (GCE) with Fe-Mn- SO42-/ZrO2 (FMSZ). The electrochemical behavior of ascorbic acid was studied by FMSZ/GC using cyclic voltammetry techniques. A well-defined oxidation peak was observed in a 0.1 M KH₂PO₄ electrolyte solution by solid-phase voltammetry. Under the CV techniques, it appears that the catalytic effect of the modification of FMSZ/GCE shows a higher current response as compared to bare GCE. Peak potential was observed to shift slightly to a less positive value by about 220 mV, and current was significantly enhanced by about 2.2-fold.
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