Synthesis, characterization, and electrocatalytic ability of γ-Fe2O3 nanoparticles for sensing acetaminophen

Singh, Beer Pal; Kumar, Arun ; Areizaga-Martinez, Hector I; Vega-Olivencia, Carmen A; Tomar, Maharaj S

Abstract

Maghemite (γ-Fe2O3) nanoparticles have been synthesized using co-precipitation method followed by chemically induced transition process. As prepared nanoparticles have been analyzed by X-ray diffraction, Raman and FTIR spectroscopies which reveal the γ-Fe2O3 phase. These γ-Fe2O3 nanoparticles have been used to modify the glassy carbon electrode (GCE) to form nano γ-Fe2O3 modified GC electrode for electrochemical sensing of acetaminophen (C6H9NO2) using potential controlled cyclic voltammetric (CV) technique. The obtained modified electrode shows an excellent electrocatalytic ability to sense acetaminophen in 0.1 M KCl supporting electrolyte. In addition, a significant enhancement in anodic peak current has been observed using nano γ-Fe2O3 modified GC electrode than the bare electrode. The CV plots reveal that redox peaks have been linearly co-related to the acetaminophen concentration in the range of 0.031 mM to 1 mM with sensitivity ~30.78 µA/mM.

Keyword(s)

γ-Fe2O3; Modified GC electrode; Electrochemical sensing; CV; Acetaminophen

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