Mixed metal oxide nanocomposites for enhanced electrochemical detection of nitrite in food products
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Date
2025
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Abstract
Mixed metal oxide nanocomposites comprising Manganese, Copper, and Vanadium oxides (Mn/Cu/V
2
synthesized via a modified hydrothermal technique. Synthesized nanocomposites (Mn/Cu/V
O
5
) were
NCs) were
characterized using FT-IR, FE-SEM with EDAX, TGA, X-ray diffraction, and UV–vis spectroscopic techniques. For
the electrochemical detection of nitrite in food samples, a working electrode was specifically designed and
constructed utilizing ternary NCs of Mn/Cu/V
2
O
2
O
5
.
5
The electrochemical behavior of the fabricated working
electrode towards sensing nitrite ion was investigated using voltammetric methods such as Cyclic Voltammetry
(CV), Differential Pulse Voltammetry (DPV), and Linear Sweep Voltammetry (LSV). The electrochemical
impedance spectroscopic approach was employed for the structural study of interface created at the interface of
working electrode and the analyte. The impact of scan rate and electrolytic pH on the electro-oxidation behavior
was examined. The novel working electrode achieved a very low detection capability of 0.01 µM in a detection
range of 0–300 µM. The fabricated electrochemical food sensor shows high sensitivity for sensing nitrite in both
reference and real food samples. This study offers valuable insights into the fabrication of cost-effective and
reliable sensors for detecting additives, colorants, and preservatives in food samples