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A facile synthesis of carbon-coated nanoflowers C@NiCo2O4 by using the simple hydrothermal method and nitrogen-rich melamine as a carbon source for electrochemical detection of sulfite. As synthesized materials were analyzed by using the physiochemical methods such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and EDAX mapping conforms the crystal structural, the presence of chemical species, functional groups, flower like morphology and quantity of specific elements of C@NiCo2O4 respectively. Among the all the prepared sample C@NiCo2O4-3 are reveals greater electrocatalytic activity by earlier oxidation of sulfite at 0.42 V in cyclic voltammetry studies. Amperometry depicts that the good sensitivity (3.57 μA mM -1 cm -2 ), low limit of detection (0.05 μM) and linear range (0.3 to 724 μM) of C@NiCo2O4-3 due to boosted electrical conductivity by synergetic effect (between coated carbon and NiCo2O4) and enlargement of surface area. Six time repeatability of single modified GCE of pristine and C@NiCo2O4-3 CV curve shows oxidation peak current with RSD of 43% and 4% respectively, stable operation of C@NiCo2O4-3 is owing to chemical inertness of carbon. Real-time detection of sulfite in red wine and tape water guarantee the commercialization of electrochemical sulfite sensor.

Hydrothermal Synthesis of Carbon Coated NiCo2O4 Nano flower for the Electrochemical Oxidation of Sulfite in Real Sample