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Balaji B. Mulik,Ajay V. Munde,Raviraj P. Dighole,Bhaskar R. Sathe 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.93 No.-
The electrochemical determination of semicarbazide (SCB) executed by using cobalt oxide (Co3O4)nanoparticle modified electrode which was fabricated by using simple precipitation method. The assynthesizednanoparticles have been well characterised by X-ray diffraction (XRD), Furrier transforminfra-red (FTIR), UV-visible (UV-Vis) spectroscopic techniques, energy dispersive analysis of X-ray(EDAX), BET surface area, thermogravimetric (TG) analysis and transmission electron microscopic (TEM)techniques. The XRD shows face centred cubic (FCC) structure, the FTIR demonstrated a major bandsappeared at 574 cm 1 and 669 cm 1 are suggesting the (Co-O) vibrational mode of Co3O4. The TEM ofCo3O4 NPs has been confirmed its ultra-small particle size is of2 nm 0.5 nm. Whereas, EDAX showsthe only cobalt and oxygen are available confirms Co3O4 having high BET surface area. The fabricatedCo3O4 acted as a highly sensitive electrochemical sensor for the determination of SCB by using linearSweep voltammetry (LSV), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) in0.5 M KOH solution. Significantly, anodic onset potential observed at 0.2 V vs. SCE, linear range of scanrate and concentration (1 mM–100 mM) with (LOD 0.13 and LOQ 0.46) and high current and potentialstability with pH dependent behaviour confirms Co3O4 based electrocatalytic system is good for oxidativedetermination of SCB. The selectivity of the sensor also tested by using mixture of other environmentalactive species with SCB by using LSV measurements. This proposed system is applicable in food andpharmaceutical industries for the determination of SCB as an amperometric sensor.