A High Performance Electrochemical Sensor for Sulfite Based on MOWS₂ Nanocomposite Modified Electrode

The present study reports synthesis of MOWS2 nanocomposite followed by its characterization using energy dispersive X-ray spectroscopy (EDS), X-Ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). Chronoamperometry (CHA), differential pulse voltammetry (DPV), and cyclic voltammetry (CV) have been used to examine electro-chemical behaviors of sulfite on MOWS2 nanocomposite modified SPE. Electro-chemical specification indicated very good electro-catalytic activities and surface area impact of MOWS2 nanocomposite. Oxidation signals of sulfite on MOWS2/SPE has been considerably increased in comparison to the bare SPE. Within optimum conditions, quantification of sulfite might range between 0.08 to 700.0 µM with a small determination limit of 0.02 µM based on S/N=3.The impact of scan rates has been explored. Finally, the MOWS2/SPE has been employed for detection of sulfite in real specimens. In general, an easy experimental method for manufacturing MOWS2 nanocomposite has been suggested that takes advantage of selectivity, reproducibility, and sensitivity toward electro-active specimens, as well as biological matrices.