Novel Ni-MoO3/rGO-Modified Electrodes for Selective, Sensitive Detection of Vitamin-C and Its Supercapacitor Application

Abstract

The ubiquitous and indispensable nature of ascorbic acid, commonly known as vitamin-C, has spurred significant interest in developing precise and efficient biosensing techniques for its detection. As an essential micronutrient and potent antioxidant, the monitoring of vitamin-C levels holds importance in maintaining human health and preventing various diseases for that we have synthesis the novel Nickel doped Molybdenum Oxide (Ni-MoO₃) on reduced graphene oxide composite by hydrothermal method. This study extensively investigates the composite’s phase composition, morphology, surface area, and functional groups using various characterization techniques. The electrochemical studies exhibit the nanocomposites favorable electrochemical reversibility, low charge transfer resistance (R_ct), and enhanced double-layer capacitance (C_dl). Importantly, the Ni-MoO₃/rGO nanocomposite exhibited noteworthy electro-catalytic performance. These findings highlight the potential of synthesized composite as an efficient electro-catalyst with promising applications in energy conversion and storage technologies. The synthesized Ni-MoO₃/rGO was drop coated on a screen-printed carbon electrode (SPCE) nanocomposite electrode, which was used to measure ascorbic acid and vitamin-C tablet, a commercial tablet for its commercial usage, with a linear range of 50–400 µM and a potential range of 0.0 to 1.5 V by using two samples: ascorbic acid with LOD = 3.1268 mM, and LOQ = 5.473 mM at pH-7 phosphate buffer solution with sensitivity of 0.1739 µAµM⁻¹ cm⁻².

Graphical Abstract