A Practical Non-Enzymatic, Ultra-Sensitive Molybdenum Oxide (MoO 3 ) Electrochemical Nanosensor for Hydroquinone

Abstract

Current paper reports the fabrication of an exceptional and cost-effective electrochemical nanosensor for the ultra-sensitive determination of Hydroquinone (HQ) using MoO 3 nanostructures. The characterization through versatile analytical techniques such as Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), X-ray diffractogram (XRD), Atomic Force Microscopy (AFM) and Zeta sizer-potential (ZS-P) reveals that engineered Molybdenum oxide (MoO 3 ) nanostructures are highly crystalline in nature, phase purity homogeneity and size around 20 nm, respectively. The MoO 3 nanostructures were applied as electro nanosensor for the effective determination of HQ using Cyclic voltammetry. For efficient analysis of HQ, the bare glassy carbon electrode was modified with synthesized MoO 3 NS as sensitive sensing nanoprobe. HQ was sensitively determined at scan rate of 70 mV s −1 , borate supporting electrolyte with pH 8, and potential (V) range (−0.4 to 0.4 V vs Ag/AgCl). The linear dynamic range of Molybdenum oxide/Glassy Carbon Electrode (MoO 3 /GCE) for HQ was kept from 10–210 μ M and the limit of detection was calculated to be 0.00126 μ M respectively. The developed sensor exhibited outstanding sensing characteristics in terms of high sensitivity, exceptional electro-catalytic properties, low cost and reliable determination route for HQ in different cosmetic products.