Electrochemical incorporation of PVA-ZnO composite on Screen printed carbon electrode as dopamine sensor

In this study, a composite of zinc oxide (ZnO) nanoparticles and polyvinyl alcohol (PVA) on a screen-printed carbon electrode (SPCE), termed SPCE/PVA/ZnO electrode, was utilized to develop an enhanced electrochemical sensor for dopamine (DA) detection. A novel method for synthesizing ZnO nanoparticles using almond gum at room temperature was introduced. X-Ray Diffraction (XRD) analysis confirmed the crystallinity of the ZnO nanoparticles. The SPCE/PVA/ZnO electrode was fabricated and characterized using Field Emission Scanning Electron Microscopy (FE-SEM) and Energy Dispersive X-ray Spectroscopy (EDX). Cyclic voltammetry was employed to measure DA, revealing a linear increase in the electrochemical oxidation signal of DA at the SPCE/PVA/ZnO composite from 100 to 600 μM. The sensor demonstrated a limit of detection of 0.1208 mM and a sensitivity of 0.01822 μAμM−1cm−2. The SPCE/PVA/ZnO sensor showed acceptable performance in evaluating dopamine in real sample study. [Display omitted]