Nickel Selenide Quantum dot Reactor for Electro-oxidation of Nevirapine in Wastewater

摘要

An electrochemical sensor-based on nickel selenide quantum dot, capped with 3-mercaptopropionic acid (3-MPA), was embedded on an L-cysteine modified gold electrode for nevirapine (NVP) detection. The 3-MPA-NiSe(2)QD material was fully characterised using FTIR, SEM, Raman, HR-TEM, XRD, SAXS, PL and UV-Vis. Differential pulse voltammetry was used to study the electrochemical responses of 3-MPA-NiSe(2)QD/L-cyst/Au electrochemical sensor to NVP, with a characteristic oxidation peak at 0.76 V. The electrochemical sensor obtained a low limit of detection (LOD) value of 0.0133 pM (0.0035 ng/L), limit of quantification (LOQ) of 0.0442 pM (0.0118 ng/L) and sensitivity of 6.15 mu A/pM with a linear range of 0.25-0.63 pM, respectively. Thus, the reproducibility, stability, and repetitive usability shown by the proposed sensor made it suitable for the determination of nevirapine in real wastewater samples.