Facile Green Synthesis of NiO/NiCo<sub>2</sub>O<sub>4</sub> Nanocomposite as an Efficient Electrochemical Platform for Determination of Dopamine
Mahnaz Amiri, Hamid Akbari Javar, Hadi Mahmoudi‐Moghaddam
Abstract
Abstract The synthesis of NiO/NiCo 2 O 4 nanoparticles by an eco‐friendly, fast, simple and cost‐effective approach employing Urtica extract is reported in this study. The NiO/NiCo 2 O 4 nanocomposite were characterized using VSM, FTIR, XRD, and SEM techniques. Moreover, to construct a modified carbon paste electrode, NiO/NiCo 2 O 4 were employed and this sensor was used for dopamine (DA) detection. Using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques, the electrochemical behavior of dopamine at the NiO/NiCo 2 O 4 /CPE was investigated. Analysis of dopamine, with a limit of detection (LOD) equal to 0.04 μM, in the concentration range of 0.1–100.0 μM, was facilitated by NiO/NiCo 2 O 4 /CPE. Moreover, the satisfactory selectivity for DA determination in the presence of uric acid (UA) and ascorbic acid (AA), was obtained. The suggested new sensor displayed a good reproducibility, sensitivity, and stability for determination of DA in drug and biological samples.