Sr-doped NiO3 nanorods synthesized by simple sonochemical method as excellent materials for voltammetric determination of quercetin†
The simple and novel surfactant-free synthesis of flower-like strontium doped nickel oxide nanorods (SNO NRs) via simple co-precipitation method was used for electrochemical sensing of quercetin (QCT). The structure and morphology of as-synthesized flower-like SNO NRs were characterized by using various spectroscopic techniques. Then, CV, EIS, and DPV were used to examine its electrochemical properties. The effective loading concentration, pH, scan rate and stability of the SNO NRs modified electrode were studied. Under optimized condition, the electrochemical detection of QCT demonstrated a low detection potential of 0.3 V (vs. Ag/AgCl), and achieved a higher oxidation peak current compared to other modified electrodes in PB (pH 5.0). The voltammetric current response was found to linearly increase with increasing concentration range from 0.0168.53 µM, along with a low detection limit of 1.98 nM, and high sensitivity of 2.1055 µA mM cm-2. The sensor also shows good selectivity and satisfactory recovery for real sample (apple and grape juice) analysis.