Highly Efficient Electrocatalytic Active Delafossite CuAlO₂/Al₂O₃ Microspheres towards Detection of Furaltadone Antibiotic Drug in Real Samples

Abstract

In this study, CuAlO 2 /Al 2 O 3 (CAOCM) micro-sphere was prepared by sol-gel techniques, which was further annealed under N 2 -atmosphere. The microsphere composite materials physio-chemical properties were studied using various analytical techniques. The surface morphology of prepared materials was observed from the FESEM with spherical structure. The surface area and the surface morphology were explored from BET analysis techniques. In this research, we studied a CAOCM microspheres decorated screen printed carbon electrode (SPCE) utilized to detect the furaltadone (FLT). The electrochemical active surface area has been determined using the ferric cyanide system and Randles-Sevick equations. The CuAlO 2 /Al 2 O 3 microspheres electrochemical ability was analyzed by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) towards the detection of FLT. These CAOCM microspheres decorated electrodes exhibited excellent electrocatalytic ability with a limit of detection (LOD) and sensitivity is 20 nM and 12.7845 μ A μ M −1 cm −2 , respectively. Moreover, the CAOCM microspheres/SPCE electrodes exhibit excellent stability, repeatability, reproducibility, and higher sensitivity. The decorated sensor electrode real-time applications were successfully studied to analyze FLT in the river and pond water with excellent recovery results of 97.4 and 98.4%.