Construction of pdru nanoparticles decorated reduced graphene oxide composite for electrochemical sensing of enrofloxacin

In this study, a new electrochemical sensor depending on bimetallic nanoparticles palladium (Pd) and ruthenium (Ru) coated on the surface reduced graphene oxide glass carbon electrode (Pd@Ru/rGO/GCE), examined by surface analysis morphology SEM and EDX was constructed. The results displayed that the obtained Pd@Ru/rGO nanoparticles have a uniform, compact morphology and were homogeneously distributed on the surface of rGO. The x-ray diffraction (XRD) and photoelectron spectroscopic (XPS) analyses were used to detect Pd and Ru. The data showed that the depositions of bimetallic nanoparticles on the surface rGO were successful. Pd@Ru/rGO/GCE was used for the detection of enrofloxacin; electrochemical sensitivity was 0.0291 µA µM-1, and the linear range was estimated to be between 0.6 and 116 µM with a detection limit of 0.2 µM to detect enrofloxacin, indicating excellent performance and a low detection limit. Experimental results show that prepared Pd@Ru/rGO/GCE exhibited excellent reproducibility and repeatability electrode, as well as high-stability Pd@Ru/rGO/GCE.