▎ 摘　　要

The current effort benefited from a simple hydrothermal production protocol to fabricate a nanocomposite using graphene oxide nanosheets anchored with manganese dioxide nanorods (MnO2 NRs-GO) that was applied to construct a sensitive electrochemical catechol sensing system. As-produced nanocomposite was characterized by Field emission-scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and Fourier transformed-infrared spectroscopy (FT-IR), which was then drop-casted on glassy carbon electrode (MnO2 NRs-GO/GCE) for sensor application. The MnO2 NRs-GO/GCE showed remarkable electrocatalytic capacity for the redox reaction of catechol, with minimized redox overpotentials and boosted voltammetric peak currents. As-fabricated sensor displayed an admirable electrocatalytic behavior to catechol, with a narrow limit of detection (0.02 mu M), a broad linear range (0.5-400.0 mu M) and an impressive sensitivity (0.0503 mu A/mu M). The MnO2 NRs-GO/GCE was also successful in sensing catechol in real specimens, with appreciable recovery rates.