Fabrication of LSC@Fe3C composite sensor for efficient electrochemical monitoring of levofloxacin in aqueous environmental samples

In the present work, biomass derived graphitized carbon wrapped cementite nanoparticle composite (LSC@Fe 3 C) was prepared and employed as an electrode modify material to establish an electrochemical platform for determining levofloxacin in aqueous environmental samples. The conductive composite material was characterized X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectrum. Subsequently, an electrochemical method based on differential pulse voltammetry was optimized and applied. Based on the synergetic effect of graphitized carbon and Fe 3 C, the proposed sensor emerged good electrocatalytic activity of levofloxacin, high sensitivity, low detection limit (0.063 μM), wide linear range and excellent selectivity. The fabricated sensor was also successfully applied onto the determination of levofloxacin in real seawater samples and showed good reliability.