Construction of Magnetic Fe–Mn Oxide/Carbon-Cloth Fiber and Its Photocatalytic Oxidation for Sulfanilamide and Tetracycline¹

Abstract—Magnetic Fe–Mn oxide doped carbon-cloth fiber (FeMn₂O₄/CCFs) hybrid was designed and prepared through one-pot hydrothermal method with calcination treatment. The structure and morphology of FeMn₂O₄/CCFs hybrid was characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), UV–Vis diffuse reflectance spectra (DRS). Its photocatalytic oxidation performance was investigated by degradation of representative antibiotics pollutant models (sulfanilamide and tetracycline) under visible light irradiation (λ > 420 nm). The fluorescence intensity was probed through photoluminescence spectra to inspect the generated hydroxide radical during the photocatalytic reaction. Then the photocatalytic mechanism was deduced according to the experimental results. Due to its benign magnetic recyclability, FeMn₂O₄/CCFs can be easily reused. This work provided a new path for green treatment of antibiotic contaminants in the environmental pharmaceutical wastewater.