INFLUENCE OF INORGANIC IONS AND pH ON THE PHOTODEGRADATION OF CIPROFLOXACIN WITH ZnO PHOTOCATALYST BASED ON THE MAGNETIC ZnFe2O4

摘要

CIP (ciprofloxacin), as one kind of quinolones, has a potential hazard to the ecosystem and human health. In this study, zinc oxide (ZnO) photocatalyst based on magnetic ZnFe2O4 was synthesized via hydrothermal and sol-gel methods. The as-prepared photocatalyst was extensively characterized by scanning electron microscope (SEM), Xray diffraction (XRD), X-ray energy diffraction spectrum, transmission electron microscope (TEM), vibrating sample magnetometer (VSM), UV-vis diffuse reflectance spectra (UV-vis DRS), X-ray photoelectron spectroscopy (XPS), Brunauer, Emmett and Teller (BET) surface area analysis. This photocatalyst of ZnO/ZnFe2O4 was proved to exhibit high photocatalytic efficiency and the photodegradation rate could reach 70.86% for the degradation of CIP under ultraviolet irradiation. In addition, the influence of pH and inorganic salts on photocatalytic activity was also investigated. The results showed that different pH and the presence of inorganic salts both had a great impact on the photodegradation of CIP.