Levofloxacin Degradation Under Visible-Led Photo-Catalyzing by a Novel Ternary Fe-Zno/Wo3 Nanocomposite

As semiconductor photocatalysts showing their efficient redox ability upon illumination, new development of materials to enhance the pollution degradation is gaining popularity, especially on their oxidation ability. In this study, a highly stable ternary Fe-ZnO/WO 3 nanocomposite photocatalyst has been synthesized in order to improve charge transfer of photocatalytic oxidation under 30W LED light (425~470 nm) to efficiency degrade the Levofloxacin (LVF) in the solution. This catalyst was characterized and analyzed by XRD, FE-SEM, HR-TEM, X-ray XPS, and UPS. Various important factors for the photodegradation were investigated, including Fe content, initial LVF concentration, and catalyst dosage. The optimal conditions were Fe 1.0 wt.%, LVF 10 mg L -1 , and Fe-ZnO/WO 3 dosage 0.5 g L -1 for LVF photodegradation up to 96% with a kinetic rate constant of 0.0342 min -1 and were stable in photodegradation efficiency (90%) after five test cycles. In the visible LED light, the activation bandgap was estimated to be 2.75 eV with high electron-hole pair separation and charge transfer from Fe-ZnO to WO 3 that could enhance the generation of active species of • OH. This study demonstrated that the synthesized Fe-ZnO/WO 3 could serve as a reliable visible-light responsive photocatalysts with the potential for degrading antibiotics in solution