Synthesis of Fe_3O_4 Nanocrystals and Application in Photocatalytic Degradation of Levofloxacin Lactate

摘要

Fe_3O_4 nanocrystals were synthesized with polyethylene glycol (PEG) and polyvinyl pyrrolidone (PVP) as dispersant respectively by solvothermal process. The nanocrystals were characterized in order to elucidate the morphology and structure by transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) respectively. The results indicated that Fe_3O_4 nanocrystals were cubic phases, and the morphologies of samples were globular nanoparticles structure no matter what dispersant was. The photocatalytic degradation of levofloxacin lactate (LVFX) revealed that Fe_3O_4 nanocrystals promoted the degradation of LVFX. As the UV radiation time was only 30 min, the photocatalytic degradation percentage of LVFX with Fe_3O_4 (magnetite) as catalyst was about 92%. However, the direct photolysis degradation percentage of LVFX without Fe_3O_4 is about 85%.