Preparation of C-Axis Oriented Bi2VO5.5 Porous Thin Films with Photocatalytic and Antibacterial Properties

C-axis oriented porous Bi2VO5.5 thin films with bismuth-layered perovskite structure have been fabricated by chemical solution decomposition and characterized by X-ray diffraction, scanning electron microscopy and UV-vis spectrophotometry. The photocatalytic activity of Bi2VO5.5 thin films has been evaluated by photodegrading methylene blue solution, and the optimum processing parameters for the photocatalytic activity have been studied. The porous Bi2VO5.5 thin film was tested for the recyclability up to five times in the same photocatalytic reaction and the results reflected the good stability of the Bi2VO5.5 thin films. Furthermore, the porous Bi2VO5.5 thin film also displayed visible light photocatalytic activity for the destruction of Staphylococcus aureus, and inactivation efficiency was more than 90% after being irradiated by visible light for 24 hours. The morphology of dead Staphylococcus aureus was recorded by scanning electron microscopy photos, and the sterilization process was demonstrated.