Synthesis and Antibacterial Performance of γ-Fe2O3/Ag/TiO2

The photocatalyst gamma-Fe2O3/Ag/TiO2 with highly visible-light response was synthesized by two-step process. The photocatalytic antibacterial performance under visible light was evaluated by the lgReduction on the E. coli. The physical and chemical properties of gamma-Fe2O3/Ag/TiO2 were analyzed by means of X-ray powder diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), magnetic property measurement system(MPMS) and other characterization methods. The results indicate that the catalyst has mesoporous structure with a specific surface area of 89. 1 m(2)/g and its absorption boundary reaches 690 nm. The catalyst exhibited excellent visible light response, remarkable antibacterial properties and strong magnetic properties , which can be effectively separated and reused in the water treatment. The optimal preparation parameters , such as the calcination temperature , the calcination time and n (Ti)/n (Ag) were determined as 350 degrees C , 3 h and 1 : 0. 05, respectively.