A strategy of silver Ferrite/Bismuth ferrite nano-hybrids synthesis for synergetic white-light photocatalysis, antibacterial systems and peroxidase-like activity

In this paper, the Silver Ferrite/Bismuth ferrite (AgFe2O4/BiFeO3) nanocomposites were fabricated via hydrothermal method. Scanning electron analysis, X-ray diffraction, UV–vis/Kubelka-Munk instrument, specific surface area analysis, and X-ray photoelectron method were utilized to characterize the structural of the prepared nanomaterials. X-ray diffraction shows the cubic and rhombohedral crystal status for composites. The surface area of AgFe2O4/BiFeO3 was 52.41 m2/g. White-light activity of composites was observed due to the bandgap about 1.93 eV. The photocatalytic activity of composites was experimented by using methylene blue dye under visible light irradiation. The dye was completely degraded in 120 min. After fifth cycles, the photocatalysis response was almost constant. The antibacterial study shows that the AgFe2O4/BiFeO3 exposure to Helicobacter pylori and Bacillus cereus with great growth inhibition. The AgFe2O4/BiFeO3 with aptamers was used to detection of Escherichia coli by using the peroxidase activity. The detection limit of Escherichia coli by using Aptamer/AgFe2O4/BiFeO3 as biosensor was about 59 CFU/mL.