This paper aims to synthesis and characterization of SrFeO3/TiO2 nanocomposite with enhanced visible-light activity. At first, SrFeO3 nanoparticles were successfully synthesized by the thermal treatment method, and then Titania nanoparticles were prepared by hydrolysis precipitation process. Composite nanoparticles were synthesized at different ratios of Titania to Ferrite. To characterize the nanocomposites’ structure, scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Brunauer Emmett Teller were applied. Furthermore. The UV–Vis diffuse reflectance spectra showed the red shift in the absorption spectra of the nanocomposites were significantly related to the ratio of Titania to Ferrite. Moreover, the photocatalytic activity of the nanocomposites was assessed under visible-light, considering Congo red dye degradation. By the ratio of the component of 1:0.5, the photocatalytic degradation efficiency reached 82% after 30 min of irradiation. PL spectroscopy was applied as a practical technique to examine the separation efficiency of the photogenerated carrier pairs in TiO2, SrFeO3, SrFeO3/TiO2 (1:0.5). The accordance between PL and photocatalytic results, showed vital role of the constructed heterojunction in the nanocomposites to prevent the charge carrier recombination. Also, the synthesized SrFeO3/TiO2 (1:0.5) nanocomposite showed a suitable reusability in the model pollutant treatment.
