Synthesis and characterization of barium ferrite coated with titanium dioxide as high efficient magnetic photocatalyst

Abstract

The magnetic photocatalyst consisting of barium ferrite, silica and titania with core-shell structure, was synthesized via layer-by-layer based sol-gel technique. In this work, barium ferrite was used as magnetic core for surface modification by coating with silica, polyacrylic acid and titanium dioxide, respectively. The surface modified barium ferrite was then calcined at 500^oC for 2 hours to obtain the anatase phase of titania shell. The obtained product was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscope (FT-IR), Scanning electron microscope (SEM) and Vibrating sample magnetometer (VSM). The results confirmed that magnetic photocatalyst was successfully prepared. In addition, photocatalytic activities were studied on the degradation of potassium iodide and edicol tartrazine. The used magnetic photocatalyst could be recovered by applying the magnet. In addition, the results showed that the magnetic photocatalyst can be recycled for using as a photocatalyst at least 3 times