Research entitled Fe3O4-TiO2 and its application to the photodegradation of methylene blue dye had been investigated. Fe3O4-TiO2 composites had been prepared with mass ratios (1:1), (1:2) and (2:1) and were characterized using XRD, SEM-EDS and UV-Vis DRS instruments. The photodegradation process of methylene blue had been carried out in several variables including the effect of the initial conc…