Research on the synthesis of Fe3O4-PDA-TiO2 and its application in the photodegradation of methylene blue dye have been successfully carried out. The synthesized materials were characterized using XRD, UV-DRS, SEM-EDS and VSM. The results of the XRD characterization showed that the highest intensity value was located at 2θ with a value of 25.36º and a crystal size of 26.83 nm was obtained. Th…