The research on photodegradation of methylene blue dye using Bentonite-PDA-TiO2 has been done. Bentonite-PDA and TiO2 were synthesized with ratio comparison (1:1). The success of Bentonite-PDA-TiO2 synthesis were characterized using XRD, SEM-EDX, and UV-Vis DRS. The photodegradation proccess of methylene blue variables including the effect of concentration dye, contact time, and mass composite.…