Synthesis of chitosan-Fe2O3 composite has been carried out and its activity test as a photocatalyst in the photodegradation process of methylene blue with the addition of H2O2 (photofenton) has been carried out. This study aims to determine the effectiveness of the chitosan-Fe2O3 composite in the photodegradation process in the presence of H2O2 (photofenton). This process was carried out on two…