The research on photodegradation of Remazol Red RB using ZnO-Al2O3 photocatalyst has been done. This study aims to determine the ratio of the optimum weight of Al to ZnO needed to degrade Remazol Red RB. The photodegradation process of Remazol Red RB was carried out in several variables including the effect of contact time and the initial concentration of the dye under conditions below pHpzc. C…