Manganese oxide is an effective strong oxidizer because it has oxygen that is easily released. Manganese oxides have hollow and layered structures such as MnO2, Mn3O4, Mn2O3, MnO. Manganese oxide synthesis can be done by sol-gel, reflux, hydrothermal, ceramic, and precipitation methods. Manganese oxide can be used as a catalyst to degrade waste organic compounds such as methylene blue dye. Cryp…