Multifunctional cascade nano-enzyme as well as preparation method and application thereof

The invention discloses a multifunctional cascade nano-enzyme as well as a preparation method and application thereof, and belongs to the technical field of nano-materials. The multifunctional cascade nano-enzyme is prepared by fixing cerium dioxide (CeO2) and zinc peroxide (ZnO2) in a scallop-shaped FePOs nano-enzyme material and loading a photosensitizer indocyanine green (ICG) at the same time. The multifunctional cascaded nano-enzyme can generate light and heat under the irradiation of 808nm near-infrared laser and release active oxygen, has efficient antibacterial and anti-biofilm effects, and meanwhile, can remove redundant active oxygen due to the change of the valence state of cerium ions, so that the multifunctional cascaded nano-enzyme can be used for treating infected parts and protecting normal tissues from being damaged at the same time.