Fig. 1.

Synthesis and characterization of CeO₂–MnO₂. A Diagrams for synthetic process of CeO₂–MnO₂. B TEM images of CeO₂. Scale bar = 50 nm. C TEM images of MnO₂. Scale bar = 500 nm. D TEM images of CeO₂–MnO₂. Scale bar = 25 nm. E EDS element mapping images of CeO₂–MnO₂. Scale bar = 25 nm. F XRD analysis of CeO₂, MnO₂ and CeO₂–MnO₂. G The average zeta of CeO₂, MnO₂ and CeO₂–MnO₂. H The UV spectra of CeO₂, MnO₂ and CeO₂–MnO₂ with different concentrations. I The Raman diagram of CeO₂, MnO₂ and CeO₂–MnO₂