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. 2022 Jun 18;20:404–417. doi: 10.1016/j.bioactmat.2022.06.005

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© 2022 The Authors

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 1 — Characterization of Mn-ZnO₂ NPs. (a) The crystal structure of Mn-ZnO₂ NPs. (b) Representative TEM images of ZnO₂ NPs. (c) Representative TEM images of Mn-ZnO₂ NPs. (d) STEM-HAADF image and the corresponding EDS elemental mapping of Zn, Mn, and O in Mn–ZnO₂ NPs. (e) N2 adsorption/desorption isotherm and the corresponding pore-size distribution (inset) of Mn-ZnO₂ NPs. (f–i) XPS spectra of the as-prepared Mn-ZnO₂ NPs: survey spectra (f), and high-resolution of Zn 2p (g), Mn 2p (h), and O 1s (i).