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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
(a) XPS survey spectra of MnO2 and MnO2@ZHS binary hybrid, (b) the high-resolution Zn 2p3, and (c) Sn 3d5 spectra of MnO2@ZHS binary hybrid, (d) O1s spectra of MnO2 and MnO2@ZHS binary hybrid, the deconvoluted O1s spectra of (e) MnO2 and (f) MnO2@ZHS binary hybrid.