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. 2016 Sep 7;6:32711. doi: 10.1038/srep32711

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Copyright © 2016, The Author(s)

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(a) UV−vis diffuse reflectance spectra (DRS) of undoped and Mn²⁺-doped ZnO fibers. The inset shows the corresponding plots of (αhν)2 versus photon energy (hν). (b) UV-vis absorption spectra of RhB at different time in the presence of 15% Mn²⁺-doped ZnO nanofibers under visible light. The inset illustrates the SEM image of the specimen reclaimed after photocatalytic measurement. (c) Photodegradation of RhB by ZnO nanofibers doped with different Mn²⁺ concentration. (d) Cycling tests of photodegradation of the specimen. (e) Degradation rate constants and apparent quantum efficiencies of ZnO nanofibers with different doping concentrations.