Effect of Fe2+/Fe3+ ratio on photocatalytic activities of Zn1-xFexO nanoparticles fabricated by the auto combustion method |
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| Affiliation: | 1. CAS Key Laboratory of Green Process and Engineering, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;2. China Energy Conservation and Environmental Protection Group, Beijing 100082, China;3. ZhongkeLangfang Institute of Process Engineering, Fenghua Road No 1, Langfang Economic & Technical Development Zone, Hebei Province, China;1. KU Leuven Department of Materials Engineering, Kasteelpark Arenberg 44, Leuven, 3001, Belgium;2. Mulliken Center for Theoretical Chemistry, University of Bonn, Beringstr. 4+6, Bonn, D-53115, Germany;3. General Chemistry (ALGC – Materials Modeling Group), Vrije Universiteit Brussel (Free University Brussels, VUB), Pleinlaan 2, Brussels, 1050, Belgium;1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, P.R. China;2. School of Chemical Engineering, The University of Queensland, St Lucia, QLD 4072, Australia |
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| Abstract: | Zn1-xFexO nanoparticles with Fe doping content from 0 % to 6 % were fabricated by a facile auto combustion method. SEM, XRD, PL and XPS were carried out to characterize the morphologies, structures, optical properties and surface chemical states of the samples. The photocatalytic properties were also investigated toward Methyl Orange (MO) degradation. It was found that the maximum photocatalytic activity was obtained by 4 % Fe-doped ZnO nanoparticles, which was ascribed to the highest ratio of Fe2+/Fe3+. The experimental results and DFT calculations indicated that Fe could effectively affect the photocatalytic activity of ZnO nanoparticles, dependent on Fe2+/Fe3+ ratio and doping contents. Furthermore, a conceivable mechanism of band gap structure and carrier transfer of Fe2+/Fe3+ co-existed Zn1-xFexO was proposed according to experimental analyses and theory calculations. |
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| Keywords: | Fe-doped ZnO Auto combustion method Photocatalytic performance DFT calculations |
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