Abstract
Fe-ZnO was synthesized via impregnation and applied to photocatalytic degradation of 2,4-dichlorophenol (2,4-DCP) under visible light. Conditions of Fe-ZnO synthesis which included a Fe content and a calcination temperature were focused. From UV-DRS, visible light absorption of Fe-ZnO samples increased with increasing of Fe content and calcination temperature. TEM images revealed Fe species (FeO, Fe3O4, and Fe2O3) on ZnO as a function of calcination temperature. XANES analysis confirmed the majority of Fe3+ content. Response surface methodology (RSM) dominating over experimental design and statistical analysis for 2,4-DCP photocatalytic degradation indicated that the high degradation efficiency was associated with calcination temperature of 680–700 °C, Fe content of 4.5–5.0 mol%, and catalyst loading of 1.2–1.8 g L−1. Moreover, addition of 2mM of K2S2O8 in a 5.0Fe-ZnO@700 °C system could enhance the degradation efficiency to a completion within 90 min. The kinetics of 2,4-DCP photocatalytic degradation well fit the Langmuir-Hinshelwood model.
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Kiattisaksiri, P., Khamdahsag, P., Khemthong, P. et al. Photocatalytic degradation of 2,4-dichlorophenol over Fe-ZnO catalyst under visible light. Korean J. Chem. Eng. 32, 1578–1585 (2015). https://doi.org/10.1007/s11814-014-0379-6
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DOI: https://doi.org/10.1007/s11814-014-0379-6