2026-04-18T03:14:33Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1691582025-12-04T20:57:51Zcom_2072_1057col_2072_478796col_2072_478917

Mechanism and stability of an Fe-based 2D MOF during the photoelectro-Fenton treatment of organic micropollutants under UVA and visible light irradiation Ye, Zhihong Schukraft, Giulia E.M. L'Hermitte, Anouk Xiong, Ying Brillas, Enric Petit, Camille Sirés Sadornil, Ignacio Depuració d'aigües residuals Oxidació electroquímica Depuració de l'aigua Purification of sewage Electrolytic oxidation Water purification This work reports the novel application of an Fe-based 2D metal−organic framework (MOF), prepared with 2,2'-bipyridine-5,5'-dicarboxylate (bpydc) as organic linker, as highly active catalyst for heterogeneous photoelectro-Fenton (PEF) treatment of the lipid regulator bezafibrate in a model matrix and urban wastewater. Well-dispersed 2D structures were successfully synthesized and their morphological, physicochemical and photocatalytic properties were assessed. UV/Vis PEF using an IrO2/air-diffusion cell with an extremely low catalyst concentration (0.05 g L-1, tenfold lower than reported 3D MOFs) outperformed electro-oxidation with electrogenerated H2O2, electro-Fenton and visible-light PEF. Its excellent performance was explained by: (i) the enhanced mass transport of H2O2 (and organic molecules) at the 2D structure, providing active sites for heterogeneous Fenton's reaction and in-situ Fe(II) regeneration; (ii) the ability of photoinduced electrons to reduce H2O2 to ¿OH, and Fe(III) to Fe(II); and (iii) the enhanced charge transfer and excitation of Fe−O clusters, which increased the number of electron-hole pairs. LC-QToF-MS and GC-MS allowed the identification of 16 aromatic products of bezafibrate. The complete removal of four micropollutants mixed in urban wastewater at pH 7.4 revealed the great potential of (Fe−bpydc)-catalyzed PEF process. 2020-07-20T09:51:45Z 2020-07-10 2020-07-20T09:51:45Z info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 0043-1354 https://hdl.handle.net/2445/169158 702755 eng Versió postprint del document publicat a: https://doi.org/10.1016/j.watres.2020.115986 Water Research, 2020, vol. 184, num. 115986 https://doi.org/10.1016/j.watres.2020.115986 cc-by-nc-nd (c) Elsevier Ltd, 2020 http://creativecommons.org/licenses/by-nc-nd/3.0/es info:eu-repo/semantics/openAccess 40 p. application/pdf Elsevier Ltd Articles publicats en revistes (Ciència dels Materials i Química Física)