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Title: | Ultra-uniform MIL-88B(Fe)/Fe3S4 hybrids engineered by partial sulfidation to boost catalysis in electro-Fenton treatment of micropollutants: Experimental and mechanistic insights |
Author: | Ye, Zhihong Zhang, Wenfeng Lanzalaco, Sonia Zhao, Lele Sirés Sadornil, Ignacio Xia, Pan Zhai, Jun He, Qiang |
Keywords: | Òxid de ferro Catàlisi Depuració de l'aigua Ferric oxide Catalysis Water purification |
Issue Date: | 2-Dec-2022 |
Publisher: | Elsevier B.V. |
Abstract: | Fe-based metal-organic frameworks are promising catalysts for water treatment, although their viability is hampered by the slow regeneration of active Fe(II) sites. A facile sulfidation strategy is proposed to boost the catalytic activity of MIL-88B(Fe) in heterogeneous electro-Fenton (HEF) treatment of organic micropollutants at mild pH. The synthesized MIL-88B(Fe)/Fe3S4 hybrids possessed numerous and durable unsaturated iron sites, acting the S2- atoms as electron donors that enhanced the Fe(II) recycling. The sulfidated catalyst outperformed the MIL-88B(Fe), as evidenced by the 7-fold faster degradation of antibiotic trimethoprim by HEF and the fast destruction of micropollutants in urban wastewater. The hybrid catalyst was reused, obtaining >90% drug removal after four runs and, additionally, its inherent magnetism facilitated the post-treatment recovery. Electrochemical tests and DFT calculations provided mechanistic insights to explain the enhanced catalysis, suggesting that the accelerated Fe(III)/Fe(II) cycling and the enhanced mass transport and electron transfer accounted for the efficient trimethoprim degradation. |
Note: | Reproducció del document publicat a: https://doi.org/10.1016/j.cej.2022.140757 |
It is part of: | Chemical Engineering Journal, 2022, vol. 455, num. Part 2, p. 140757 |
URI: | http://hdl.handle.net/2445/196353 |
Related resource: | https://doi.org/10.1016/j.cej.2022.140757 |
ISSN: | 1385-8947 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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