Ultra-uniform MIL-88B(Fe)/Fe3S4 hybrids engineered by partial sulfidation to boost catalysis in electro-Fenton treatment of micropollutants: Experimental and mechanistic insights
| Autor: | Zhihong Ye, Wenfeng Zhang, Sonia Lanzalaco, Lele Zhao, Ignasi Sirés, Pan Xia, Jun Zhai, Qiang He |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. IMEM-BRT- Innovation in Materials and Molecular Engineering - Biomaterials for Regenerative Therapies |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
Depuració de l'aigua
Ferric oxide Water purification Metal-organic framework General Chemical Engineering Residus sanitaris General Chemistry Industrial and Manufacturing Engineering Catalysis Fe(II) regeneration Electroquímica Heterogeneous electro-Fenton Enginyeria química [Àrees temàtiques de la UPC] Medical wastes Catàlisi Electrochemistry Environmental Chemistry Pharmaceutical pollution Water treatment Òxid de ferro |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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