Zirconium-based Metal-Organic Frameworks for highly efficient solar light-driven photoelectrocatalytic disinfection
Two synthesized zirconium-based Metal-Organic Frameworks (Zr-MOFs), using 2,6-naphthalenedicarboxylic acid (NDC) and amino-functionalized NDC (4,8-diaminonaphthalene-2,6-dicarboxylic acid, NDC-2NH2) as linkers, have been studied in photoelectrocatalytic disinfection processes. The Zr-based MOFs were...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/365527 |
| Acceso en línea: | http://hdl.handle.net/10261/365527 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121930382&doi=10.1016%2fj.seppur.2021.120351&partnerID=40&md5=5cebda1418083c1b3af3acc668581786 |
| Access Level: | acceso abierto |
| Palabra clave: | Disinfection Metal-organic framework Photoelectrocatalysis Solar light Zirconium Bacteria Electric lamps Irradiation Organometallics Colony forming units Metalorganic frameworks (MOFs) Photo-catalytic Photo-electrocatalysis Photoelectrocatalytic Solar irradiation Solar-light-driven Xe arc lamps |
| Sumario: | Two synthesized zirconium-based Metal-Organic Frameworks (Zr-MOFs), using 2,6-naphthalenedicarboxylic acid (NDC) and amino-functionalized NDC (4,8-diaminonaphthalene-2,6-dicarboxylic acid, NDC-2NH2) as linkers, have been studied in photoelectrocatalytic disinfection processes. The Zr-based MOFs were deposited onto graphite paper and were deeply analysed to unravel their behaviour in electrocatalytic (EC), photocatalytic (PC) and photoelectrocatalytic (PEC) configurations under solar (Xe-arc lamp), visible (Xe-arc lamp + 400 nm cut-off filter) and 365 nm UV-LED irradiation. TPC results showed reproducible photocurrent response upon repeated on–off cycles and bandgaps were calculated to be 3.13 and 2.11 eV for Zr-NDC and Zr-NDC-2NH2, respectively. The highest photocurrent was obtained for 365 nm UVA in Zr-NDC and was similar for both UVA and solar irradiation in the case of Zr-NDC-2NH2. The Zr-MOFs catalytic electrodes were evaluated for their disinfection activity using a strain of Staphylococcus aureus and performance tracked by measuring colony forming units (CFU). The disinfection efficiency was higher in PEC than PC studies (>2-log reduction or 99 % CFU inhibition) under 365 nm UVA irradiation, suggesting that the anodic bias potential effectively minimized the recombination of the photogenerated electron-hole pairs. A complete disinfection was reached after 60 and 20 min under irradiation of full Xe-arc (solar) spectrum in PC and PEC runs, respectively, for both Zr-MOFs. The high disinfection capacity under solar irradiation was attributed to the transfer of photoexcited electrons from ligand to cluster by high energy photons. © 2021 Elsevier B.V. |
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