Engineered SnO 2/BiOI fibers via electrospinning for robust visible-light/peroxymonosulfate -driven multipollutant mineralization

Engineered photocatalysts capable of operating under visible light and realistic water matrices are needed to address emerging pharmaceutical contaminants. Here, we fabricate SnO<sub>2</sub>/BiOI fibrous heterostructures by electrospinning SnO<sub>2</...

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Autores: Huidobro, Laura, Allés, Miquel, Abid, Mahmoud, Bechelany, Mikhael, Sousa Romero, Carmen, Gómez, Elvira, Serrà i Ramos, Albert
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2026
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:dnet:recercat____::417b5b556acb449fe02fe14651d4f5ab
Acceso en línea:https://hdl.handle.net/2445/229484
Access Level:acceso abierto
Palabra clave:Fotoelectroquímica
Fotocatàlisi
Absorció de la llum
Photoelectrochemistry
Photocatalysis
Light absorption
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spelling Engineered SnO 2/BiOI fibers via electrospinning for robust visible-light/peroxymonosulfate -driven multipollutant mineralizationHuidobro, LauraAllés, MiquelAbid, MahmoudBechelany, MikhaelSousa Romero, CarmenGómez, ElviraSerrà i Ramos, AlbertFotoelectroquímicaFotocatàlisiAbsorció de la llumPhotoelectrochemistryPhotocatalysisLight absorptionEngineered photocatalysts capable of operating under visible light and realistic water matrices are needed to address emerging pharmaceutical contaminants. Here, we fabricate SnO<sub>2</sub>/BiOI fibrous heterostructures by electrospinning SnO<sub>2</sub> nanofibers decorated with solvothermally synthesized BiOI followed by calcination. The electrospun fibers provide a mechanically robust, high-surface-area scaffold, while BiOI incorporation enhances visible-light absorption and creates SnO<sub>2</sub>/BiOI heterointerfaces. Textural, optical, and spectroscopic analyses reveal progressive surface decoration, increased surface area, and defect-rich Bi environments as BiOI loading increases. Using tetracycline (TC) as a model contaminant at neutral pH, SnO<sub>2</sub>/BiOI composites markedly outperform pristine SnO<sub>2</sub> under visible light and/or peroxymonosulfate (PMS), with an optimal BiOI content (SBO2) under single-stimulus conditions and near-complete TC mineralization for the highest loading (SBO3) in the PMS + visible-light system. Radical scavenging indicates that SO<sub>4</sub><sup>•−</sup> and <sup>•</sup>OH are the dominant reactive species, with O<sub>2</sub><sup>•−</sup>, h<sup>+</sup> and e<sup>−</sup> playing secondary roles. A multipollutant mixture (TC, sulfamethoxazole, levofloxacin, lansoprazole) is mineralized by >80% in both Milli-Q and tap water, and SBO3 retains high activity over nine cycles with Bi and I leaching below 0.05% after 48 h. Density functional theory calculations, combined with XPS, support an S-scheme SnO<sub>2</sub>/BiOI heterojunction, enabling spatial separation of strongly reducing electrons in BiOI and oxidizing holes in SnO<sub>2</sub>. Although high PMS loadings can partially mask intrinsic catalyst differences, these results outline a practical design platform for heterogeneous (slurry), visible-responsive, PMS-assisted photocatalysts for pharmaceutical-laden effluents.Elsevier B.V.2026202620262026info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion16 p.application/pdfhttps://hdl.handle.net/2445/229484https://hdl.handle.net/2445/229484reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1016/j.cej.2026.174316Chemical Engineering Journal, 2026, vol. 531, p. 174316https://doi.org/10.1016/j.cej.2026.174316cc-by (c) Huidobro, Laura et al., 2026http://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:dnet:recercat____::417b5b556acb449fe02fe14651d4f5ab2026-05-29T05:05:01Z
dc.title.none.fl_str_mv Engineered SnO 2/BiOI fibers via electrospinning for robust visible-light/peroxymonosulfate -driven multipollutant mineralization
title Engineered SnO 2/BiOI fibers via electrospinning for robust visible-light/peroxymonosulfate -driven multipollutant mineralization
spellingShingle Engineered SnO 2/BiOI fibers via electrospinning for robust visible-light/peroxymonosulfate -driven multipollutant mineralization
Huidobro, Laura
Fotoelectroquímica
Fotocatàlisi
Absorció de la llum
Photoelectrochemistry
Photocatalysis
Light absorption
title_short Engineered SnO 2/BiOI fibers via electrospinning for robust visible-light/peroxymonosulfate -driven multipollutant mineralization
title_full Engineered SnO 2/BiOI fibers via electrospinning for robust visible-light/peroxymonosulfate -driven multipollutant mineralization
title_fullStr Engineered SnO 2/BiOI fibers via electrospinning for robust visible-light/peroxymonosulfate -driven multipollutant mineralization
title_full_unstemmed Engineered SnO 2/BiOI fibers via electrospinning for robust visible-light/peroxymonosulfate -driven multipollutant mineralization
title_sort Engineered SnO 2/BiOI fibers via electrospinning for robust visible-light/peroxymonosulfate -driven multipollutant mineralization
dc.creator.none.fl_str_mv Huidobro, Laura
Allés, Miquel
Abid, Mahmoud
Bechelany, Mikhael
Sousa Romero, Carmen
Gómez, Elvira
Serrà i Ramos, Albert
author Huidobro, Laura
author_facet Huidobro, Laura
Allés, Miquel
Abid, Mahmoud
Bechelany, Mikhael
Sousa Romero, Carmen
Gómez, Elvira
Serrà i Ramos, Albert
author_role author
author2 Allés, Miquel
Abid, Mahmoud
Bechelany, Mikhael
Sousa Romero, Carmen
Gómez, Elvira
Serrà i Ramos, Albert
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Fotoelectroquímica
Fotocatàlisi
Absorció de la llum
Photoelectrochemistry
Photocatalysis
Light absorption
topic Fotoelectroquímica
Fotocatàlisi
Absorció de la llum
Photoelectrochemistry
Photocatalysis
Light absorption
description Engineered photocatalysts capable of operating under visible light and realistic water matrices are needed to address emerging pharmaceutical contaminants. Here, we fabricate SnO<sub>2</sub>/BiOI fibrous heterostructures by electrospinning SnO<sub>2</sub> nanofibers decorated with solvothermally synthesized BiOI followed by calcination. The electrospun fibers provide a mechanically robust, high-surface-area scaffold, while BiOI incorporation enhances visible-light absorption and creates SnO<sub>2</sub>/BiOI heterointerfaces. Textural, optical, and spectroscopic analyses reveal progressive surface decoration, increased surface area, and defect-rich Bi environments as BiOI loading increases. Using tetracycline (TC) as a model contaminant at neutral pH, SnO<sub>2</sub>/BiOI composites markedly outperform pristine SnO<sub>2</sub> under visible light and/or peroxymonosulfate (PMS), with an optimal BiOI content (SBO2) under single-stimulus conditions and near-complete TC mineralization for the highest loading (SBO3) in the PMS + visible-light system. Radical scavenging indicates that SO<sub>4</sub><sup>•−</sup> and <sup>•</sup>OH are the dominant reactive species, with O<sub>2</sub><sup>•−</sup>, h<sup>+</sup> and e<sup>−</sup> playing secondary roles. A multipollutant mixture (TC, sulfamethoxazole, levofloxacin, lansoprazole) is mineralized by >80% in both Milli-Q and tap water, and SBO3 retains high activity over nine cycles with Bi and I leaching below 0.05% after 48 h. Density functional theory calculations, combined with XPS, support an S-scheme SnO<sub>2</sub>/BiOI heterojunction, enabling spatial separation of strongly reducing electrons in BiOI and oxidizing holes in SnO<sub>2</sub>. Although high PMS loadings can partially mask intrinsic catalyst differences, these results outline a practical design platform for heterogeneous (slurry), visible-responsive, PMS-assisted photocatalysts for pharmaceutical-laden effluents.
publishDate 2026
dc.date.none.fl_str_mv 2026
2026
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/229484
https://hdl.handle.net/2445/229484
url https://hdl.handle.net/2445/229484
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1016/j.cej.2026.174316
Chemical Engineering Journal, 2026, vol. 531, p. 174316
https://doi.org/10.1016/j.cej.2026.174316
dc.rights.none.fl_str_mv cc-by (c) Huidobro, Laura et al., 2026
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Huidobro, Laura et al., 2026
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 16 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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