Size Effect in Hybrid TiO2:Au Nanostars for Photocatalytic Water Remediation Applications

TiO2:Au-based photocatalysis represents a promising alternative to remove contaminants of emerging concern (CECs) from wastewater under sunlight irradiation. However, spherical Au nanoparticles, generally used to sensitize TiO2, still limit the photocatalytic spectral band to the 520 nm region, negl...

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Autores: Zheng, Fangyuan, Martins, Pedro M., Queirós, Joana M., Tavares, Carlos J., Vilas Vilela, José Luis, Lanceros Méndez, Senentxu, Reguera Gómez, Javier
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/58560
Acceso en línea:http://hdl.handle.net/10810/58560
Access Level:acceso abierto
Palabra clave:antibiotic degradation
hybrid TiO2:Au nanoparticles
visible photocatalysis
water remediation
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spelling Size Effect in Hybrid TiO2:Au Nanostars for Photocatalytic Water Remediation ApplicationsZheng, FangyuanMartins, Pedro M.Queirós, Joana M.Tavares, Carlos J.Vilas Vilela, José LuisLanceros Méndez, SenentxuReguera Gómez, Javierantibiotic degradationhybrid TiO2:Au nanoparticlesvisible photocatalysiswater remediationTiO2:Au-based photocatalysis represents a promising alternative to remove contaminants of emerging concern (CECs) from wastewater under sunlight irradiation. However, spherical Au nanoparticles, generally used to sensitize TiO2, still limit the photocatalytic spectral band to the 520 nm region, neglecting a high part of sun radiation. Here, a ligand-free synthesis of TiO2:Au nanostars is reported, substantially expanding the light absorption spectral region. TiO2:Au nanostars with different Au component sizes and branching were generated and tested in the degradation of the antibiotic ciprofloxacin. Interestingly, nanoparticles with the smallest branching showed the highest photocatalytic degradation, 83% and 89% under UV and visible radiation, together with a threshold in photocatalytic activity in the red region. The applicability of these multicomponent nanoparticles was further explored with their incorporation into a porous matrix based on PVDF-HFP to open the way for a reusable energy cost-effective system in the photodegradation of polluted waters containing CECsThis research was funded by Spanish State Research Agency (AEI) through the project PID2019-106099RB-C43/AEI/10.13039/501100011033 and the Basque Government under the ELKARTEK program. P.M.M. thanks the FCT for contract 2020.02802.CEECIND. C.J.T. acknowledges the funding from FCT/PIDDAC through the Strategic Funds project reference UIDB/04650/2020-2023. F.Z. thanks the University of the Basque Country (UPV/EHU) for the PhD fellowship.MDPI2022202220222022info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/58560reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/MICINN/PID2019-106099RB-C43/https://www.mdpi.com/1422-0067/23/22/13741info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/© 2022 by the authors.Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/ 4.0/).oai:addi.ehu.eus:10810/585602026-06-18T09:23:17Z
dc.title.none.fl_str_mv Size Effect in Hybrid TiO2:Au Nanostars for Photocatalytic Water Remediation Applications
title Size Effect in Hybrid TiO2:Au Nanostars for Photocatalytic Water Remediation Applications
spellingShingle Size Effect in Hybrid TiO2:Au Nanostars for Photocatalytic Water Remediation Applications
Zheng, Fangyuan
antibiotic degradation
hybrid TiO2:Au nanoparticles
visible photocatalysis
water remediation
title_short Size Effect in Hybrid TiO2:Au Nanostars for Photocatalytic Water Remediation Applications
title_full Size Effect in Hybrid TiO2:Au Nanostars for Photocatalytic Water Remediation Applications
title_fullStr Size Effect in Hybrid TiO2:Au Nanostars for Photocatalytic Water Remediation Applications
title_full_unstemmed Size Effect in Hybrid TiO2:Au Nanostars for Photocatalytic Water Remediation Applications
title_sort Size Effect in Hybrid TiO2:Au Nanostars for Photocatalytic Water Remediation Applications
dc.creator.none.fl_str_mv Zheng, Fangyuan
Martins, Pedro M.
Queirós, Joana M.
Tavares, Carlos J.
Vilas Vilela, José Luis
Lanceros Méndez, Senentxu
Reguera Gómez, Javier
author Zheng, Fangyuan
author_facet Zheng, Fangyuan
Martins, Pedro M.
Queirós, Joana M.
Tavares, Carlos J.
Vilas Vilela, José Luis
Lanceros Méndez, Senentxu
Reguera Gómez, Javier
author_role author
author2 Martins, Pedro M.
Queirós, Joana M.
Tavares, Carlos J.
Vilas Vilela, José Luis
Lanceros Méndez, Senentxu
Reguera Gómez, Javier
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv antibiotic degradation
hybrid TiO2:Au nanoparticles
visible photocatalysis
water remediation
topic antibiotic degradation
hybrid TiO2:Au nanoparticles
visible photocatalysis
water remediation
description TiO2:Au-based photocatalysis represents a promising alternative to remove contaminants of emerging concern (CECs) from wastewater under sunlight irradiation. However, spherical Au nanoparticles, generally used to sensitize TiO2, still limit the photocatalytic spectral band to the 520 nm region, neglecting a high part of sun radiation. Here, a ligand-free synthesis of TiO2:Au nanostars is reported, substantially expanding the light absorption spectral region. TiO2:Au nanostars with different Au component sizes and branching were generated and tested in the degradation of the antibiotic ciprofloxacin. Interestingly, nanoparticles with the smallest branching showed the highest photocatalytic degradation, 83% and 89% under UV and visible radiation, together with a threshold in photocatalytic activity in the red region. The applicability of these multicomponent nanoparticles was further explored with their incorporation into a porous matrix based on PVDF-HFP to open the way for a reusable energy cost-effective system in the photodegradation of polluted waters containing CECs
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/58560
url http://hdl.handle.net/10810/58560
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MICINN/PID2019-106099RB-C43/
https://www.mdpi.com/1422-0067/23/22/13741
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
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