Au/TiO2 2D-Photonic Crystals as UV–Visible Photocatalysts for H2 Production

Noble metal decoration of wideband gap semiconductors enables the excitation of surface plasmons in the visible range that upon relaxation generate hot carriers used for catalysis. However, this strategy leads to photocatalytic conversion efficiencies that are still low. Here, a light-trapping schem...

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Detalles Bibliográficos
Autores: Torras, Miquel, Molet, Pau, Soler, Lluís, Llorca, Jordi, Roig Serra, Anna, Mihi, Agustín
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:10261/264630
Acceso en línea:http://hdl.handle.net/10261/264630
https://api.elsevier.com/content/abstract/scopus_id/85122032407
Access Level:acceso abierto
Palabra clave:Gold nanoparticles
Hydrogen production
Photonic structures
Soft-lithography nanoimprint
Titanium dioxide
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spelling Au/TiO2 2D-Photonic Crystals as UV–Visible Photocatalysts for H2 ProductionTorras, MiquelMolet, PauSoler, LluísLlorca, JordiRoig Serra, AnnaMihi, AgustínGold nanoparticlesHydrogen productionPhotonic structuresSoft-lithography nanoimprintTitanium dioxideNoble metal decoration of wideband gap semiconductors enables the excitation of surface plasmons in the visible range that upon relaxation generate hot carriers used for catalysis. However, this strategy leads to photocatalytic conversion efficiencies that are still low. Here, a light-trapping scheme is used to amplify the light-harvesting efficiency of the TiO2 semiconductor beyond the UV region by coupling a 2D-photonic crystal to Au decorated titania. This approach is easily scalable using soft nanoimprinting lithography to prepare Au/TiO2 2D-photonic photocatalysts. In a first process, gold nanoparticles (Au NPs) are in situ infiltrated in the superficial 50 nm of a mesoporous titania (mTiO2) scaffold patterned with the photonic structure, while in a second one 2D-photonic crystals with a homogeneous volume distribution of the Au colloids are achieved. The dependence of the optical properties of the photonic crystals on the lattice parameter, geometry, and metal loading is presented through extinction measurements and analyzed through simulations. The improved photocatalytic performance of the substrates is tested for hydrogen production where a maximum of 8.5 mmol gcat−1 h−1 of H2 is recorded and attributed to photonic–plasmonic effects. These results may open new avenues in solar harvesting for hydrogen production using photonic crystals as photocatalysts.M.T. and P.M. contributed equally to this work. This research received funding from the Spanish Ministry of Science, Innovation and Universities, through the RTI2018-096273-B-I00, RTI2018-093996-B-C31, and PID2019-106860GB-I00 projects, the “Severo Ochoa” Programme for Centers of Excellence in R&D grant FUNFUTURE (CEX2019-000917-S), and the Generalitat de Catalunya (2017SGR765 and 2017SGR128 grants). The Spanish Ministry of Education, Culture and Sport, is funding the FPU Fellow of MT (FPU16/05452). P.M. acknowledges financial support from an FPI contract (2017) of the MICINN (Spain) cofounded by the ESF and the UAB. M.T. is enrolled in the Materials Science Ph.D. Program of the UAB (Universitat Autònoma de Barcelona). L.S. is grateful to MICINN Ramon y Cajal program for individual fellowship grant agreement RYC2019-026704-I. J.L. is a Serra Húnter Fellow and is grateful to ICREA Academia Program.With funding from the Spanish government through the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000917-S).Peer reviewedWiley-VCHMinisterio de Ciencia, Innovación y Universidades (España)Generalitat de CatalunyaTorras, Miquel [0000-0001-7132-6217]Molet, Pau [0000-0003-3693-0309]Soler, Lluís [0000-0003-1591-3366]Llorca, Jordi [0000-0002-7447-9582]Roig Serra, Anna [0000-0001-6464-7573]Mihi, Agustín [0000-0003-3821-7881]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/264630https://api.elsevier.com/content/abstract/scopus_id/85122032407reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-096273-B-I00info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-093996-B-C31info:eu-repo/grantAgreement/MICIU/Plan Estatal de investigación Científica y Técnica y de Innovación 2017-2020/CEX2019-000917-SAdvanced Energy Materialshttp://dx.doi.org/10.1002/aenm.202103733Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2646302026-05-22T06:33:51Z
dc.title.none.fl_str_mv Au/TiO2 2D-Photonic Crystals as UV–Visible Photocatalysts for H2 Production
title Au/TiO2 2D-Photonic Crystals as UV–Visible Photocatalysts for H2 Production
spellingShingle Au/TiO2 2D-Photonic Crystals as UV–Visible Photocatalysts for H2 Production
Torras, Miquel
Gold nanoparticles
Hydrogen production
Photonic structures
Soft-lithography nanoimprint
Titanium dioxide
title_short Au/TiO2 2D-Photonic Crystals as UV–Visible Photocatalysts for H2 Production
title_full Au/TiO2 2D-Photonic Crystals as UV–Visible Photocatalysts for H2 Production
title_fullStr Au/TiO2 2D-Photonic Crystals as UV–Visible Photocatalysts for H2 Production
title_full_unstemmed Au/TiO2 2D-Photonic Crystals as UV–Visible Photocatalysts for H2 Production
title_sort Au/TiO2 2D-Photonic Crystals as UV–Visible Photocatalysts for H2 Production
dc.creator.none.fl_str_mv Torras, Miquel
Molet, Pau
Soler, Lluís
Llorca, Jordi
Roig Serra, Anna
Mihi, Agustín
author Torras, Miquel
author_facet Torras, Miquel
Molet, Pau
Soler, Lluís
Llorca, Jordi
Roig Serra, Anna
Mihi, Agustín
author_role author
author2 Molet, Pau
Soler, Lluís
Llorca, Jordi
Roig Serra, Anna
Mihi, Agustín
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
Generalitat de Catalunya
Torras, Miquel [0000-0001-7132-6217]
Molet, Pau [0000-0003-3693-0309]
Soler, Lluís [0000-0003-1591-3366]
Llorca, Jordi [0000-0002-7447-9582]
Roig Serra, Anna [0000-0001-6464-7573]
Mihi, Agustín [0000-0003-3821-7881]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Gold nanoparticles
Hydrogen production
Photonic structures
Soft-lithography nanoimprint
Titanium dioxide
topic Gold nanoparticles
Hydrogen production
Photonic structures
Soft-lithography nanoimprint
Titanium dioxide
description Noble metal decoration of wideband gap semiconductors enables the excitation of surface plasmons in the visible range that upon relaxation generate hot carriers used for catalysis. However, this strategy leads to photocatalytic conversion efficiencies that are still low. Here, a light-trapping scheme is used to amplify the light-harvesting efficiency of the TiO2 semiconductor beyond the UV region by coupling a 2D-photonic crystal to Au decorated titania. This approach is easily scalable using soft nanoimprinting lithography to prepare Au/TiO2 2D-photonic photocatalysts. In a first process, gold nanoparticles (Au NPs) are in situ infiltrated in the superficial 50 nm of a mesoporous titania (mTiO2) scaffold patterned with the photonic structure, while in a second one 2D-photonic crystals with a homogeneous volume distribution of the Au colloids are achieved. The dependence of the optical properties of the photonic crystals on the lattice parameter, geometry, and metal loading is presented through extinction measurements and analyzed through simulations. The improved photocatalytic performance of the substrates is tested for hydrogen production where a maximum of 8.5 mmol gcat−1 h−1 of H2 is recorded and attributed to photonic–plasmonic effects. These results may open new avenues in solar harvesting for hydrogen production using photonic crystals as photocatalysts.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/264630
https://api.elsevier.com/content/abstract/scopus_id/85122032407
url http://hdl.handle.net/10261/264630
https://api.elsevier.com/content/abstract/scopus_id/85122032407
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-096273-B-I00
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-093996-B-C31
info:eu-repo/grantAgreement/MICIU/Plan Estatal de investigación Científica y Técnica y de Innovación 2017-2020/CEX2019-000917-S
Advanced Energy Materials
http://dx.doi.org/10.1002/aenm.202103733
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Wiley-VCH
publisher.none.fl_str_mv Wiley-VCH
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
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