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Enhanced Visible Light-Driven Photocatalytic Water-Splitting Reaction of Titanate Nanotubes Sensitised with Ru(II) Bipyridyl Complex

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Enhanced Visible Light-Driven Photocatalytic Water-Splitting Reaction of Titanate Nanotubes Sensitised with Ru(II) Bipyridyl Complex

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dc.contributor.author Malizia, Mauro es_ES
dc.contributor.author Scott, Stuart A. es_ES
dc.contributor.author Torrente-Murciano, Laura es_ES
dc.contributor.author Garcia-Baldovi, Hermenegildo es_ES
dc.contributor.author Boies, Adam M. es_ES
dc.contributor.author Aljohani, Talal A. es_ES
dc.date.accessioned 2024-07-05T18:12:16Z
dc.date.available 2024-07-05T18:12:16Z
dc.date.issued 2023-11 es_ES
dc.identifier.uri http://hdl.handle.net/10251/205814
dc.description.abstract [EN] The ion exchange of Na+ cations was used to photosensitise titanates nanotubes (Ti-NTs) with tris(2,2'-bipyridine)ruthenium(II) cations (Ru(bpy)(3)(2+)); this yielded a light-sensitised Ti-NTs composite denoted as (Ru(bpy)(3))Ti-NTs, exhibiting the characteristic absorption of Ru(bpy)(3)(2+) in visible light. Incident photon-to-current efficiency (IPCE) measurements and the photocatalytic reduction of methyl viologen reaction confirmed that in the photosensitisation of the (Ru(bpy)(3))Ti-NTs composite, charge transfer and charge separation occur upon excitation by ultraviolet and visible light irradiation. The photocatalytic potential of titanate nanotubes was tested in the water-splitting reaction and the H-2 evolution reaction using a sacrificial agent and showed photocatalytic activity under various light sources, including xenon-mercury lamp, simulated sunlight, and visible light. Notably, in the conditions of the H-2 evolution reaction when (Ru(bpy)(3))Ti-NTs were submitted to simulated sunlight, they exceeded the photocatalytic activity of pristine Ti-NTs and TiO2 by a factor of 3 and 3.5 times, respectively. Also, (Ru(bpy)(3))Ti-NTs achieved the photocatalytic water-splitting reaction under simulated sunlight and visible light, producing, after 4 h, 199 and 282 mu molxH(2x)g(cat)(-1). These results confirm the effective electron transfer of Ru(bpy)(3) to titanate nanotubes. The stability of the photocatalyst was evaluated by a reuse test of four cycles of 24 h reactions without considerable loss of catalytic activity and crystallinity. es_ES
dc.description.sponsorship We gratefully acknowledge King Abdulaziz City for Science and Technology (KACST) for funding (Grant no: 20-0170). es_ES
dc.language Inglés es_ES
dc.publisher MDPI AG es_ES
dc.relation.ispartof Nanomaterials es_ES
dc.rights Reconocimiento (by) es_ES
dc.subject Titanate nanotubes es_ES
dc.subject Ion exchange es_ES
dc.subject Tris(2,20-bipyridine)ruthenium(II) es_ES
dc.subject Photocatalysis es_ES
dc.subject Water splitting es_ES
dc.subject Solar simulated light es_ES
dc.subject Hydrogen evolution reaction es_ES
dc.subject Dye-sensitized photocatalyst es_ES
dc.title Enhanced Visible Light-Driven Photocatalytic Water-Splitting Reaction of Titanate Nanotubes Sensitised with Ru(II) Bipyridyl Complex es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.3390/nano13222959 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/KAU//20-0170/ es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Química - Departament de Química es_ES
dc.description.bibliographicCitation Malizia, M.; Scott, SA.; Torrente-Murciano, L.; Garcia-Baldovi, H.; Boies, AM.; Aljohani, TA. (2023). Enhanced Visible Light-Driven Photocatalytic Water-Splitting Reaction of Titanate Nanotubes Sensitised with Ru(II) Bipyridyl Complex. Nanomaterials. 13(22). https://doi.org/10.3390/nano13222959 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.3390/nano13222959 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 13 es_ES
dc.description.issue 22 es_ES
dc.identifier.eissn 2079-4991 es_ES
dc.identifier.pmid 37999313 es_ES
dc.identifier.pmcid PMC10674862 es_ES
dc.relation.pasarela S\521666 es_ES
dc.contributor.funder King Abdulaziz University es_ES
dc.contributor.funder Universitat Politècnica de València es_ES
upv.costeAPC 3800 es_ES


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