Structural and photoelectrochemical dynamics of in-situ hydrogenated anatase TiO2 thin films grown by DC reactive magnetron sputtering

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dc.contributor.authorVillarroel, Roberto
dc.contributor.authorZambrano-Mera, Dario
dc.contributor.authorEspinoza-Gonzalez, Rodrigo
dc.contributor.authorParedes-Gil, Katherine
dc.contributor.authorPantaleone, Stefano
dc.contributor.authorBallesteros, Luis
dc.contributor.authorOskam, Gerko
dc.contributor.authorGarcia-Merino, Jose A.
dc.contributor.authorHevia, Samuel A.
dc.contributor.authorGonzalez-Moraga, Guillermo
dc.date.accessioned2025-01-20T20:20:42Z
dc.date.available2025-01-20T20:20:42Z
dc.date.issued2023
dc.description.abstractHydrogenation has become one of the most used strategies to improve the photoactive properties of titanium dioxide nanomaterials, n-TiO2. In order to obtain more information about the hydrogenated process on anatase TiO2 thin films and the improvement of the photoactivity of this material, we report a study on the structural changes of hydrogenated anatase thin films produced by direct-current reactive magnetron sputtering. In the first stage of the hydrogenation process, the obtained polycrystalline anatase films present an increment of the {0 0 1} facet according to the amount of hydrogen used in the plasma reaction. At higher hydrogen concentrations, amorphous and rutile phases start to appear. The photoactivity of the hydrogenated anatase samples, H:TiO2, presents a redshift of the photoelectrochemical onset and an increase of the reactivity in the UV region. Both results were experimentally and theoretically related to the formation of defects such as oxygen vacancies and TiH/Ti-OH bonds at the surface of the hydrogenated thin films.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.apsusc.2022.155023
dc.identifier.eissn1873-5584
dc.identifier.issn0169-4332
dc.identifier.urihttps://doi.org/10.1016/j.apsusc.2022.155023
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92592
dc.identifier.wosidWOS:000868980000002
dc.language.isoen
dc.revistaApplied surface science
dc.rightsacceso restringido
dc.subjectHydrogenated anatase TiO 2 thin films
dc.subjectDC reactive magnetron sputtering
dc.subjectPhotoelectrochemical water splitting
dc.subjectStructural properties
dc.subjectDFT
dc.titleStructural and photoelectrochemical dynamics of in-situ hydrogenated anatase TiO2 thin films grown by DC reactive magnetron sputtering
dc.typeartículo
dc.volumen607
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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