Insight into (electro)magnetic interactions within facet-engineered BaFe 12 O 19 /TiO 2 magnetic photocatalysts

dc.contributor.authorDudziak, Szymon
dc.contributor.authorGómez Polo, Cristina
dc.contributor.authorKarczewski, Jakub
dc.contributor.authorNikiforow, Kostiantyn
dc.contributor.authorZielinska-Jurek, Anna
dc.contributor.departmentCienciases_ES
dc.contributor.departmentZientziakeu
dc.contributor.departmentInstitute for Advanced Materials and Mathematics - INAMAT2en
dc.date.accessioned2024-05-27T08:44:01Z
dc.date.available2024-05-27T08:44:01Z
dc.date.issued2023
dc.date.updated2024-05-27T08:33:02Z
dc.description.abstractA series of facet-engineered TiO2/BaFe12O19 composites were synthesized through hydrothermal growth of both phases and subsequent deposition of the different, faceted TiO2 nanoparticles onto BaFe12O19 microplates. The well-defined geometry of the composite and uniaxial magnetic anisotropy of the ferrite allowed alternate interfaces between both phases and fixed the orientation between the TiO2 crystal structure and the remanent magnetic field within BaFe12O19. The morphology and crystal structure of the composites were confirmed by a combination of scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses together with the detailed study of BaFe12O19 electronic and magnetic properties. The photocatalytic activity and magnetic field effect were studied in the reaction of phenol degradation for TiO2/BaFe12O19 and composites of BaFe12O19 covered with a SiO2 protective layer and TiO2. The observed differences in phenol degradation are associated with electron transfer and the contribution of the magnetic field. All obtained magnetic composite materials can be easily separated in an external magnetic field, with efficiencies exceeding 95%, and recycled without significant loss of photocatalytic activity. The highest activity was observed for the composite of BaFe12O19 with TiO2 exposing {1 0 1} facets. However, to prevent electron transfer within the composite structure, this photocatalyst material was additionally coated with a protective SiO2 layer. Furthermore, TiO2 exposing {1 0 0} facets exhibited significant synergy with the BaFe12O19 magnetic field, leading to 2 times higher photocatalytic activity when ferrite was magnetized before the process. The photoluminescence emission study suggests that for this particular combination, the built-in magnetic field of the ferrite suppressed the recombination of the photogenerated charge carriers. Ultimately, possible effects of complex electro/magnetic interactions within the magnetic photocatalyst are shown and discussed for the first time, including the anisotropic properties of both phases.en
dc.description.sponsorshipThis work was financially supported by the Polish National Science Center with grant no. NCN 2018/30/E/ST5/00845 and grant no. NCN 2021/43/B/ST5/02983. Grant PID2020-116321RB-C21 funded by MCIN/AEI/10.13039/501100011033 is also acknowledged.en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationDudziak, S., Gómez-Polo, C., Karczewski, J., Nikiforow, K., Zielinska-Jurek, A. (2023) Insight into (electro)magnetic interactions within facet-engineered BaFe 12 O 19 /TiO 2 magnetic photocatalysts. ACS Applied Materials and Interfaces, 15(48), 56511-56525. https://doi.org/10.1021/acsami.3c13380.es_ES
dc.identifier.doi10.1021/acsami.3c13380
dc.identifier.issn1944-8244
dc.identifier.urihttps://academica-e.unavarra.es/handle/2454/48192
dc.language.isoengen
dc.publisherAmerican Chemical Societyen
dc.relation.ispartofACS Applied Materials and Interfaces (2023), vol. 15(48)es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116321RB-C21/ES/
dc.relation.publisherversionhttps://doi.org/10.1021/acsami.3c13380
dc.rights© 2023 The Authors. This article is licensed under Creative Commons-BY 4.0en
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectBaFe12O19en
dc.subjectTiO2en
dc.subjectMagnetic photocatalysten
dc.subjectMagnetic fielden
dc.subjectCrystalfacetsen
dc.titleInsight into (electro)magnetic interactions within facet-engineered BaFe 12 O 19 /TiO 2 magnetic photocatalystsen
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
relation.isAuthorOfPublication5000e1d8-9426-4c7b-a770-586dbd2b2875
relation.isAuthorOfPublication.latestForDiscovery5000e1d8-9426-4c7b-a770-586dbd2b2875

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