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Tuning the magnetic properties of Sn1?x?yCe4+xCe3+yO2nanoparticles: an experimental and theoretical approach

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dc.contributor.author Aragón F.F.H. es_PE
dc.contributor.author Villegas-Lelovsky L. es_PE
dc.contributor.author Cabral L. es_PE
dc.contributor.author Lima M.P. es_PE
dc.contributor.author Mesquita A. es_PE
dc.contributor.author Coaquira J.A.H. es_PE
dc.date.accessioned 2024-05-30T23:13:38Z
dc.date.available 2024-05-30T23:13:38Z
dc.date.issued 2021
dc.description.abstract During the last decade, there was a substantial increase in the research on metal-doped oxide semiconductor nanoparticles due to advances in the engineering of nanomaterials and their potential application in spintronics, biomedicine and photocatalysis fields. In this regard, doping a nanomaterial is a powerful tool to tune its physicochemical properties. The aim of this work is to shine a new light on the role of the neighbouring elements on the oxidation state of the Ce-impurity, from both experimental and theoretical points of view. Herein, we present an accurate study of the mechanisms involved in the oxidation states of the Ce-ions during the doping process of SnO2nanoparticles (NPs) prepared by the polymeric precursor method. X-ray diffraction measurements have displayed the tetragonal rutile-type SnO2phase in all samples. However, the Bragg’s peak (111) and (220) located at 2??29° and ?47° evidence the formation of a secondary CeO2phase for samples with Ce content up to 10%. X-ray absorption near-edge structure (XANES) measurements, at Ce L3 edge, were performed on the NPs as a function of Ce content. The results show, on one side, the coexistence of Ce3+and Ce4+states in all samples; and on the other side, a clear reduction in the Ce3+population driven by the increase of Ce content. It is shown that this is induced by the neighboring cation, and confirmed by magnetic measurements. The monotonic damping of the Ce3+/Ce4+ratio experimentally, was connected with theoretical calculationsviadensity functional theory by simulating a variety of point defects composed of Ce impurities and surrounding oxygen vacancies. We found that the number of oxygen vacancies around the Ce-ions is the main ingredient to change the Ce oxidation state, and hence the magnetic properties of Ce-doped SnO2NPs. The presented results pave the way for handling the magnetic properties of oxides through the control of the oxidation state of impurities. © The Royal Society of Chemistry 2021.
dc.description.sponsorship Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concytec
dc.identifier.doi https://doi.org/10.1039/d0na00700e
dc.identifier.scopus 2-s2.0-85102279091
dc.identifier.uri https://hdl.handle.net/20.500.12390/2371
dc.language.iso eng
dc.publisher Royal Society of Chemistry
dc.relation.ispartof Nanoscale Advances
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject Titanium dioxide
dc.subject Magnetic properties es_PE
dc.subject Magnetism es_PE
dc.subject Metal nanoparticles es_PE
dc.subject Nanostructured materials es_PE
dc.subject OxidationOxide minerals es_PE
dc.subject Oxide semiconductors es_PE
dc.subject Oxygen vacancies es_PE
dc.subject Physicochemical properties es_PE
dc.subject Point defects es_PE
dc.subject Semiconductor doping es_PE
dc.subject.ocde http://purl.org/pe-repo/ocde/ford#1.01.02
dc.title Tuning the magnetic properties of Sn1?x?yCe4+xCe3+yO2nanoparticles: an experimental and theoretical approach
dc.type info:eu-repo/semantics/article
dspace.entity.type Publication
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