Mostrar el registro sencillo del ítem

dc.contributor.authorCruz Pacheco, Andrés Felipe
dc.contributor.authorGómez-Cuaspud, Jairo. A.
dc.contributor.authorparra vargas, carlos arturo
dc.contributor.authorCarda Castelló, Juan Bautista
dc.date.accessioned2017-12-21T11:13:18Z
dc.date.available2017-12-21T11:13:18Z
dc.date.issued2017-07
dc.identifier.citationCruz Pacheco, A.F., Gómez Cuaspud, J.A., Parra Vargas, C.A. et al. J Mater Sci: Mater Electron (2017) 28: 16358. https://doi.org/10.1007/s10854-017-7546-6ca_CA
dc.identifier.urihttp://hdl.handle.net/10234/171310
dc.description.abstractThe current work describes the synthesis of Ce1−xPrxO2 (x = 0.0, 0.2, 0.4, 0.6, 0.8) and Pr6O11 systems by the combustion method, using citric acid as chelating agent. The obtained solids after combustion and calcination processes were characterized by thermal analysis (TGA-DTA) and infrared spectroscopy (FT-IR) to evaluate the chemical process during the combustion reaction. The surface area analysis using isotherms of nitrogen adsorption, reveal that all samples exhibit values between 70 and 135 m2 g−1, with a pore volume that allows its classification as mesoporous materials. The structural analysis by X-ray diffraction (XRD) and Rietveld refinement, revealed the obtention of a pure cubic structure Fm3m (225) along all cerium oxide modifications with nanocrystalline domain sizes, except for the praseodymium oxide that shows two crystalline phases in a monoclinic crystalline phase P121/c 1 (14) in the case of Pr6O11 and a cubic phase Fm3m (225) for PrO2 oxide. The oxygen storage capacity measurements performed in all samples, demonstrate that exchange of Ce ions by Pr increases the storage capacity of samples over the reference values in accordance with the synthesis method. The characterization by high-resolution transmission electron microscopy, confirmed that the solids are composed by nanometric aggregates with d spacing between 0.29 and 0.31 nm along main diffraction signals, in accordance with the experimental XRD results. Finally, the magnetic characterization in a ZFC configuration and a M-H mode, shows a strong paramagnetic behavior in all systems except in CeO2 oxide, which exhibited a prevalent diamagnetic behavior.ca_CA
dc.format.extent8 p.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherSpringerca_CA
dc.rights© Springer Science+Business Media, LLC 2017ca_CA
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/*
dc.subjectcombustionca_CA
dc.subjectsynthesisca_CA
dc.subjectthermal analysisca_CA
dc.titleCombustion synthesis, structural and magnetic characterization of Ce1-xPrxO2 systemca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttps://doi.org/10.1007/s10854-017-7546-6
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccessca_CA
dc.relation.publisherVersionhttps://link.springer.com/article/10.1007/s10854-017-7546-6#Abs1ca_CA
dc.type.versioninfo:eu-repo/semantics/publishedVersionca_CA


Ficheros en el ítem

FicherosTamañoFormatoVer

No hay ficheros asociados a este ítem.

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem