Structural and morphological properties of Ce(1−x)FexO2−δ synthesized by citrate route

Cerium-based materials were intensively studied in last years because of their high oxygen storage capacity (OSC) associated to the reversible Ce4+ Ce3+ process and their properties closely related to the defect chemistry that could be adjusted by adequate selection of dopant. Fe3+ cation, due to it...

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Autores principales: Mazan, Mariano Osvaldo, Craievich, Aldo F., Halac, Emilia Beatriz, Fantini, Márcia C. A., Lamas, Diego Germán, Larrondo, Susana Adelina
Formato: publishedVersion Artículo
Lenguaje:Inglés
Publicado: Elsevier 2015
Materias:
CITRATE SYNTHESIS
IRON DOPED CERIA
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION
RAMAN SPECTROSCOPY
CIENCIAS QUÍMICAS
CIENCIAS NATURALES Y EXACTAS
Acceso en línea:https://ri.unsam.edu.ar/handle/123456789/950
Aporte de:
Repositorio Institucional de la UNSAM de Universidad Nacional de General San Martín
id I78-R216-123456789-950
record_format dspace
spelling I78-R216-123456789-9502023-03-27T17:04:56Z Structural and morphological properties of Ce(1−x)FexO2−δ synthesized by citrate route Mazan, Mariano Osvaldo Craievich, Aldo F. Halac, Emilia Beatriz Fantini, Márcia C. A. Lamas, Diego Germán Larrondo, Susana Adelina CITRATE SYNTHESIS IRON DOPED CERIA SCANNING ELECTRON MICROSCOPY X-RAY DIFFRACTION RAMAN SPECTROSCOPY CIENCIAS QUÍMICAS CIENCIAS NATURALES Y EXACTAS info:eu-repo/semantics/publishedVersion Cerium-based materials were intensively studied in last years because of their high oxygen storage capacity (OSC) associated to the reversible Ce4+ Ce3+ process and their properties closely related to the defect chemistry that could be adjusted by adequate selection of dopant. Fe3+ cation, due to its effective ionic radius smaller than that of Ce4+, is an interesting doping agent. In this work we present the synthesis and characterization of Ce(1-x)FexO2-δ mixed oxides (0<x<1) synthesized by the so named ?citrate method?. Our X-ray diffraction results suggest a rather strong dependence of lattice parameter on nanocrystal size, while Raman spectroscopy evidenced the formation of a small volume fraction of hematite clusters in samples with relatively high iron content, x>0.15, not observable in X-ray diffraction experiments. The solidsolutions exhibit high porosity and specific surface area, with nearly 10% of pore volume in the micropore size range, making these materials potentially useful for applications in catalysis. Fil: Mazan, Mariano Osvaldo. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Química; Argentina. Fil: Craievich, Aldo F.. Universidade de Sao Paulo; Brasil Fil: Halac, Emilia Beatriz. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; Argentina Fil: Fantini, Márcia C. A.. Universidade de Sao Paulo; Brasil Fil: Lamas, Diego Germán. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; Argentina Fil: Larrondo, Susana Adelina. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental; Argentina 2015-12 info:eu-repo/semantics/article info:ar-repo/semantics/artículo Mazan, M. O.; Craievich, A. F.; Halac, E. B.; Fantini, M. C. A.; Lamas, D. G. y Larrondo, S. A. (2015). Structural and morphological properties of Ce(1−x)FexO2−δ synthesized by citrate route. En: Ceramics International. Elsevier. 41(10): 13721-13730 ISSN 0272-8842 Ceramics International_2015_41_10_13721-13730 https://ri.unsam.edu.ar/handle/123456789/950 eng info:eu-repo/semantics/restrictedAccess https://s100.copyright.com/AppDispatchServlet?publisherName=ELS&contentID=S0272884215015576&orderBeanReset=true Copyright © 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved. application/pdf pp. 13721-13730 application/pdf Elsevier Ceramics International. 2015, 41(10): 13721-13730 http://doi.org/10.1016/j.ceramint.2015.08.032
institution Universidad Nacional de General San Martín
institution_str I-78
repository_str R-216
collection Repositorio Institucional de la UNSAM
language Inglés
topic CITRATE SYNTHESIS
IRON DOPED CERIA
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION
RAMAN SPECTROSCOPY
CIENCIAS QUÍMICAS
CIENCIAS NATURALES Y EXACTAS
spellingShingle CITRATE SYNTHESIS
IRON DOPED CERIA
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION
RAMAN SPECTROSCOPY
CIENCIAS QUÍMICAS
CIENCIAS NATURALES Y EXACTAS
Mazan, Mariano Osvaldo
Craievich, Aldo F.
Halac, Emilia Beatriz
Fantini, Márcia C. A.
Lamas, Diego Germán
Larrondo, Susana Adelina
Structural and morphological properties of Ce(1−x)FexO2−δ synthesized by citrate route
topic_facet CITRATE SYNTHESIS
IRON DOPED CERIA
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION
RAMAN SPECTROSCOPY
CIENCIAS QUÍMICAS
CIENCIAS NATURALES Y EXACTAS
description Cerium-based materials were intensively studied in last years because of their high oxygen storage capacity (OSC) associated to the reversible Ce4+ Ce3+ process and their properties closely related to the defect chemistry that could be adjusted by adequate selection of dopant. Fe3+ cation, due to its effective ionic radius smaller than that of Ce4+, is an interesting doping agent. In this work we present the synthesis and characterization of Ce(1-x)FexO2-δ mixed oxides (0<x<1) synthesized by the so named ?citrate method?. Our X-ray diffraction results suggest a rather strong dependence of lattice parameter on nanocrystal size, while Raman spectroscopy evidenced the formation of a small volume fraction of hematite clusters in samples with relatively high iron content, x>0.15, not observable in X-ray diffraction experiments. The solidsolutions exhibit high porosity and specific surface area, with nearly 10% of pore volume in the micropore size range, making these materials potentially useful for applications in catalysis.
format publishedVersion
Artículo
Artículo
author Mazan, Mariano Osvaldo
Craievich, Aldo F.
Halac, Emilia Beatriz
Fantini, Márcia C. A.
Lamas, Diego Germán
Larrondo, Susana Adelina
author_facet Mazan, Mariano Osvaldo
Craievich, Aldo F.
Halac, Emilia Beatriz
Fantini, Márcia C. A.
Lamas, Diego Germán
Larrondo, Susana Adelina
author_sort Mazan, Mariano Osvaldo
title Structural and morphological properties of Ce(1−x)FexO2−δ synthesized by citrate route
title_short Structural and morphological properties of Ce(1−x)FexO2−δ synthesized by citrate route
title_full Structural and morphological properties of Ce(1−x)FexO2−δ synthesized by citrate route
title_fullStr Structural and morphological properties of Ce(1−x)FexO2−δ synthesized by citrate route
title_full_unstemmed Structural and morphological properties of Ce(1−x)FexO2−δ synthesized by citrate route
title_sort structural and morphological properties of ce(1−x)fexo2−δ synthesized by citrate route
publisher Elsevier
publishDate 2015
url https://ri.unsam.edu.ar/handle/123456789/950
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