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Abstract:

The controlled decomposition of crystalline Ce 1-xLa x(OH)CO 3 samples to give nanocrystalline Ce 1-XLa xO 2δ solid solutions is studied as a function of temperature and La(III) content. The hexagonal basic carbonates, related to the mineral bastnaesite, are shown to be suitable precursors for the obtainment of Ce(IV-III), La(III) oxides when exposed to O 2 at mild temperatures (250 °C). The oxidation of Ce(III) centers triggers the massive decomposition of the whole precursor, acting as a chemical shortcut to achieve the domain of ceria phases, at temperatures 200 °C lower than the traditional procedures. The mixed oxides exhibit higher surface areas than those obtained for traditional coprecipitation-thermal decomposition procedures, achieving values in the range of those oxides prepared by costly surfactant-assisted methods. © 2009 American Chemical Society.

Registro:

Documento: Artículo
Título:Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria
Autor:Jobbágy, M.; Sorbello, C.; Sileo, E.E.
Filiación:DQIAQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, C1428EHA-Buenos Aires, Argentina
INQUlMAE, CONICET, Argentina
Centro Interdisciplinario de Nanociencia y Nanotecnología, Argentina
Palabras clave:Bastnaesite; Doped ceria; Mild temperatures; Mixed oxide; Nanocrystalline; Nanometric; Surface area; Surfactant-assisted method; Thermal decompositions; Carbonates; Cerium; Crystalline materials; Lanthanum; Mining; Oxides; Precipitation (chemical); Pyrolysis; Surface active agents; Cerium compounds
Año:2009
Volumen:113
Número:25
Página de inicio:10853
Página de fin:10857
DOI: http://dx.doi.org/10.1021/jp810321y
Título revista:Journal of Physical Chemistry C
Título revista abreviado:J. Phys. Chem. C
ISSN:19327447
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19327447_v113_n25_p10853_Jobbagy

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Citas:

---------- APA ----------
Jobbágy, M., Sorbello, C. & Sileo, E.E. (2009) . Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria. Journal of Physical Chemistry C, 113(25), 10853-10857.
http://dx.doi.org/10.1021/jp810321y
---------- CHICAGO ----------
Jobbágy, M., Sorbello, C., Sileo, E.E. "Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria" . Journal of Physical Chemistry C 113, no. 25 (2009) : 10853-10857.
http://dx.doi.org/10.1021/jp810321y
---------- MLA ----------
Jobbágy, M., Sorbello, C., Sileo, E.E. "Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria" . Journal of Physical Chemistry C, vol. 113, no. 25, 2009, pp. 10853-10857.
http://dx.doi.org/10.1021/jp810321y
---------- VANCOUVER ----------
Jobbágy, M., Sorbello, C., Sileo, E.E. Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria. J. Phys. Chem. C. 2009;113(25):10853-10857.
http://dx.doi.org/10.1021/jp810321y