Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria
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 o...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_19327447_v113_n25_p10853_Jobbagy |
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todo:paper_19327447_v113_n25_p10853_Jobbagy2023-10-03T16:35:48Z Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria Jobbágy, M. Sorbello, C. Sileo, E.E. 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 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. Fil:Jobbágy, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Sileo, E.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_19327447_v113_n25_p10853_Jobbagy |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 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 |
| topic_facet |
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 |
| description |
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. |
| format |
JOUR |
| author |
Jobbágy, M. Sorbello, C. Sileo, E.E. |
| author_facet |
Jobbágy, M. Sorbello, C. Sileo, E.E. |
| author_sort |
Jobbágy, M. |
| title |
Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria |
| title_short |
Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria |
| title_full |
Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria |
| title_fullStr |
Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria |
| title_full_unstemmed |
Crystalline ce(III)-la(III) double basic carbonates: A chemical shortcut to obtain nanometric la(III)-doped ceria |
| title_sort |
crystalline ce(iii)-la(iii) double basic carbonates: a chemical shortcut to obtain nanometric la(iii)-doped ceria |
| url |
http://hdl.handle.net/20.500.12110/paper_19327447_v113_n25_p10853_Jobbagy |
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