Artículos de revistas
The role of citrate precursors on the morphology of lanthanide oxides obtained by thermal decomposition
Fecha
2010Registro en:
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, v.99, n.2, p.385-390, 2010
1388-6150
10.1007/s10973-009-0380-1
Autor
Silva, Mauro Francisco Pinheiro da
Carvalho, Flavio Machado de Souza
Martins, Tereza da Silva
Fantini, Marcia Carvalho de Abreu
Isolani, Paulo Celso
Institución
Resumen
Two series of lanthanide oxides with different morphologies were synthesized through calcinations of two types of citrate polymeric precursors. These oxides were characterized by XRD patterns, SEM electronic microscopy, and N(2) adsorption isotherms. SEM microscopy analysis showed that the calcination of crystalline fibrous precursors [Ln(2)(LH)(3)center dot 2H(2)O] (L = citrate) originated fibrous shaped particles. On the other hand, the calcination of irregular shaped particles of precursors [LnL center dot xH(2)O] originated irregular shaped particles of oxide, pointing out a morphological template effect of precursors on the formation of the respective oxides.