Artigo
The role of citrate precursors on the morphology of lanthanide oxides obtained by thermal decomposition
Fecha
2010-02-01Registro en:
Journal of Thermal Analysis and Calorimetry. Dordrecht: Springer, v. 99, n. 2, p. 385-390, 2010.
1388-6150
10.1007/s10973-009-0380-1
WOS:000275657600003
Autor
Pinheiro da Silva, Mauro Francisco
Souza Carvalho, Flavio Machado de
Martins, Tereza da Silva [UNIFESP]
Abreu Fantini, Marcia Carvalho de
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.