The role of citrate precursors on the morphology of lanthanide oxides obtained by thermal decomposition

Pinheiro da Silva, Mauro Francisco; Souza Carvalho, Flavio Machado de; Martins, Tereza da Silva [UNIFESP]; Abreu Fantini, Marcia Carvalho de; Isolani, Paulo Celso

The role of citrate precursors on the morphology of lanthanide oxides obtained by thermal decomposition

Data

2010-02-01

Autores

Pinheiro da Silva, Mauro Francisco

Souza Carvalho, Flavio Machado de

Martins, Tereza da Silva

Abreu Fantini, Marcia Carvalho de

Isolani, Paulo Celso

Tipo

Artigo

Resumo

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.

Citação

Journal of Thermal Analysis and Calorimetry. Dordrecht: Springer, v. 99, n. 2, p. 385-390, 2010.