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  • 1 Universidade de São Paulo Instituto de Química CP 26077 Sao Paulo SP 05513-970 Brazil
  • 2 Universidade Federal de São Paulo Departamento de Ciências Exatas e da Terra Sao Paulo SP Brazil
  • 3 Universidade de São Paulo Instituto de Geociências Sao Paulo SP Brazil
  • 4 Universidade de São Paulo Departamento de Física Aplicada, Instituto de Física Sao Paulo SP Brazil
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Abstract

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 N2 adsorption isotherms. SEM microscopy analysis showed that the calcination of crystalline fibrous precursors [Ln2(LH)3·2H2O] (L = citrate) originated fibrous shaped particles. On the other hand, the calcination of irregular shaped particles of precursors [LnL·xH2O] originated irregular shaped particles of oxide, pointing out a morphological template effect of precursors on the formation of the respective oxides.

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