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Influence of mineralizer agents on the growth of crystalline CeO2 nanospheres by the microwave-hydrothermal method by R.C. Deus; M. Cilense; C.R. Foschini; M.A. Ramirez; E. Longo; A.Z. Simões is a Materials Science article available to read on EtoBox.

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Cystalline ceria (CeO 2 ) nanoparticles have been synthesized by a simple and fast microwave-assisted hydrothermal (MAH) under NaOH, KOH, and NH 4 OH mineralizers added to a cerium ammonium nitrate aqueous solution. The products were characterized by X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier Transformed-IR and Raman spectroscopies. Rietveld refinement reveals a cubic structure with a space group Fm3m while infrared data showed few traces of nitrates. Field emission scanning microcopy (FEG-SEM) revealed a homogeneous size distribution of nanometric CeO 2 nanoparticles. The MAH process in KOH and NaOH showed most effective to dehydrate the adsorbed water and decrease the hydrogen bonding effect leaving a weakly agglomerated powder of hydrated ceria. TEM micrographs of CeO 2 synthesized under MAH conditions reveal particles well-dispersed and homogeneously distributed. The MAH enabled cerium oxide to be synthesized at 100 °C for 8 min.

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Author

R.C. Deus; M. Cilense; C.R. Foschini; M.A. Ramirez; E. Longo; A.Z. Simões

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0925-8388)

Published

2013

Language

EN

Field

Materials Science (Physical Sciences)