Preparation and characterization of ceria nanospheres by microwave-hydrothermal method
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
15/12/2008
|
Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Crystalline ceria (CeO2) nanoparticles have been successfully synthesized by a simple and fast microwave-hydrothermal method at 130 degrees C for 20 min. As-synthesized CeO2 powders were calcinated at 500 degrees C for 1, 2 and 4 h. The products were characterized by thermogravimetric analysis (TG-DTA), X-ray powder diffraction (XRD), field-emission scanning electron microscopy/STEM mode (FEG/STEM), Fourier Transformed-IR and RAMAN spectroscopies. It is shown that synthesized ceria powders have a spherical shape with particle size below 10 nm, a narrow distribution and exhibit weak agglomeration. The FTIR spectrum of the ceria exhibits strong broad band below 700 cm(-1) which is due to the delta (Ce-O-C) mode. Raman spectrum is characterized by the presence of a very strong band to 464.5 cm(-1). The microwave-hydrothermal method enabled cerium compounds to be synthesized at low temperature and shorter time. (C) 2008 Elsevier B.V. All rights reserved. |
Formato |
4509-4511 |
Identificador |
http://dx.doi.org/10.1016/j.matlet.2008.08.011 Materials Letters. Amsterdam: Elsevier B.V., v. 62, n. 30, p. 4509-4511, 2008. 0167-577X http://hdl.handle.net/11449/41624 10.1016/j.matlet.2008.08.011 WOS:000260715800012 |
Idioma(s) |
eng |
Publicador |
Elsevier B.V. |
Relação |
Materials Letters |
Direitos |
closedAccess |
Palavras-Chave | #Ceramics #Nanomaterials #Characterization methods #Ceria #Microwave-hydrothermal method |
Tipo |
info:eu-repo/semantics/article |