Nanocomposites materials generated from a spray
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/04/2009
|
Resumo |
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The Spray Pyrolysis (SP) process has been employed at moderate temperature (470-970 K) for the synthesis of micro- and nano-particles of hydrated metal oxides and of related nanocomposites. It has been applied to iron nitrate solutions, without or with the addition of sodium chloride as a flux. After removal of the flux, nanocomposites of ferrihydrite (5Fe2O3,9H2O) / hematite (α- Fe2O3) / and an amorphous Fe2O3 are obtained, with surface area 140 m²/g. It has been applied also to a sol of Aluminum-tri-sec-butoxide, without or with activation by europium or terbium ions. Boehmite (γ-AlOOH) powders are synthesized at 470 K, with surface area equal to 180 m²/g. Transition alumina (γ-Al2O3) are synthesized at 970 K. Nanocomposites made by reaction of the boehmite or γ-Al2O3 particles with the amino acid asparagin (ASN) have been prepared and characterized. The luminescence of the Eu3+ or Tb3+ doped nanocomposites has been investigated: they can be considered as bio-compatible luminescent nanoparticles. |
Formato |
176-181 |
Identificador |
http://dx.doi.org/10.1590/S0103-97332009000200009 Brazilian Journal of Physics. Sociedade Brasileira de Física, v. 39, n. 1a, p. 176-181, 2009. 0103-9733 http://hdl.handle.net/11449/25990 10.1590/S0103-97332009000200009 S0103-97332009000200009 WOS:000267893800009 S0103-97332009000200009.pdf |
Idioma(s) |
eng |
Publicador |
Sociedade Brasileira de Física |
Relação |
Brazilian Journal of Physics |
Direitos |
openAccess |
Palavras-Chave | #Spray-pyrolysis #Nano-powders #Ferrihydrite #Hematite #Boehmite #Alumina |
Tipo |
info:eu-repo/semantics/article |