Artículos de revistas
Synthesis of Nb(2)O(5)center dot nH(2)O nanoparticles by water-in-oil microemulsion
Fecha
2010Registro en:
JOURNAL OF NON-CRYSTALLINE SOLIDS, v.356, n.3, p.125-128, 2010
0022-3093
10.1016/j.jnoncrysol.2009.11.002
Autor
RODRIGUES, Liana Alvares
SILVA, Maria Lucia Caetano Pinto da
Institución
Resumen
Hydrous niobium oxide (Nb(2)O(5)center dot nH(2)O) nanoparticles had been Successfully prepared by water-in-oil microemulsion. They were characterized by X-ray diffraction (XRD), thermal analysis (TG/DTG), Fourier transform infrared spectroscopy (FTIR), BET surface area measurement, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results showed that the nanoparticle was exactly Nb(2)O(5)center dot nH(2)O with spherical shape. Their BET surface area was 60 m(2) g(-1). XRD results showed that Nb(2)O(5)center dot nH(2)O nanoparticles with crystallite size in nanometer scale were formed. The crystallinity and crystallity size increased with increasing annealing temperature. TT-phase of Nb(2)O(5) was obtained when the sample is annealed at 550 degrees C. (C) 2009 Elsevier B.V. All rights reserved.