Artículos de revistas
Anisotropic growth of oxide nanocrystals: Insights into the rutile TiO2 phase
Fecha
2007-04-26Registro en:
Journal of Physical Chemistry C. Washington: Amer Chemical Soc, v. 111, n. 16, p. 5871-5875, 2007.
1932-7447
10.1021/jp070051j
WOS:000245799100010
8498310891810082
Autor
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Universidade Federal de São Carlos (UFSCar)
Universidade de São Paulo (USP)
LNLS
Universidade Estadual Paulista (Unesp)
Institución
Resumen
In this work, we report the synthesis of titanium oxide nanocrystals, especially the rutile TiO2 phase with nanorod morphology, by a method based on peroxotitanium complex decomposition. The results indicate that the anisotropic morphology reported for rutile TiO2 nanocrystals is related to the oriented attachment process. Despite the predominance of rutile nanocrystals at longer treatment times, the nanocrystals were obtained also in the anatase type, according to the degradation time adopted. XANES results evidenced the absence of structural correlation between the peroxytitanium complex and phase evolution, and the coexistence of the two phases strongly suggests a correlation of the oriented attachment mechanism and the rutile phase stabilization.