Mesoporous and dense sol-gel titania films have been synthesized and processed in similar conditions to make a comparative study of crystallization to anatase in porous and dense samples. We have performed a correlative analysis combining THz spectroscopy with synchrotron radiation, variable angle incidence infrared spectroscopy, spectroscopic ellipsometry and grazing incidence X-ray diffraction to characterize the structure of titania films as a function of thermal processing conditions. THz spectra have shown that small anatase crystalline clusters are already present in the as-deposited samples, and both crystallization and growth process are favored in the mesoporous films. Moreover, the analysis by X-ray diffraction and variable angle incidence infrared spectroscopy has allowed identification of the presence of small textures in the samples.

INNOCENZI P, MALFATTI L, KIDCHOB T, ENZO S, DELLA VENTURA G, SCHADED U, et al. (2010). Crystallization of sol-gel and mesoporous anatase titania films studied by THz spectroscopy. JOURNAL OF PHYSICAL CHEMISTRY. C, 114, 22385-22391 [10.1021/jp1042766].

Crystallization of sol-gel and mesoporous anatase titania films studied by THz spectroscopy

DELLA VENTURA, Giancarlo;
2010

Abstract

Mesoporous and dense sol-gel titania films have been synthesized and processed in similar conditions to make a comparative study of crystallization to anatase in porous and dense samples. We have performed a correlative analysis combining THz spectroscopy with synchrotron radiation, variable angle incidence infrared spectroscopy, spectroscopic ellipsometry and grazing incidence X-ray diffraction to characterize the structure of titania films as a function of thermal processing conditions. THz spectra have shown that small anatase crystalline clusters are already present in the as-deposited samples, and both crystallization and growth process are favored in the mesoporous films. Moreover, the analysis by X-ray diffraction and variable angle incidence infrared spectroscopy has allowed identification of the presence of small textures in the samples.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11590/123601
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