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Influence of annealing temperature on structural and optical properties of mesoporous TiO2 thin films prepared by sol-gel templating technique
, Article Journal of Optoelectronics and Advanced Materials ; Volume 12, Issue 7 , 2010 , Pages 1490-1497 ; 14544164 (ISSN) ; Sadrnezhaad, S. K ; Sharif University of Technology
2010
Abstract
TiO2 thin films with mesoporous structure were deposited on quartz substrate by sol-gel dip coating. The structural, morphological and optical properties of the films were characterized by X-ray diffraction (XRD), simultaneous thermal analysis (STA), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), atomic force microscopy (AFM), transmission electron microscopy (TEM) and UV/Vis transmittance spectroscopy. Crystallization of the anatase phase was initiated at 300°C. Its transformation to the rutile phase occurred at 700°C. Anatase and rutile crystallites initially sized 3.2 and 15.3nm, respectively. The anatase phase was under tension; but the rutile phase was...