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논문 기본 정보

자료유형
학술저널
저자정보
Maver, Ksenija (Laboratory for Environmental Research, University of Nova Gorica) Stangar, Urska Lavrencic (Laboratory for Environmental Research, University of Nova Gorica) Cernigoj, Urh (Laboratory for Environmental Research, University of Nova Gorica) Gross, Silvia (CNR-ISTM, Dipartimento di Scienze Chimiche, Universita degli Studi di Padova, and INSTM) Korosec, Romana Cerc (Faculty of Chemistry and Chemical Technology, University of Ljubljana)
저널정보
한국광과학회 Photochemical & photobiological sciences : an international journal Photochemical & photobiological sciences : an international journal 제8권 제5호
발행연도
2009.1
수록면
657 - 662 (6page)

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Transparent $TiO_2$ and $TiO_2-ZrO_2$ (molar ratio Zr/Ti = 0.1) thin films were produced by low-temperature sol-gel processing from nanocrystalline aqueous based solutions. The structural features and compositions of the films treated at room temperature, $100^{\circ}C$ and $500^{\circ}C$ were investigated by X-ray diffraction, X-ray photoelectron spectroscopy and thermal analysis. Addition of zirconia increased specific surface area ($140-230\;m^2\;g^{-1}$) and hindered the growth of anatase crystallites, exhibiting a constant size of 6-7 nm in the whole temperature range. These significant changes with respect to pure $TiO_2$ in anatase crystalline form did not result in significantly and systematically different photocatalytic activity, which was evaluated in terms of aqueous pollutant degradation (azo-dye in water) and self-cleaning ability (fatty contaminant deposit). The films treated at only $100^{\circ}C$ showed excellent photocatalytic activity towards azo-dye degradation. Contact angle measurements of aged and contaminated surfaces revealed a fast or sharp hydrophilicity gain under UVA illumination. Accordingly, the results of this study confirmed the potential application of advantageous low-temperature films in water treatment as well as for self-cleaning surfaces.

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