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Crystallization of Zr0.1Ti0.9On mixed oxide by pressurized hot water and its effect on microstructural properties and photoactivity
Authors: Lang Jaroslav | Matejova Lenka | Matej Zdenek | Čapek Libor | Svoboda Ladislav
Year: 2018
Type of publication: článek v odborném periodiku
Name of source: Journal of Supercritical Fluids
Publisher name: Elsevier Science BV
Place: Amsterdam
Page from-to: 39-48
Titles:
Language Name Abstract Keywords
cze Krystalizace směsného oxidu Zr0,1Ti0,9On pomocí tlakové horké vody a její efetk na mikrostrukturní vlastnosti a fotoaktivitu Krystalizace působením stlačené horké vody byla aplikována a optimalizována pro přípravu fotoaktivního směsného oxidu Zr0,1Ti0,9On. Vliv podmínek procesu přípravy na mikrostrukturu, texturu, optické, elektronické a fotokatalytické vlastnosti byl testován. TiO2-ZrO2; směsný oxid; stlačená horká voda; subkritická voda; krystalizace; fotoaktivita
eng Crystallization of Zr0.1Ti0.9On mixed oxide by pressurized hot water and its effect on microstructural properties and photoactivity Pressurized hot water crystallization was applied and optimized for preparation of photoactive Zr0.1Ti0.9On mixed oxide. The effect of individual processing conditions (temperature, pressure and water amount) on (micro)structure, textural, optical, electronic and photocatalytic properties in Acid orange 7 photodegradation of prepared Zr0.1Ti0.9On mixed oxide was examined. It was revealed that while the processing temperature had crucial effect on crystallization of Zr0.1Ti0.9On mixed oxide and anatase crystallites growth, the volume of water and pressure did not show any effect. Nevertheless, it was found that pressure as well as temperature had strong influence on formation of anatase lattice defects of different type and amount and led to changes in mixed oxide photoactivity. The optimal processing conditions leading to the most photoactive Zr0.1Ti0.9Ox mixed oxide were determined to be 2L of water, 250 degrees C and 10 MPa. Titania-zirconia mixed oxide; Pressurized hot water; Subcritical water; Crystallization; Photoactivity