Influence of Zr as TiO2 doping ion on photocatalytic degradation of 4-chlorophenol

0081416 - ÚACH 2007 RIV NL eng J - Journal Article
Lukáč, Jozef - Klementová, Mariana - Bezdička, Petr - Bakardjieva, Snejana - Šubrt, Jan - Szatmáry, Lórant - Bastl, Zdeněk - Jirkovský, Jaromír
Influence of Zr as TiO2 doping ion on photocatalytic degradation of 4-chlorophenol.
[Vliv Zr jako TiO2 dopovacího iontu na fotokatalytickou degradaci 4-chlorofenolu.]
Applied Catalysis B - Environmental. Roč. 74, - (2007), s. 83-91. ISSN 0926-3373. E-ISSN 1873-3883
R&D Projects: GA MŠMT 1M0577
Institutional research plan: CEZ:AV0Z40320502; CEZ:AV0Z40400503
Keywords : Zr-doped TiO2 * anatase * rutile
Subject RIV: CA - Inorganic Chemistry
Impact factor: 4.651, year: 2007

Nanosized Zr-doped TiO2 photocatalysts were prepared using the homogenous co-precipitation method from aqueous solutions containing TiOSO4 and ZrCl4 by urea as a precipitation agent, with subsequently annealing at various temperatures of 400–1100 °C. Structural changes of the photocatalysts upon heating were studied by X-ray powder diffraction. Anatase-to-rutile phase transformation is shifted to higher temperatures in comparison with undoped TiO2. Spherical clusters morphology was revealed by scanning electron microscopy. Energy dispersive X-ray spectrometry confirmed a Zr content of 0.8 mol% in all samples. The spectral thresholds are shifted toward visible region, except for the unheated catalyst. Photocatalytic degradation of 4-chlorophenol was employed to test photoactivity of the catalyst. The photocatalyst annealed at 900 °C has a 1.5 times higher degradation rate than the standard TiO2 P25 (Degussa).

Na přípravu Zr dopovaného TiO2 bylo použito homogenní spolusrážení TiOSO4 a ZrCl4. Jako srážecí činidlo byla použita močovina. Připravený fotokatalyzátor s obsahem 0.8 mol% Zr ve struktuře TiO2 byl zahřát na 900 C a produkt byl dále použit pro fotokatalytickou degradaci 4-chlorfenolu. Rychlostní konstanta je 1.5 násobně vyšší než pro Degussu P25.
Permanent Link: http://hdl.handle.net/11104/0145287