Photocatalytic properties of different TiO2 thin films of various porosity and titania loading

0358405 - ÚFCH JH 2012 RIV NL eng J - Journal Article
Zita, J. - Krýsa, J. - Černigoj, U. - Lavrenčič-Štangar, U. - Jirkovský, Jaromír - Rathouský, Jiří
Photocatalytic properties of different TiO2 thin films of various porosity and titania loading.
Catalysis Today. Roč. 161, č. 1 (2011), s. 29-34. ISSN 0920-5861. E-ISSN 1873-4308
R&D Projects: GA MŠMT 1M0577; GA ČR GA104/08/0435
Institutional research plan: CEZ:AV0Z40400503
Keywords : sol-gel * titanium dioxide film * porosity
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 3.407, year: 2011

Thin sol-gel titania films with varying porosity but constant mass were coated on SiO2/glass substrate. The mass was kept constant by changing the withdrawal rate of dipping from a titania sol. The porosity properties of the films were determined by the analysis of adsorption isotherms of Kr at ca 77 K. Photocatalytic performance of TiO2 layers in the degradation of Acid orange 7 (AO7) and 4-chlorophenol (4CP) in aqueous solution depends on the mass of titania but not on the porosity/surface area of the films. On the contrary, in the degradation of thin layers of Resazurin (Rz) ink and methyl stearate (MS) deposited on the TiO2 film surface, the activity of the films is clearly enhanced due to the porosity but does not depend on titania mass itself.
Permanent Link: http://hdl.handle.net/11104/0196464