The mechanism of the photocatalytic degradation of oleic acid on efficient self-cleaning surfaces

0369164 - ÚFCH JH 2012 RIV CN eng C - Conference Paper (international conference)
Rathouský, Jiří - Kalousek, Vít - Jirkovský, Jaromír
The mechanism of the photocatalytic degradation of oleic acid on efficient self-cleaning surfaces.
Proceedings 2011 World Congress on Engineering and Technology. Shanghai: IEEE, 2011, s. 0981-1948701. ISBN 978-1-61284-363-6.
[2011 World Congress on Engineering and Technology. Shanghai (CN), 28.10.2011-02.11.2011]
R&D Projects: GA MK(CZ) DF11P01OVV012
Keywords : TiO2 * photocatalysis * mesoporous layers
Subject RIV: CF - Physical ; Theoretical Chemistry

Thin films of titanium dioxide exhibiting developed mesoporosity with large surface area and pores ca 10 nm in size were shown efficient photocatalysts in the decomposition of thin layers of oleic acid deposited on their surface. The pore walls of these films were composed of small anatase nanocrystals and some amorphous phase. Nonanal and 9-oxononanoic acid were identified as major intermediates of the oleic acid decomposition, while azelaic and nonanoic acids represented minor ones. These compounds corresponded with the products of a simulated oxidative degradation of cis-3-hexenoic acid computed by means of quantum chemistry. Cis-3-hexenoic acid was chosen as a simplified model of oleic acid having similar but reduced structure, which enabled to perform the theoretical study with a reasonable consumption of computation time. The simulated oxidative degradation of cis-3-hexenoic acid was induced by an attack of hydroxyl radical on the C=C double bond.
Permanent Link: http://hdl.handle.net/11104/0203297