Photocatalytic Decomposition of N2O on Ag-TiO2

0364470 - ÚCHP 2012 RIV PL eng C - Conference Paper (international conference)
Kočí, K. - Krejčíková, Simona - Lacný, Z. - Šolcová, Olga - Obalová, L.
Photocatalytic Decomposition of N2O on Ag-TiO2.
Book of Abstracts. Kraków: Wydawnictwo Uniwersitetu Jagiellonskiego, 2011, s. 159-161. ISBN 978-83-233-3249-7.
[International Symposium on Nitrogen Oxides Emission Abatement NOEA 2011. Zakopane (PL), 04.09.2011-07.09.2011]
R&D Projects: GA ČR GD203/08/H032
Institutional research plan: CEZ:AV0Z40720504
Keywords : N2O2 * photocatalytic decomposition * Ag doping * TiO2
Subject RIV: CF - Physical ; Theoretical Chemistry
http://arl-repository.lib.cas.cz/nusl/UCHP-M/cav_un_epca-0364470_01.pdf

Catalysts with various Ag loading (0.7 – 5.2 wt%) in the powder form were prepared by the sol-gel process controlled in the reverse micellar environment. X-ray diffraction (XRD), nitrogen adsorption measurement, UV-Vis and elemental analysis were employed for characterization of catalysts. Effect of various silver loadings on photocatalytic activity of TiO2 catalysts in N2O photocatalytic decomposition was studied. Photocatalytic decomposition of N2O was performed in annular batch reactor illuminated with 8 W Hg lamp (254 nm wavelength). Reaction kinetic corresponds to first-order reaction rate which is in agreement with plausible reaction mechanisms. The highest N2O conversion of 77% after 24 hours was reach over TiO2 modified by 3.4 wt% Ag. The Ag metal clusters could provoke a decrease in the electron-hole recombination rate.
Permanent Link: http://hdl.handle.net/11104/0199950