Multilayered ordered mesoporous platinum/titania composite films: does the photocatalytic activity benefit from the film thickness?

0369110 - ÚFCH JH 2012 RIV GB eng J - Journal Article
Ismail, A. A. - Bahnemann, D. - Rathouský, Jiří - Yarovyi, V. - Wark, M.
Multilayered ordered mesoporous platinum/titania composite films: does the photocatalytic activity benefit from the film thickness?
Journal of Materials Chemistry. Roč. 21, č. 21 (2011), s. 7802-7810. ISSN 0959-9428
Institutional research plan: CEZ:AV0Z40400503
Keywords : titanium dioxide films * TiO2 thin films * sol-gel method
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 5.968, year: 2011

Multilayered films of TiO(2) with ordered cubic mesoporosity were grown via layer-by-layer deposition on a conductive FTO (F-doped SnO(2)) substrate by dip-coating and subsequent calcination at 400 degrees C. Since platinum nanoparticles are known to enhance the photocatalytic activity, they were introduced into the TiO(2) mesopores by pulsed electrodeposition. Additionally, sandwich-like layers with up to five alternating TiO(2) and Pt layers were prepared. The photocatalytic gas-phase oxidation of acetaldehyde served as a test reaction to characterize the activity in the gas phase of both pristine TiO(2) as well as Pt/TiO(2) single-and multilayer films. The ordered mesoporous pristine TiO(2) and Pt/TiO(2) nanocomposites exhibited significantly higher photoactivity than commercial Pilkington Activ (TM) glass and dense TiO(2) films.
Permanent Link: http://hdl.handle.net/11104/0006734