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Proceedings Paper

Photocatalytic activity of porous anatase layers monitored with the linear optical response
Author(s): Vladimir Ya. Gayvoronsky; A. Galas; Dmitry Y. Manko; Sergei I. Lysenko; I. Petrik; N. Smirnova; A. Eremenko; Thomas Dittrich; O. Loginenko; Fred Koch
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Paper Abstract

The photocatalytic activity of different porous layers of anatase nanocomposites has been monitored by measuring changes of the optical response of Rhodamine 6G water solution under UV irradiation in the presence of anatase films. We have produced series of porous anatase films with different methods to investigate their photocatalytic activity and its dependence on the parameters of the layers. Integrated sphere transmission and reflection spectra (200 - 1000 nm) with 3D angular resolved light scattering data gave a possibility to estimate the correct intrinsic absorption coefficient, the dispersion of the refractive index, the porosity (32 - 39%) and the thickness (90 - 1340 nm) of the samples. We have estimated the energy of the optical band-gap for both direct (3.66 - 4 eV) and indirect (3.33 - 3.4 eV) transitions. It has been shown that the photocatalytic activity depends sensitively on the nanopores which is determined by the molecular weights of pore agents.

Paper Details

Date Published: 3 December 2003
PDF: 9 pages
Proc. SPIE 5257, Ninth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, (3 December 2003); doi: 10.1117/12.545843
Show Author Affiliations
Vladimir Ya. Gayvoronsky, Institute of Physics (Ukraine)
A. Galas, Institute of Physics (Ukraine)
Dmitry Y. Manko, Institute of Physics (Ukraine)
Sergei I. Lysenko, Institute of Physics (Ukraine)
I. Petrik, Institute of Surface Chemistry (Ukraine)
N. Smirnova, Institute of Surface Chemistry (Ukraine)
A. Eremenko, Institute of Surface Chemistry (Ukraine)
Thomas Dittrich, Technical Univ. of Munich (Germany)
O. Loginenko, Technical Univ. of Munich (Germany)
Fred Koch, Technical Univ. of Munich (Germany)


Published in SPIE Proceedings Vol. 5257:
Ninth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals
Gertruda V. Klimusheva; Andrey G. Iljin; Sergey A. Kostyukevych, Editor(s)

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