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Raman study of photo‐induced degradation of the Ru(II) complex adsorbed on nanocrystalline TiO 2 films
Author(s) -
Gao Kun,
Wang DeLiang
Publication year - 2007
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200600086
Subject(s) - anatase , raman spectroscopy , degradation (telecommunications) , nanocrystalline material , monolayer , rutile , photochemistry , materials science , raman scattering , adsorption , chemical engineering , thin film , chemistry , nanotechnology , photocatalysis , optics , catalysis , organic chemistry , telecommunications , physics , engineering , computer science
Photo‐induced degradation of a monolayer of the Ru(II) complex adsorbed on anatase TiO 2 thin films was studied by using resonant micro‐Raman spectroscopy. We developed two contrastive experiments to analyze the degradation mechanism. An exponential decay law was found when the dye was irradiated in the absence of a reducing agent. While the sensitized TiO 2 thin film electrode was covered by the I – /I 3 – redox couple, the dye degradation exhibited a slowed linear decay. The experimental result was compared and the degradation mechanism was analyzed. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)