Spectroscopic investigation of the mechanism of photocatalysis

Reaction mechanisms of various kinds of photocatalysts have been reviewed based on the recent reports, in which various spectroscopic techniques including luminol chemiluminescence photometry, fluorescence probe method, electron spin resonance (ESR), and nuclear magnetic resonance (NMR) spectroscopy...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2014-11, Vol.19 (11), p.18248-18267
Main Authors: Nosaka, Yoshio, Nishikawa, Masami, Nosaka, Atsuko Y
Format: Article
Language:English
Subjects:
acetaldehyde
amino acids
ESR
glutathione
H2O2
metal doped TiO2
Metals, Heavy - chemistry
NMR
OH radical
Oxides - chemistry
Photochemical Processes
Reactive Oxygen Species - chemistry
Review
Spectrum Analysis - methods
superoxide radical
visible-light responsive photocatalysts
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Summary:Reaction mechanisms of various kinds of photocatalysts have been reviewed based on the recent reports, in which various spectroscopic techniques including luminol chemiluminescence photometry, fluorescence probe method, electron spin resonance (ESR), and nuclear magnetic resonance (NMR) spectroscopy were applied. The reaction mechanisms elucidated for bare and modified TiO2 were described individually. The modified visible light responsive TiO2 photocatalysts, i.e., Fe(III)-deposited metal-doped TiO2 and platinum complex-deposited TiO2, were studied by detecting paramagnetic species with ESR, •O2- (or H2O2) with chemiluminescence photometry, and OH radicals with a fluorescence probe method. For bare TiO2, the difference in the oxidation mechanism for the different crystalline form was investigated by the fluorescence probe method, while the adsorption and decomposition behaviors of several amino acids and peptides were investigated by 1H-NMR spectroscopy.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules191118248