TY - JOUR
T1 - Photoinitiated reactions of 2,4,6 TCP on degussa P25 formulation TiO 2
T2 - Wavelength-sensitive decomposition
AU - Hurum, Deanna C.
AU - Gray, Kimberly A
AU - Rajh, Tijana
AU - Thurnauer, Marion C.
PY - 2004/10/21
Y1 - 2004/10/21
N2 - The photoinitiated oxidative reactions of 2,4,6 trichlorophenol (2,4,6 TCP) and 2,4,5 trichlorophenol (2,4,5 TCP) are studied on the titania photocatalyst Degussa P25. On this catalyst 2,4,6 TCP is used to confirm two distinct oxidative mechanisms that are triggered at different light-excitation wavelengths. A charge-transfer mechanism occurs at sub-bandgap energies of the photocatalyst leading to a phenoxyl radical product and an oxidative mechanism occurs at the bandgap leading to a semiquinone radical product. The wavelength dependence of these two mechanisms is discussed.
AB - The photoinitiated oxidative reactions of 2,4,6 trichlorophenol (2,4,6 TCP) and 2,4,5 trichlorophenol (2,4,5 TCP) are studied on the titania photocatalyst Degussa P25. On this catalyst 2,4,6 TCP is used to confirm two distinct oxidative mechanisms that are triggered at different light-excitation wavelengths. A charge-transfer mechanism occurs at sub-bandgap energies of the photocatalyst leading to a phenoxyl radical product and an oxidative mechanism occurs at the bandgap leading to a semiquinone radical product. The wavelength dependence of these two mechanisms is discussed.
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U2 - 10.1021/jp047097m
DO - 10.1021/jp047097m
M3 - Article
AN - SCOPUS:7544237637
SN - 1520-6106
VL - 108
SP - 16483
EP - 16487
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
IS - 42
ER -