Direct detection of OH radicals diffused to the gas phase from the UV-irradiated photocatalytic TiO2 surfaces by means of laser-induced fluorescence spectroscopy

被引：88
|
作者：
Murakami, Yoshinori [1 ]
Kenji, Endo [1 ]
Nosaka, Atsuko Y. [1 ]
Nosaka, Yoshio [1 ]
机构：
[1] Nagaoka Univ Technol, Dept Chem, Nagaoka, Niigata 9402188, Japan
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 34期
关键词：
D O I：
10.1021/jp063293c
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The important roles of OH radicals for remote oxidation using TiO2 photocatalysts were evidenced by the in situ detection of OH radicals in the gas phase using the laser-induced fluorescence (LIF) technique. The appearance of OD-LIF intensities after the exposure of D2O vapors over TiO2 powders and the decrease of the time-resolved signals of OH-LIF intensities with increasing calcined temperatures of TiO2 powders suggested that the exchangeable water at the TiO2 surface is the origin of the diffused OH radicals.
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收藏
页码：16808 / 16811
页数：4
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