Chem. Phys. Lett.,493, (4-6), 292-295 ( 2010).
Direct Detection of OH Radicals in the Gas-Phase Diffused from the Pt/TiO2 and WO3/TiO2 Photocatalysts under the UV Light Irradiation.
Yoshinori Murakami1, Ikki Ohta, Tsutomu Hirakawa2, Yoshio Nosaka (1: Nagaoka Institute of Technology,2:National Institute of Advanced Industrial Science and Technology)
(Abstract)
Direct detection of OH radicals diffused in the gas phase from the UV-irradiated Pt/TiO2 and WO3/TiO2 photocatalytic powders have been performed using the laser induced fluorescence technique. Although the OH-LIF intensities for the Pt/TiO2 photocatalytic powders increased with increasing amount of Pt, the OH-LIF intensities for WO3/TiO2 photocatalytic powders decreased monotonically with increasing the amount of WO3. Based on these experimental results a mechanism of OH-radical formation from the UV-irradiated Pt/TiO2 and WO3/TiO2 photocatalytic powders was discussed.
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