Direct Detection of OH Radicals Diffused to the Gas Phase from the UV-Irradiated Photocatalytic TiO2 Surfaces by Means of Laser-Induced Fluorescence Spectroscopy

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...

Full description

Saved in:
Bibliographic Details
Published in:The journal of physical chemistry. B 2006-08, Vol.110 (34), p.16808-16811
Main Authors: Murakami, Yoshinori, Kenji, Endo, Nosaka, Atsuko Y, Nosaka, Yoshio
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp063293c