Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
27748 | Journal of Photochemistry and Photobiology A: Chemistry | 2009 | 5 Pages |
Abstract
We have discovered that Cu2+-loaded TiO2 films (1.5 μm thick) exhibit a high activity of selective reduction of NO2 to NO in air under UV light illumination (1 mW cm−2). This effect is associated with a reduced NO oxidation to HNO3. For an increasing amount of Cu2+ ions the NO reductions become more stable. Cu2+ ions are responsible for the high redox property, playing an important role in adsorption of NO2/NO2−, electron transfer from the TiO2 to NO2/NO2−, and recombination center for positive holes.
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Authors
Yoshihisa Ohko, Hiroshi Noguchi, Yuri Nakamura, Nobuaki Negishi, Koji Takeuchi,