Abstract
We have discovered that Cu 2+-loaded TiO 2 films (1.5 μm thick) exhibit a high activity of selective reduction of NO 2 to NO in air under UV light illumination (1 mW cm −2). This effect is associated with a reduced NO oxidation to HNO 3. For an increasing amount of Cu 2+ ions the NO reductions become more stable. Cu 2+ ions are responsible for the high redox property, playing an important role in adsorption of NO 2/NO 2 −, electron transfer from the TiO 2 to NO 2/NO 2 −, and recombination center for positive holes.
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Schedule a callMore From: Journal of Photochemistry & Photobiology, A: Chemistry
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