Abstract

Abstract Cu2+ ions supported onto SiO2 (Cu2+/SiO2) prepared by an ion-exchange method are reduced to Cu+ ions when the Cu2+/SiO2 sample is evacuated above 573 K. Cu+/SiO2 catalyst decomposes NO photocatalytically and stoichiometrically at 275 K. The excited state of the Cu+ ions plays a significant role in the photocatalytic decomposition of NO on the Cu+/SiO2 catalyst.

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