Abstract
Ultraviolet light was used to irradiate hydrocarbons onTiO2 thin film in high-resolution transmission electron microscopy (TEM). The hydrocarbon wasdecomposed by photocatalysis of titanium oxide. Reaction processes were studied by usingan in situ TEM observation system which was newly constructed for the present study. Formeasuring photocatalytic activities, electron energy loss spectroscopy (EELS)was used. We developed a new TEM method for observing crystal structures ofTiO2 and quantifying photocatalytic activities concurrently. We succeededin measuring the photodecomposition activity of hydrocarbons onTiO2 films in a submicron area. The spatial resolutions of the present method werecompared with those of other methods for measuring photocatalytic activity.
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