Doping with hetero-elements provides a common and efficient way to sensitize wide-bandgap photocatalysts to visible light. It is important to know how the dopants positively affect catalytic performances. We have been studying photo-induced dynamics using time-resolved infrared (IR) absorption spectroscopy. Electrons are excited in a photocatalyst by pulsed light irradiation. The excited electrons exhibit the absorption of mid-IR light. The decay of the IR absorbance is related to the kinetics of electron-hole recombination in the bulk and electron-consuming reactions at the surface. In the current talk, the rate of electron-hole recombination is quantitatively compared with the steady-state rate of H2 production on doped NaTaO3. The identity of the initial state of IR absorbing transition is also discussed.
Mendeley saves you time finding and organizing research
There are no full text links
Choose a citation style from the tabs below