Photostimulated oxygen isotope exchange between N18O and anatase TiO2 under light irradiation

An EPR characterisation of stable and transient reactive oxygen species formed under radiative and non-radiative conditions

“…The choice between the two previous explanations can be made after careful consideration of the outermost hyperfine lines arising from the doubly labelled 17 O 17 O − species. Figure 3 gives a schematic illustration of the multiplet patterns that can (1) The observation of oxygen isotopic exchange (OIE) over the MoO 3 /SiO 2 surface is in agreement with previous reports on other oxides [27][28][29][30][31]. Indeed, the study of OIE is an effective way for understanding the reactivity of oxygen species on oxide surfaces but has previously been observed to involve exchange of surface oxygen atoms with atoms in the gas phase, via Eqs.…”

Gaseous Photocatalytic Oxidation of Formic Acid over TiO2: A Comparison between the Charge Carrier Transfer and Light-Assisted Mars–van Krevelen Pathways

“…Many works have studied this light-assisted lattice oxygen extraction and its role in TiO 2 photocatalysis under anaerobic conditions. Isotope experiments have shown that TiO 2 lattice oxygens could be extracted upon UV light irradiation; − this was reported to have contribution to the photocatalysis of formic acid, acetic acid, and benzene in the absence of O 2 . ,, Direct participation of bridging lattice oxygens of TiO 2 in water photocatalysis and benzene aqueous photocatalysis was also proposed using Ti 18 O 2 as a photocatalyst. , Furthermore, under anaerobic conditions, direct involvement of bridging lattice oxygens in gaseous acetaldehyde photocatalytic oxidation on the anatase surface was observed by isotopic studies . Under an ultrahigh vacuum condition, the photoinduced extraction of lattice oxygens from TiO 2 by organics was also observed .…”