The effect of pretreatment temperature on the u.v. photo-adsorption of O2 on TiO2 has been studied by e.p.r. Different oxygen species are found if the sample is completely hydroxylated or strongly dehydroxylated, this being related to two different photo-adsorption mechanisms. O2H· and V-centres are found for the hydrated samples and O–2, O–3 O3–3 for the dehydroxylated samples. The origin of all these species is discussed.
No takes yet. Share an insight, caveat, or question.
González-Elipe et al. (1979) studied this question.