Photoinduced Processes in Heterogeneous Gas-Solid Systems.Temperature Dependence and Modeling of 3 Surface Chemical Reaction on ZrO_2 Triggering Photophysical Events in the Solid

摘要

Chemisorpu'on of H-containing molecules,e.g.H_2,H_2O,RH and ROH,on pre-irradiated metal-oxide surfaces emit light following interaction of these molecules with photogenerated surface-active centers.Earlier we showed that this effect is also typical for adsorption of Hi on pre-irradiated powdered ZrO_2 (1,2).The fight pulse from the PhICL effect follows bi-exponential decay kinetics with the longer component corresponding to the decay of phosphorescence.PhICL emits photons in a broad spectral range with the maximum at ca.490 nm.The PhICL spectrum corresponds to the spectra of phosphorescence and thermo-stimulated luminescence (TSL) of ZrO_2.