Study of photocatalytic effect of narrow band irradiation at 206 and 282 nm on oil in aqueous solution using TiO_2

摘要

Kinetics of oil water solutions photodegradation under action of narrow band irradiation of XeBr~*-excilamp (λ ～283 nm) and iodine lamp (λ =206 nm) is presented. Power of lamps reached 10 mW/cm~2. In all experiments TiO_2 (rutile) powder was used as a catalytic agent. Photocatalytic degradation kinetics was controlled by laser fluorescence spectrometer. The measuring complex was based on the pulse-repetitive Nd:YAG laser (266 nm) with Q-switching. Dependencies of fluorescence intensity on irradiation time were made using laser-induced fluorescence spectra. It has been found that at initial time of irradiation the photodegradation rate in oil aqueous solutions was higher in the case of XeBr~* lamp, however, after 20 minutes of irradiation, major photodegradation was observed in the both cases.