Visible light-induced catalytic degradation of iprobenfos fungicide by poly(3-octylthiophene-2,5-diyl) film
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説明
Abstract Visible light-induced catalytic degradation of iprobenfos fungicide was investigated using poly(3-octylthiophene-2,5-diyl) (POTh) film by varying oxygen pressure of bubbling gases. The degradation rate increased with the increasing oxygen pressure and obeyed a first-order kinetics in bubbling air. Even after 10 h irradiation ( λ >380 nm), the film was substantially stable and no peeling was observed. The quenching of photoluminescence of POTh with O 2 was observed and the formation of active oxygen species such as H 2 O 2 and OH was detected spectrophotometrically. An OH adduct of iprobenfos as well as decomposed intermediates and SO 4 2− was also confirmed. The addition of Fe 2+ accelerated the photocatalytic degradation of iprobenfos by the POTh film. Based on these results, a photocatalytic degradation mechanism is proposed.
収録刊行物
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- Journal of Photochemistry and Photobiology A: Chemistry
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Journal of Photochemistry and Photobiology A: Chemistry 133 59-66, 2000-05-01
Elsevier BV