کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4754223 1417608 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Decomposition of dimethyl phthalate in aqueous solution by UV-LED/TiO2 process under periodic illumination
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Decomposition of dimethyl phthalate in aqueous solution by UV-LED/TiO2 process under periodic illumination
چکیده انگلیسی
The effect of controlled periodic illumination on the photonic efficiency and temporal decomposition behavior of dimethyl phthalates (DMP) in aqueous solution by UV-LED/TiO2 process was investigated in this study. For experiments conducted with the same total illumination time, the decomposition of DMP was enhanced with increasing dark period possibly ascribed to the enhancement of surface replenishment and the inhibition of electron-hole recombination. The existence of oxygen molecules might be beneficial for replenishing the TiO2 surface during the dark periods. Experiments conducted with longer illumination might not be favorable to enhance DMP decomposition, instead was more favorable for electron-hole recombination. Photocatalytic decomposition of DMP by UV-LED/TiO2 process under periodic illumination was agreeably modeled by the proposed Langmuir-Hinshelwood kinetic equation. Under the same illumination period of 5 s, the calculated energy consumption per order was decreased by more than 40% for experiments conducted with the increasing dark period from 0.5 to 5.0 s; thus, the electric energy consumption was substantially decreased.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 332, 1 January 2017, Pages 299-305
نویسندگان
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