کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4754206 | 1417608 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Efficient photochemical decomposition of trifluoroacetic acid and its analogues with electrolyzed sulfuric acid
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
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![عکس صفحه اول مقاله: Efficient photochemical decomposition of trifluoroacetic acid and its analogues with electrolyzed sulfuric acid Efficient photochemical decomposition of trifluoroacetic acid and its analogues with electrolyzed sulfuric acid](/preview/png/4754206.png)
چکیده انگلیسی
Electrolyzed sulfuric acid is a new chemical reagent prepared by electrolysis of aqueous sulfuric acid. In the present work, the concentrations of the oxidizing species (S2O82-, HSO5â, and H2O2) present in electrolyzed sulfuric acid were quantified, and photochemical decomposition of trifluoroacetic acid (CF3COOH, TFA), pentafluoropropionic acid (C2F5COOH, PFPA), and heptafluorobutyric acid (C3F7COOH, HFBA) in water with electrolyzed sulfuric acid was investigated. TFA was efficiently decomposed to Fâ and CO2 with electrolyzed sulfuric acid under irradiation with UV-visible light (220-460Â nm), and the quantum yield for TFA decomposition under irradiation with 254-nm monochromatic light was measured to be 0.20. Among the oxidizing species present in the electrolyzed sulfuric acid, S2O82- played the dominant role in the photochemical reactions, and the combination of S2O82â and highly acidic conditions (pH â¼1.0) resulting from the coexistence of H2SO4 was the main reason for the high reactivity. PFPA and HFBA were also efficiently decomposed with electrolyzed sulfuric acid. The pseudo-first-order rate constants for the decrease in the amounts of these substrates were 1.6-1.9 times as high as those for conventional decomposition reactions with the potassium salt of S2O82â.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 332, 1 January 2017, Pages 167-173
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 332, 1 January 2017, Pages 167-173
نویسندگان
Hisao Hori, Ryo Manita, Kenta Yamamoto, Shuzo Kutsuna, Masaaki Kato,