کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6492932 43929 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessment of activity of 'transparent and clear' and 'opaque and highly coloured' photocatalytic samples using a fluorescent photocatalytic activity indicator ink, FPaii
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Assessment of activity of 'transparent and clear' and 'opaque and highly coloured' photocatalytic samples using a fluorescent photocatalytic activity indicator ink, FPaii
چکیده انگلیسی
The photocatalytic activity of self-cleaning glass is assessed using a resazurin (Rz) photocatalyst activity indicator ink, i.e. Rz paii, via both the rate of change in the colour of the ink (blue to pink), R(Abs), and the rate of change in the fluorescence intensity, R(Fl), (λ(excitation) = 593 nm; λ(emission) = 639 nm) of the ink. In both cases the kinetics are zero order. Additional work with a range of glass samples of different photocatalytic activity reveals R(Abs) is directly related to R(Fl), thereby showing that the latter, like the former, can be used to provide a measure of the photocatalytic activity of the sample under test. The measured value of R(Fl) is found to be the same for 5 pieces of, otherwise identical, self-cleaning glass with: black, red, blue, yellow and no coloured tape stuck to their backs, which demonstrates that R(Fl) measurements can be used to measure photocatalytic activity under conditions of high colour and opacity under which R(Abs) cannot be measured. The relevance of this novel, fluorescence-based paii to the assessment of the activity of highly coloured, opaque photocatalytic samples, such as paints and tiles, is discussed briefly.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 330, 1 November 2016, Pages 90-94
نویسندگان
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