کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6493010 | 43978 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photocatalytic activity enhancement of TiO2 thin films with silver doping under visible light
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
TiO2 and silver doped TiO2 films (photoanodes) were prepared by the sol-gel method using silver contents of 1%, 3% and 5% (w/w). Photoelectrocatalytic activity of these photoanodes was evaluated by monitoring the photocatalytic decomposition of methanol and basic orange II (BOII) in aqueous solution under visible light illumination at pH 3 adjusted with HClO4 by the application of potential bias. Enhanced photoelectrocatalytic activity was found by the application of 0.4Â V (vs. SCE) bias potential under visible light illumination. A detrimental effect was observed on the photoelectrocatalytic activity of the TiO2 photoanodes in the presence of BOII, and is evident from the low photocurrents; however, the presence of silver in the TiO2 films increased the photoelectrocatalytic activity. Also the photoelectrolysis of methanol removed over 80% of total organic carbon in 5Â h of reaction under visible light and 0.4Â V (vs. SCE) bias potential. Nevertheless, negligible TOC removal was observed for the BOII photoelectrolysis with or without bias potential and under visible light illumination or in dark. Less than 9% of discoloration was achieved at the 3% Ag-TiO2 photoanode under visible light illumination and bias potential.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 262, 15 June 2013, Pages 57-63
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 262, 15 June 2013, Pages 57-63
نویسندگان
Dulce Jocelyn Ramos Gutiérrez, Nini Rose Mathews, Susana Silva MartÃnez,