کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10640264 | 995882 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Visible-light-driven nitrogen-doped TiO2 photocatalysts: effect of nitrogen precursors on their photocatalysis for decomposition of gas-phase organic pollutants
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Visible-light-driven nitrogen-doped TiO2 photocatalysts: effect of nitrogen precursors on their photocatalysis for decomposition of gas-phase organic pollutants Visible-light-driven nitrogen-doped TiO2 photocatalysts: effect of nitrogen precursors on their photocatalysis for decomposition of gas-phase organic pollutants](/preview/png/10640264.png)
چکیده انگلیسی
Yellow-colored N-doped TiO2 (NTO) powders were synthesized by spray pyrolysis from a mixed aqueous solution containing TiCl4 and an N-precursor (urea, guanidine, or ammonium fluoride). All resulting powders possessed spherical particles with an average particle diameter of 0.45 μm, however, the surface morphologies of particles significantly depended on the N-precursors. A porous surface was observed for the particles prepared by using NH4F as N-precursor. Acetaldehyde and trichloroethylene decompositions were used as probe reactions to evaluate the photocatalytic activity of these NTO powders under visible-light (vis) irradiation. The NTO powder prepared from a mixed solution of TiCl4 and NH4F demonstrated the highest photocatalytic activity among three N-precursors, and it was much higher than that of commercial P 25. This high photocatalytic activity was ascribed to a synergetic effect of several factors: its porous and acidic surface, doped N atoms, and simultaneously codoped F atoms during nitrogen introduction. However, no correlation between N-concentration and photocatalytic activity was observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 117, Issue 1, 25 February 2005, Pages 67-75
Journal: Materials Science and Engineering: B - Volume 117, Issue 1, 25 February 2005, Pages 67-75
نویسندگان
Di Li, Hajime Haneda, Shunichi Hishita, Naoki Ohashi,