کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1788122 1023459 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and photocatalytic degradation of erbium doped titanium dioxide nanorods
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Preparation and photocatalytic degradation of erbium doped titanium dioxide nanorods
چکیده انگلیسی

Photocatalytic degradation of methylene blue (MB) in water was examined using Er3+-doped TiO2 (Er–TiO2) nanorods prepared by a sol–gel derived electrospinning, calcination, and subsequent mechanical grinding. Different concentrations of Er dopant in the range of 0–1.0 mol% were synthesized to evaluate the effect of Er content on the photocatalytic activity of TiO2. Among Er3+–TiO2 catalysts, the 0.7 mol% Er3+–TiO2 catalyst showed the highest MB degradation rate. The degradation kinetic constant (k) increased from 1.0 × 10−3 min−1 to 5.1 × 10−3 min−1 with the increase of Er3+ doping from 0 to 0.7 mol%, but decreased down to 2.1 × 10−3 min−1 when Er3+ content was 1.0 mol%. It can be concluded that the degradation of MB under UV radiation was more efficient with Er3+–TiO2 catalyst than with pure TiO2. The higher activity might be attributed to the transition of 4f electrons of Er3+ and red shifts of the optical absorption edge of TiO2 by erbium ion doping.


► Photocatalytic degradation of methylene blue was examined using Er3+–TiO2 nanorods.
► Nanorods were prepared by electrospinning, calcinations and mechanical grinding.
► The 0.7 mol% Er3+–TiO2 catalyst showed the highest MB degradation rate.
► The degradation is attributed to the transition of 4f electrons of Er3+.
► And red shifts of the optical absorption edge of TiO2 by erbium ion doping.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 12, Issue 4, July 2012, Pages 1229–1233
نویسندگان
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