کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1506109 993781 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and photocatalytic activity of visible light-active sulfur and nitrogen co-doped SrTiO3
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Preparation and photocatalytic activity of visible light-active sulfur and nitrogen co-doped SrTiO3
چکیده انگلیسی

Nitrogen and sulfur co-doped SrTiO3 was prepared by high energy grinding of the mixture of SrTiO3 and thiourea. A new band gap in visible light region (522 nm) corresponding to 2.37 eV could be formed by the co-doping. The photocatalytic activity for nitrogen monoxide oxidation of SrTiO3 in visible light region especially in the long wavelength range (λ > 510 nm) could be improved greatly. Under the irradiation of light with wavelength larger than 510 nm, the photocatalytic activity of nitrogen and sulfur co-doped SrTiO3 was 10.9 times greater than that of pure SrTiO3. The high visible light photocatalytic activity of this substance may be due to the formation of a new band gap that enables to absorb visible light effectively.

The nitrogen and sulfur co-doped SrTiO3 exhibited higher NO elimination capability than pure SrTiO3 both in visible light range and near ultraviolet range. When the light was turned off, NO concentration returned to its initial level of 1 ppm within 10 min, indicating that the light energy is necessary for the oxidation of NO, i.e., NO was photocatalytically eliminated.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Sciences - Volume 11, Issue 1, January 2009, Pages 182–188
نویسندگان
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