کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
582789 | 877859 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation, characterization and photocatalytic activity of manganese doped TiO2 immobilized on silica gel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
A series of Mn-TiO2/SiO2 (silica gel loaded with manganese doped TiO2) photocatalysts have been prepared by sol-gel method, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Photocatalytic activities were enhanced in photocatalytic degradation of methyl orange over Mn-TiO2/SiO2. XPS analysis shows that a TiOSi or TiOMn bond is formed on the surface of photocatalyst. Mn is doped as a mixture of Mn2+ and Mn3+ on the surface of 1.0Â mol% Mn-TiO2/SiO2. Mn3+ appears to trap electrons and prohibit the electron-hole recombination. The electrons trapped in Mn3+ site are subsequently transferred to the adsorbed O2. As a result, the combination of the electron-hole pair was reduced.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 160, Issue 1, 15 December 2008, Pages 78-82
Journal: Journal of Hazardous Materials - Volume 160, Issue 1, 15 December 2008, Pages 78-82
نویسندگان
Yuehua Xu, Bo Lei, Laiqiu Guo, Wuyi Zhou, Youqin Liu,