کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1650697 | 1517336 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photo-oxidation over mesoporous V-TiO2 catalyst under visible light monitored by vanadium Kβ5,2-selecting XANES spectroscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Visible light-excited ethanol dehydration reaction steps to adsorb ethanol and then to donate an electron to transform V(IV) to V(III) site exposed on mesoporous V(IV)-TiO2 catalyst were successfully monitored by means of V Kβ5,2-selecting XANES spectroscopy. Spherically-bent Ge(422) crystal was used for the X-ray fluorescence analyses and Xe arc lamp of 500 W was illuminated at 10 mm apart from catalyst samples under on reaction conditions. Specific redox reaction mechanism between V(IV) and V(III) states was proposed for dehydration reaction over the mesoporous V-TiO2 catalyst based on the V Kβ5,2-selecting XANES compared to general vanadium catalysts starting from V(V) state for dehydrogenation reaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 62, Issues 6–7, 15 March 2008, Pages 861–864
Journal: Materials Letters - Volume 62, Issues 6–7, 15 March 2008, Pages 861–864
نویسندگان
Yasuo Izumi, Kazushi Konishi, Tomohisa Miyajima, Hideaki Yoshitake,