کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10243024 | 46905 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photocatalytic reduction of CO2 on copper-doped Titania catalysts prepared by improved-impregnation method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
Photocatalytic reduction of CO2 by copper-doped titania catalysts has been investigated. The photocatalysts with various copper species (Cu0, CuI, CuII) were prepared by an improved-impregnation method, where copper nitrate is doped into TiO2 Degussa-P25. It is likely that copper present on the catalyst surface and the grain size of copper-titania catalysts is uniform, with crystallite size approximately 23Â nm. The dispersion capacity of CuO in the vacant sites of TiO2 is about 4.16 Cu2+ nmâ2 (â2.2Â wt% of Cu), as indicated by XRD analysis. The activation energy (Ea) for Degussa-P25 and 3%CuO/TiO2 is ca. +26 and +12Â kJ/mol, respectively. These Ea values suggest that the desorption event is a rate limiting step, and the lower Ea of 3%CuO/TiO2 may suggest a catalytic role of copper species that enhance the methanol production.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 6, Issue 5, May 2005, Pages 313-319
Journal: Catalysis Communications - Volume 6, Issue 5, May 2005, Pages 313-319
نویسندگان
Slamet Slamet, Hosna W. Nasution, Ezza Purnama, Soleh Kosela, Jarnuzi Gunlazuardi,