کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1682384 1010469 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparative catalytic activity of PET track-etched membranes with embedded silver and gold nanotubes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Comparative catalytic activity of PET track-etched membranes with embedded silver and gold nanotubes
چکیده انگلیسی
All “as-prepared” composites were examined for catalytic activity using reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by sodium borohydride as a common reaction to test metallic nanostructures catalysts. The effect of temperature on the catalytic activity was investigated in range of 292-313 K and activation energy were calculated. Kapp of Ag/PET composites linearly increase with an increase of the temperature thus normal Arrhenius behavior have been seen and the activation energy was calculated to be 42.13 kJ/mol. Au/PET composites exhibit not only more powerful catalytic activity but also non-linear dependence of rate constant from temperature. Kapp increased with increasing temperature throughout the 292-308 K temperature range; the reaction had an activation energy 65.32 kJ/mol. In range 311-313 K rate constant dramatically decreased and the apparent activation energy at this temperature rang was −91.44 kJ/mol due some structural changes, i.e. agglomeration of Au nanoparticles on the surface of composite.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 365, Part A, 15 December 2015, Pages 70-74
نویسندگان
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