کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1864792 1037758 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of hydrogen on the growth and morphology of single wall carbon nanotubes synthesized on a FeMo/MgO catalytic system
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Effect of hydrogen on the growth and morphology of single wall carbon nanotubes synthesized on a FeMo/MgO catalytic system
چکیده انگلیسی

Single wall carbon nanotubes were synthesized from thermal pyrolysis of methane on a FeMo/MgO catalyst by radio frequency catalytic chemical vapor deposition (RF-CVD) using argon as a carrier gas. Controlled amounts of hydrogen (H2/CH4=0–1 v/vH2/CH4=0–1 v/v) were introduced in separate experiments along with the carbon source. The properties and morphology of the synthesized single wall carbon nanotubes were monitored by transmission electron microscopy, Raman scattering, and thermogravimetric analysis. The nanotubes with the highest crystallinity were obtained with H2/CH4=0.6H2/CH4=0.6. By monitoring the Radial Breathing Modes present in the Raman spectra of the single-wall carbon nanotube samples, the variation of the structural and morphological properties of the carbon nanotubes with the flow level of hydrogen, reflect changes of the catalyst systems induced by the presence of hydrogen.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 372, Issue 17, 21 April 2008, Pages 3051–3057
نویسندگان
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