کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10611374 986061 2005 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Catalytic CVD synthesis of double and triple-walled carbon nanotubes by the control of the catalyst preparation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Catalytic CVD synthesis of double and triple-walled carbon nanotubes by the control of the catalyst preparation
چکیده انگلیسی
We report the influence of catalyst preparation conditions for the synthesis of carbon nanotubes (CNTs) by catalytic chemical vapour deposition (CCVD). Catalysts were prepared by the combustion route using either urea or citric acid as the fuel. We found that the milder combustion conditions obtained in the case of citric acid can either limit the formation of carbon nanofibres (defined as carbon structures not composed of perfectly co-axial walls or only partially tubular) or increase the selectivity of the CCVD synthesis towards CNTs with fewer walls, depending on the catalyst composition. It is thus for example possible in the same CCVD conditions to prepare (with a catalyst of identical chemical composition) either a sample containing more than 90% double- and triple-walled CNTs, or a sample containing almost 80% double-walled CNTs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 43, Issue 2, 2005, Pages 375-383
نویسندگان
, , ,