کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1558455 | 999298 | 2012 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of carbon nanotubes on carbon fibers by modified chemical vapor deposition
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
شیمی مواد
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Carbon nanotubes (CNTs) were synthesized on carbon fibers by a modified thermal chemical vapor deposition (CVD) method. The fibers were first treated at a temperature of 973 K and then treated by a mixture of sulfur acid and nitric acid with a volume ratio of 1:3 to improve the dispersion of catalyst precursor (Fe(NO3)3·9H2O) on the surface before impregnation with a catalyst solution. The carbon fibers then underwent simultaneous catalyst reduction and CNT growth to decrease the contact time between the transition metal and the carbon fiber surface, and a uniform and thick CNT forest could be obtained with no significant decrease of the mechanical strength of the carbon fibers compared with those produced by traditional thermal CVD. An in-depth analysis shows that the process parameters have a great influence on the CNT growth rate, such as the type of solvent, concentration of Fe(NO3)3·9H2O, the ratio of H2 to C2H2, and the growth time. It was revealed that a better CNT forest could be obtained when the catalyst solvent is ethanol, the Fe concentration is 100 mM, the ratio of H2/C2H2 is 4/1, the temperature is 1 023 K and the growth time is 30 min.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Carbon Materials - Volume 27, Issue 5, October 2012, Pages 352-361
Journal: New Carbon Materials - Volume 27, Issue 5, October 2012, Pages 352-361
نویسندگان
Zhi-hui HU, Shao-ming DONG, Jian-bao HU, Zhen WANG, Bo LU, Jin-shan YANG, Qing-gang LI, Bin WU, Le GAO, Xiang-yu ZHANG,