کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7853745 | 1508871 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New developments in the growth of 4 Angstrom carbon nanotubes in linear channels of zeolite template
ترجمه فارسی عنوان
تحولات جدید در رشد 4 نانولوله کربنی آنگستروم در کانال های خطی سلول زئولیت
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
چکیده انگلیسی
We report new developments on the chemical vapor deposition growth of 0.4Â nm single-walled carbon nanotubes (SWCNTs) inside the linear channels of the aluminophosphate zeolite, AlPO4-5 (AFI), single crystals (0.4Â nm-SWCNT@AFI). Ethylene (C2H4) and carbon monoxide (CO) were used as the feedstock. Polarized Raman spectroscopy was used to analyze the structure and quality of SWCNTs, both the radial breathing mode and G-band are much clearer and stronger than the samples grown by the old process which used template tripropylamine molecules for growing SWCNT@AFI. From the Raman spectra, it is clearly seen that the RBM is composed of two peaks at 535 and 551Â cmâ1. By using the pseudopotential module in Material Studio to calculate the Raman lines, the 535Â cmâ1 peak is attributed to the (5,0) SWCNTs and the 551Â cmâ1 peak to the (3,3) SWCNTs. The abundance of (4,2) is relatively small. Thermal gravity analysis showed that while the samples grown by CO display less than 1Â wt% of carbon, for the samples heated in C2H4 atmosphere the weight percentage of SWCNTs is around 10%, which implies â¼30% of the AFI channels are occupied with SWCNTs, a significant increase compared with the previous samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 76, September 2014, Pages 401-409
Journal: Carbon - Volume 76, September 2014, Pages 401-409
نویسندگان
Qihong Chen, Zhe Wang, Yuan Zheng, Wu Shi, Dingdi Wang, Yi-Chia Luo, Bing Zhang, Jianming Lu, Haijing Zhang, Jie Pan, Chung-Yuan Mou, Zikang Tang, Ping Sheng,