Catalyst effect of metal cations on pyrolysis of hydrocarbon molecules and formation of carbon nanotubes in the channels of AlPO4-5 crystals |
| |
| Authors: | J P Zhai Z M Li Irene L Li H J Liu P Sheng and Z K Tang |
| |
| Affiliation: | (1) Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China;(2) School of Engineering and Technology, Shenzhen University, Shenzhen, 518060;(3) Department of Physics, Wuhan University, Wuhan, 43007, China |
| |
| Abstract: | Ultra-small single-walled carbon nanotubes (SWNTs) with diameter of 0.4 nm were fabricated in the channels of AlPO4-5 crystals by pyrolyzing hydrocarbon molecules. In order to improve the structural quality of the SWNTs, we introduced Br?nsted
acid sites onto the channel walls by incorporating metal cations (Mn, Mg, Co, and Si) into AlPO4-5 framework. The Br?nsted acid sites play an important catalytic role in the carbonization of hydrocarbon molecules (tripropylamine)
in the AlPO4-5 channels, and favor the formation of SWNTs, as revealed by the significant decrease in formation energy of the nanotubes.
The experimental results agree well with the predictions of first-principles calculations. |
| |
| Keywords: | Ultra-small carbon nanotube AlPO4-5 crystal Template |
| 本文献已被 SpringerLink 等数据库收录！ |
|
