Synthesis of 4Å single-walled carbon nanotubes in catalytic Si-substituted AlPO4‐5 molecular sieves
| Autor: | Huijun Liu, Zikang Tang, Jianpang Zhai, Irene Ling Li, Che Ting Chan, Ping Sheng, Zhaoming Li |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
chemistry.chemical_classification
Materials science Physics and Astronomy (miscellaneous) Analytical chemistry Infrared spectroscopy Carbon nanotube Molecular sieve Catalysis law.invention Optical properties of carbon nanotubes symbols.namesake Hydrocarbon Chemical engineering chemistry law symbols Molecule Raman spectroscopy |
| Zdroj: | Applied Physics Letters. 85:1253-1255 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | 4A single-walled carbon nanotubes (SWCNs) were fabricated using Si-substituted AlPO4‐5 (SAPO-5) molecular sieves as the template. In comparison with neutral AlPO4‐5, the SAPO-5 framework plays an important role as a catalyst in pyrolyzing the hydrocarbon molecules, owing to the Bonsted acid sites. The first-principles calculation shows the Si decoration to be very favorable to the formation of carbon nanotubes in the SAPO-5 channels. The resulting SWCNs have better quality than those fabricated without Si doping, evidenced by clearer and stronger radial breathing modes in the Raman spectra. |
| Databáze: | OpenAIRE |
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