Study of the Mechanism of Carbonization of Template in Silicon-Substituted Aluminophosphate Zeolite Crystals
| Autor: | J.P. Zhai, Shuang Chen Ruan, Zikang Tang, Wei Wei Peng, Irene Ling Li |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Carbonization Microporous material Carbon nanotube Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound General Energy Chemical engineering chemistry law Molecule Organic chemistry Dipropylamine Physical and Theoretical Chemistry Fourier transform infrared spectroscopy Zeolite Pyrolysis |
| Zdroj: | The Journal of Physical Chemistry C. 112:11702-11706 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp802218x |
| Popis: | Silicon-substituted microporous aluminophosphate AlPO4-11 zeolite crystals (SAPO-11) were synthesized by a hydrothermal method. The dipropylamine (DPA) molecules were incorporated in the one-dimensional channels of SAPO-11 as organic templates. The DPA molecules can be pyrolyzed at high temperature, and form 0.3 nm single-walled carbon nanotubes (SWNTs). The detailed carbonization process of DPA molecules has been investigated by using Fourier transform infrared measurements (FTIR), mass spectrometry, thermogravimeter (TG), and micro-Raman spectroscopy. During the pyrolysis process, the DPA molecules decompose into propylene and ammonia at 673 K, and then the C−H bonds of C3H6 start to break when temperature is above 698 K. The 0.3 nm SWNTs are formed sequentially in the channels of SAPO-11 crystals at about 723 K. |
| Databáze: | OpenAIRE |
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