Ghrear, Tamara Mahmoud Ali and Cheong, Ying-Wai and Lim, Gin Keat and Chateigner, Daniel and Ling, Tau Chuan and Tan, Soon Huat and Ng, Eng-Poh (2020) Fast, low-pressure, low-temperature microwave synthesis of ABW cesium aluminosilicate zeolite nanocatalyst in organotemplate-free hydrogel system. Materials Research Bulletin, 122. ISSN 0957-4522, DOI https://doi.org/10.1007/s10854-019-02757-0.
Full text not available from this repository.Abstract
Cs-ABW zeolite nanocrystals were synthesized using a microwave-assisted hydrothermal technique without an organic template. Using powder X-ray diffraction Rietveld refinement and spectroscopy, we found that pure ABW-type CsAlSiO4 zeolite nanocrystals (Si/Al ratio = 1.08) with an orthorhombic structure (space group Pc21n, a = 9.4425(21) angstrom; b = 5A437(11) angstrom; c = 8.9152(19) angstrom) can be crystallized from a clear precursor solution of 4SiO(2):1Al(2)O(3):16Cs(2)O:160H(2)O (180 degrees C, 6 min). The Cs-ABW nanoparticles had a mean particle size of 68 nm and were thermally and colloidally stable. The nanocrystals-which had high accessible basic sites, (Si-O-Al)Cs--(+), located at their external surface-were active in catalyzing the cyanoethylation of aliphatic alcohols under non-microwave instant heating, with 100 % selectivity to the desired product and high catalyst reusability. Furthermore, the cyanoethylation of methanol catalyzed by nanocrystalline Cs-ABW under instant heating had equal or better reactivity than those catalyzed by other solid base catalysts.
| Item Type: | Article |
|---|---|
| Funders: | None |
| Uncontrolled Keywords: | Sol-gel chemistry; Microporous materials; Crystal growth; Crystal structure; Catalytic properties |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Nanotechnology & Catalysis Research Centre |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 27 Nov 2024 04:05 |
| Last Modified: | 28 Nov 2024 03:44 |
| URI: | http://eprints.um.edu.my/id/eprint/36918 |
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