Cheong, Ying Wai and Wong, Ka-Lun and Ling, Tau Chuan and Ng, Eng Poh (2018) Rapid synthesis of nanocrystalline zeolite W with hierarchical mesoporosity as an efficient solid basic catalyst for nitroaldol Henry reaction of vanillin with nitroethane. Materials Express, 8 (5). pp. 463-468. ISSN 2158-5849, DOI https://doi.org/10.1166/mex.2018.1454.
Full text not available from this repository.Abstract
Zeolite W nanorods (MER topology) containingK+ cation (K-W) has been synthesized for the first time without the use of organic structure-directing-agent (OSDA). With microwave heating, the synthesis time can be shortened to 12 min, which is much shorter than the time required by conventional method (10 days, 150o C). The study reveals that the use of basic synthesis condition and K+ as the cation source are essential in order to produce zeolite W nanocrystals. The K-W displays bundle-like nanorods morphology with highly accessible hierarchical mesoporosity. The nanocrystals are colloidal stable in water and contain large amount of extraframework K+ cations. The K-W has demonstrated very good performance as a recyclable base catalyst in Henry (nitroaldol) reaction of vanillin with nitroethane (conversion 86.5%).
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Henry Reaction; Hierarchical Mesoporosity; Nanosized K-W Zeolite; Rapid Template-Free Synthesis; Solid Base Catalyst |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry Q Science > QH Natural history |
| Divisions: | Faculty of Science > Institute of Biological Sciences |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 05 Sep 2019 01:54 |
| Last Modified: | 05 Sep 2019 01:54 |
| URI: | http://eprints.um.edu.my/id/eprint/22241 |
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