Auwal, Ismail Alhassan and Mintova, Svetlana and Ling, Tau Chuan and Khoerunnisa, Fitri and Wong, Ka-Lun and Ng, Eng-Poh (2020) Crystallization profile and morphological study of SAPO-5 templated by imidazolium cations of different functional groups. MICROPOROUS AND MESOPOROUS MATERIALS, 308. ISSN 13871811, DOI https://doi.org/10.1016/j.micromeso.2020.110514.
Full text not available from this repository.Abstract
1-Propyl-2,3-dimethyl-1H-imidazole-3-ium (pmIm](+)), 3-(2,3-dihydroxypropyl)-1,2-dimethyl-1H-imidazole-3- ium (dhmIm](+)) and 1-benzyl-2,3-dimethyl-1H-imidazole-3-ium (bzmIm](+)) cations were used as organic templates for crystallizing SAPO-5 with AFI microporous framework. The physico-chemical influences of the functional groups of the templates (e.g. polarity/hydrophilicity, molecular dimension and size) on SAPO-5 formation were investigated. The results revealed that the crystallization rate, crystallinity and solid yield could be enhanced by increasing the polarity/hydrophilicity of the templates. In addition, the isomorphous Si substitution, morphology and particle size of the resulted SAPO-5 were also affected by the substituted groups of the imidazolium templates. The thermogravimetry results further supported that the selection of organic template with proper polarity/hydrophilicity could be crucial to obtain SAPO-5 with high porosity (S-BET, S-mic, S-ext and V-total) as high polar/hydrophilic template exhibited stronger chemical interaction with the AFI framework during template removal process via calcination process.
| Item Type: | Article |
|---|---|
| Funders: | RUI (Grant No. 1001/PKIMIA/8011128) |
| Uncontrolled Keywords: | SAPO-5; Microporous material; Hydrothermal synthesis; Imidazolium template; Functional group; Polarity |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Institute of Biological Sciences |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 28 Dec 2023 06:38 |
| Last Modified: | 28 Dec 2023 06:38 |
| URI: | http://eprints.um.edu.my/id/eprint/36203 |
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