Crystallization profile and morphological study of SAPO-5 templated by imidazolium cations of different functional groups
Document Type
Article
Publication Date
12-1-2020
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.
Keywords
SAPO-5, Microporous material, Hydrothermal synthesis, Imidazolium template, Functional group, Polarity
Divisions
InstituteofBiologicalSciences
Funders
RUI (Grant No. 1001/PKIMIA/8011128)
Publication Title
MICROPOROUS AND MESOPOROUS MATERIALS
Volume
308
Publisher
ELSEVIER
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS