Synthesis of Cs-ABW nanozeolite in organotemplate-free system

Ali Ghrear, Tamara Mahmoud and Rigolet, Severinne and Daou, T. Jean and Mintova, Svetlana and Ling, Tau Chuan and Tan, Soon Huat and Ng, Eng Poh (2019) Synthesis of Cs-ABW nanozeolite in organotemplate-free system. Microporous and Mesoporous Materials, 277. pp. 78-83. ISSN 1387-1811, DOI

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Cesium-aluminosilicate zeolite nanocrystals with ABW framework structure are synthesized free of organic template using hydrothermal approach. The crystallization process of Cs-ABW zeolite nanocrystals by varying the initial gel molar composition, heating temperature and crystallization time was studied. More detailed investigations of the formation of Cs-ABW nanozeolite using a reactive clear precursor hydrogel (4SiO2:1Al2O3:16Cs2O:160H2O) were then carried out. Fully crystalline Cs-ABW nanozeolites were obtained within 120 min at 180 °C and 22 bar, which is considerably faster and safer in comparison to the currently available method involving treatment at 695 °C, 1000 bar and 46 h. The Cs-ABW nanocrystals have grain shape morphology with a mean size of 32 nm and they do not agglomerate for long durations. The nanosized Cs-ABW zeolite has high alumina content (Si/Al ratio = 1.04). These nanocrystals can be prepared in high solid yield (ca. 82%) thus offering a promising route for large-scale production of highly basic zeolite nanoparticles.

Item Type: Article
Funders: RUI (1001/PKIMIA/8011012), SATU Joint Research Scheme (RU018O-2016)
Uncontrolled Keywords: Cs-ABW; Zeolite nanocrystals; Nucleation; Crystal growth; Template-free synthesis; Fast hydrothermal synthesis
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Q Science > QH Natural history
T Technology > TP Chemical technology
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 23 Jan 2019 07:03
Last Modified: 23 Jan 2019 07:03

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