Synthesis of Cs-ABW nanozeolite in organotemplate-free system
Document Type
Article
Publication Date
1-1-2019
Abstract
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.
Keywords
Cs-ABW, Zeolite nanocrystals, Nucleation, Crystal growth, Template-free synthesis, Fast hydrothermal synthesis
Divisions
InstituteofBiologicalSciences
Funders
RUI (1001/PKIMIA/8011012),SATU Joint Research Scheme (RU018O-2016)
Publication Title
Microporous and Mesoporous Materials
Volume
277
Publisher
Elsevier