Jump to main content
Jump to site search

Issue 44, 2019
Previous Article Next Article

Micro- and macroscopic observations of the nucleation process and crystal growth of nanosized Cs-pollucite in an organotemplate-free hydrosol

Author affiliations

Abstract

The nucleation and crystal growth of a nanoscale cesium pollucite aluminosilicate zeolite (ANA topology) from an organotemplate-free precursor suspension are reported. By using a new and reactive synthesis recipe (5.5SiO2 : 1Al2O3 : 6Cs2O : 140H2O), zeolite nanocrystals with higher Al content (Si/Al ratio = 2.12) are obtained within 120 min under mild conditions (180 °C), which is much faster and safer as compared to those previously reported. The solid initially experiences amorphous phase re-organization before nucleation, crystallization and crystal growth take place. The resulting Cs-pollucite nanocrystals (average size 55 nm) display a trapezohedron morphology. The nanocrystals are colloidally stabilized in water and they are very active in the base-catalyzed cyanoethylation of dipropylamine reaction, giving 89.6% conversion at 180 °C within 50 min. In addition, a high solid yield of nanocrystals (ca. 70%) is also achieved, thus offering a green pathway for synthesizing zeolite nanocrystals with high basicity on a large scale.

Graphical abstract: Micro- and macroscopic observations of the nucleation process and crystal growth of nanosized Cs-pollucite in an organotemplate-free hydrosol

Back to tab navigation

Publication details

The article was received on 18 Jun 2019, accepted on 13 Oct 2019 and first published on 31 Oct 2019


Article type: Paper
DOI: 10.1039/C9NJ03151K
New J. Chem., 2019,43, 17433-17440

  •   Request permissions

    Micro- and macroscopic observations of the nucleation process and crystal growth of nanosized Cs-pollucite in an organotemplate-free hydrosol

    E. Ng, A. G. Mohammad S, S. Rigolet, T. J. Daou, S. Mintova and T. C. Ling, New J. Chem., 2019, 43, 17433
    DOI: 10.1039/C9NJ03151K

Search articles by author

Spotlight

Advertisements