K-F zeolite nanocrystals synthesized from organic-template-free precursor mixture

Siew-Fang Wong (1) , Hussein Awala (2) , Aurélie Vincente (2) , Richard Retoux (3) , Tau Chuan Ling (4) , Svetlana Mintova (2) , Rino Mukti (5) , Eng-Poh Ng (1)

1 USM - Universiti Sains Malaysia
2 LCS - Laboratoire catalyse et spectrochimie
3 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
4 UM - University of Malaya = Universiti Malaya [Kuala Lumpur, Malaisie]
5 ITB - Institut Teknologi Bandung

K-F zeolite nanocrystals (structure code EDI) are synthesized from a template-free Al2O3–SiO2–K2O–H2O precursor system. The use of a very reactive organic-template-free gel system (4SiO2: 1Al2O3: 16K2O: 160H2O) enables the crystallization of EDI-type nanosized zeolite to accomplish within 3 h at 100 °C. The K-F zeolite crystals have flattened cuboid shape morphology (ca. 27 nm) and they tend to agglomerate and form secondary spherical particles (ca. 310 nm). The K-F zeolite nanocrystals have high alumina content (Si/Al ratio = 1.10) and high crystalline solid yield (79%) offering a promising route for large-scale production of hydrophilic zeolite nanoparticles.

Mots clés: K-F; EDI; Zeolite; Nanocrystals; Template-free synthesis; Hydrothermal synthesis

Domaines: Chimie

Siew-Fang Wong, Hussein Awala, Aurélie Vincente, Richard Retoux, Tau Chuan Ling, et al.. K-F zeolite nanocrystals synthesized from organic-template-free precursor mixture. Microporous and Mesoporous Materials, 2017, 249, pp.105-110. ⟨10.1016/j.micromeso.2017.04.053⟩. ⟨hal-02410413⟩