Hierarchical micro-/mesoporous zeolite microspheres prepared by colloidal assembly of zeolite nanoparticles
Journal article, 2020

A novel template-free colloidal assembly method that combines colloidal zeolite (silicalite-1) suspensions in a water-in-oil emulsion with an evaporation-induced assembly process has been developed for preparing hierarchical micro-/mesoporous zeolite microspheres (MZMs). Such particles have an interconnected mesoporosity and large mesopore diameters (25-40 nm) combined with 5.5 Å diameter micropores of the zeolite nanoparticles. The method developed has the advantages of employing mild synthesis conditions, a short preparation time, and not requiring the use of a mesoporogen template or post-treatment methods. The method provides a new range of micro-/mesoporous zeolites with tunable mesoporosity dictated by the size of the zeolite nanoparticles. It also offers the possibility of combining several zeolite particle sizes or optionally adding amorphous silica nanoparticles to tune the mesopore size distribution further. It should be generally applicable to other types of colloidal zeolite suspensions (e.g. ZSM-5, zeolite A, beta) and represents a new route amenable for cost-effective scale-up.

Author

Walter Rosas Arbelaez

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Andreas J. Fijneman

Eindhoven University of Technology

Heiner Friedrich

Eindhoven University of Technology

Anders Palmqvist

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

RSC Advances

2046-2069 (ISSN)

Vol. 10 60 36459-36466

Subject Categories

Food Engineering

Other Chemistry Topics

Water Treatment

DOI

10.1039/d0ra07394f

More information

Latest update

11/10/2020