Hierarchical micro-/mesoporous zeolite microspheres prepared by colloidal assembly of zeolite nanoparticles
Artikel i vetenskaplig tidskrift, 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.

Författare

Walter Rosas Arbelaez

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Andreas J. Fijneman

Technische Universiteit Eindhoven

Heiner Friedrich

Technische Universiteit Eindhoven

Anders Palmqvist

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

RSC Advances

2046-2069 (ISSN)

Vol. 10 60 36459-36466

Ämneskategorier

Livsmedelsteknik

Annan kemi

Vattenbehandling

DOI

10.1039/d0ra07394f

Mer information

Senast uppdaterat

2020-11-10