Self-assembled titanosilicate TS-1 nanocrystals in hierarchical structures

Louwanda Lakiss (1) , Mickael Rivallan (2) , Jean-Michel Goupil (3) , Jaafar El Fallah , Svetlana Mintova (3)

1 LMPC - Laboratoire de Matériaux à Porosité Contrôlée
2 IFPEN - IFP Energies nouvelles
3 LCS - Laboratoire catalyse et spectrochimie

Hierarchical structures consisting of microporous titanosilicate TS-1 nanocrystals (MFI-type structure) are obtained by controlled evaporation of colloidal suspensions. The TS-1 nanocrystals with diameter of 60-80 nm are prepared by hydrothermal treatment of clear precursor suspension. The purified TS-1 colloidal suspensions are dried under controlled conditions in order to form hierarchical structures with uniform micropores originated from the TS-1 nanocrystals, mesopores coming from the interparticles spacing and macropores emerging from the controlled evaporation of the solvent. The as-prepared micro/meso/macroporous TS-1 materials are treated by non-thermal plasma to remove the organic template and subsequently characterized by spectroscopy (DLS, IR, UV-vis), microscopy (TEM, SEM), X-ray diffraction, nitrogen sorption and mercury intrusion porosimetry. Besides, the sorption and confinement of 2,4,6-trimethylpyridine (collidine) probe molecule in the micro/meso/macroporous TS-1 structure is followed by FTIR. (C) 2011 Elsevier B.V. All rights reserved.

Mots clés: Sorption; Nanocrystals; Hierarchical structures; Non-thermal plasma; porosity; TS-1

Domaines: Chimie

Louwanda Lakiss, Mickael Rivallan, Jean-Michel Goupil, Jaafar El Fallah, Svetlana Mintova. Self-assembled titanosilicate TS-1 nanocrystals in hierarchical structures. Catalysis Today, 2011, 168 (1), pp.112--117. ⟨hal-01840399⟩