Inception and Trapping of ZnO Nanoparticles within Desilicated Mordenite and ZSM-5 Zeolites

A. Susarrey Arce, M.A. Hernandez-Espinosa, F. Rojas-Gonzalez, C.P. Reed, V. Petranovskii, A. Licea

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

ZnO nanoparticle inception within mordenite and ZSM-5 zeolites, of varied Si/Al ratios, was achieved via the exchange of zeolite cations with Zn2+, followed by NaOH leaching, and thermal treatment at 550 °C under O2. ZnO particles were observed by electron microscopy; further characterization included X-ray diffraction, thermogravimetric analysis, and N2 sorption. NaOH addition caused a partial desilication of mordenite and ZSM-5 zeolites as shown by a decreased Si/Al ratio. The bulk and surface Zn and Al concentrations were measured by ICP-AE spectrometry and XPS, respectively. N2 sorption isotherms on ZnO/zeolite specimens indicated the existence of micropores and mesopores; the amounts of them in mordenite and ZSM-5 zeolites were determined from adsorption data at low pressures. The progressive growth of ZnO nanoparticles induced some micropore widening as well as the inception of a slit-like intrazeolite mesoporosity due to the desilication of the substrate during the NaOH leaching process. The final zeolite products are potentially useful as they are endowed with a twofold micro-mesoporosity.
Original languageEnglish
Pages (from-to)100-111
JournalParticle & particle systems characterization
Volume27
Issue number3-4
DOIs
Publication statusPublished - 13 Jul 2010

Keywords

  • METIS-282486
  • IR-95273

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