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Indexed by:期刊论文

Date of Publication:2017-03-05

Journal:JOURNAL OF ALLOYS AND COMPOUNDS

Included Journals:SCIE、EI

Volume:696

Page Number:788-794

ISSN No.:0925-8388

Key Words:Ferrierite; Sodalite; Ethylene glycol; Oxidation; C-13 NMR

Abstract:Sodalite materials with different Si/Al ratios and ferrierite have been successfully crystallized using ethylene glycol (EG) as structure directing agent. The zeolite crystals obtained were characterized by Xray diffraction (XRD), infrared spectra (IR), Raman spectra, thermal analysis (TG), elemental analysis (EA), inductively coupled plasma Mass Spectrometer (ICP) and multinuclear MAS NMR spectroscopy. It is found that EG is occluded in the ferrierite and sodalites in the same state. Furthermore, the oxidation by H2O2 and HIO4 of EG restricted within these zeolites has been studied. Based on the IR, Raman spectra, TG, EA and C-13 NMR spectra data, it has been found that the restricted EG molecules in the two sodalites remained unchanged during the oxidation process because they are occluded in the beta-cage. In ferrierite, the oxidation products were alkanes and other alcohols by H2O2, whereas alkynes, acetals and ketals produced by HIO4. These oxidation products are different from the bulk reaction. This work not only promotes the study of SDAs in the synthesis of zeolites, but also provides a new idea for further research of molecular reactions on the inorganic hybrids. (C) 2016 Elsevier B.V. All rights reserved.