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Mojgan Zendehdel

Mojgan Zendehdel

Academic rank: Professor
ORCID: https://orcid.org/0000-0003-1890-0317
Education: PhD.
ScopusId: 8613426000
Faculty: Science
Address: Arak University
Phone:

Research

Title
Appraisal of microwave-assisted ion-exchange in mordenite by crystal structure analysis
Type
JournalPaper
Keywords
Mordenite  Transition metals  Solid state ion exchange  Rietveld refinement
Year
2011
Journal JOURNAL OF POROUS MATERIALS
DOI
Researchers Mojgan Zendehdel ، Giuseppe Cruciani

Abstract

Transition metal-containing mordenite have been prepared by solid state ion exchange with microwave irradiation of mechanical mixtures of CoCl26H2O, NiCl26H2O and CuCl22H2O with mordenite at 750 W microwave power and for 10–20 min treatment time. The prepared transition metal-mordenite were characterized by X-ray diffraction (XRD), Fourier Transform infrared spectroscopy (FT-IR), simultaneous TG and DTA thermal analyses (TG/DTA), surface area measurement (BET), and diffuse reflectance spectroscopy (DRS). The results show that Co2?, Ni2 ?, and Cu2? metal ions are actually incorporated into mordenite pores. The extra-framework locations of metal cations were determined Rietveld refinement of XRD data, performed in the Cmcm space group for all three samples. Three metal sites were located: the first site is in an almost perfect boat-shaped coordination with framework oxygen’s, the second site is poorly coordinated while the third metal cation site was found at the center of mordenite cage in six-fold coordination to water molecules.