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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/1726

Title: Coexistence of paramagnetic and superparamagnetic Fe(III) in mesoporous MCM-41 silicates
Authors: SELVAM, P
DAPURKAR, SE
BADAMALI, SK
MURUGASAN, M
KUWANO, H
Keywords: iron-containing mcm-41
molecular-sieves
fe2o3 nanoparticles
template
catalysis
chemistry
Issue Date: 2001
Publisher: ELSEVIER SCIENCE BV
Citation: CATALYSIS TODAY,68,69-74
Abstract: In the present study, we demonstrate the coexistence of paramagnetic and superparamagnetic Fe(III) in mesoporous MCM-41 matrix. The loading of trivalent iron in MCM-41 not only results in the formation of iron oxide nanoclusters in the mesovoids, but also substitutes (isomorphously) in the silicate matrix. The resulting non-framework and framework Fe(III) exhibit superparamagnetic and paramagnetic properties, respectively. The dual behaviour of Fe(III) in MCM-41 is deduced using various analytical and spectroscopic techniques, viz. X-ray diffraction (XRD), diffuse reflectance ultraviolet-visible (DRUV-VIS), electron paramagnetic resonance (EPR) and Mossbauer spectroscopy. (C) 2001 Elsevier Science B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/S0920-5861(01)00292-9
http://dspace.library.iitb.ac.in/xmlui/handle/10054/14891
http://hdl.handle.net/100/1726
ISSN: 0920-5861
Appears in Collections:Proceedings papers

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