Reference : Iron(III) species dispersed in porous silica through sol-gel chemistry
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/19595
Iron(III) species dispersed in porous silica through sol-gel chemistry
English
Heinrichs, Benoît mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Chimie physique appliquée > >]
Rebbouh, Leila [Université de Liège - ULg > Département de physique > > >]
Geus, John W [Universiteit Utrecht > > > >]
Lambert, Stéphanie mailto [Université de Liège > Département de chimie appliquée > Ingéniérie électrochimique >]
Abbenhuis, Hendrikus C L [Eindhoven University > > > >]
Grandjean, Fernande mailto [Université de Liège - ULg > Département de physique > Département de physique >]
Long, Gary J [University of Missouri-Rolla > > > >]
Pirard, Jean-Paul mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Chimie physique appliquée > >]
van Santen, Rutger A [Eindhoven University > > > > > >]
2008
Journal of Non-Crystalline Solids
Elsevier Science
354
2-9
665-672
Yes (verified by ORBi)
International
0022-3093
Amsterdam
The Netherlands
[en] magnetic behavior ; nano-clusters ; nanoparticles ; sol-gel (xerogels) ; iron ; Mossbauer effect and spectroscopy
[en] Fe/SiO2 catalysts have been prepared by two different sol-gel methods, cogelation and dissolution. The cogelation and dissolution preparative methods lead to xerogels with fundamentally different pore width distributions. The nature of the iron species obtained has been examined in detail by UN-visible and Mossbauer spectroscopy, and magnetic, transmission electron microscopy, and X-ray diffraction studies. There is no evidence for the presence of any ordered iron(III) oxides in the samples but all three contain two types of iron species, specifically paramagnetic high-spin iron(III) ions isolated in silica and iron(III) containing nanoparticles with a broad width distribution centered on 1.5 nm, nanoparticles that contain antiferromagnetically coupled clusters of a few ligated bridged iron(III) ions. (C) 2007 Elsevier B.V. All rights reserved.
http://hdl.handle.net/2268/19595
10.1016/j.jnoncrysol.2007.07.071

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