| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Van Santen, Rutger
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2011DFT studies of hydrogen storage properties of Mg0.75Ti0.25citations
- 2010Nanostructures of Mg0.65Ti0.35Dx studied with X-ray diffraction, neutron diffraction and magic-angle-spinning 2H NMR spectroscopycitations
- 2010Reactivity and selectivity of heterogenized homogeneous catalysts: insights from molecular simulationscitations
- 2009Nanorod calculations on body-centered cubic iron : a method for estimation of size-dependent surface energies of metal nanocrystalscitations
- 2008CO Dissociation on the Ru(1121) Surfacecitations
- 2007Enantioselectivity of immobilized Mn-salen complexes : a computational studycitations
- 2007An efficient hybrid, nanostructured, epoxidation catalyst: titanium silsesquioxane-polystyrene copolymer supported on SBA-15citations
- 2006Characterization and reactivity of Ga+ and GaO+ cations in zeolite ZSM-5citations
- 2003Characterization of Ga/HZSM-5 and Ga/HMOR synthesized by chemical vapor deposition of trimethylgalliumcitations
- 2002Synthesis and characterization of microporous Fe-Si-O materials with tailored iron content from silsesquioxane precursorscitations
- 2002PEG-mediated silica pore formation monitored in situ by USAXS and SAXS: Systems with properties resembling diatomaceous silicacitations
- 2002Synthesis and characterisation of microporous bimetallic Fe-Cr-Si-O materials derived from silsesquioxane precursorscitations
- 2001Microporous Mg-Si-O and Al-Si-O Materials Derived from Metal Silsesquioxanescitations
- 2001Synthesis, structural characterization, and transmetalation reactions of a tetranuclear magnesium silsesquioxane complexcitations
- 2001Intermediate species and reaction pathways for the oxidation of ammonia on powdered catalystscitations
- 2000Characterization of the microporosity of chromia- and titania-pillared montmorillonites differing in pillar density. I. Adsorption of nitrogencitations
Places of action
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article
Synthesis and characterization of microporous Fe-Si-O materials with tailored iron content from silsesquioxane precursors
Abstract
Calcination of mixtures of (c-C5H9)(7)Si7O9(OH)(3), 1, and (c-C5H9)(7)Si7O12Fe(tmeda), 2 (tmeda = N,N,N',N',-tetramethylethylenediamine), led to microporous amorphous Fe-Si-O materials with adjustable iron content in the range 1-11 wt %. A set of different complementary techniques including N-2 physisorption, XRD, XPS, DRUV-vis, RS, IR, HRTEM, and Mossbauer spectroscopy was used to follow the variation of the textural properties, metal dispersion, and speciation with the iron content along the whole mixing series. The calcination of these mixtures produced Fe-Si-O materials having basically the same properties as those observed for the individually calcined iron silsesquioxane. The N2 physisorption indicates high surface areas, rather large pore volumes, and a very narrow pore size distribution with an average pore size diameter around 6-7 Angstrom. The TEM and the spectroscopic analysis of the Fe-Si-O materials indicate that the iron is present mainly as small iron oxide particles highly dispersed throughout silica and to a minor extent as clustered and isolated species. The particle size distribution was estimated to be about 2-8 nm for 11% Fe-Si-O and 2-4 nm for samples with lower iron content. These materials showed catalytic activity in NH3 oxidation and N2O decomposition