| 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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Abdelmoula, Mustapha
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2019Starch functionalized magnetite nanoparticles: New insight into the structural and magnetic propertiescitations
- 2019Starch functionalized magnetite nanoparticles: New insight into the structural and magnetic propertiescitations
- 2019Structure of single sheet iron oxides produced from surfactant interlayered green rustscitations
- 2018Abiotically or microbially mediated transformations of magnetite by sulphide species: The unforeseen role of nitrate-reducing bacteriacitations
- 2017Shale Of The Ivory Coast As A Filtration Material For Phosphate Removal From Waste Water
- 2017Biogenic Mineral Precipitation during Antimony bearing Ferrihydrite bioreduction
- 2012Application of magnetite catalyzed chemical oxidation (Fenton-like and persulfate) for the remediation of oil hydrocarbon contaminationcitations
- 2010In situ oxidation of green rusts by deprotonation; wet corrosion and passivation of weathering steelscitations
- 2009Arsenite sequestration at the surface of nano-Fe(OH)2, ferrous-carbonate hydroxide, and green-rust after bioreduction of arsenic-sorbed lepidocrocite by Shewanella putrefacienscitations
- 2009Arsenite sequestration at the surface of nano-Fe(OH)2, ferrous-carbonate hydroxide, and green-rust after bioreduction of arsenic-sorbed lepidocrocite by Shewanella putrefacienscitations
- 2008Aluminium substitution in iron(II–III)-layered double hydroxides: Formation and cationic ordercitations
- 2008Comparative studies of ferric green rust and ferrihydrite coated sand: Role of synthesis routescitations
Places of action
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article
Structure of single sheet iron oxides produced from surfactant interlayered green rusts
Abstract
Ultrathin iron oxide particles are of high interest due to their large surface areas and unusual physical and chemical properties. Previous works have shown that single sheet iron oxides (SSI) can be formed via delamination of oxidized layered iron (hydr)oxides (green rusts, GR) interlayered by dodecanoate. However, there is considerable uncertainty on the true structure of both starting material and final products, and the reaction pathway. In this work, we describe a robust method for SSI synthesis and provide detailed structural characterization of the initial, intermediate and final phases to decipher the reaction mechanism. The SSI product has the formula FeO0.82(OH)1.38·0.7H2O, and consists of platelets with a height of 1 nm and lateral dimensions of 20 to 100 nm as observed by Atomic Force Microscopy and Transmission Electron Microscopy. Mössbauer spectroscopy from 300 to 9 K shows that SSI is distinct from goethite, ferrihydrite and feroxyhite. Pair distribution function (PDF) analysis of high energy X-ray scattering data reveals that SSI has two distinct nearest neighbor FeFe distances in contrast to the single distance in the parent FeII-FeIII (hydr)oxide composed of entirely edge-sharing octahedra. Modeling of the SSI PDF data indicates that oxidation of FeII to FeIII of dodecanoate-intercalated green rust results in displacements of Fe atoms perpendicular from the parent iron (hydr)oxide layer, forming a material that consists of iron polyhedra linked by both corner- and edge-sharing. This model which is different from the previously published model, matches the measured SSI thickness and electron diffraction pattern. This elucidated reaction pathway confirms that the dodecanoate interlayers in GR hinders Fe polymerization across interlayers and thus restrict chemical transformations to largely two-dimensional space. The increase of single- and double- coordinated O/OH groups in the SSI compared with the parent GRs is expected to give a high reactivity of SSI as surface complexation sorbents.