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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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Alammar, Tarek
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2017Microwave-Assisted Synthesis of Perovskite SrSnO3 Nanocrystals in Ionic Liquids for Photocatalytic Applicationscitations
- 2015Ionic Liquid-Assisted Sonochemical Preparation of CeO2 Nanoparticles for CO Oxidationcitations
- 2015Energy efficient microwave synthesis of mesoporous Ce0.5M0.5O2 (Ti, Zr, Hf) nanoparticles for low temperature CO oxidation in an ionic liquid - a comparative studycitations
- 2015Low-temperature route to metal titanate perovskite nanoparticles for photocatalytic applicationscitations
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article
Energy efficient microwave synthesis of mesoporous Ce0.5M0.5O2 (Ti, Zr, Hf) nanoparticles for low temperature CO oxidation in an ionic liquid - a comparative study
Abstract
<p>Ce<sub>0.5</sub>M<sub>0.5</sub>O<sub>2</sub> (M = Ti, Zr, Hf) nanoparticles have been successfully synthesized by microwave irradiation in the ionic liquid [C<sub>4</sub>mim][Tf<sub>2</sub>N] (1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide). The morphology, crystallinity, and chemical composition of the obtained materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), Raman spectroscopy, and N<sub>2</sub>-adsorption measurements. XRD and Raman spectroscopy analyses confirmed the formation of solid solutions with cubic fluorite structure. The catalytic activities of the Ce<sub>0.5</sub>M<sub>0.5</sub>O<sub>2</sub> (M = Ti, Zr, Hf) nanoparticles were investigated in the lowerature oxidation of CO. Ce<sub>0.5</sub>Zr<sub>0.5</sub>O<sub>2</sub> nanospheres exhibit the best performance (100% conversion at 350 °C), followed by Ce<sub>0.5</sub>Hf<sub>0.5</sub>O<sub>2</sub> (55% conversion at 360 °C) and Ce<sub>0.5</sub>Ti<sub>0.5</sub>O<sub>2</sub> (11% conversion at 350 °C). Heating the as-prepared Ce<sub>0.5</sub>Zr<sub>0.5</sub>O<sub>2</sub> to 600 °C for extended time leads to a decrease in surface area and, as expected decreased catalytic activity. Depending on the ionic liquid the obtained Ce<sub>0.5</sub>Zr<sub>0.5</sub>O<sub>2</sub> exhibits different morphologies, varying from nano-spheres in [C<sub>4</sub>mim][Tf<sub>2</sub>N] and [P<sub>66614</sub>][Tf<sub>2</sub>N] (P<sub>66614</sub> = trishexyltetradecylphosphonium) to sheet-like assemblies in [C<sub>3</sub>mimOH][Tf<sub>2</sub>N] (C<sub>3</sub>mimOH = 1-(3-hydroxypropyl)-3-methylimidazolium). The microwave synthesis superiority to other heating methods like sonochemical synthesis and conventional heating was proven by comparative experiments where the catalytic activity of Ce<sub>0.5</sub>Zr<sub>0.5</sub>O<sub>2</sub> obtained by alternate methods such as conventional heating was found to be poorer than that of the microwave-synthesised material.</p>