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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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Su, Bao-Lian
University of Namur
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2022Low-pressure plasma process for the dry synthesis of cactus-like Au-TiO2 nanocatalysts for toluene degradationcitations
- 2021BN‐doped metal–organic frameworks: tailoring 2D and 3D porous architectures through molecular editing of borazinescitations
- 2020UV scattering by pores in avian eggshellscitations
- 2020Scattering of ultraviolet light by avian eggshellscitations
- 2020Immobilization of a Molecular Re Complex on MOF-derived Hierarchical Porous Carbon for CO2 Electroreduction in Water/Ionic Liquid Electrolytecitations
- 2019Radiative and non radiative recombinations study in the novel nanocomposites BiVO 4 /3DOM-TiO 2 , ZnO/3DOM-TiO 2 and BiVO 4 /3DOM-ZnOcitations
- 2016ZnO quantum dots decorated 3DOM TiO2 nanocompositescitations
- 2015Single-walled metal-organic nanotube built from a simple synthoncitations
- 2015Novel 3DOM BiVO4/TiO2 nanocomposites for highly enhanced photocatalytic activitycitations
- 2015Generalized approach to the microstructure direction in metal oxide ceramics via polymerization-induced phase separationcitations
- 2015Experimental and theoretical study of optical properties and quantum size phenomena in the BiVO4/TiO2 nanostructurescitations
- 2014Synthesis of novel mesoporous ZnO/SiO2 composites for the photodegradation of organic dyescitations
- 2013A comprehensive study of the reaction parameters involved in the synthesis of Silica thin films with well-ordered uni-directional mesoporescitations
- 2012Catalytic performance of core-shell and alloy Pd-Au nanoparticles for total oxidation of VOCcitations
- 2011Whole-cell based hybrid materials for green energy production, environmental remediation and smart cell-therapycitations
- 2011Structure and surface chemistry in crystalline mesoporous (CeO -δ)-YSZcitations
- 2011(Di)-aminoguanidine functionalization through transaminationcitations
- 2011Superlative scaffold of 1,2,4-triazole derivative of glycine steering linear chain to a chiral helicatecitations
- 2011(Di)-aminoguanidine Functionalization through Transamination: An Avenue to an Auspicious Class of Supramolecular Synthonscitations
- 2011Influence of the meso-macroporous ZrO -TiO calcination temperature on the pre-reduced Pd/ZrO -TiO (1/1) performances in chlorobenzene total oxidationcitations
- 2010Engineering three-dimensional chains of porous nanoballs from a 1,2,4-triazole-carboxylate supramolecular synthoncitations
- 2010Effect of nonionic surfactants on structure, texture, and morphology of titania-doped YSZcitations
- 2009Quantum Size Effect and very localized random laser in ZnO@mesoporous silica nanocomposite following a two-photon absorption processcitations
- 2008Removal of evans blue by using nickel-iron layered double hydroxide (LDH) nanoparticlescitations
- 2007Nanosized ZnO confined inside a Faujasite X zeolite matrixcitations
- 2007Nanosized ZnO confined inside a Faujasite X zeolite matrix:Characterization and optical propertiescitations
- 2007New phenomenon in the channels of mesoporous silicate CMI-1: quantum size effect and two-photon absorption of ZnO nanoparticlescitations
Places of action
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article
Influence of the meso-macroporous ZrO -TiO calcination temperature on the pre-reduced Pd/ZrO -TiO (1/1) performances in chlorobenzene total oxidation
Abstract
The effect of two calcining temperatures (400 °C, 600 °C) on the texture, structure and thermal stability of a meso-macroporous ZrO-TiOof equal molar amount (ZrTi; x = 4, 6) synthesized from hydrothermal conditions using a surfactant and metal alkoxide precursors was studied. Pd (0.5 wt.%) was dispersed on these innovative supports (Pd/ZrTi; x = 4, 6) by a classic wet impregnation and calcined at 400 °C. The resulting catalysts were characterized by Elemental analysis (EA), X-Ray Diffraction (XRD), Nadsorption-desorption, H-Temperature Programmed Reduction (H-TPR), Pd dispersion and tested as pre-reduced in the total oxidation of chlorobenzene. It was found that the calcination temperature did not provoke a significant effect on the physicochemical properties of the resulting binary oxide except the acidity which significantly decreased. The support was stable against phase transformation upon calcination as no crystalline phase could be detected indicating a homogeneous mixing of the Zr and Ti components. The Specific Surface Areas (SSAs) were superior to 400 m/g even after calcination at 600 °C. The Pd dispersion was around 40% and the palladium was totally reduced before catalytic testing. Lowering the temperature of calcination of the support enhanced the performances of the catalyst. Indeed PhCl conversion increased as the calcination temperature decreased and correlates with the Pd dispersion and SSA of the catalyst. A significant amount of polychlorinated benzenes PhCl(x = 2-6) was detected in the course of the reaction which practically disappeared at 100% PhCl conversion. This amount was reduced by a factor 2 as the temperature of calcination decreased. Compared to the performances of Pd/Tiand Pd/Zrfor the same reaction, all things being kept equal, calcined ZrO-TiOsupports show higher surface areas and higher thermal stability than their ZrOand TiOcounterparts. In terms of activity for PhCl total oxidation based on Tvalues the ZrO-TiOsupports showed an intermediate behaviour while a beneficial effect was observed regarding the by-products production which is the lowest herein for the Pd/TiZrcatalyst.