References of "Pirard, Jean-Paul"
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See detailXérogels de carbone à base de résorcinol-formaldéhyde en tant que matériaux d’anode pour batterie Li-ion; Synthèse et broyage avec contrôle de la granulométrie
Piedboeuf, Marie-Laure ULg; Léonard, Alexandre ULg; Pirard, Jean-Paul ULg et al

Conference (2013, May)

Xérogels de carbone à base de résorcinol-formaldéhyde en tant que matériaux d’anode pour batteries Li-ion : synthèse et broyage avec contrôle de la granulométrie Les xérogels de carbone sont des candidats ... [more ▼]

Xérogels de carbone à base de résorcinol-formaldéhyde en tant que matériaux d’anode pour batteries Li-ion : synthèse et broyage avec contrôle de la granulométrie Les xérogels de carbone sont des candidats prometteurs en tant que matériaux d’anodes de batterie Li-ion étant donné que leur faible variation de volume lors des cycles de charge-décharge devrait conduire à une durée de vie plus élevée. Néanmoins, du fait de leur morphologie fort différente de celle du graphite, tout un travail de mise au point du dépôt sur collecteur de courant se doit d’être effectué. Une partie de cette étude consiste à contrôler la granulométrie des particules issues du processus de broyage préalable à la préparation d’une encre. Dans ce travail, quatre xérogels de carbone de textures différentes ont été synthétisés et deux méthodes de broyage ont été utilisées pour réduire la taille des monolithes obtenus après synthèse. Les premiers résultats indiquent que la méthode de broyage n’a pas d’influence sur la distribution de la taille des particules et la structure des matériaux est bien conservée pour des particules de taille allant jusqu’au micromètre. [less ▲]

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See detailThe multiple SEA method: a method to synthesize Pt/carbon xerogel catalysts for Proton Exchange Membrane Fuel Cells (PEMFC)
Zubiaur, Anthony ULg; Chatenet, Marian; Maillard, Frédéric et al

Poster (2013, April)

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See detailPhysico-chemical properties and photocatalytic activity of calcined P-doped and P/Ag-doped TiO2 xerogels
Bodson, Céline; Pirard, Sophie ULg; Pirard, René ULg et al

Conference (2013, March 05)

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See detailSol-gel preparation and characterisation of SnO<inf>2</inf>powders employed as catalyst for phenol photodegradation
Benhebal, H.; Chaib, M.; Léonard, Angélique ULg et al

in Scientia Iranica (2013), 20(6), 1891-1898

Crystallized pure SnO<inf>2</inf>powders were prepared by the sol-gel process, and were used as photocatalyst for the degradation of phenol under UV light at pH 6.5 and a temperature of 20°C. The physical ... [more ▼]

Crystallized pure SnO<inf>2</inf>powders were prepared by the sol-gel process, and were used as photocatalyst for the degradation of phenol under UV light at pH 6.5 and a temperature of 20°C. The physical properties of photocatalyst were characterized by X-ray diffraction, Scanning Electron Microscopy, nitrogen adsorption-desorption and Ultravioletvisible diffuse reectance spectroscopy. The inuences of different operating variables, such as the pH, the photocatalyst loading, and the initial concentration of phenol, were studied to improve the efficiency of phenol degradation. © 2013 Sharif University of Technology. All rights reserved. [less ▲]

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See detailSol-gel preparation and characterisation of SnO2 powders employed as catalyst for phenol photodegradation
Benhebal, Hadj; Chaib, Messaoud; Léonard, Angélique ULg et al

in Scientia Iranica (2013), 20(6), 1891-1898

Crystallized pure SnO2 powders were prepared by the sol-gel process and were used as photocatalyst for the degradation of phenol under UV light at pH 6.5 and a temperature of 20°C. The physical properties ... [more ▼]

Crystallized pure SnO2 powders were prepared by the sol-gel process and were used as photocatalyst for the degradation of phenol under UV light at pH 6.5 and a temperature of 20°C. The physical properties of photocatalyst were characterized by X-ray diffraction, Scanning Electron Microscopy, nitrogen adsorption-desorption and Ultraviolet-visible diffuse reflectance spectroscopy. The influences of different operating variables such as the pH, the photocatalyst loading, the initial concentration of phenol, were studied to improve the efficiency of phenol degradation. [less ▲]

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See detailXPS structural characterization of Pd/SiO2 catalysts prepared by cogelation
Beketov, Gennadiy; Heinrichs, Benoît ULg; Pirard, Jean-Paul ULg et al

in Applied Surface Science (2013), 287

Nanostructured Pd/SiO2xerogel catalysts prepared via cogelation were characterized by X-ray photo-electron spectroscopy. The preparation route allowed highly porous silica particles to be formed alongwith ... [more ▼]

Nanostructured Pd/SiO2xerogel catalysts prepared via cogelation were characterized by X-ray photo-electron spectroscopy. The preparation route allowed highly porous silica particles to be formed alongwith embedded Pd nanocrystals. After heat-treating the catalysts in vacuum, Pd was found to be in themetallic state. To obtain information on the xerogel catalyst texture and, in particular, on the size of thesilica particles, a theoretical formalism was developed based on measuring the relative intensities of Pd 3ddoublet and the associated background tail due to inelastically scattered photoelectrons. The suggestedprocedure also involved the measurement of the background tails accompanying Si 2p and O 1s spectrallines as internal standards. Using the developed formalism, the size of the silica particles in the catalystsafter different treatments was evaluated and compared with TEM data. The results obtained indicate thatthe textural properties of the sol–gel catalysts start to develop already at the level of co-condensation ofalkoxides with the network-forming reagent. Calcination causes these properties to run to completion. [less ▲]

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See detailCatalytic layer for PEMFC based on carbon xerogels
Deschamps, Fabien ULg; Traina, Karl; Pirard, Jean-Paul ULg et al

in Proceedings of the Fundamentals and Development of Fuel cells 2013 conference (2013)

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See detailPropriétés physicochimiques et électrochimiques de catalyseurs Pt/xérogel de carbone synthétisés par la méthode de SEA multiple.
Zubiaur, Anthony ULg; Chatenet, M.; Maillard, F. et al

Conference (2012, October 01)

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See detailCarbon nanotube synthesis by CCVD process: kinetic study on a Ni-Mo/MgO catalyst
Douven, Sigrid ULg; Pirard, Sophie ULg; Chan, Fang-Yue et al

Poster (2012, October)

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See detailAdsorption du bleu de méthylène sur des xérogels de carbone activés
Páez Martínez, Carlos ULg; Contreras, Soledad; Léonard, Angélique ULg et al

Poster (2012, October)

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See detailSynthèse de MWNT dans un réacteur continu incliné rotatif à lit mobile par procédé CCVD
Douven, Sigrid ULg; Pirard, Sophie ULg; Chan, Fang-Yue et al

Conference (2012, October)

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See detailUse of new surface active carbohydrate esters for the synthesis of polyhipes in supercritical CO2
Boyère, Cédric ULg; Favrelle, Audrey; Grignard, Bruno ULg et al

Poster (2012, September 10)

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See detailSynthesis of microsphere-loaded porous polymers by combining emulsion and dispersion polymerisations in supercritical carbon dioxide
Boyère, Cédric ULg; Léonard, Alexandre ULg; Grignard, Bruno ULg et al

in Chemical Communications (2012), 48(67), 8356-8358

Highly porous materials were produced by acrylamide polymerisation templated by supercritical CO2-in-water emulsions using new fluorinated glycosurfactants. Properties of the resulting polymer scaffolds ... [more ▼]

Highly porous materials were produced by acrylamide polymerisation templated by supercritical CO2-in-water emulsions using new fluorinated glycosurfactants. Properties of the resulting polymer scaffolds were tuned by performing dispersion polymerisations within their cavities filled with supercritical CO2. [less ▲]

Detailed reference viewed: 63 (21 ULg)