• Article dans une revue

Ex-nitrate Co/SBA-15 catalysts prepared with calibrated silica grains: Information given by TPR, TEM, SAXS and WAXS

F. Boubekr, A. Davidson, S. Casale, P. Massiani

The aim of the present work was to check for the presence of an ordered array of Co-based nanoparticles in catalysts prepared by impregnation and by using the two-solvents technique with pentane and cyclohexane on a single SBA-15 batch (prepared by precipitation in strongly acidic conditions (HCl 2…

Microporous and Mesoporous Materials, 2011, 141 (1-3), pp.157-166. ⟨10.1016/j.micromeso.2010.10.038⟩. ⟨hal-00602696⟩

• Article dans une revue

Microcalorimetric and thermodynamic studies of CO2 and methanol adsorption on magnesium oxide

C. Pighini, Thomas Belin, Jerome Mijoin, Patrick Magnoux, Guylene Costentin, Helene Lauron-Pernot

Both Lewis and Bronsted basic properties of magnesium oxide (MgO) are, respectively, studied by adsorption of CO2 and methanol CH3OH. Various chemical synthesis of pure magnesium oxide (commercial, sol-gel and precipitation methods) are used. The influence of small amounts of alkaline (Na+ and Li…

Applied Surface Science, 2011, 257 (15), pp.6952-6962. ⟨10.1016/j.apsusc.2011.03.040⟩. ⟨hal-00602947⟩

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Ta(V)-Single Site BEA Zeolite by Two-Step Postsynthesis Method: Preparation and Characterization

Stanislaw Dzwigaj, Yannick Millot, Michel Che

Ta(1.0)SiBEA and Ta(2.0)SiBEA zeolites are prepared by a two-step postsynthesis method involving first the creation of vacant T-atom sites associated with silanol groups by dealumination of TEABEA zeolite with nitric acid and then the impregnation of the resulting SiBEA zeolite with tantalum…

Catalysis Letters, 2010, 135 (3-4), pp.169-174. ⟨10.1007/s10562-010-0284-5⟩. ⟨hal-00604713⟩

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Self-Organization and/or Nanocrystallinity of Co Nanocrystals Effects on the Oxidation Process Using High-Energy Electron Beam

Ana Cazacu, Claudio Larosa, Patricia Beaunier, Guillaume Laurent, Paolo Nanni, Liliana Mitoseriu, Isabelle Lisiecki

The enhanced stability of Co nanocrystals (NCs) when they are highly ordered at both nanometer and micrometer scales is reported. For the first time, it is shown that both the crystalline structure of Co nanoparticles (NPs) and their 2D hexagonal organization have a significant impact on the…

Advanced Functional Materials, 2014, 24 (1), pp.164-170. ⟨10.1002/adfm.201301465⟩. ⟨hal-01078026⟩

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Vibrational and electrical investigations of a uniaxially stretched polystyrene/carbon nanotube composite

Liliane Bokobza, Gilles Garnaud, Patricia Beaunier, Jean-Luc Bruneel

Multiwall carbon nanotube (MWCNT)/polystyrene (PS) composite materials were prepared in the absence and in the presence of a surfactant. TEM analysis reveals the formation of chains made of several nanotubes tied up together upon application of the surfactant while an almost random distribution is…

Vibrational Spectroscopy, 2013, 67, pp.6-13. ⟨10.1016/j.vibspec.2013.03.002⟩. ⟨hal-00914572⟩

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Mesoporous materials from zeolite seeds as supports for nickel tungsten sulfide active phases Part 1. Characterization and catalytic properties in hydrocracking reactions

Shuangqin Zeng, Juliette Blanchard, Michèle Breysse, Dadong Li, Hong Nie, Yahua Shib, Xintian Su

MCM-41 aluminosilicate mesostructures (Si/Al = 18) with hexagonal long-range order were assembled from protozeolitic nanoclusters (zeolite seeds) that normally nucleate the crystn. of b-zeolite (BEA). Depending on the duration of the thermal treatment leading to the zeolite seeds, different acidic…

Applied Catalysis A : General, 2005, 294, pp.59-67. ⟨10.1016/j.apcata.2005.07.015⟩. ⟨hal-00080297⟩

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Catalytic performances of platinum doped molybdenum carbide for simultaneous hydrodenitrogenation and hydrodesulfurization

Marek Lewandowski, Agnieszka Szymanska-Kolasa, Patrick da Costa, Celine Sayag

The hydrotreating activity of molybdenum carbide doped with platinum (0.3 wt.%) was studied and compared to that of a pure, non-modified Mo2C. 4,6-Dimethyldibenzothiophene (4,6-DMDBT, 300 ppm of S) and carbazole (100 ppm of N) were designated as model compounds and subjected to hydrodesufurization…

Catalysis Today, 2006, 119, pp.31-34. ⟨10.1016/j.cattod.2006.08.062⟩. ⟨hal-00128076⟩

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Conducting polymer nanofibers with controlled diameters synthesized in hexagonal mesophases

Srabanti Ghosh, Laurence Ramos, Samy Remita, Alexandre Dazzi, Ariane Deniset-Besseau, Patricia Beaunier, Fabrice Goubard, Pierre-Henri Aubert, Hynd Remita

Oil-swollen hexagonal mesophases resulting from the surfactant mediated self-assembly of a quaternary mixture of water, surfactant, co-surfactant, and oil, are versatile templates to synthesize anisotropic nanomaterials. Poly(diphenylbutadyine) (PDPB) polymer nanofibrous network structures were…

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Influence of the support composition and acidity on the catalytic properties of mesoporous SBA-15, Al-SBA-15, and Al2O3-supported Pt catalysts for cinnamaldehyde hydrogenation

Soraya Handjani, E. Marceau, Juliette Blanchard, Jean-Marc Krafft, Michel Che, Päivi Mäki-Arvela, Narendra Kumar, Johan Wärnå, Dmitry Yu. Murzin

Journal of Catalysis, 2011, 282 (1), pp.228-236. ⟨10.1016/j.jcat.2011.06.017⟩. ⟨hal-03032153⟩

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Towards metal free supported quaternary ammonium halides catalysts for an optimized cycloaddition of CO 2 onto styrene oxide

Miguel Alonso de La Peña, Matthieu Balas, Julie Kong, Richard Villanneau, Lorraine Christ, A. Tuel, Franck Launay

The present work reports on a large selection of porous siliceous materials functionalised by quaternary ammonium salts (QAS) with various pores structures, possible doping with Zn2+, and different ammonium salt substituents as well as halide counter-ions. After characterization by TGA, N2…

Catalysis science and Technology, 2024, 14 (5), pp.1305-1317. ⟨10.1039/d3cy01551c⟩. ⟨hal-04562849⟩