Laboratoire de réactivité de surface

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  • Article dans une revue

Effect of Ca-doping on microstructure and photocatalytic activity of ZnO nanoparticles synthesized by sol gel method

R. Slama, J. El Ghoul, K. Omri, A. Houas, L. El Mir, Franck Launay

We report the synthesis of Zn1−xCaxO nanoparticles prepared by a sol–gel processing technique for x ranging from 0 to 0.05. The structural, morphological and optical properties of the nanoparticles were investigated by X-ray diffraction, transition electron microscopy, UV measurements, and…

Journal of Materials Science: Materials in Electronics, 2016, 27 (8), pp.7939 - 7946. ⟨10.1007/s10854-016-4786-9⟩. ⟨hal-01548339⟩

  • Article dans une revue

Non-Hydroxyl Radical Species Production during Dark Air Oxidation of Alluvial Soils

Elora Bourbon, Frédéric Averseng, Pierre Le Pape, Thierry Allard, Fulvia Baratelli, Fabrice Alliot, Alexandre Gélabert, Valentine Rollot, Elodie Guigon, Jessica Brest, Sylvie Nélieu, Guillaume Morin

Natural environments subjected to hydrologically-driven redox fluctuations are regarded as propitious to contaminant degradation since they favor cyclic oxygenation of Fe(II)-minerals that produces oxidizing reactive species, such as the hydroxyl radical, OH • . However, the identity of these…

ACS Earth and Space Chemistry, 2024, 8 (9), pp.1757-1770. ⟨10.1021/acsearthspacechem.4c00113⟩. ⟨hal-04744483⟩

  • Article dans une revue

Polypyrrole nanostructures modified with mono- and bimetallic nanoparticles for photocatalytic H2 generation

Xiaojiao Yuan, Diana Dragoe, Patricia Beaunier, Daniel Bahena Uribe, Laurence Ramos, Maria Guadalupe Méndez-Medrano, Hynd Remita

Conjugated polymer polypyrrole nanostructures modified with bimetallic (Pt–Ni) nanoparticles are very active for hydrogen generation and a synergetic effect is obtained by alloying Pt with Ni.

Journal of Materials Chemistry A, 2020, 8 (1), pp.268-277. ⟨10.1039/C9TA11088G⟩. ⟨hal-03437340⟩

  • Article dans une revue

The Mosaic Structure of Zeolite Crystals

Zhengxing Qin, Georgian Melinte, Jean-Pierre Gilson, Maguy Jaber, Krassimir Bozhilov, Philippe Boullay, Svetlana Mintova, Ovidiu Ersen, Valentin Valtchev

Zeolites are widely used in many commercial processes, mostly as catalysts or adsorbents. Understanding their intimate structure at the nanoscale is the key to control their properties and design the best materials for their ever increasing uses. Herein, we report a new and controllable fluoride…

Angewandte Chemie International Edition, 2016, 55 (48), pp.15049-15052. ⟨10.1002/anie.201608417⟩. ⟨hal-02410439⟩

  • Article dans une revue

Chemical Modifications of Au/SiO2 Template Substrates for Patterned Biofunctional Surfaces

Elisabeth Briand, Vincent Humblot, Jessem Landoulsi, Sarunas Petronis, Claire-Marie Pradier, Bengt Kasemo, Sofia Svedhem

The aim of this work was to create patterned surfaces for localized and specific biochemical recognition. For this purpose, we have developed a protocol for orthogonal and material-selective surface modifications of microfabricated patterned surfaces composed of SiO2 areas (100 mu m diameter)…

Langmuir, 2011, 27 (2), pp.678-685. ⟨10.1021/la101858y⟩. ⟨hal-00602936⟩

  • Article dans une revue

BEA zeolite modified with iron as effective catalyst for N2O decomposition and selective reduction of NO with ammonia

Pawel Boron, Lucjan Chmielarz, J. Gurgul, K. Łątka, Tetsuya Shishido, J.M. Krafft, Stanislaw Dzwigaj

BEA zeolite is modified by a two-steps postsynthesis method allowing incorporate iron atoms into the zeolite framework. Two series of the zeolite samples with aluminium (FexAlSiBEA) and without aluminium (FexSiBEA), containing various iron content (0.5-4.0 Fe wt.%) are obtained. For low Fe content…

Applied Catalysis B: Environmental, 2013, 138-139, pp.434-445. ⟨10.1016/j.apcatb.2013.03.022⟩. ⟨hal-00911026⟩

  • Article dans une revue

Preparation of thin film gold based catalysts for oxidation reactions in liquid and gas phases

Anne-Félicie Lamic-Humblot, Philippe Barthe, Guillaume Guzman, Laurent Delannoy, Catherine Louis

This work deals with the preparation of gold on titania catalysts to make catalytic films in the less than 100 nm thickness area and its comparison with usual powder catalyst in catalytic oxidation reactions in gas and liquid phases. Titania was coated on glass plates with different thicknesses,…

Thin Solid Films, 2012, 527, pp.96-101. ⟨10.1016/j.tsf.2012.11.096⟩. ⟨hal-00906344⟩

  • Article dans une revue

Remarkable activity of Ag/Al2O3/cordierite catalysts in SCR of NO with ethanol and butanol

Pavlo Kyriienko, Nataliia Popovych, Sergiy Soloviev, Svitlana Orlyk, Stanislaw Dzwigaj

Structured silver-alumina catalysts were prepared by the one-step deposition of Al2O3 directly on the surface of cordierite block matrices with subsequent incipient wetness impregnation of Al2O3/cordierite with an AgNO3 aqueous solution. The catalysts were characterized by BET, XRD, XPS and FTIR…

Applied Catalysis B: Environmental, 2013, 140-141, pp.691-699. ⟨10.1016/j.apcatb.2013.04.067⟩. ⟨hal-00911716⟩

  • Article dans une revue

The similarities and differences in structural characteristics and physico-chemical properties of AgAlBEA and AgSiBEA zeolites

Stanislaw Dzwigaj, Nataliia Popovych, Pavlo Kyriienko, Jean-Marc Krafft, Sergiy Soloviev

AgAlBEA and AgSiBEA zeolites have been prepared by two preparation procedures. The conventional wet impregnation is used to obtain AgAlBEA with silver present mainly in extra-framework position. The two-step postsynthesis procedure which consists of first creating the vacant T-atom sites with…

Microporous and Mesoporous Materials, 2013, 182, pp.16-24. ⟨10.1016/j.micromeso.2013.08.009⟩. ⟨hal-00907753⟩

  • Article dans une revue

Low temperature dry methane reforming over Ce, Zr and CeZr promoted Ni–Mg–Al hydrotalcite-derived catalysts

Radosław Dębek, Maria Elena Galvez, Franck Launay, Monika Motak, Teresa Grzybek, Patrick da Costa

Hydrotalcite derived catalysts promoted with Ce, Zr and CeZr showed considerable activity in dry methane reforming (DMR) at low temperatures (550°C). Direct methane decomposition resulting in the extensive formation of fishbone-type carbon nanofibers was substantially inhibited in the presence of…

International Journal of Hydrogen Energy, 2016, 41 (27), pp.11616-11623. ⟨10.1016/j.ijhydene.2016.02.074⟩. ⟨hal-01289149⟩