• Article dans une revue

Evidence for emission and transfer of energy from excited edge sites of MgO smokes by photoluminescence experiments.

Romain Hacquart, Jean-Marc Krafft, Guylène Costentin, Jacques Jupille

New features are observed in photoluminescence spectra of MgO smokes produced in controlled conditions, an experiment inspired by previous measurements on cleaved MgO(100). Upon photoexcitation at 5.17–5.45 eV, most luminescence spectra observed can be decomposed into two bands, peaking at 3.82–3.…

Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 2005, 595, pp.172-182. ⟨10.1016/j.susc.2005.08.009⟩. ⟨hal-00112145⟩

• Article dans une revue

Evolution of nickel speciation from aqueous solution to the surface of Ni/SiO2: effect of the number of chelating ligands in [Ni(en)x(H2O)6-2x]2+

Michel Che, Eric Marceau, Ke Qiang Sun

The evolution of nickel speciation during the successive preparation steps of Ni–SiO2 catalysts is studied by UV-Vis-NIR, FT-IR, DTG, TPR and TEM. The study focuses on the effect of the number of chelating ligands in the precursor complexes [Ni(en)x(H2O)(6 2x)]2+ (en = ethylenediamine, x = 1, 2, 3…

Physical Chemistry Chemical Physics, 2006, 8, pp.1731-1738. ⟨10.1039/b513319j⟩. ⟨hal-00109406⟩

• Article dans une revue

Zirconium-Substituted Isopolytungstates: Structural Models for Zirconia-Supported Tungsten Catalysts

Hugo Carabineiro, Richard Villanneau, Xavier Carrier, Patrick Herson, Francisco Lemos, Fernando Ramôa Ribeiro, Anna Proust, Michel Che

The synthesis and characterization of a series of mixed W-Zr polynuclear Lindqvist-type complexes, deriving from hexatungstate [W6O19]2-, are described in this work. This family of compounds is built from {W5O18Zr}2- moieties as shown by the X-ray structures of the monomeric [W5O18Zr(H2O)3-n(DMSO)n…

Inorganic Chemistry, 2006, 45, pp.1915-1923. ⟨10.1021/ic051941l⟩. ⟨hal-00084005⟩

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Mesoporous materials from zeolite seeds as supports for nickel-tungsten sulfide active phases: Part 2. Catalytic properties for deep hydrodesulfurization reactions

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

The properties of nickel-tungsten sulfide supported on MCM-41 aluminosilicate materials assembled from beta-zeolite seeds ([beta]-MCM-41) were examined in the conversion of 4,6-dimethyldibenzothiophene (4,6-DMDBT) pure or in mixture with dimethyldisulfide, carbazole and tetralin. As reported in the…

Applied Catalysis A : General, 2006, 298, pp.88-93. ⟨10.1016/j.apcata.2005.09.026⟩. ⟨hal-00080292⟩

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Nanocrystalline NbC formation from mesostructured niobium oxide studied by HRTEM, SAED and in situ XRD

S. Witkowski, M. Ruszak, Celine Sayag, J. Pielaszek, G. Djéga-Mariadassou

Mechanism of the nanometric size niobium carbide synthesis from mesostructured niobium oxide precursor is proposed. High-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) combined with in situ X-ray diffraction (XRD) were successfully used to study…

Applied Catalysis A : General, 2006, 307, pp.205-211. ⟨10.1016/j.apcata.2006.03.044⟩. ⟨hal-00128099⟩

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Beyond simple AB diblock copolymers: application of bifunctional and trifunctional RAFT agents to PISA in water

Gaëlle Mellot, Patricia Beaunier, Jean-Michel Guigner, Laurent Bouteiller, Jutta Rieger, François Stoffelbach

The influence of the macro-RAFT agent architecture on the morphology of the self-assemblies obtained by aqueous RAFT dispersion polymerization in PISA is studied by comparing amphiphilic AB diblock, (AB)2 triblock and triarm-star shaped (AB)3 copolymers, constituted of N,N-dimethylacrylamide (DMAc…

Macromolecular Rapid Communications, 2019, 25 (12), ⟨10.1002/marc.201800315⟩. ⟨hal-02404754⟩

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Highly Conductive Tungsten Suboxide Nanotubes

Cécile Huez, Maxime Berthe, Florence Volatron, Jean-Michel Guigner, Dalil Brouri, Lise-Marie Chamoreau, Benoît Baptiste, Dominique Vuillaume, Anna Proust

We demonstrate a high electron conductivity (> 10^2 S/cm and up to 10^3 S/cm) of tungsten suboxide W18O(52.4-52.9)(or equivalently WO(2.91-2.94)) nanotubes (2 to 3 nm in diameter, ca. micrometer long). The conductivity is measured in the temperature range 120 to 300K by a four probe scanning…

Journal of Applied Physics, 2023, 134, pp.134301. ⟨10.1063/5.0170761⟩. ⟨hal-04178947v2⟩

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A new method for elaborating mesoporous SiO 2 /montmorillonite composite materials

Khalil Tesnime Abou, Chaabene Semy Ben, Boujday Souhir, Blanchard Juliette, Bergaoui Latifa

We report the sol–gel preparation of SiO 2 / montmorillonite composite materials and the investigation of the effect of the amount of clay and the TEOS concentration on the textural and structural properties of the composites. Pre-swelling of the clay with cetyltrimethyl ammonium results in solids…

Journal of Sol-Gel Science and Technology, 2015, ⟨10.1007/s10971-015-3716-2⟩. ⟨hal-01226875⟩

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Adsorption of Amino Acids and Peptides on Metal and Oxide Surfaces in Water Environment: A Synthetic and Prospective Review

D. Costa, L. Savio, Claire-Marie Pradier

Amino acids and peptides are often used as “model” segments of proteins for studying their behavior in various types of environments, and/or elaborating functional surfaces. Indeed, though the protein behavior is much more complex than that of their isolated segments, knowledge of the binding mode…

Journal of Physical Chemistry B, 2016, 120 (29), pp.7039 - 7052. ⟨10.1021/acs.jpcb.6b05954⟩. ⟨hal-01548333⟩

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Novel nano-architectured water splitting photoanodes based on TiO2-nanorod mats surface sensitized by ZIF-67 coatings

W.M.A. El Rouby, M. Antuch, S.-M. You, P. Beaunier, P. Millet

International Journal of Hydrogen Energy, 2019, 44 (59), pp.30949-30964. ⟨10.1016/j.ijhydene.2019.08.220⟩. ⟨hal-04022360⟩