• Article dans une revue

Cyanobacterial formation of intracellular Ca-carbonates in undersaturated solutions

Nithavong Cam, Karim Benzerara, Thomas Georgelin, Maguy Jaber, Jean-François Lambert, Mélanie Poinsot, Fériel Skouri-Panet, David Moreira, Purificacion Lopez-Garcia, Emmanuelle Raimbault, Laure Cordier, Didier Jezequel

Cyanobacteria have long been thought to induce the formation of Ca-carbonates as secondary by-products of their metabolic activity, by shifting the chemical composition of their extracellular environment to conditions favoring mineral precipitation. Some cyanobacterial species forming Ca-carbonates…

Geobiology, 2018, 16 (1), pp.49-61. ⟨10.1111/gbi.12261⟩. ⟨hal-01655173⟩

• Article dans une revue

Stabilisation of small mono- and bimetallic gold–silver nanoparticles using calix[8]arene derivatives

Priyanka Ray, Marie Clément, Cyril Martini, Ibrahim Abdellah, Patricia Beaunier, José-Luis Rodriguez-Lopez, Vincent Huc, Hynd Remita, Isabelle Lampre

In this paper, we report the synthesis of octa(hydroxy)-octa(mercaptobutoxy)calix[8]arene and its use as a stabiliser of nanoparticles (NPs). We show that the reduction of gold and/or silver ions in the presence of this calix[8]arene in ethanolic solutions leads to the formation of very small…

New Journal of Chemistry, 2018, 42 (17), pp.14128-14137. ⟨10.1039/C8NJ02451K⟩. ⟨hal-02399078⟩

• Article dans une revue

The structural and the photoelectrochemical properties of ZnO–ZnS/ITO 1D hetero-junctions prepared by tandem electrodeposition and surface sulfidation: on the material processing limits

A. Brayek, S. Chaguetmi, M. Ghoul, I. Ben Assaker, R. Chtourou, P. Decorse, P. Beaunier, S. Nowak, F. Mammeri, S. Ammar

ZnO–ZnS 1D hetero-nanostructures were prepared by an easy and scalable processing route. It consists of ZnO nanorod electrodeposition on ITO substrate and surface sulfidation by ion exchange in an aqueous Na 2 S solution. Increasing the treatment contact time (t c) from 8 to 48 h involves different…

RSC Advances, 2018, 8 (21), pp.11785 - 11798. ⟨10.1039/c8ra00176f⟩. ⟨hal-01748875⟩

• Article dans une revue

Room-Temperature Synthesis of Iron-Doped Anatase TiO2 for Lithium-Ion Batteries and Photocatalysis

Christian Andriamiadamanana, C. Laberty-Robert, Moulay Tahar Sougrati, Sandra Casale, Carine Davoisne, Snehangshu Patra, Frédéric Sauvage

Iron-doped nanocrystalline particles of anatase TiO2 have been successfully synthesized using a complete room-temperature synthetic approach, leading to particles of high surface area (280 m2/g) and a narrowed band gap of 2.3 eV. These particles were introduced for photocatalysis under white light…

Inorganic Chemistry, 2014, pp.10129-10139. ⟨10.1021/ic501067p⟩. ⟨hal-01094375⟩

• Article dans une revue

Mesocellular silica foam-based Ni catalysts for dry reforming of CH4 (by CO2)

Oscar Daoura, Marie-Nour Kaydouh, Nissrine El-Hassan, Pascale Massiani, Franck Launay, Maya Boutros

Nickel-containing mesocellular silica foam (MCF) catalysts were prepared for dry reforming of methane (DRM). Different methods were used for the synthesis of the MCFs supports in order to enhance their surface areas and pore volumes. The incorporation of nickel was done by three different methods:…

Journal of CO2 Utilization, 2018, 24, pp.112-119. ⟨10.1016/j.jcou.2017.12.010⟩. ⟨hal-02414803⟩

• Article dans une revue

Simple procedure for vacant POM-stabilized palladium (0) nanoparticles in water: structural and dispersive effects of lacunary polyoxometalates

R. Villanneau, A. Roucoux, P. Beaunier, D. Brouri, A. Proust

Metallic palladium nanoparticles have been generated by hydrogenation with H2 of solutions of several non organometallic PdII-derivatives of heteropolytungstates, at ambient temperature and atmospheric pressure. These nanoparticles have been characterized by various techniques: 31P NMR and Raman…

RSC Advances, 2014, 4 (50), pp.26491-26498. ⟨10.1039/C4RA03104K⟩. ⟨hal-01121577⟩

• Article dans une revue

N-Methylephedrium Salts as Chiral Surfactants for Asymmetric Hydrogenation in Neat Water with Rhodium(0) Nanocatalysts

Elodie Guyonnet Bile, Audrey Denicourt-Nowicki, Rita Sassine, Patricia Beaunier, Franck Launay, Alain Roucoux

Synthesis of a water-sol. family of optically active N-methylephedrium salts NMeEph12X I [X = Br, HCO3, (S)-lactate] that can be used as efficient protective agents of metallic nanoparticles in neat water was described. The resulting materials were evaluated in the asym. hydrogenation of…

ChemSusChem, 2010, 3 (11), pp.1276-1279. ⟨10.1002/cssc.201000206⟩. ⟨hal-00604720⟩

• Poster de conférence

Nanostructure Characterization of Carbide-derived Carbons by Morphological Analysis of Transmission Electron Microscopy Images Combined with Physisorption and Raman Spectroscopy

Martin Oschatz, Pascaline Pre, Patricia Beaunier, Stefan Kaskel, Nickel Wielfried

11th international Symposium on the characterization of porous solids COPS XI, May 2017, Avignon, France. ⟨hal-02881501⟩

• Article dans une revue

Observations of fast-moving features in the debris disk of AU Mic on a three-year timescale: Confirmation and new discoveries

A. Boccaletti, E. Sezestre, A.-M. Lagrange, P. Thebault, R. Gratton, M. Langlois, C. Thalmann, M. Janson, P. Delorme, J.-C. Augereau, G. Schneider, J. Milli, C. Grady, J. H Debes, Q. Kral, J. Olofsson, J. Carson, A. Maire, T. Henning, J. Wisniewski, J. Schlieder, C. Dominik, S. Desidera, C. Ginski, D. Hines, F. Menard, D. Mouillet, N. Pawellek, A. Vigan, Erwan M Lagadec, H. Avenhaus, J.-L. Beuzit, B. Biller, M. Bonavita, M. Bonnefoy, W. Brandner, F. Cantalloube, G. Chauvin, A. Cheetham, M. Cudel, C. Gry, S. Daemgen, M. Feldt, R. Galicher, J. Girard, J. Hagelberg, P. Janin-Potiron, M. Kasper, H. Le Coroller, D. Mesa, S. Peretti, C. Perrot, M. Samland, E. Sissa, F. Wildi, A. Zurlo, S. Rochat, E. Stadler, L. Gluck, A. Origné, M. Llored, P. Baudoz, G. Rousset, P. Martinez, F Rigal

Context. The nearby and young M star AU Mic is surrounded by a debris disk in which we previously identified a series of large-scale arch-like structures that have never been seen before in any other debris disk and that move outward at high velocities.Aims. We initiated a monitoring program with…

Astronomy & Astrophysics - A&A, 2018, 614, pp.A52. ⟨10.1051/0004-6361/201732462⟩. ⟨hal-02301370⟩

• Article dans une revue

High pressures pathway toward boron-based nanostructured solids

Remi Grosjean, Yann Le Godec, Simon Delacroix, Guillaume Gouget, Patricia Beaunier, Ovidiu Ersen, Dris Ihiawakrim, Oleksandr O Kurakevych, Corinne Chanéac, David Portehault

Inorganic nanocomposites made of an inorganic matrix containing nanoparticle inclusions provide materials of advanced mechanical, magnetic, electrical properties and multifunctionality. The range of compounds that can be implemented in nanocomposites is still narrow and new preparation methods are…

Dalton Transactions, 2018, 47 (23), pp.7634-7639. ⟨10.1039/C8DT00932E⟩. ⟨hal-01883827⟩