• Article dans une revue

Hydroxyapatite: A Matrix for Metal Exsolution Leading to Highly Dispersed Catalytically Active Species

Josefine Schnee, Ferdaous Ben Romdhane, François Devred, Antoine Miche, Alixandre Magerat, Diane Reja, Eric Gaigneaux, Marco Daturi, Cyril Thomas, Guylène Costentin

Hydroxyapatite (Ca10(PO4)6(OH)2, or HAp) -the main mineral component of bones and teeth -is a material of great interest not only in biomedical applications but also in heterogeneous catalysis. Its framework Ca 2+ cations can be substituted by a wide variety of catalytically active metals (Cu 2+ ,…

Chemistry of Materials, 2024, 36 (3), pp.1188-1196. ⟨10.1021/acs.chemmater.3c01749⟩. ⟨hal-04747806⟩

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Antibacterial properties of glycosylated surfaces: variation of the glucosidal moiety and fatty acid conformation of grafted microbial glycolipids

Claire Valotteau, Sophie Roelants, Dasaiyan Prabhu, Susanne Zibek, Michael Günther, Wim Soetaert, Bernd Everaert, Claire-Marie Pradier, Florence Babonneau, Niki Baccile, Vincent Humblot

Glycosylated surfaces can display antimicrobial properties. It has been shown that sophorolipids can be used to develop biocidal coatings against Gram-positive and Gram-negative bacteria, but with a limited efficiency so far. Therefore, it appears necessary to further investigate the surface…

Molecular Systems Design & Engineering, 2020, 5 (7), pp.1307 - 1316. ⟨10.1039/D0ME00059K⟩. ⟨hal-03414300⟩

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PdAg nanoparticles and aminopolymer confined within mesoporous hollow carbon spheres as an efficient catalyst for hydrogenation of CO 2 to formate

Guoxiang Yang, Yasutaka Kuwahara, Shinya Masuda, Kohsuke Mori, Catherine Louis, Hiromi Yamashita

PdAg alloy nanoparticles and aminopolymer dispersed in hollow structured carbon catalysts exhibit high activity and stability for CO 2 hydrogenation.

Journal of Materials Chemistry A, 2020, 8 (8), pp.4437-4446. ⟨10.1039/c9ta13389e⟩. ⟨hal-03995337⟩

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Naked Eye Immunosensing of Food Biotoxins Using Gold Nanoparticle-Antibody Bioconjugates

Lu Zhang, Michèle Salmain, Bo Liedberg, Souhir Boujday

Colorimetric immunoassays using gold nanoparticles (AuNP) form a special class of assays where AuNP act as a transducer to monitor binding events between an antigen and an antibody. Indeed, AuNP display unique optical properties that can been exploited in various ways to develop biosensors. One of…

ACS Applied Nano Materials, 2019, 2 (7), pp.4150-4158. ⟨10.1021/acsanm.9b00598⟩. ⟨hal-02284503⟩

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Preparation of niobium-based oxygen carriers by polyol-mediated process and application to chemical-looping reforming

Pedro Henrique Lopes Nunes Abreu dos Santos, Sophie Nowak, Stéphanie Lau-Truong, Juliette Blanchard, Patricia Beaunier, José Augusto Jorge Rodrigues, Roberta Brayner

New niobium-based oxygen carriers were prepared adopting polyol-mediated process. Four different polyols were used (diethylene glycol, triethylene glycol, tetraethylene glycol, and 1,2-propanediol) and four different quantities of water (0 mL, 1 mL, 10 mL, 30 mL, with a total volume of 80 mL of…

Journal of Nanoparticle Research, 2019, 21 (5), ⟨10.1007/s11051-019-4528-z⟩. ⟨hal-02375304⟩

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Giant Exchange-Bias in Polyol-Made CoFe2O4-CoO Core-Shell Like Nanoparticles

Nancy Flores-Martinez, Giulia Franceschin, Thomas Gaudisson, Patricia Beaunier, Nader Yaacoub, Jean-Marc Greneche, Raul Valenzuela, Souad Ammar

Cobalt ferrite ferrimagnetic nanoparticles (NPs) are prepared and used in this work as seeds to grow a thin antiferromagnetic poly- and nanocrystalline CoO shell. The major purpose is to study systematically the characteristics of the as-produced powders, making emphasis on their internal…

Particle & Particle Systems Characterization, 2018, 35 (11), pp.1800290. ⟨10.1002/ppsc.201800290⟩. ⟨hal-02114586⟩

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Operando X‐ray Absorption Study of TiO₂‐supported Au, Cu, and Au–Cu Catalysts for Butadiene Selective Hydrogenation

Abdallah Nassereddine, Laurent Delannoy, Xavier Carrier, Catherine Louis, Camille La Fontaine, Anthony Beauvois, Jaysen Nelayah, Axel Wilson

The selective hydrogenation of unsaturated hydrocarbons is essential for the production of alkenes used in polymerization processes. Au‐based catalysts offer greater selectivity than Pd but are limited by poor hydrogen activation. Alloying Au with Cu offers a promising approach to enhance catalytic…

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One Step up the Ladder of Prebiotic Complexity: Formation of Nonrandom Linear Polypeptides from Binary Systems of Amino Acids on Silica

Yuriy Sakhno, Alice Battistella, Alberto Mezzetti, Maguy Jaber, Thomas Georgelin, Laurent Michot, Jean-François Lambert

Evidence for the formation of linear oligopeptides with nonrandom sequences from mixtures of amino acids coadsorbed on silica and submitted to a simple thermal activation is presented. The amino acid couples (glutamic acid+leucine) and (aspartic acid+valine) were deposited on a fumed silica and…

Chemistry - A European Journal, 2019, 25 (5), pp.1275-1285. ⟨10.1002/chem.201803845⟩. ⟨hal-02067461⟩

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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⟩

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The controlled synthesis of metal-acid bifunctional catalysts: Selective Pt deposition and nanoparticle synthesis on amorphous aluminosilicates

Jadid E. Samad, Juliette Blanchard, Celine Sayag, Catherine Louis, John R. Regalbuto

The rational synthesis of metal-acid bifunctional catalysts based on aluminosilicates will involve control over which domain – alumina or silica – the metal can be deposited on, as well as the control of particle size. These factors determine the ratio and proximity of the metal and acid sites. The…

Journal of Catalysis, 2016, 342, pp.213 - 225. ⟨10.1016/j.jcat.2016.08.002⟩. ⟨hal-01564217⟩