Actualités

  • Liquid phase cyclohexene oxidation over vanadia based catalysts with tert-butyl hydroperoxide: Epoxidation versus allylic oxidation

    by Sanaa El-Korso, Ilyes Khaldi, Sumeya Bedrane, Abderrahim Choukchou-Braham,Frédéric Thibault-Starzyk, Redouane Bachir DOI: 10.1016/j.molcata.2014.07.002 Journal of Molecular Catalysis A: Chemical Highlights •We have epoxidation in the presence of redox and monomeric vanadium sites. •Allylic oxidation was obtained with acidic and/or polymeric vanadium sites. •This reaction is heterogeneous and vanadium leaching is not observed. •The results […]

    15 July 2014
  • Aujourd’hui, pique-nique du laboratoire!

    11 July 2014
  • The influence of CO2 and H2O on the storage properties of Pt-Ba/Al2O3 LNT catalyst studied by FT-IR spectroscopy and transient microreactor experiments

    by S. Morandi, F. Prinetto, G. Ghiotti, L. Castoldi, L. Lietti, P. Forzatti, M. Daturi, V. Blasin-Aubé Catalysis Today, Volume 231, 1 August 2014, Pages 116–124 DOI: 10.1016/j.cattod.2013.12.036 Highlights • The effect of CO2 and H2O on the NOx storage on PtBa/Al2O3 is investigated. • NOx are stored on PtBa catalysts as nitrites and nitrates. […]

    5 July 2014
  • Synthesis of Zeolite Nanoparticles for Environmental Applications

    phD defense of  Hussein AWALA Friday, June 27th 10:30 (Salle des thèses en Sciences 3) Zeolite nanoparticles with diverse pore architectures, high external surface area, micro/mesoporosity, define particle size and morphology open the door for advanced applications. In addition to catalysis, separation and ion exchange processes, nanosized zeolites assembled in films and three-dimensional constructs are used […]

    23 June 2014
  • Effect of zeolite nanoparticles on the optical properties of diacetone acrylamide-based photopolymer

    by D. Cody, E. Mihaylova, L. O’Neill, T. Babeva, H. Awala, R. Retoux, S. Mintova, I. Naydenova DOI: 10.1016/j.optmat.2014.05.021 Highlights • A new photopolymer nano composite based on a low toxicity monomer and BEA type zeolite nano particles is developed. • Significant improvement of the refractive index modulation in holographic recording. • Nanoparticles’ pores remain […]

    19 June 2014
  • Microwave synthesis of colloidal stable AlPO-5 nanocrystals with high water adsorption capacity and unique morphology

    by Eng-Poh Ng,Darren Tat-Lun Ng, Hussein Awala, Ka-Lun Wong, Svetlana Mintova DOI: 10.1016/j.matlet.2014.06.022 Highlights •Microwave synthesis of AlPO-5 nanocrystals is reported. •Nanosized AlPO-5 is synthesized using a new imidazolium template. •Microwave heating shortens the crystallization time. •AlPO-5 nanocrystals possess unique morphology and are sized ca. 300 nm. •The nanocrystals are colloid stable and exhibit hydrophilic […]

    19 June 2014
  • Crystal growth kinetics as a tool for controlling the catalytic performance of a FAU-type basic catalyst – ACS Catalysis

    By Satoshi Inagaki, Karine Thomas, Valerie Ruaux, Guillaume Clet, Toru Wakihara, Shoma Shinoda, Sae Okamura, Yoshihiro Kubota and Valentin Valtchev DOI: 10.1021/cs500153e Abstract This study reports on the catalytic performance of nanosized zeolite X crystals and their precursors in the reaction of benzaldehyde with ethyl cyanoacetate. Crystal growth kinetics of FAU-type zeolite is studied at […]

    7 June 2014
  • Understanding the storage function of a commercial NOx-storage-reduction material using operando IR under realistic conditions

    By Juliette Dupré, Philippe Bazin, Olivier Marie, Marco Daturi, Xavier Jeandel and Frédéric Meunier DOI: 10.1016/j.apcatb.2014.05.027 Highlights A commercial NOx-Storage-Reduction (NSR) material was investigated by operando FT-IR Ionic carbonates at the outer layers of Ba particles were replaced with ionic-like nitrates Covalent species (at surface sites of alumina and ceria) were unimportant for the storage. […]

    31 May 2014
  • 3rd Workshop on Zeolites

    The LCS team thanks all participants attending the 3rd Workshop on Zeolites

    22 May 2014
  • Dramatic promotion of copper-alumina catalysts by sodium for acetone trimerisation

    Emanuelle LIGNER, Frederic Meunier, arnaud travert, Sylvie Maury and Nicolas Cadran Catal. Sci. Technol., 2014, Accepted Manuscript DOI: 10.1039/C4CY00440J Na-promoted Cu-Al materials are efficient multifunctional catalysts for the direct conversion of gas phase acetone to diisobutyl ketone (DIBK) with unprecedented yields (up to 31 %). The Na content is a major parameter determining the stability […]

    20 May 2014
  • Photochemical preparation of silver nanoparticles supported on zeolite crystals

    By Moussa Zaarour, Mohamad El-Roz, Biao Dong, Richard Retoux, Roy Aad, Julien Cardin, Christian Dufour, Fabrice Gourbilleau, Jean-Pierre Gilson and Svetlana Mintova DOI: 10.1021/la5006743 Abstract A facile and rapid photochemical method to prepare supported silver nanoparticles (Ag-NPs) in a suspension of faujasite-type (FAU) zeolite nanocrystals is described. Silver cations are introduced by ion exchange in […]

    11 May 2014
  • Effect of the ligand functionalization on the acid-base properties of flexible MOFs

    By Béatrice Moulin, Fabrice Salles, Sandrine Bourrelly, Philip L. Llewellyn, Thomas Devic, Patricia Horcajada, Christian Serre, Guillaume Clet, Jean-Claude Lavalley, Marco Daturi, Guillaume Maurin and Alexandre Vimont DOI: 10.1016/j.micromeso.2014.04.025 Highlights IR and modelling approaches for specify the dual interaction of propyne in MIL-53. Halogen atom acts as basic site toward propyne in functionalized MOFs. Free […]

    26 April 2014
  • Photoreduction of Ag+ by Diethylaniline in colloidal zeolite nanocrystals

    by Florence Luchez, Zakaria Tahri, Vincent De Waele, Ivan Yordanov, Svetlana Mintova, Alain Moissette, Mehran Mostafavi, Olivier Poizat http://dx.doi.org/10.1016/j.micromeso.2014.04.008 Highlights • Extra-framework Ag+ in colloidal zeolite Beta nanocrystals was photoreduced by amine. • Subsequent early nucleation of silver atoms was followed by transient absorption. • Ag0 is formed in less than 100 ns and is stable for […]

    19 April 2014
  • Rediscovering zeolite mechanochemistry – a pathway beyond current synthesis and modification boundaries

    by Gerardo Majano, Lars Borchardt, Sharon Mitchell, Valentin Valtchev, Javier Pérez-Ramírez http://dx.doi.org/10.1016/j.micromeso.2014.04.006 Highlights • Mechanochemical treatment versatile tool for zeolite synthesis and modification. • Scalable, efficient, and mechanistically-distinct to solvent-intensive routes. • Structural transformations classified according to the energy required. • Catalytic properties enhanced by mechanochemical activation. • Rationalization will facilitate the scale up of […]

    19 April 2014
  • New paper: Synthesis of AlPO-5 with Diol-substituted Imidazolium-based Organic Template

    by Damien Yiyuan Khoo, Hussein Awala, Svetlana Mintova, Eng-Poh Ng Highlights •AlPO-5 molecular sieve is synthesized using new diol-substituted imidazolium template. •Effects of synthesis conditions on AlPO-5 crystallization are investigated. •AlPO-5 crystals with different morphologies and sizes are synthesized. •An efficient technique for template removal is presented.   Abstract AlPO-5 crystals are prepared using 3-(2,3-dihydroxypropyl)-1,2-dimethylimidazolium […]

    18 April 2014
  • 5th International Conference on Operando Spectroscopy May 17, 2015 – May 21, 2015

    Deauville, Amirauté Hotel May 17, 2015 – May 21, 2015 Operando V takes place 12 years after the first edition in Lunteren (2003 – Netherland) and the following conferences in Toledo (2006 – Spain), Warnemünde (2009 – Germany) and Brookhaven (2012 – USA). We invite you to attend and contribute to the Fifth International Conference […]

    17 April 2014
  • Zeolite films as building blocks for antireflective coatings and vapor responsive Bragg stacks

      by Tsvetanka Babeva, Hussein Awala, Marina Vasileva, Jaâfar El Fallah, Katerina Lazarova, Sebastien Thomas and svetlana mintova Dalton Trans., 2014, Accepted Manuscript, DOI: 10.1039/C4DT00711E Received 10 Mar 2014, Accepted 10 Apr 2014 Zeolite films (LTL, BEA and MFI) are prepared with a thickness in the range 50-170 nm through multistep spin-on deposition method. The […]

    14 April 2014
  • LCS is a member of Labex EMC3

    The EMC3 projet named « Energy Materials and Clean Combustion Center » is a « Laboratoire d’Excellence » (Excellence research center) The research centre is dedicated to Materials for Energy and Clean Combustion. Supported by the CNRS, it joins 7 Norman laboratories: 4 laboratories in Caen (CIMAP, CRISMAT, LCMT and LCS), 2 laboratories in Rouen […]

    9 April 2014
  • Participations of the LCS to TOCAT7 June 1-6, Kyoto 2014

    Increase The HDS Activity by Changing The Ratio M over S Edges ‐ Effect of Chelating Agent and High Pressure Sulfidation, Francoise Mauge, Jian Jun Chen, Laetitia Oliviero, Perla Castillo, Laboratoire Catalyse et Spectrochimie, Ensicaen, UCBN, CNRS, Universidad Nacional Autónoma   NOx Storage and Reduction on Rare Earths‐Based Mixed Oxides, Marco Daturi, Emeline Dassonneville, Vanessa […]

    7 April 2014
  • Farah KAWTHARANI a soutenu sa thèse le vendredi 28 mars 2014 à 13h30 à Lille

    Farah KAWTHARANI a soutenu sa thèse le vendredi 28 mars 2014 à 13h30, Amphi du CERLA à Lille Titre de la thèse : Préparation de nanoparticules d’argent stabilisées dans des nanocristaux de zéolithe BETA : caractérisation de la photodynamique plasmonique ultra-rapide et de la réactivité vis-à-vis du monoxyde de carbone. Discipline : Optique et Lasers, […]

    7 April 2014
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