Actualités

  • In situ and post-synthesis control of physicochemical properties of FER-type crystals

    in Microporous and Mesoporous Materials by Xiaoxin Chen, Totka Todorova, Alexandre Vimont, Valérie Ruaux, Zhengxing Qin, Jean-Pierre Gilson, Valentin Valtchev DOI: 10.1016/j.micromeso.2014.07.057 Highlights • FER-type zeolites were synthesized in three different initial systems. • Seeds were used to decrease zeolite crystals size. • Secondary pores in zeolite crystals were formed by etching with HF-NH4F solutions. • Crystal morphology of obtained materials was studied. […]

    23 August 2014
  • Metalloaded zeolite films with bi-modal porosity for selective detection of carbon monoxide

    by Louwanda Lakiss, Sébastien Thomas, Philippe Bazin, Vincent de Waele, Svetlana Mintova in Microporous and Mesoporous Materials DOI: 10.1016/j.micromeso.2014.08.001 Highlights • Preparation of metal containing (Pt, Pd) zeolite Beta nanocrystals. • Assembly of metal containing zeolite crystals in thin films. • Optical properties of metal containing zeolite films. • Detection of carbon monoxide, methanol and a mixture of both […]

    12 August 2014
  • Silver confined within zeolite EMT nanoparticles: preparation and antibacterial properties

    by Biao Dong, Sama Belkhair, Dr. Zaarour, Leanne Fisher, Joanna Verran, Lubomira Tosheva, Richard Retoux, Jean-Pierre Gilson and svetlana mintova Nanoscale, 2014, Accepted Manuscript DOI: 10.1039/C4NR03169E Abstract: The preparation of pure zeolite nanocrystals (EMT-type framework) and their silver ion-exchanged (Ag+-EMT) and reduced silver (Ag0-EMT) forms is reported. The template-free zeolite nanocrystals are stabilized in water […]

    30 July 2014
  • Nanoparticles-induced inflammatory cytokines in human plasma concentration manner: an ignored factor at the nanobio-interface

    by Nicolin Tirtaatmadja, Gysell Mortimer, Eng-Poh Ng, Hacan Ali Ahmad, Svetlana Mintova, Vahid Serpooshan, Rodney F. Minchin, Morteza Mahmoudi Journal : Journal of the Iranian Chemical Society DOI : 10.1007/s13738-014-0486-7 Abstract : Properties of nanoparticles (NPs) are responsible for their interaction with various biomolecules such as proteins in biological environments. Amount and composition of the […]

    26 July 2014
  • Silicate ionic liquid synthesis of zeolite merlinoite: Crystal size control from crystalline nanoaggregates to micron-sized single-crystals

    Mohamed Haouas, Louwanda Lakiss, Charlotte Martineau, Jaafar El Fallah, Valentin Valtchev, Francis Taulelle Microporous and Mesoporous Materials DOI: 10.1016/j.micromeso.2014.07.011 Highlights •Hydrated silicate ionic liquid is obtained by a two-steps procedure from TEOS. •Coacervation was observed in highly alkaline solution. •Phase separation by decantation allows extraction of silicate phase. •Synthesis of purely mineral merlinoite was achieved […]

    22 July 2014
  • 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
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