Lucas LUCCHIARI RIBEIRO VONO - Soutenance en cours de traitement


Adresse Professionnelle
Av Professor Lineu Prestes, 748 05508-9
BRESIL
lucasvono@gmail.com
lucasvono@gmail.com

Doctorat Chimie Organométallique et de Coordination


Thèse soutenue le 18 mars 2016 - Université de Toulouse

Ecole doctorale : SDM - SCIENCES DE LA MATIERE - Toulouse

Sujet : Elaboration de catalyseurs supportés par dépôt de nanoparticules métalliques sur des composites magnétiques contenant de la silice, de l'oxyde de cérium et de l'oxyde de titane

Mots-clés de la thèse : catalyse,support magnétique,nanoparticules,hydrogénation,

Direction de thèse : Karine PHILIPPOT

Co-encadrement de thèse : Liane ROSSI

Cotutelle Institute of Chemistry of University of São Paulo. BRESIL
Descriptif : The PhD project entitled “Development of nanocomposites as supports for nanostructured metal catalysts” concerns the preparation of catalyst supports comprised of magnetic nanoparticles coated by silica or other oxides (ceria, titania), and the immobilization of metal nanoparticles on these supports for application in catalysis. The main goal is the preparation of magnetically recoverable nanocatalysts [1]. The synthesis and the characterization of morphology and thermal behavior of the magnetic particles coated with silica (Fe3O4@SiO2) as supports, and the preparation/characterization of titania and ceria nanoparticles deposited on the surface of these supports will be realized in São Paulo. As the first nanocatalysts’ synthesis approach, the deposition of metal nanoparticles (Pd and Rh) by metal salts impregnation – reduction on the so-obtained Fe3O4@SiO2 (with or without ceria/titania) will be carried out in São Paulo [2]. To improve the anchorage of the metal nanoparticles on the support, functionalization of the supports is envisaged with amine groups using 3- aminopropyltriethoxysilane. For comparison purposes, the deposition of preformed mono- and bimetallic nanoparticles (Pd, Rh and bimetallic compositions) from colloidal solutions obtained by decomposition of organometallic complexes, on Fe3O4@SiO2 (with or without ceria/titania) previously prepared in Brazil as supports will be performed at the Laboratory of Coordination Chemistry of CNRS in Toulouse, following the method developed in the “Nanostructures and Organometallic” team [3]. This second synthesis approach should allow the preparation of nanocatalysts with higher control of nanoparticle size than by the impregnation/reduction method. However, by this way, the support effect could be evaluated in more detail, since the use of pre-formed nanoparticles will allow the comparison of different supports with removal of the particle size effect. So, any difference observed on the catalytic activity will give information on the support effect. To complete the study of the support effect on the preparation of metal nanoparticles, the “in-situ” synthesis of metal nanoparticles by direct decomposition of organometallic precursors on the supports is also planned. Finally, the catalytic performances of the obtained nanocatalysts will be evaluated in hydrogenation reactions (cyclohexne, benzene…), both in São Paulo and Toulouse.

Unité de recherche : LCC - Laboratoire de Chimie de Coordination UPR 8241 - Toulouse

Diplôme étranger - Studies on the immobilization of photosensitizers in magnetic nanomaterials

obtenu en novembre 2010 - Instituto de Química da Universidade de São Paulo
Option : Inorganic chemistry

Production scientifique

- GONÇALVES, RENATO VITALINO ; WOJCIESZAK, ROBERT ; WENDER, HEBERTON ; SATO B. DIAS, CARLOS ; Vono, Lucas L.R. ; EBERHARDT, DARIO ; TEIXEIRA, SERGIO RIBEIRO ; ROSSI, LIANE MARCIA 2015. Easy Access to Metallic Copper Nanoparticles with High Activity and Stability for CO Oxidation   ACS Applied Materials & Interfaces, 7 (15), pp 7987–7994,
- ROSSI, L. M. ; Vono, L. L. R. ; GARCIA, MARCO A. S. ; FARIA, THIAGO L. T. ; LOPEZ-SANCHEZ, JOSE A. 2013. Screening of Soluble Rhodium Nanoparticles as Precursor for Highly Active Hydrogenation Catalysts: The Effect of the Stabilizing Agents   Topics in Catalysis, 56, p. 1228-1238,
- Guerrero, M.; Costa, N.J.S.; Vono, L.L.R.; Rossi, L.M.; Gusevskaya, E.V.; Philippot, K. 2013. Taking advantage of a terpyridine ligand for the deposition of Pd nanoparticles onto a magnetic material for selective hydrogenation reactions   Journal of Materials Chemistry A, v1 ,p 1441,
- Pélisson, Carl-Hugo ; Vono, Lucas L.R. ; Hubert, Claudie ; Denicourt-Nowicki, Audrey ; Rossi, Liane M. ; Roucoux, Alain 2012. Moving from surfactant-stabilized aqueous rhodium (0) colloidal suspension to heterogeneous magnetite-supported rhodium nanocatalysts: Synthesis, characterization and catalytic performance in hydrogenation reactions   Catalysis Today, v. 183, p. 124-129,
- Rossi, Liane M. ; GARCIA, MARCO A. S. ; Vono, Lucas L. R. 2012. Recent advances in the development of magnetically recoverable metal nanoparticle catalysts   ournal of the Brazilian Chemical Society , v. 23, p. 1959-1971,

Langues Vivantes : Anglais C2 - Courant - Français A2 - Élémentaire - Portugais C2 - Maternel
Dernière mise à jour le 29 janvier 2016