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Article Dans Une Revue L'Actualité Chimique Année : 2009

Synthesis of supported metallic nanoparticles and their use in air depollution

Des nanoparticules métalliques supportées pour la dépollution de l’air

Résumé

The main objectives of the "NACACOMO" Consortium ("Nanomaterials: Catalysts for the Conversion of organic Molecules. Uses in fine chemicals and environment protection") consisted in generating novel catalysts composed of nanoparticles of metals (Pt, Pd, Ag...) and/or oxides (TiO2...) stabilized and well distributed over the surface of a support (foams, ceramics), by monitoring both the particle size and the "coating" process itself, using new technologies: CVD, plasma-spray, laser pyrolysis, supercritical preparation, which were compared to conventional soft chemistry recipes. The most accurate characterization of particle morphology, local structure, texture, spatial arrangement but also of their reactivity, were achieved by privileging the utilization of various in situ methods. Details on formation mechanisms of a solid nanoparticle at the atomic level (nucleation, growth and particle (re)distribution over the support...) could be obtained in selected cases, with opportunities for scaling up and shaping. The (chemical) nature of the so-obtained nanomaterials was monitored for selected catalytic applications involving the development of environmental friendly processes, such as oxidation of VOC, with a priority for aromatics and chlorinated compounds.
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Dates et versions

hal-00404859 , version 1 (17-07-2009)

Identifiants

  • HAL Id : hal-00404859 , version 1

Citer

J. Barrault, S. Valange, J.M. Tatibouet, S. Thollon, Nathalie Herlin-Boime, et al.. Des nanoparticules métalliques supportées pour la dépollution de l’air. L'Actualité Chimique, 2009, 331, pp.20-29. ⟨hal-00404859⟩
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