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Nanoparticules métalliques déposées sur des matériaux poreux multifonctionnels pour des applications catalytiques

Abstract : The objective of the Ph.D. thesis is the development of new catalytic systems based on non-noble metal nanoparticles (Cu and/or Co MNPs) hosted in functional mesostructured hosts. To this aim, various supports are prepared by doping SBA-15 with Al, Ga and Fe heteroatoms using the two-step pH-adjustment method or by coating the SBA-15 surface with Al, Ga and Fe oxides using the melt infiltration approach. Likewise, hybrid organic-silica SBA-15 supports are obtained by partial extraction of the Pluronic P123 surfactant. The characterization and catalytic results show that the functionalization of SBA-15 supports with heteroatoms or with polyether groups originating from the native surfactant represents new strategic lines to achieve an enhanced control on the local environments of hosted MNPs and to engineer both the metal-support interaction and nanoparticle size, ultimately to fine tuning the performances of Cu and/or Co-based nanocatalysts in terms of activity and chemoselectivity for the liquid-phase hydrogenation of unsaturated aldehydes, such as cinnamaldehyde. Furthermore, SBA-15 materials containing Fe species in isolated and/or highly dispersed states are evaluated for the Fenton-type peroxidation of Reactive Red 120 azo dye, exhibiting excellent catalytic properties for the dye degradation.
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Submitted on : Thursday, February 6, 2020 - 2:59:11 PM
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  • HAL Id : tel-02469322, version 1



Irina Mazilu. Nanoparticules métalliques déposées sur des matériaux poreux multifonctionnels pour des applications catalytiques. Catalyse. Université de Poitiers; Universitatea tehnică "Gheorghe Asachi" (Iaşi, Roumanie), 2017. Français. ⟨NNT : 2017POIT2268⟩. ⟨tel-02469322⟩



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