Titre :

Synthesis of novel catalytic composite nanofibers containing ruthenium nanoparticles stabilized by a citric acid-β-cyclodextrin polymer

Auteur(s) :

Fadlallah, Sami [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Tabary, Nicolas [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité Matériaux et Transformations (UMET) - UMR 8207
Noel, Sebastien [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
UCCS Équipe Catalyse Supramoléculaire
Leger, Bastien [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
UCCS Équipe Catalyse Supramoléculaire
Cazaux, Frederic [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Monflier, Eric [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
UCCS Équipe Catalyse Supramoléculaire
Martel, Bernard [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité Matériaux et Transformations (UMET) - UMR 8207

Titre de la revue :

Nanoscale Advances

Nom court de la revue :

Nanoscale Adv.

Numéro :

2

Pagination :

2087-2098

Éditeur :

Royal Society of Chemistry (RSC)

Date de publication :

2020

ISSN :

2516-0230

Discipline(s) HAL :

Chimie/Matériaux
Sciences de l'ingénieur [physics]/Matériaux
Chimie/Polymères

Résumé en anglais : [en]

The elaboration of catalytic composite nanofibers (NFs) by electrospinning through a one-pot strategy is described. First, aqueous colloidal suspensions of ruthenium nanoparticles (Ru NPs) formed by reduction of a Ru(III) ...
Lire la suite >The elaboration of catalytic composite nanofibers (NFs) by electrospinning through a one-pot strategy is described. First, aqueous colloidal suspensions of ruthenium nanoparticles (Ru NPs) formed by reduction of a Ru(III) salt with NaBH4 and stabilized by poly(cyclodextrin citrate) (PCD) were prepared. Then, poly(vinyl alcohol) (PVA) of different molecular weights was dissolved in the colloidal suspensions that were electrospun. SEM analyses of the resulting nanowebs displayed uniform NFs, whose diameters ranged between 300 and 700 nm and enlarged upon increasing (i) PVA molecular weight, (ii) nanosuspension viscosity, (iii) the amount of NaBH4 and (iv) the PCD/Ru NP concentration. TEM analysis confirmed that Ru NPs with a mean diameter of around 2 nm were observed at the surface of NFs, embedded in the PVA matrix of NFs. HAADF-STEM and EDS mapping clearly showed that Ru NPs were homogeneously distributed onto and into the matrix of NFs. After their electrospinning, the prepared nanowebs were submitted to a heat post-treatment at 160 °C which was shown to trigger the PVA crystallization. In addition, the physical crosslinking of PVA chains by NaBO2 resulting from NaBH4 oxidation in the precursor suspension was also observed. Interestingly, an SEM study evidenced that the thermal post-treatment in combination with the presence of NaBO2 clearly improved the thermal stability of the synthesized composite nanowebs. Finally, catalytic hydrogenation tests showed the absence of Ru NPs leaching from NFs in the reaction medium, and displayed good conversion of styrene into ethylbenzene.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères
Catalyse et chimie supramoléculaire (CASU)

Date de dépôt :

2020-05-26T11:25:34Z
2020-08-27T14:12:08Z