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Ag/Au-decorated Fe3O4/SiO2 composite nanospheres for catalytic applications / Ling Li in Acta materialia, Vol. 58 N° 11 (Juin 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 11 (Juin 2010) . - pp. 3825–3831 Titre : Ag/Au-decorated Fe3O4/SiO2 composite nanospheres for catalytic applications Type de document : texte imprimé Auteurs : Ling Li, Auteur ; Eugene S.G. Choo, Auteur ; Xiaosheng Tang, Auteur Année de publication : 2011 Article en page(s) : pp. 3825–3831 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Silica  Superparamagnetic  Composite  Nanoparticle  Catalytic Résumé : Noble metal particles in nanoscale (Au, Ag, Pt, etc.) have attracted intensive research interest due to their promising catalysis properties. However, the practical applications of these nanoparticle catalysts are always jeopardized by two problems. One is the difficulty in recovering the used nanoparticles and the other arises from the low catalytic efficiency due to the aggregation of the nanoparticles. In this work, Ag/Au nanoparticles were distributed onto spherical superparamagnetic carriers (SSCNs), which were fabricated through a facile oil-in-DEG emulsion route. The Ag/Au nanoparticles were attached onto the SSCNs by two steps. The Au seeds were attached onto the silica surface through electrostatic attraction first, and the Ag nanoparticles were grown on the basis of the Au seeds. The obtained Ag/Au–SSCN composite nanospheres demonstrated promising catalytic properties, which could also be recycled very easily by using a magnet. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410002107 [article] Ag/Au-decorated Fe3O4/SiO2 composite nanospheres for catalytic applications [texte imprimé] / Ling Li, Auteur ; Eugene S.G. Choo, Auteur ; Xiaosheng Tang, Auteur . - 2011 . - pp. 3825–3831. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 11 (Juin 2010) . - pp. 3825–3831 Mots-clés : Silica  Superparamagnetic  Composite  Nanoparticle  Catalytic Résumé : Noble metal particles in nanoscale (Au, Ag, Pt, etc.) have attracted intensive research interest due to their promising catalysis properties. However, the practical applications of these nanoparticle catalysts are always jeopardized by two problems. One is the difficulty in recovering the used nanoparticles and the other arises from the low catalytic efficiency due to the aggregation of the nanoparticles. In this work, Ag/Au nanoparticles were distributed onto spherical superparamagnetic carriers (SSCNs), which were fabricated through a facile oil-in-DEG emulsion route. The Ag/Au nanoparticles were attached onto the SSCNs by two steps. The Au seeds were attached onto the silica surface through electrostatic attraction first, and the Ag nanoparticles were grown on the basis of the Au seeds. The obtained Ag/Au–SSCN composite nanospheres demonstrated promising catalytic properties, which could also be recycled very easily by using a magnet. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410002107