کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
68393 | 48513 | 2007 | 6 صفحه PDF | دانلود رایگان |
This work describes the preparation of Pd nanoparticles in multilayer polyelectrolyte films fabricated on a magnetic ferrite core by a layer-by-layer (LbL) self-assembly technique, and the relationship between catalytic activity and these hybrid core-shell nanocomposite structures in the hydrogenation of olefinic alcohols. The hydrogenation reaction seems to be only catalyzed by Pd nanoparticles in the outermost layer of the hybrid composites, probably due to the restricted diffusion of olefinic alcohols into ionically cross-linked multilayer films. The nano-size Pd catalysts attached to the core magnetic nanoparticles (MNP, CoFe2O4; average size = 20 nm) could be easily and efficiently isolated from the final product solution by magnetic decantation (applying external magnetic field), and be reused for 10 consecutive reactions without showing any significant activity degradation.
Pd nanoparticles were generated within multilayer polyelectrolyte films fabricated on a magnetic ferrite core by a layer-by-layer (LbL) self-assembly technique, and these hybrid core-shell composites showed the catalytic activity in the hydrogenation of olefinic alcohols with excellent recyclability. Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 263, Issues 1–2, 14 February 2007, Pages 163–168