Synthesis, characterization and nanocatalysis application of core-shell superparamagnetic nanoparticles of Fe3O4@Pd

ARIEL L. CAPPELLETTI; PAULA M. UBERMAN; SANDRA E. MARTÍN; MARTÍN E. SALETA; HORACIO E. TROIANI; RODOLFO D. SÁNCHEZ; RAÚL E. CARBONIO ; MIRIAM C. STRUMIA

AUSTRALIAN JOURNAL OF CHEMISTRY

CSIRO PUBLISHING

Lugar: Collingwood; Año: 2015

0004-9425

bstract: There is a wide number of different synthetic methods to obtain magnetite (Fe3O4) superparamagnetic nanoparticles (SPNPs). However, only a few are able to produce very small and well defined SPNPs with narrow size distribution. Herein we report a modification of the metal-complex decomposition in organic media method in which we replace iron (III) acetylacetonate (Fe(Acac)3) with an iron-urea-complex (Fe-Urea) as metal source for the synthesis. We were able to obtain with this modification small particle sizes with a good control in size distribution. Besides, the Fe-Urea complex is easy to prepare with excelent yields. Then, the core-shell nanoparticles are prepared using palladium (II) acetylacetonate as Pd source, obtainning a (Pd0) shell stabilized by oleylamine. The core-shell superparamagnetic nanoparticles of Fe3O4@Pd-OA are extensively characterized by FT-IR, PXRD, TEM, UV-vis,TGA/DSC and magnetic susceptibility measurements, and tested in a palladium-catalyzed