Synthesis and Characterization of Novel Pd and Cu vic-dioxime Precursors for Their Supercritical Deposition on Multiwalled Carbon Nanotubes

Abstract

Novel precursors were developed for deposition of Cu and Pd nanoparticles onmultiwalled carbon nanotubes for supercritical carbon dioxide deposition technique. 3-(heptadecafluorooctyl)aniline-vic-dioxime and phenanthrenequinone dioxime were used asligands in synthesis of the palladium and copper precursors. All synthesized ligands andcomplexes were characterized with elemental analysis, 1H and 19F NMR, FT-IR and magneticsusceptibility technique. Deposition of these precursors in supercritical carbon dioxide wasperformed at 363 K in the pressure 0.69 MPa H2 and 27.6 MPa CO2. Surface morphology of metaldeposited multiwalled carbon nanotubes has been investigated with X-ray diffraction, highresolutiontransmission electron microscopy and scanning electron microscopy with EDX. TEMmicrographs showed homogenous distributions of Cu and Pd nanoparticles on the multiwalledcarbon nanotubes. The nature and crystallinity of the nanoparticles were confirmed using XRD.This study showed that these novel vic-dioxime complexes are suitable precursors for thepreparation of supported metal nanoparticles in supercritical carbon dioxide.