The 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 on multiwalled carbon nanotubes for supercritical carbon dioxide deposition technique. 3-(heptadecafluorooctyl)aniline-vic-dioxime and phenanthrenequinonedioxime were used as ligands in synthesis of the palladium and copper precursors. All synthesized ligands and complexes were characterized with elemental analysis, 1H and 19F NMR, FT-IR and magnetic susceptibility technique. Deposition of these precursors in supercritical carbon dioxide was performed at 363ºK in the pressure 0.69 MPa H2 and 27.6 MPa CO2. Surface morphology of metal deposited multiwalled carbon nanotubes has been investigated with X-ray diffraction, high-resolution transmission electron microscopy and scanning electron microscopy with EDX. TEM micrographs showed homogenous distributions of Cu and Pd nanoparticles on the multiwalled carbon 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 the preparation of supported metal nanoparticles in supercritical carbon dioxide.