STUDY OF CARBON-BASED NANOCOMPOSITES WITH INTERMETALLIC (Co-Sn, Ni-Sn) NANOPARTICLES

Intermetallic (Co-Sn, Ni-Sn) nanoparticles are synthesized through a borohydride reduction with NaBH4 in a mixture of aqueous solutions of CoCl2 center dot 6H(2)O, NiCl2 center dot 6H(2)O, and SnCl2 center dot 2H(2)O at different mass ratios Co:Sn and Ni:Sn. Subsequently, carbon - based nanocomposites are obtained. A template technique which involves borohydride reduction of intermetallic nanoparticles on a support (carbon foam, carbon powder, graphite) is used. Samples are studied by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) analysis. The influence of the different supports used on the morphology, structure, phase composition and element composition of the synthesized composite materials is investigated. Phases, CoSn2 (Co:Sn = 1:2), Co3Sn2 (Co:Sn = 3:2), Ni3Sn2 (Ni:Sn = 3:2), Ni3Sn (Ni: Sn = 3:1) are achieved. They are in correspondence with the phase diagrams of the Co-Sn and Ni-Sn binary systems.