Morphology and Elemental Composition of Chemical Synthesized Intermetallic (Co-Sn, Ni-Sn, Co-Ni) Nanoparticles and Their Carbon Nanocomposites
Nanopowders of Co-Sn (Co:Sn=35:65), Ni-Sn (Ni:Sn=45:55) and Co-Ni particles (Co:Ni=50:50 and 80:20) are synthesized through a borohydride reduction in a mixture of aqueous solutions of the corresponding metal salts. Carbon nanocomposites are also obtained in situ by the same method applying template synthesis with a graphite (CF) support. The nanoparticles are aggregated due to their unsa-turated surface and the existed Wan deer Waals interaction forces in the case of Co-Sn and Ni-Sn nanoparticles and magnetic forces of attraction in the case of Co-Ni nanoparticles. The obtained samples are studied by scanning electron micro-scopy (SEM) and energy dispersitive spectro-scopy (EDS) to determine respectively the morphology and the distribution of the elements on the surface and in the volume of the obtained nanopowders (maps for a distribution of each element are taken). Both the graphite support used and the ratio between the metallic compo-nents set up in the initial reaction solutions influence on the nanoparticle’s formation and nanoparticle’s morphology, as well as they impact on the elemental composion of the samples investigated.
Index Terms- borohydride reduction, intermetallic nanoparticles, template synthesis, nanocomposites, SEM, EDS, mapping of element