Study on the Formation of Ferromagnetic Bimetallic Nanoparticles and Their Application in Trace Metal Ion Collection
In this study, we investigated the collection of trace metal ions using ferromagnetic bimetallic nanoparticles synthesized from ferromagnetic metals and noble metals using NaBH4 reduction. Co-Pd and -Pt and Fe-Pd and -Pt particles rapidly formed aggregates and had large ferromagnetic properties. The ion collection efficacy was evaluated for 40 elements chosen from the noble and rare earth metals. Elements that had recovery rates greater than 90% were Tl, Os, Cd, Sn, Ir, Pb, Ag, Au, Pt, Rh, Se, Ga, Te, Cu, and Ge. On the other hand, alkali, alkaline earth elements and most of the rare-earth elements were not recovered by this method.