Synthesis and characterization of Fe-Sn nanoparticles via the galvanic replacement method

摘要

Tin-iron (Sn-Fe) nanoparticles were synthesized using iron nanoparticles as the template under the hydrothermal environment. Surface morphology of the obtained nanoparticles revealed a spherical crystal habit, with decreasing size as the reaction temperature and time increased. X-ray diffraction of the nanoparticles produced at 80°C and 14-hour reaction time revealed a more crystalline phase with an average diameter of 178 nm. The cyclic voltammetry plot given in these reaction parameters showed a variation in the oxidation peak, with the occurrence of the second peak at around -0.2 V associated with the oxidation of tin into tin oxide. The majority of the component is tin, as revealed by the elemental analyses, and the formation of the Fe-Sn intermetallic alloy nanoparticles can be attributed to the galvanic replacement of tin as it diffuses into the surface of the iron nanoparticle template.