The Effect of Starch Coating on Stabilization of Bimetallic Fe/Ni Banoparticles

A Comparative study of starch stabilized Fe/Ni nanoparticles and non-stabilized Fe/Ni nanoparticles was performed. The Fe/Ni nanoparticles were synthesized by reduction method in 25oC and Ar atmosphere. The effect of starch as stabilizer of nano scale Zero Valent Iron (nZVI) particles on solution stability and size of particles were investigated. Starched-Fe/Ni nanoparticles and non-coated Fe/Ni nanoparticles was characterized by scanning electron microscope (SEM), Dynamic light scattering (DLS) and pictures of solutions in various time which indicate settling time of suspensions. Results demonstrated that using water soluble starch solution for coating the Fe/Ni nanoparticles, reduced the particles diameter from about 80 nm (related to non-coated Fe/Ni nanoparticles) to 30 nm and also increased settling time of the nanoparticles suspension, so the solution of starch coated bimetallic nanoparticles was stable.