(514d) Preparation of Nickel Nanoparticles in the Presence of Sodium Dodecyl Sulfate - Polyvinylpyrrolidone Clusters

Polyvinylpyrrolidone (PVP) and sodium dodecyl sulfate (SDS) can form clusters (bound-micelles) in aqueous solution. In our study, we found nickel ions interact with SDS-PVP clusters as a supermolecule interaction. The existence of this interaction indicated the template function of the SDS-PVP clusters. In the presence of SDS-PVP clusters, nickel nanoparticles were obtained by reduction of nickel chloride with NaBH₄. The prepared particles were characterized by transmission electron microscope (TEM) and FT-IR. The results show that the dispersion and average size of spherical nickel nanoparticles can be controlled by mediating SDS-PVP clusters; additionally, PVP molecules adsorbed onto the particles. The template function of SDS-PVP clusters was studied via surface tension, ultra-filtration, UV Spectroscopy, etc. From the experiment results, we deduce that PVP and SDS were both accounted for the role of template. First, nickel ions associated onto the headgroup of SDS-PVP clusters by electrostatic interaction when the nickel nanoparticles formed by reduction, then PVP adsorbed onto the particals' surface to prevent the agglomeration of nickel particles and stabilize the nanoparticles.

^† corresponding author: Yun FANG

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