Nickel nanoparticles and solids using organic solvents

Nickel colloids were prepared by codeposition of the metal with several org anic solvents: acetone, ethanol, 2-propanol, 2-methoxyethanol and 1,2-dimet hoxyethane at 77 K. The stabilities of the colloids and fine powders were m easured. The metallic films and active solids were obtained by evaporation under vacuum at room temperature. The Ni-2-methoxyethanol colloids are stab le over three months at room temperature, and the UV-VIS absorption spectra of the most stable colloids were obtained. A chemical characterization of Ni solids was carried out by several techniq ues such as elemental analysis, FT-IR spectroscopy, differential scanning c alorimetry (DSC), and thermogravimetry (TGA). The IR studies show the presence of the solvent in the solids, which was co nfirmed by microanalysis. From TCA, DSC, and TGA-FTIR the metal-solvent was studied. From TGA, the kinetic parameters of decomposition reaction were c alculated using the Freeman and Carroll equations.