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Advances in Nano Research
  Volume 2, Number 2, June 2014 , pages 77-88

Novel solvothermal approach to hydrophilic nanoparticles of late transition elements and its evaluation by nanoparticle tracking analysis
Marion Collart Dutilleul, Gulaim A. Seisenbaeva and Vadim G. Kessler

    Solvothermal treatment of late transition metal acetylacetonates in a novel medium composed either of pure acetophenone or acetophenone mixtures with amino alcohols offers a general approach to uniform hydrophilic metal nanoparticles with high crystallinity and low degree of aggregation. Both pure metal and mixed-metal particles can be accesses by this approach. The produced materials have been characterized by SEM-EDS, TEM, FTIR in the solid state and by Nanoparticle Tracking Analysis in solutions. The chemical mechanisms of the reactions producing nanoparticles has been followed by NMR. Carrying out the process in pure acetophenone produces palladium metal, copper metal with minor impurity of Cu2O, and NiO. The synthesis starting from the mixtures of Pd and Ni acetylacetonates with up to 20 mol% of Pd, renders in minor yield the palladium-based metal alloy along with nickel oxide as the major phase. Even the synthesis starting from a mixed solution of Cu(acac)2 and Ni(acac)2 produces oxides as major products. The situation is improved when aminoalcohols such as 2-aminoethanol or 2-dimethylamino propanol are added to the synthesis medium. The particles in this case contain metallic elements and pairs of individual metals (not metal alloys) when produced from mixed precursor solutions in this case.
Key Words
    metal nanoparticle; solvothermal synthesis; solvent effect; beta-hydrogen transfer; solution stability
Marion Collart Dutilleul: Ecole National Supériore de Chimie de Clermont Ferrand, 24 Avenue des Landais, 63170 Aubière, France
Gulaim A. Seisenbaeva and Vadim G. Kessler: Department of Chemistry, Biocenter, Swedish University of Agricultural Sciences, Box 7015, SE-75007 Uppsala, Sweden

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