For the first time, we report the novel synthesis of flocculus-like spheres of nickel hydroxy hydrate with grain size of ∼7nm via the thermolysis of nickel phthalate polymer. Nickel phthalate polymer formulated as [Ni(Pht)(H2O)]n was simply prepared via a precipitation procedure by mixing of 1,2-benzenedicarboxylic acid (phthalic acid) to nickel acetate salt under basic condition. Nickel hydroxy hydrate nanostructures were obtained by thermolysis of [Ni(Pht)(H2O)]n polymer in the presence of oleic acid (OA) at 190 °C and NiO nanoparticles were formed via the thermolysis of nickel phthalate polymer in the presence of oleic acid and triphenylphosphine (TPP) at higher temperature. Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were applied for the characterization of products. The magnetic property of NiO nanoparticles were studied with vibrating sample magnetometer (VSM) at 300 K.
Keywords: Nanoparticles, Chelating bidentate ligand, Oleic acid, NiO, Nickel(hydr)oxide, Thermolysis, Metalorganic Frameworks, flocculus-like, facile synthetic route
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