Abstract
The synthesis of intermetallic Ni–Al nanoparticles by coreduction approach of several organometallic precursors with sodium naphthelide in nonaqueous solution was studied. The state of the art in nanoparticles synthesization is the selection of suitable precursors and the adaptation of colloid chemistry to nonaqueous media. The reduction of two organometallic precursors, bis(cyclopentadienyl)nickel, Ni(Cp)2, and nickel (II) acetylacetonate, Ni(Acac)2 as a source of Ni element of the intermetallic, in tetrahydrofuran (THF) solution under a dry Ar atmosphere at room temperature gave black particles, characterized by powder X-ray diffraction (p-XRD). The nanoparticles synthesized from Ni(Acac)2 precursor produce pure Ni nanoparticles, that are air stable and has stronger magnetic property compared to Ni(Cp)2, while nanoparticles synthesized from Ni(Cp)2 yielded Ni3C. The particles were investigated in more detail by hard X-ray photoemission spectroscopy (HX-PES). The HX-PES spectrums confirmed that the black particles synthesized from Ni(Cp)2 is Ni3C instead of pure Ni. In the meanwhile, Al source was determined by synthesis Al(°) from ethyl aluminum dichloride, AlEtCl2 in toluene and aluminum trichloride, AlCl3 in toluene as well as THF. By using the same synthetic method, the synthesis of intermetallic Ni–Al nanoparticles was studied with various ratio of Ni precursor to Al precursor. The results showed that the NiAl nanoparticles were successfully synthesized by using selected precursors, Ni(Acac)2 and AlCl3 in THF solvent. Ni–Al nanoparticles synthesized by this approach reached 10 at.% of Al.
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Fadil, N.A., Abe, H., Murakami, H., Govindachetty, S., Noda, K. (2012). Synthesis of Intermetallic Ni–Al Nanoparticles by Wet Chemistry Synthesis of Niacac2 and Alcl3 Precursors. In: Broekmans, M. (eds) Proceedings of the 10th International Congress for Applied Mineralogy (ICAM). Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27682-8_23
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DOI: https://doi.org/10.1007/978-3-642-27682-8_23
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