液相化学还原法制备不同形貌的多晶纳米镍

Preparation of Ni nanocrystals with different morphologies by liquor-phase reduction

采用液相化学还原法,在1,2-丙二醇体系中,分别使用吐温-80(Tween-80)、聚乙二醇-6000(PEG-6000)和十二烷基硫酸钠(SDS)与聚乙二醇-6000(PEG-6000)的混合物作为修饰剂,利用1,2-丙二醇还原相同母体醋酸镍,制备形貌分别为海绵体、纤维状、雪花状的多晶纳米镍;在水体系中,使用SDS为修饰剂,利用水合肼还原相同母体醋酸镍,制备球形多晶纳米镍。通过X射线衍射(XRD)、透射电子显微镜(TEM)、选区电子衍射(SAED)对纳米镍进行表征。利用傅立叶红外(FTIR)分析初步解释不同形貌纳米镍的形成机理。

Ni nanocrystals with different morphologies, such as spongy, fibrillar, and snowflake-like, were prepared by using nickel acetate as precursor, 1, 2-propanediol as solvent and reductant, with different surfactants as modifiers. These modifiers are polyoxyethylene sorbitan monooil 80 （Tween-80）, polyethylene glycol 6000 （PEG-6000） and mixture of sodium dodecyl sulfate （SDS）＋PEG-6000, respectively. The spherical Ni nanocrystals were synthesized in nickel acetate solution by using hydrazine hydrate as reductant, with surfactant SDS as modifier. The as-prepared Ni nanoparticles were characterized by transmission electron microscope （TEM）, selected area electron diffraction （SAED）, powder X-ray diffractometer （XRD） and Fourier transform infrared （FTIR） spectroscopy. The fabrication mechanisms of Ni nanocrystals with different morphologies were investigated.