氢氧化镍纳米粒子的水热合成与表征

Hydrothermal synthesis and characterization of β-Ni(OH)_2 nanoparticles

采用无定形的Ni（OH）2沉淀水热晶化法,我们合成了粒径为50~90 nm的β-Ni（OH）2纳米粒子。用场发射扫描电子显微镜（FE-SEM）、X射线衍射仪（XRD）、傅立叶变换红外光谱（FTIR）和能量散射谱（EDS）等技术表征了其形貌和结构。实验结果表明：在较高的pH值下,仅仅纳米粒子能够被获得,其形貌近似于球形,结构属于水镁石结构。我们讨论了纳米粒子可能的生长机理。

The β-Ni（OH）2 nanoparticles with the size of 50~90 nm were synthesized by hydrothermal crystalline treatment of the amorphous nickel hydroxide precipitation.The structure and morphology of the asprepared nanoparticles were characterized by field emission scanning electron microscopy（FE-SEM） images,X-ray diffraction（XRD）,fourier transform infrared（FTIR） spectroscopy and energy dispersive spectrum（EDS）.The experimental results showed the nickel hydroxide nanoparticles can be only obtained under the condition of the higher OH– concentration.The morphology of the synthesized sample closes to spherical shape and it has a brucite-like structure.A possible growth mechanism of the nanoparticles is discussed.