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以Pb(NO3)2和KSCN为原料,水为溶剂,采用水热法制备出了三维的八足状PbS树枝晶。XRD测试表明粉体为面心立方结构,结晶性好;SEM照片显示粉体为八足状的三维超结构,每足的平均长度5μm,由边长600～800nm的片状纳米块自组装而成。结合PbS晶体的结构模型和样品SEM照片的跟踪观察,分析了八足状PbS树枝晶的生长演变过程,为超结构微晶的生长机理研究提供有益参考。
Using Pb (NO3) 2 and KSCN as raw materials and water as solvent, three-dimensional PbS dendrites with octapods were prepared by hydrothermal method. XRD results show that the powder has a face-centered cubic structure and good crystallinity. The SEM images show that the powder is an eight-dimensional three-dimensional super structure with an average length of 5 μm per foot and self-assembly from sheet-like nano-blocks with a side length of 600-800 nm to make. Combined with the structural model of PbS crystal and the SEM observation of the sample, the growth and evolution of PbS dendrites in eight-legged Pb-Zn crystals were analyzed and the results provided a useful reference for the study of the growth mechanism of the super-structured microcrystals.