不同形貌PbS纳米粒子形成机理的探讨

摘要

PbS nanoparticles with different morphologies, such as spherical, cubical, spindle-shaped, shuttle-shaped and rod-like, were prepared in W/O microemulsion solutions containing P-Octyl polyethylene glycol phenylether (OP), n-pentanol, cyclohexane and water. Morphologies of PbS nanoparticles were characterized by transmission electron microscopy (TEM). The influences of molar ratio of water to surfactant (w0), the concentration of the reactant and aging time on the morphologies of the PbS nanoparticles were studied. The formation mechanisms for different morphologies of PbS nanoparticles in W/O microemulsions were also discussed.%采用聚乙二醇辛基苯基醚(OP)/正戊醇/环己烷/水溶液所形成的W/O型微乳液中的水核作软模板,合成了不同形貌如球形、立方体形、纺锤形、梭形和棒形的PbS纳米粒子.运用透射电子显微镜(TEM)对产物的形貌进行了表征.考察了W/O型微乳液中水与表面活性剂的物质的量的比(ω0)、反应物浓度和陈化时间等条件对产物形貌的影响.对不同形貌PbS纳米粒子的形成机理进行了探讨.