PbS nanostructures were successfully synthesized in high yield by a facile solvothermal process at 160℃ for 24h, employing lead nitrate(Pb(NO3 )2) and thiourea(SC(NH2)2) as precursors. A new surfactant tetrabu-tyl ammonium bromide(TBAB), was used in this process. The morphology, structure, and phase composition of PbS crystals were determined by X-ray diffraction( XRD). Scanning electron microscopy(SEM), transmission electron microscopy (TEM), Raman spectroscopy and photoluminescence emission. The results show that the mean diameter of the as-prepared PbS cube is about 1. 5μm and the six (100) faces are depressed to form a unique structure. It is also demonstrated that the morphologies of PbS crystals are significantly influenced by reaction time. A growth process is proposed for the formation of depressed PbS cubes.%以硝酸铅和硫脲为反应前驱体,以一种新的表面活性剂四正丁基溴化铵为封端剂,采用简单的溶剂热法在160℃反应24h成功制备了大量PbS纳米结构.利用XRD、SEM、TEM、荧光光谱以及拉曼光谱表征了产物的形貌、结构和物相.结果表明,所制备的PbS呈立方体状,其6个(100)面向内凹陷形成了独特的凹陷立方体结构,边长约为1.5μm；实验证明反应时间对产物的形貌具有重要的影响.并提出了凹陷立方体的形成机理.
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