简易、可控制备硫化铅纳米带

以硝酸铅和硫代乙酰胺为前体，十二烷基苯磺酸钠（SDBS）扮演了前体和表面活性剂的双重角色，制备出硫化铅纳米带。 采用透射电子显微镜、X射线衍射和光致发光对所制备的纳米带进行了表征。 结果表明，中间产物PbSO4在水热条件下对PbS纳米带的进一步形成主要起到模板作用。 进一步考察了纳米带形成机理，结果表明，中间产物PbSO4对表面活性剂是有制约性的，而当改变中间产物保持条件不变的情况下，模板效应失控，只能得到不规则的微晶体。 实验结果表明，制备硫化铅纳米带反应速度较为缓慢，易于控制，为制备不同形貌纳米带提供了一种有效方法。

A Simple and Controllable Preparation of PbS Nanobelts

PbS nanobelts were synthesized by a facile hydrothermal method using lead nitrate,thioacetamide and dodecyl benzene sulfonate(SDBS) as raw materials.SDBS played a dual role as both the starting material and surfactant in the reaction.The as-prepared nanobelts were characterized by transmission electron microscopy and X-ray diffraction.The photoluminescence property of the nanobelts was also studied.It was concluded that the intermediate PbSO4 could act as a template for the growth of PbS nanobelts under hydrothermal conditions.The formation mechanism of nanobelts was further investigated.The results indicated that the intermediate PbSO4 could paly restriction effect on the surfactant(SDBS).When PbSO4 was replaced by other lead composite,the surfactant would lose its role and irregular micro-crystals were obtained consequently.The formation of nanobelts was readily controlled under a slow reaction speed.The result presented here may open an efficient way to synthesizing nanobelts with different morphologies.