PbSe纳米晶的溶剂热法制备与表征

Solvothermal Synthesis and Characterization of PbSe Nanocrystals

以Pb（Ac）2、Na2SeSO3分别作为铅源和硒源，自制的月桂酸硫脲咪唑啉季铵盐（SUDEI）作为表面活性剂，采用溶剂热法在醇水混合溶剂中得到不同形貌的PbSe纳米晶。通过透射电镜（TEM）、X射线衍射（XRD）、X射线光电子能谱（XPS）对PbSe纳米晶进行了表征。探讨了制备PbSe纳米晶的最佳条件，当月桂酸硫脲咪唑啉季铵盐浓度0．05mol·L^-1，反应温度150℃，反应时间12h，可制得分散较好的粒径约50～100nm的四方形硒化铅纳米晶。

Using Pb（Ac）2 and Na2SeSO3 as Pb source and Se source respectively, the self-made quaternary ammonium salt of 2-undecyl-l-dithioureido-ethyl-imidazoline （SUDEI） as surfactant, PbSe nanocrystals with different morphology were synthesized by a solvothermal method in the medium of ethanol and distillated water. The prepared PbSe samples were characterized by transmission electron microscopy （TEM）, X-ray diffraction （XRD） and X-ray photoelectron spectroscopy （XPS）. The optimum conditions for the preparation of PbSe were also discussed. The mono-dispersed rectangular PbSe nanocrystals with diameter of 50～100 nm could be obtained at 150 ℃ for 12 h in the presence of 0.05 mol · L^-1 SUDEI.