考察了采用均相沉淀法制备单分散ZnS和CdS纳米微粒时,溶液中SO2-4、NO-3和Cl-对粉末晶型的影响。结果表明,SO2-4、NO-3和Cl-对ZnS粉末晶型基本上没有影响;而在NO-3、SO2-4体系中得到闪锌矿型CdS粉末,在Cl-体系中,得到纤维锌矿结构CdS粉末。这是因为在Cl-体系中,Cl-和Cd2+的络合作用不仅改变了溶液中沉淀离子的过饱和度,更重要的是改变了溶液中生长基元的存在形式及其连接方式,从而生成了结构更稳定的纤维锌矿型CdS晶体。 The effects of SO2-4, NO-3 and Cl- on the crystal form of powders were investigated when the monodisperse ZnS and CdS nanoparticles were prepared by homogeneous precipitation. The results show that SO2-4, NO-3 and Cl- have almost no effect on the crystalline form of ZnS powder. In the NO-3 and SO2-4 systems, zinc blende CdS powder is obtained. In the Cl- system, Zinc ore structure CdS powder. This is because the complexation between Cl- and Cd2 + in Cl-system not only changes the supersaturation of precipitated ions in the solution, but more importantly, changes the existing form of the growth unit in the solution and its connection to generate The more stable structure of wurtzite CdS crystals.