Preparation And Research Of IIB Sulfide And Alkaline-earth Metals Tungstate By Supported Liquid Membrane Route

The composition, shape, structure, size, tropism and arrangement of nanomaterials have crucial effects to their characters. Therefore, considerable effort has been devoted to the design and controlled fabrication of nanostructured materials so as to obtain all kinds of nanomaterials with anticipative characters. On the basis of the investigation and study of many reports, we explored a new synthesis method-supported liquid membrane (SLM) template. It simulates the selective transfers of the bio-membrane effectually. This dissertation did many works about IIB metal sulfide and alkaline-earth metal tungstate according heterogeneous nucleation at organic-inorganic non-soakage curving interface of above template.This paper took egg membrane as underprop of SLM system to synthesis ZnS, CdS and HgS hollow nanospheres. The diameter of ZnS, CdS and HgS increase by degrees.It can be found that different productions have both comparability and diversification, which provide important reference for the fabrication of nanomaterials. When we investigated crystal modifiers-some dissoluble organic molecule, we found -COOH groups enhance the inducing effect of template on the formation of CdS hollow spheres, contrarily, -NH2 weaken this kind of effect. According to experiment results, we also explore the morphology, structure and possible synthesis mechanism. Furthermore, the UV-vis absorption spectra of hollow CdS nanospheres shows more obvious blue shift than solid CdS nanospheres when their diameters are close.Base on the result of above, similar expand experiments of structure homologues tungstate were researched in SLM reaction system. Under the same experiment conditions, BaWO₄ hollow microtube, virgate SrWO₄, spherical BaWO₄ have been obtain. Additives can effectively control the morphologies of CaWO₄ SrWO₄ and BaWO₄. Ethylenediamine as additive destroy the hollow structure of BaWO₄. The results confirm the above proposed mechanism of ZnS, CdS and HgS hollow nanospheres.