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通过可控溶剂热法,利用乙二胺作为模板制备出簇形和花形硫化镉(CdS)纳米结构.通过X射线衍射(XRD)和扫描电镜(SEM)观测其形貌和结构特征.XRD谱线显示,簇形CdS为六方晶体结构,而花形CdS纳米结构则为立方晶体.实验结果表明,整个自组装过程是由成核以及成核竞争引起的不同生长过程所组成的,并且乙二胺的模板功能起了重要的作用.通过不同时间和温度的实验,深入探讨了簇形和花形CdS纳米结构的自组装机理.室温光致发光谱(PL)显示这两种纳米结构在433nm和565nm附近有较强的发射峰,分别对应激子发射和表面缺陷发光.通过Brunauer-Emmett-Teller(BET)方法测试其比表面积.研究了高压汞灯照射下,簇形和花形CdS纳米结构在甲基橙(MeO)溶液中的光催化性能.结果显示,由于其较大的比表面积,花形CdS纳米结构的光催化性能要远优于其它CdS材料.
The cluster-shaped and flower-shaped cadmium sulfide (CdS) nanostructures were prepared by controlled solvothermal method using ethylenediamine as a template.The morphology and structure of CdS nanostructures were observed by X-ray diffraction (XRD) and scanning electron microscopy (SEM) The results show that the cluster CdS is hexagonal crystal structure and the flower-shaped CdS nanostructure is cubic crystal.The experimental results show that the entire self-assembly process is composed of different growth processes caused by nucleation and nucleation competition, and ethylenediamine Of the template function played an important role.Through different time and temperature experiments, in-depth discussion of cluster-shaped and flower-shaped CdS nanostructures self-assembly mechanism.Polymerization at room temperature showed that the two nanostructures at 433nm and 565nm The specific emission of the CdS nanostructures with cluster-shaped and flower-shaped CdS nanostructures was studied by Brunauer-Emmett-Teller (BET) The results show that the photocatalytic performance of the flower-shaped CdS nanostructures is much better than that of other CdS materials due to its large specific surface area.