生物分子辅助水热法合成树枝状硫化镉

Biomolecule-assisted Hydrothermal Synthesis of Hierarchical CdS Dendrites

以CdCl2.2.5H2O和硫脲作先驱物,L-α-丙氨酸作为修饰剂,水热法合成了树枝状的硫化镉。采用XRD、SEM等表征手段对样品的相组成、形态、结构进行了考察。实验表明,反应时间,硫脲和L-α-丙氨酸对样品的形貌具有重要影响:随着时间的延长,硫化镉的形貌由花状逐渐变成树枝状,用硫代乙酰胺作为硫源或不加L-α-丙氨酸时均不能得到树枝状的硫化镉。荧光性质的研究表明,枝状硫化镉具有良好的荧光发光特性,探讨了枝状硫化镉可能的形成机制。

Large-scale hierarchical CdS dendrites were synthesized by hydrothermal treatment of CdCl2·2.5H2O using thiourea as precursor, and L-α-Aminopropionic acid as surface modifier. The phase composition, morphology, and structure of CdS were examined by X-ray diffraction （XRD）, scanning electron microscopy （SEM）. The results reveal that synthesized time, thiourea and L-α-Aminopropionic acid have influence on the morphology of CdS. With time prolonged, the morphology of CdS can be changed from flower to dendrites. The CdS with dendrites were not obtained using thioacetamide as a sulfur source or without L-α-Aminopropionic acid. Moreover, the flourscence of CdS was also investigated, the research show that CdS with dendrites have good luminescence properties. The formation mechanism of CdS with dendrites was proposed.