We report the preparation of copper sulphide nanoparticles from copper(II) piperidine dithiocarbamate. Powder XRD patterns confirmed covellite copper sulphide (CuS) for nanoparticles obtained at 120 °C while nanoparticles prepared at 180 and 220 °C exist in digenite copper sulphide (Cu 9 S 5 ) crystalline phases. TEM micrographs showed CuS obtained at 120 °C have mixture of hexagonal, triangular, and spherical shapes with no agglomeration with crystallite sizes in the range 4.9–51.4 nm. Copper sulphide obtained at 180 °C have particle sizes in the range 31.3–44.0 nm while agglomerated particles were obtained at 220 °C with particle sizes of 74.4–125.4 nm. The results confirmed that the particle sizes of the as-prepared copper sulphide nanoparticles are temperature dependent. Optical studies of the copper sulphide nanoparticles indicates the absorption band edges are blue shifted due to decreased crystallite sizes of the nanoparticles compared to bulk copper sulphide.

中文翻译：

---

来自哌啶二硫代氨基甲酸铜 (II) 的硫化铜纳米粒子的光学和结构表征

我们报告了从二硫代氨基甲酸哌啶铜 (II) 制备硫化铜纳米颗粒。粉末 XRD 图案证实了在 120 °C 下获得的纳米颗粒的铜镍钴硫化物 (CuS)，而在 180 和 220 °C 下制备的纳米颗粒存在于硫化铜 (Cu 9 S 5 ) 晶相中。TEM 显微照片显示，在 120 °C 下获得的 CuS 具有六边形、三角形和球形的混合物，没有团聚，晶粒尺寸在 4.9-51.4 nm 范围内。在 180 °C 下获得的硫化铜的粒径范围为 31.3–44.0 nm，而在 220 °C 下获得的附聚颗粒的粒径为 74.4–125.4 nm。结果证实，所制备的硫化铜纳米颗粒的粒径与温度有关。