Institute of Geotechnics, Slovak Academy of Sciences, 04001 Košice, Slovakia.
Advanced Materials Department, Jožef Stefan Institute, Ljubljana 1000, Slovenia.
Molecules. 2019 Mar 15;24(6):1031. doi: 10.3390/molecules24061031.
In this study, CuInS₂/ZnS nanocrystals were synthesized by a two-step mechanochemical synthesis for the first time. In the first step, tetragonal CuInS₂ was prepared from copper, indium and sulphur precursors. The obtained CuInS₂ was further co-milled with zinc acetate dihydrate and sodium sulphide nonahydrate as precursors for cubic ZnS. Structural characterization of the CuInS₂/ZnS nanocrystals was performed by X-ray diffraction analysis, Raman spectroscopy and transmission electron microscopy. Specific surface area of the product (86 m²/g) was measured by low-temperature nitrogen adsorption method and zeta potential of the particles dispersed in water was calculated from measurements of their electrophoretic mobility. Optical properties of the nanocrystals were determined using photoluminescence emission spectroscopy.
本研究首次通过两步机械化学合成法制备了 CuInS₂/ZnS 纳米晶。在第一步中，从铜、铟和硫前体制备出四方相的 CuInS₂。所得的 CuInS₂ 与醋酸锌二水合物和九水合硫化钠进一步共研磨，作为立方相 ZnS 的前体。通过 X 射线衍射分析、拉曼光谱和透射电子显微镜对 CuInS₂/ZnS 纳米晶进行了结构表征。通过低温氮吸附法测量了产物的比表面积（86 m²/g），并根据电泳迁移率的测量计算了分散在水中的颗粒的动电电势。通过光致发光发射光谱确定了纳米晶的光学性质。
