混合溶剂热法制备的CdS微纳米材料的结构及磁性能

以乙二胺(EN)、乙醇胺(EA)和乙二醇(EG)为纯溶剂和混合溶剂,以不同的S和Cd为源,成功地合成了几种特殊形貌的Cd S微/纳米结构材料,包括微米球、微米棒、纳米棒、纳米片和纳米颗粒。X射线衍射(XRD)分析表明,微/纳米结构的Cd S具有六角形纤锌矿结构。不同条件下制备的不同产物,扫描电镜(SEM)观察显示,在不同的制备条件下,Cd S形貌由微米球和纳米片组成。透射电子显微镜(TEM)观察显示,在不同的制备条件下,Cd S由纳米颗粒和纳米棒组成。用光学吸收光谱法测定了Cd S的光学性质,用振动样品磁强计(VSM)测量了Cd S纳米颗粒的室温铁磁性。Cd S纳米颗粒的最高饱和磁化强度为9.109 memu/g,Cd S纳米颗粒铁磁性主要是结构缺陷产生的。

Microstructure and magnetic properties of CdS micron/nanostructured materials prepared by mixed-solvothermal method

Several special CdS micro/nanostructures, including microspheres, microrods, nanorods, nanosheets and nanoparticles were successfully prepared via a simple solvothermal route using ethylenediamine (EN), ethanolamine (EA) and ethylene glycol (EG) as pure and mixed solvents with different S and Cd sources. X-ray diffraction (XRD) measurements show that micro/nanostructured CdS has a hexagonal wurtzite structure. Different products were prepared under different conditions, scanning electron microscopy (SEM) images show that the morphologies of CdS consist of microsphere and nanosheets at different preparation conditions. Transmission electron microscopy (TEM) images reveal that the CdS consists of nanoparticles and nanorods at different preparation conditions. The optical properties of the CdS were measured by optical absorption spectroscopy. Vibrating sample magnetometer (VSM) measuring reveals that the CdS nanoparticles exhibit room temperature ferromagnetism. The highest saturation magnetization of the CdS nanoparticles is 9.109 memu/g. The ferromagnetism origin of the CdS nanoparticles is attributed to structural defects.