Preparation and characterization of Co9S8 nanocrystalline and nanorods

[摘要] Hexagonal Co₉S₈ nanocrystal and nanorods were synthesized using cobalt chloride (CoCl₂.6H₂O), dimethyl sulfoxide (DMSO) and non-aqueous alcohol as the starting materials, and taking dimethyl sulfoxide as both sulfur source and strong infiltrator in nanorods preparation. The Co₉S₈ samples were characterized by X-ray diffraction (XRD), scanning tunneling microscope (SEM), transmission electron microscope (TEM), vibrating sample magnetometer (VSM) and laser Raman spectrometer. The results show that the as-prepared Co₉S₈ nanocrystal with a size of 6 nm take on weak paramagnetism at room temperature. The lengths and diameters of the nanorods were about 4 𝜇m and 200 nm, respectively. The reason for the relative lower synthesis temperature of nanorods was discussed and a ‘micro-autoclave reactor’ model was suggested as well.

[学科分类] 材料工程

[关键词] DMSO;nanostructures;annealing;infiltration.