Hydrothermal synthesis and magnetic properties of CoS2 nano-octahedrons

Hydrothermal synthesis and magnetic properties of CoS2 nano-octahedrons
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CoS2纳米八面体的水热合成及其磁性能

DOI:
10.1016/j.matlet.2011.05.064
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发表时间:
2011-09
期刊:
影响因子:
3
通讯作者:
Yan Xing
Yan Xing
中科院分区:
材料科学3区
文献类型:
--
作者:
Bo Liu;Fangfang Wang;Dafang Zheng;Xianchun Liu;Xiujuan Sun;Suying Hou;Yan Xing

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采用简单的水热法制备了均匀的纳米cos2单晶八面体。八面体结构具有高度的几何对称性,表面光滑,平均边长约为120nm。采用x射线衍射、扫描电镜、透射电镜对样品进行表征。对比实验表明,封盖剂聚乙烯基吡咯烷酮(PVP)和络合剂柠檬酸钠对八面体cos2纳米结构的形成起重要作用。基于这种形态随热液时间的演化,提出了一种可能的形成机制。此外,还详细讨论了cos2纳米八面体的磁性能。
Uniform single-crystalline CoS2nano-octahedrons have been prepared in high yield by a simple hydrothermal process. The octahedral structures exhibit a high geometric symmetry with smooth surfaces and the mean edge length is ~ 120 nm. X-ray diffraction, scanning electron microscopy, transmission electron microscopy were used to characterize the samples. Contrast experiments indicate that the capping agent poly(vinyl pyrrolidone) (PVP) and the complexing agent sodium citrate play important roles for the formation of octahedral CoS2nanostructures. A possible formation mechanism was proposed based on the evolution of this morphology as a function of hydrothermal time. Additionally, the magnetic properties of the CoS2nano-octahedrons were discussed in detail.
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