Large scale synthesis of uniform CuS nanotubes in ethylene glycol by a sacrificial templating method under mild conditions
Large scale synthesis of uniform CuS nanotubes in ethylene glycol by a sacrificial templating method under mild conditions
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DOI：
10.1039/b606226a
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发表时间：
2006-08
影响因子：
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通讯作者：
Chunyan Wu;Shuhong Yu;Shaofeng Chen;Guannan Liu;Bian-Hua Liu
中科院分区：
文献类型：
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作者：
Chunyan Wu;Shuhong Yu;Shaofeng Chen;Guannan Liu;Bian-Hua Liu
以Cu纳米线为牺牲模板，选择合适的硫源进行硫化反应，在80 °C的乙二醇溶液中，通过简单的溶液反应可以大量合成出内径为30-90 nm、厚度为20-50 nm的均匀CuS纳米管，其中合适的硫源和溶剂对形成结构清晰的CuS纳米管起着至关重要的作用。结果表明，与硫粉相比，合适的硫源（例如硫脲和硫代乙酰胺）在分解温度下释放离子硫而不是分子硫，有利于CuS纳米管的形成。在更高的温度（140 °C）下进一步处理产物可以提高结晶度，但导致纳米管向内侧轻微收缩。此外，在水介质中的类似反应不能产生这样的纳米管。研究了CuS纳米管的形状演变过程、形成机理以及热稳定性。
Uniform CuS nanotubes of 30–90 nm in inner diameter and 20–50 nm in thickness, can be synthesized in large quantities by a facile solution reaction at 80 °C in ethylene glycol using Cu nanowires as sacrificial templates and choosing suitable sulfur sources for the sulfuration reaction, where suitable sulfur sources and solvent played crucial roles in the formation of well-defined CuS nanotubes. The results demonstrated that suitable sulfur sources such as thiourea and thiacetamide which release ionic sulfur rather than molecular sulfur at their decomposition temperature are favorable for the formation of CuS nanotubes, in contrast to sulfur powders. Further treatment of the product at higher temperature (140 °C) can improve the crystallinity but results in a slight shrinking of the nanotubes toward the inner side. In addition, the similar reaction in water media cannot produce such nanotubes. The shape evolution process and the formation mechanism of CuS nanotubes as well as the thermal stability of these nanotubes were studied.