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Controlled synthesis of PbSe nanotubes by solvothermal transformation from selenium nanotubes

机译：硒纳米管的溶剂热转化控制合成PbSe纳米管

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PbSe nanotubes were successfully synthesized by a reactive template approach via solvothermal transformation of trigonal selenium (t-Se) nanotubes in ethylene glycol. It was revealed that a relatively high reaction temperature (e. g., 200 degrees C), adequate ascorbic acid, and proper lead source were crucial for preparing PbSe nanotubes through shape-preserved transformation of t-Se nanotubes. Moreover, novel Se@ PbSe composite nanotubes consisting of Se nanotubes covered with a PbSe sheath were obtained by shortening the reaction time and subsequent removal of the inner Se nanotubes resulted in the formation of thin-walled PbSe nanotubes (less than 20 nm in wall thickness). On the basis of the experimental observations, a plausible mechanism for the formation of PbSe nanotubes as well as Se@ PbSe composite nanotubes was proposed. Furthermore, preliminary electrochemical measurements showed that the prepared PbSe nanotubes exhibited a good electrochemical activity.
机译：通过反应性模板方法，通过乙二醇中三角硒（t-Se）纳米管的溶剂热转化成功合成了PbSe纳米管。揭示了相对高的反应温度（例如200℃），足够的抗坏血酸和适当的铅源对于通过t-Se纳米管的形状保持转变来制备PbSe纳米管至关重要。此外，通过缩短反应时间并随后去除内部的硒纳米管，获得了由覆盖有铅硒管的硒纳米管组成的新型硒@硒化铅复合纳米管，从而形成了壁厚小于20 nm的PbSe纳米管。 ）。基于实验观察，提出了形成PbSe纳米管以及Se @ PbSe复合纳米管的合理机制。此外，初步的电化学测量表明所制备的PbSe纳米管表现出良好的电化学活性。

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