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热电Bi2Te3/Bi2Se3纳米“弹簧”材料的电化学组装
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商洛学院陕西省尾矿资源综合利用重点实验室

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国家自然科学基金资助(项目号:21873063)和商洛学院科研基金资助(项目号:19SKY001)


Electrochemical Assembly of Thermoelectric Bi2Te3/Bi2Se3 Nano-spring Materials
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Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University

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    摘要:

    为了探索制备具有高热电优值的一维纳米材料,采用脉冲电化学技术制备了一种热电Bi2Te3/Bi2Se3多层纳米线材料。对电沉积过程的监测结果表明,电沉积过程中体系电阻不断增大,随着电沉积的不断进行,体系电阻增大幅度越来越小。对电沉积产物进行退火处理,然后溶解掉模板,进行XRD测试,结果表明,所制备的产物是Bi2Te3/Bi2Se3,同时,有很多“卫星峰”出现在衍射图上,表明所制备的材料具有超晶格结构。运用FE-SEM、TEM对产物形貌进行分析,结果发现,所制备的材料是像“弹簧”一样形状的Bi2Te3/Bi2Se3多层纳米线。通过对脉冲时间的调节,可以实现对多层纳米线周期的调制。

    Abstract:

    Bi2Te3/Bi2Se3 multi-layered nanowire arrays with the spring morphology were firstly fabricated by pulsed current electrodeposition. Also, the deposition course was monitored by electrochemical workstation connecting with a computer. In addition, the phase structure and morphology were characterized by XRD, FE-SEM and TEM, inspectively. The results showed that the pulsed current electrodeposition method could be used to prepare multi-layered nanowire arrays. According to investigation, the whole resistance of the three-electrode electrochemical system gradually increased. But the increasing degree of the resistance became smaller and smaller. Besides, the results of XRD analysis showed that the as-deposited multi-layed nanowire arrays were Bi2Te3/Bi2Se3 nanowires. Meanwhile, there were some “satellite peaks” appeared in the XRD pattern. This also conformed the as-fabricated materials were multi-layered nanowires. What’s more, the morphology of the as-prepared materials was spring-like morphology. The two phases could be distinguished by their own color. In order to investigate the effect of pulsed time on the length of each periodical segment, we change the pulsed time and prepared another sample. According to the results of TEM, the length of each segment could be tuned.

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李晓龙,周春生,邸友莹,侯小洁,李燕怡,陈凤英,元春梅,黄娜,魏伟.热电Bi2Te3/Bi2Se3纳米“弹簧”材料的电化学组装[J].稀有金属材料与工程,2021,50(12):4486~4492.[Li Xiaolong, Zhou Chunsheng, Di Youying, Hou Xiaojie, Li Yanyi, Chen Fengying, Yuan Chunmei, Huang Na, Wei Wei. Electrochemical Assembly of Thermoelectric Bi2Te3/Bi2Se3 Nano-spring Materials[J]. Rare Metal Materials and Engineering,2021,50(12):4486~4492.]
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历史
  • 收稿日期:2020-12-09
  • 最后修改日期:2021-01-28
  • 录用日期:2021-03-08
  • 在线发布日期: 2022-01-09
  • 出版日期: 2021-12-24