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首页> 外文期刊>Crystal growth & design >Controllable synthesis of Bi2Te3 intermetallic compounds with hierarchical nanostructures via electrochemical deposition route
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Controllable synthesis of Bi2Te3 intermetallic compounds with hierarchical nanostructures via electrochemical deposition route

机译：通过电化学沉积路线可控制地合成具有分层纳米结构的Bi2Te3金属间化合物

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摘要

Bismuth-tellurium intermetallic compounds have proven to be one of the best thermoelectric materials with the highest figure of merit and have proven to be very useful for devices operating at room temperature. Here, we report that the Bi2Te3 intermetallic compounds with novel hierarchical nanostructures can be successfully synthesized by an electrochemical deposition route, which presents a simple, quick, and economical method for the preparation of Bi2Te3 intermetallic compounds and the controllable growth of hierarchical nanostructures. Cyclic voltammetry was used to study the electrochemical reactions relevant to the growth of Bi2Te3 intermetallic compounds, and the electrochemical formation process of Bi2Te3 intermetallic compounds was also investigated in this paper. The synthetic parameters in this research allowed various structural manipulations for Bi2Te3 intermetallic compounds, and the formation mechanisms of Bi2Te3 intermetallic compounds with hierarchical nanostructures were proposed. The concentration ratio of Bi(NO3)(3) to Na2TeO3 was a key factor that affected the morphologies and structures of Bi2Te3 intermetallic compounds. These prepared novel hierarchical Bi2Te3 nanostructures are desired low dimensional thermoelectric building blocks for possibly achieving a high thermoelectric figure of merit.
机译：铋-碲金属间化合物已被证明是具有最高品质因数的最佳热电材料之一，并且已证明对于在室温下运行的设备非常有用。在这里，我们报道，具有新颖的分层纳米结构的Bi2Te3金属间化合物可以通过电化学沉积路线成功合成，这为Bi2Te3金属间化合物的制备和分层纳米结构的可控生长提供了一种简单，快速和经济的方法。用循环伏安法研究了与Bi2Te3金属间化合物的生长有关的电化学反应，并研究了Bi2Te3金属间化合物的电化学形成过程。该研究的合成参数允许对Bi2Te3金属间化合物进行各种结构操作，并提出了具有分层纳米结构的Bi2Te3金属间化合物的形成机理。 Bi（NO3）（3）与Na2TeO3的浓度比是影响Bi2Te3金属间化合物的形态和结构的关键因素。这些制备的新颖的分层Bi 2 Te 3纳米结构是期望的低维热电构建块，用于可能实现高热电性能。

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