State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130021, P. R. China.
College of chemistry, Jilin University, Changchun, 130012, P. R. China.
Chemistry. 2018 Jul 11;24(39):9765-9768. doi: 10.1002/chem.201801611. Epub 2018 Jun 12.
Bi Te hierarchical nanostrings have been synthesized through a solvothermal approach with the assistance of sucrose. The hierarchical Bi Te was supposed to be fabricated through a self-assembly process. Te nanorods first emerge with the reduction of TeO followed by heterogeneous nucleation of Bi Te nanoplates on the surface and tips of Te nanorods. Te nanorods further transform into Bi Te nanorods simultaneously with the nanoplates' growth leading to a hierarchical structure. By controlling the reaction kinetics by adding different amount of ethylene glycol, the length of nanorods and the number of nanoplates could be tailored. The use of sucrose is vital to the formation of hierarchical structure because it not only serves as a template for the well-defined growth of Te nanorods but also promotes the heterogeneous nucleation of Bi Te in the self-assembly process. The Bi Te nanomaterial shows a moderate thermoelectric performance because of its hierarchical structure. This study shows a promising way to synthesize Bi Te -based nanostructures through environmental friendly approach.
双碲纳米串通过溶剂热法在蔗糖的辅助下合成。这种分级双碲结构被认为是通过自组装过程形成的。碲纳米棒首先通过 TeO 的还原形成，然后在碲纳米棒的表面和尖端异质成核形成碲化铋纳米片。随着纳米片的生长，碲纳米棒进一步转化为碲化铋纳米棒，从而形成分级结构。通过添加不同量的乙二醇来控制反应动力学，可以调整纳米棒的长度和纳米片的数量。蔗糖的使用对于分级结构的形成至关重要，因为它不仅作为碲纳米棒的模板促进其生长，而且还在自组装过程中促进碲化铋的异质成核。由于其分级结构，这种碲化铋纳米材料表现出中等的热电性能。本研究为通过环保方法合成基于碲的纳米结构提供了一种有前途的途径。
