Year: 2013
Type: article
Abstract: Thermoelectric materials, which can covert heat to electric energy for power generation and conversely convert electric energy to heat energy for refrigeration, thereby alleviate the growing energy crisis effectively.Bi 2 Te 3 is currently the best thermoelectric material for room temperature applications.Materials of lower dimensions can be used to obtain better properties, and therefore, Bi 2 Te 3 nanowires have higher thermoelectric conversion efficiencies.In this work, we prepared Bi 2 Te 3 nanowires very conveniently by using the liquid-phase synthesis method.Firstly, we synthesized Te nanowires colloidal solution, and then synthesized Bi 2 Te 3 nanowires on the basis of it.The heating temperature was optimally set at 170˚C, while it was found that the heating reaction time affected greatly the crystallinity of the Bi 2 Te 3 nanowires.Three sample groups were divided according to different heating reaction time.After synthesis, we analyzed systematically their structures and morphologies by XRD, SEM, and TEM.The crystallinity and yield of the third sample group, whose heating reaction time is 90 min, is much better than those of the other two groups, namely 30 min and 60 min, indicating that a long reaction process is required for the liquid-phase synthesis of Bi 2 Te 3 nanowires and thus lengthening appropriately the heating reaction time is helpful in achieving highly crystalline Bi 2 Te 3 nanowires.
Author: 明恩 凌
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2316743663