Robust scalable synthesis of surfactant-free thermoelectric metal chalcogenide nanostructures

Authors

Chao Han, University of WollongongFollow
Zhen Li, University of Wollongong, Soochow UniversityFollow
Gao Qing (Max) Lu, University of QueenslandFollow
S X. Dou, University of WollongongFollow

RIS ID

100939

Publication Details

Han, C., Li, Z., Lu, G. & Dou, S. Xue. (2015). Robust scalable synthesis of surfactant-free thermoelectric metal chalcogenide nanostructures. Nano Energy, 15 193-204.

Abstract

A robust low-cost ambient aqueous method for the scalable synthesis of surfactant-free nanostructured metal chalcogenides (MaXb, M=Cu, Ag, Sn, Pb, and Bi; X=S, Se, and Te; a=1 or 2; and b=1 or 3) is developed in this work. The effects of reaction parameters, such as precursor concentration, ratio of precursors, and amount of reducing agent, on the composition, size, and shape of the resultant nanostructures have been comprehensively investigated. This environmentally friendly approach is capable of producing metal chalcogenide nanostructures in a one-pot reaction on a large scale, which were investigated for their thermoelectric properties towards conversion of waste heat into electricity. The results demonstrate that the thermoelectric properties of these metal chalcogenide nanostructures are strongly dependent on the types of metal chalcogenides, and their figure of merits are comparable with previously reported figures for their bulk or nanostructured counterparts.