Large-scale surfactant-free synthesis of p-type SnTe nanoparticles for thermoelectric applications
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A facile one-pot aqueous solution method has been developed for the fast and straightforward synthesis of SnTe nanoparticles in more than ten gram quantities per batch. The synthesis involves boiling an alkaline Na2SnO2 solution and a NaHTe solution for short time scales, in which the NaOH concentration and reaction duration play vital roles in controlling the phase purity and particle size, respectively. Spark plasma sintering of the SnTe nanoparticles produces nanostructured compacts that have comparable thermoelectric performance to bulk counterparts synthesised by more time- and energy-intensive methods. This approach, combining an energy-efficient, surfactant-free solution synthesis with spark plasma sintering, provides a simple, rapid and inexpensive route to p-type SnTe nanostructured materials.
Han , G , Zhang , R , Popuri , S R , Greer , H F , Reece , M J , Bos , J-W G , Zhou , W , Knox , A & Gregory , D 2017 , ' Large-scale surfactant-free synthesis of p-type SnTe nanoparticles for thermoelectric applications ' Materials , vol 10 , no. 3 , 233 . DOI: 10.3390/ma10030233
Copyright 2017 the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
This work was financially supported by the EPSRC (EP/K022156/1 and EP/P510968/1). The authors thank Mr Peter Chung for assistance with SEM. SRP and JWGB acknowledge the EPSRC for support (EP/N01717X/1). MR and RZ would like to acknowledge the EPSRC for support under the DEFCOM grant (EP/N022726/1). RZ acknowledges the support from a Marie Curie International Incoming Fellowship within the 7th European Community Framework Programme (Contract No. PIIF-GA-2013-624474).
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