Solution-Chemical Syntheses of Nano-Structured Bi2Te3 and PbTe Thermoelectric Materials |
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| Authors: | X. Ji B. Zhang T.M. Tritt J.W. Kolis A. Kumbhar |
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| Affiliation: | (1) Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, USA;(2) Department of Chemistry, Clemson University, Clemson, SC 29634, USA;(3) EM Facility, Clemson University, 91 Technology Drive, Anderson, South Carolina 29630, USA |
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| Abstract: | In this work, nano-structured Bi2Te3 and PbTe thermoelectric materials were synthesized separately via solvothermal, hydrothermal and low-temperature aqueous chemical routes. X-ray diffraction (XRD), field-emission scanning-electron microscopy (FESEM), transmission electron microscopy (TEM), and energy dispersive spectroscopy (EDS) were used to analyze the powder products. Results showed that the as-prepared Bi2Te3 samples were all single-phased and consisted of irregular spherical granules with diameters of ∼30 nm whereas the PbTe samples were mainly composed of well-crystallized cubic crystals with average size of approximately 100 nm. Some nanotubes and nanorods were found in Bi2Te3 and PbTe samples, respectively; these were identified as Bi2Te3 nanotubes and PbTe nanorods by EDS analysis. Possible reaction mechanisms for these syntheses are discussed in detail herein. |
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| Keywords: | Thermoelectric materials nano-structured Bi2Te3 PbTe solution-chemical synthesis reaction mechanism |
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