Effects of Hydrothermaly Synthesized Sb2Se3 Nanowires on the Thermoelectric Properties of Bi2Te3 Nanopowders

doi:10.3724/SP.J.1077.2010.00615

Abstract

Abstract: Sb₂Se₃nanowires were synthesized by a hydrothermal method at 150℃ for 3, 6,12 and 24 h using SbCl₃ and Se powder as the precursors, N₂H₄·H₂O as reductant. X-ray diffraction (XRD), transmission electron microscope (TEM), field emission scanning electron microscope (FESEM) and high-resolution TEM (HRTEM) were applied to analyze the phase distributions, microstructures and grain sizes of the nanostructured Sb₂Se₃. It was found that the pure orthorhombic Sb₂Se₃ nanowires were formed at 150℃ for 24h by the hydrothermal synthesis method. The reaction mechanism and crystal growth mechanism of Sb₂Se₃nanowires were investigated in the light of the experimental results. The Sb₂Se₃nanowires grow along the [001] direction. The formation mechanism is mainly related to the special crystal structure of Sb2Se3. The TE properties of SPS nanocomposites of Bi₂Te₃with different amount of Sb₂Se₃ nanowires were investigated. The addition of 1 at% Sb₂Se₃ nanowires can improve the electric properties of the Bi₂Te₃ nanopowders.

Key words: hydrothermal synthesis, Sb₂Se₃, nanowires, thermoelectric properties

CLC Number:

TQ134

ZHANG Yan-Hua1,2, XU Gui-Ying1, GUO Zhi-Min2, HAN Fei1, WANG Ze1, GE Chang-Chun1. Effects of Hydrothermaly Synthesized Sb₂Se₃ Nanowires on the Thermoelectric Properties of Bi₂Te₃ Nanopowders[J]. Journal of Inorganic Materials, 2010, 25(6): 615-620.

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Effects of Hydrothermaly Synthesized Sb₂Se₃ Nanowires on the Thermoelectric Properties of Bi₂Te₃ Nanopowders

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