Synthesis of Bi2Se3 thermoelectric nanosheets and nanotubes through hydrothermal co-reduction method |
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Authors: | Hongmei Cui Xia Li Feng Han RI Boughton |
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Institution: | a State Key Laboratory of Crystal Materials, Shandong University, 27 Shanda Nanlu, Jinan City, Shandong Province 250100, China b Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, USA |
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Abstract: | Bi2Se3 nanosheets and nanotubes were prepared by a hydrothermal co-reduction method at 150, 180, 200, and 210 °C. Bi2Se3 nanosheets, nanobelts and nanotubes were obtained. The Bi2Se3 nanoflakes are 50-500 nm in width and 2-5 nm in thickness. The Bi2Se3 nanotubes are 5-10 nm in diameter, 80-120 nm in length, and 1.3 nm in wall thickness. X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, and electron diffraction were employed to characterize the products. Experimental results showed that the nanosheets and the nanotubes are hexagonal in structure with a=4.1354 Å and c=27.4615 Å. A possible formation and crystal growth mechanism of Bi2Se3 nanostructures is proposed. |
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Keywords: | Bismuth selenide Thermoelectric material Nanotube Hydrothermal Co-reduction |
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