| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1490769 | Materials Research Bulletin | 2011 | 5 Pages |
Single-phase Bi0.5Sb1.5Te3 compounds have been prepared by hydrothermal synthesis at 150 °C for 24 h using SbCl3, BiCl3 and tellurium powder as precursors. X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) have been applied to analyze the phase distributions, microstructures and grain sizes of the as-grown Bi0.5Sb1.5Te3 products. It is found that the hydrothermally synthesized Bi0.5Sb1.5Te3 nanopowders have a morphology dominated by irregular hexagonal sheets due to the anisotropic growth of the crystals. The Bi0.5Sb1.5Te3 nanosheets are parallelly stacked in certain direction to form sheet-agglomerates attribute to the temperature gradients in the solution.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Single-phase Bi0.5Sb1.5Te3 powders have been synthesized by a hydrothermal route. ► Hexagonal Bi0.5Sb1.5Te3 naosheets due to the anisotropic growth of the crystals. ► The temperature gradients lead to directional arrangement nanosheet-agglomerates. ► Nanosheet-agglomerates are beneficial for improving the TE property of products. ► A maximum figure of merit of 0.86 is achieved at about 100 °C.
