Abstract: Large-scale high-quality Bi₂S₃ nanotubes were successfully prepared by a facile hydrothermal reaction between Bi(NO₃)₃ and Na₂S at a low reaction temperature. The morphology and structure of as-prepared samples were investigated by X-ray Diffraction(XRD), Scanning Electron Microscopy(SEM), Transmission Electron Microscopy(TEM), Selective-area Electron Diffraction(SAED) and High-resolution Transmission Electron Microscopy(HRTEM). The characterization results show that the nanotubes are well-crystallized orthorhombic Bi₂S₃ nanotubes with out diameter 100—500 nm, inner diameter 50—200 nm and lengths between 1 to 5 μm respectively. The growth mechanism of Bi₂S₃ nanotubes was proposed on the basis the results of experiment. The effects of reaction temperature and different mineralizers were also investigated.

Key words: Hydrothermal synthesis, Nanotube, Bismuth sulfide