Solvothermal synthesis of ternary sulfides of Sb2-x BixS3 (x = 0.4, 1) with 3D flower-like architectures

Springer New York LLC
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Journal Article
Nanoscale Research Letters, 2010, 5 (2), pp. 364 - 369
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Flower-like nanostructures of Sb2 - x Bi x S3 (x = 0.4, 1.0) were successfully prepared using both antimony diethyldithiocarbamate [Sb(DDTC)3] and bismuth diethyldithiocarbamate [Bi(DDTC)3] as precursors under solvothermal conditions at 180 °C. The prepared Sb2 - x Bi x S3 with flower-like 3D architectures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), high-resolution transmission electron microscopy (HRTEM), and selected area electron diffraction (SAED). The flower-like architectures, with an average diameter of ~4 ?m, were composed of single-crystalline nanorods with orthorhombic structures. The optical absorption properties of the Sb2 - x Bi x S3 nanostructures were investigated by UVVisible spectroscopy, and the results indicate that the Sb2 - x Bi x S3 compounds are semiconducting with direct band gaps of 1.32 and 1.30 eV for x = 0.4 and 1.0, respectively. On the basis of the experimental results, a possible growth mechanism for the flower-like Sb2 - x Bi x S3 nanostructures is suggested.
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