Chalcogenide Semiconductor Nanocrystals Synthesis And Characterization

Bi₂S₃ and Sb₂S₃ nanorods were firstly synthesized from the precursors M{S₂COC₄H₉}₃(C₅H₅N)₂(M=Bi,Sb)and M{S₂COC₄H9}₃(C₁₂H₈N₂)(M=Bi,Sb)via hydrothermaltreatment at 180℃for 20 h. The products have been characterized by XRD, TEM, SEMand UV-vis spectra. The XRD patterns show that both of the products belong to theorthorhombic M₂S₃ phase and the products are highly pure. Transmission electronmicroscopic (TEM) and scanning electron microscopy (SEM) studies reveal the rodlikeappearance of Bi₂S₃ with a diameter in the range of 30-50 nm and a length in the range of0.2—0.3μm. The Sb₂S₃ nanorods have been prepared using PVP as surfactant at 200℃for 20 h. TEM and SEM studies reveal the rodlike appearance of Sb₂S₃ with a diameter inthe range of 300-500 nm and a length over 10μm.Sb₂Se₃ nanocrystals were synthesized from SbCl₃ and Na₂SeSO₃ via a hydrothermaltreatment at 180℃and pH=9-10 for 20 h. The XRD patterns show that the productbelongs to the orthorhombic Sb₂Se₃ phase and the product is phase pure. TEM and SEMstudies reveal the ribbonlike appearance of Sb₂Se₃ with breadth in the range of 200-300 nmand a length over 10μm.