Preparation Of Nanocrystalline Chalcogenides, Characterization And Performance Study

The liquid phase method was used in this study to prepare highly dispersed sphere-like Bi₂S₃ nanocrystals with R-O-C=S(S)-Bi as the single-source precursor, which has a series of advantages, such as simple, fast and high purity of products. The morphology of the products could be controlled effectively by the solvothermal method if the proper solvents and reaction conditions were chose. Sb₂S₃ nanorods were successfully prepared at 180 °C for 3h with bismuth nitrate (Bi (NO₃)₃·5H₂O) and thiourea ((NH₂)₂CS) as the raw materials, ethylene glycol as the solvent. Similarly, Sb₂S₃ nanorods were prepared with antiminy trichloride (SbCl₃) instead of Bi (NO₃)₃·5H₂O and other reaction conditions were unchanged. Many other methods such as microwave irradiation, solid state reaction, sonochemical method were also used to prepare Bi₂S₃ nanocrystals in this study. The products were characterized by IR, TG, XRD and TEM. The mechanism of formation of the products was discussed.