Synthesis and characterization of Bi2S3 nanorods by solvothermal method in polyol media

Bi2S3 nanorods were synthesized via a simple solvothermal process in polyol media through the reaction between Bi(NO3)3·5H2O, urea and CS2 at 150 °C for 15 h using diethylene glycol as solvent. The nanorods were characterized by XRD, TEM and SAED. The results showed that the products were well-crystallized orthorhombic phase with lattice parameters a = 11.15 Å, b = 11.3 Å and c = 3.984 Å, which are consistent with the value in standard JCPDS card No. 17-0320. DEG served as an excellent solvent and structure director. Besides, compared to water and EG as solvents, the DEG system can provide a mild and homogenous condition, which is favorable to anisotropic growth and increases the yield of high quality Bi2S3 nanorods. Based on the experimental results, the growth mechanism was discussed.