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

Abstract Bi 2 S 3 nanorods were synthesized via a simple solvothermal process in polyol media through the reaction between Bi(NO 3 ) 3 ·5H 2 O, urea and CS 2 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 A, b = 11.3 A and c = 3.984 A, 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 Bi 2 S 3 nanorods. Based on the experimental results, the growth mechanism was discussed.