Controlled synthesis of high crystalline bismuth sulfide nanorods: using bismuth citrate as a precursor

摘要

Well-segregated bismuth sulfide (Bi_2S_3) nanorods with a high order of crystallinity have been successfully prepared from bismuth citrate by a simple reflux reaction in DMF at 160degC.Bismuth citrate and thiourea act as the precursor materials.The products were characterized by powder X-ray diffraction,X-ray photoelectron spectroscopy,transmission electron microscopy (TEM,HRTEM),scanning electron microscopy,selected area electron diffraction and energy-dispersive X-ray microanalysis.Bismuth citrate,which is known to be a linear polymer,may play a critical role as a precursor and a template for the growth of linear Bi_2S_3 nanorods.