Uniform Bi_2S_3 nanorods-assembled hollow spheres with excellent electrochemical hydrogen storage abilities

摘要

Hierarchical Bi_2S_3 hollow spheres have been synthesized by a facile solvothermal process in the presence of sodium tartrate. The hollow spheres are composed of numerous ultra-thin nanorods with the average diameter of 15 nm. Based on the time dependent electron microscope observations, the formation mechanism of such hierarchical structures has been proposed as a sodium tartrate directed self-assembled process and oriented attachement mechanism. The morphology and size of the subunits can be controlled by adjusting the amount of sodium tartrate. The Nitrogen adsorption-desorption measurements suggest that mesopores exist in these hollow spheres. The as-derived Bi_2S_3 hollow spheres exhibit excellent electrochemical hydrogen storage properties.