SnS nanopowders were successfully prepared by direct precipitation method and homogeneous precipitation method using stannous chloride hydrate(SnCl_2·2H_2O) as the starting material and sodium sulphide hydrate(Na_2S·9H_2O) and thioacetamide(TAA) as precipitating agent.The obtained specimen were characterized by X-ray diffraction(XRD),energy dispersive X-ray spectroscopy(EDS) and scanning electron microscopy(SEM),the influence of heat-treated on the structure performance was proposed,and a comparison between...