Synthesis, characterization, optical and magnetic properties of a nickel sulfide series by three different methods; Superlattices and Microstructures

چکیده مقاله

Two methods of thermal decompo sition and hydrother mal routes were applied for synthesis of nickel sulfides of new precursor [Ni(TSC)2]Cl2 (TSC = thiosemicarbazide) and compared two methods with each other. Also another method by direct puttin g a mixed aqueous solution composed of NiCl2.6H2O and TSC (H2NNHCSNH2) into an autoclave without presence of any surfactants was examined to investigate the morphology of products. The effect of the reaction temperature on phase and morphology of as-synthesized products was investigated. The produc ts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), ultraviol et–visible spectroscopy (UV–Vis) and photoluminescence spectroscopy (PL). Magnetization measure ment indicates that NiS samples show a weak ferromagnetic behavior maybe due to nano-size effect.