Abstract
In this study a facile and novel seed-induced synthesis for the production of pure hexagonal nickel sulfide (h-NiS) nanoparticles at low temperatures (190°C) is reported. The seeds are formed by the reaction between nickel acetate (NA) and sodium sulfide (Na2S), acting as nucleation and growth sites for hexagonal nanoparticles. Without the use of seeds, more reaction time was needed to only achieve hexagonal-like morphologies; with 1% of the original quantity of nickel salt used as seeds the nanoparticle's formation was optimized, yielding well-dispersed single-crystalline particles. The samples were investigated by powder X-ray diffraction (XRD), Field-Emission Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM).
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