Synthesis of nanocrystalline NiS with different morphologies

Millerite NiS nanocrystals have been prepared through the solvent (hydro-) thermal method. The XRD patterns indicated that the products were pure millerite NiS with cell parameters a=9.624(4) A˚, c=3.150(1) A˚. Using ethylenediamine and hydrazine hydrate as solvent resulted in the formation of rod-like nanocrystalline NiS, whereas spherical nanoparticles were obtained using aqueous ammonia as solvent. The products obtained have relatively high surface areas, which favors the application in catalysis. [Copyright &y& Elsevier]