Simple approach to NiS2/Ag2S composites and their optical properties

NiS2/Ag2S composites have been successfully prepared through a simple approach by using nickel disulfide hollow microspheres as precursors under normal temperature and pressure. The morphologies and microstructures of NiS2 and NiS2/Ag2S composites were illustrated by SEM and TEM images. SEM images indicate the average diameter of the silver sulfide nanospheres is 100 nm. And the NiS2/Ag2S composites display strong luminescent emission in ultraviolet region. This approach provides a facile route for the synthesis of the NiS2/Ag2S composites with interesting optical property. Furthermore, this simple method could be applied to synthesize other composites. (c) 2008 Elsevier B.V. All rights reserved.