Coverage Ability of Silver Sulfide Nanoparticles in Sulfide Composites

Sulfide composites ZnS/Ag₂S with various contents of silver sulfide have been synthesized by chemical co‑deposition. The sizes of ZnS and Ag₂S nanoparticles in ZnS/Ag₂S composites containing less than 1.0 mol % Ag₂S are ~4 and <3 nm, respectively. The introduction of silver sulfide in ZnS/Ag₂S composites leads to the deposition of Ag₂S on the surface of ZnS nanoparticles. The doping of ZnS nanoparticles by only 1 mol % Ag₂S nanoparticles is enough to form a covering silver sulfide shell on the surface of ZnS nanoparticles.