An efficient nanostructured Ag2S-ZnO for degradation of Acid Black 1 dye under day light illumination

► The Ag2S-ZnO was successfully synthesized by sol-gel method. ► This new method of preparation gives a homogeneous dispersion of Ag2S in ZnO. ► Ag2S-ZnO is more efficient than commercial ZnO for the mineralization of AB 1. ► The catalyst is found to be reusable. ► Treatment of dye effluent using Ag2S-ZnO will be more economical and eco-friendly.