Photovoltaics: Sulfides like CdS and CuInSâ are used in thin-film solar cells due to their excellent light absorption and charge transport properties. Photocatalysis: ZnS nanoparticles can degrade organic pollutants under UV light, making them useful for environmental cleanup. Energy Storage: Sulfides such as MoSâ are explored as anode materials in lithium-ion batteries due to their high capacity and cycling stability. Sensors: Sulfide-based nanosensors can detect gases like HâS and NOâ at low concentrations, benefiting industrial and environmental monitoring.