Reduced graphene oxide-decorated CdS/ZnO nanocomposites for photoreduction of hexavalent chromium and photodegradation of methylene blue.CdS/ZnO/rGO, ZnO/CdS, and ZnO/rGO hetero-nanocomposites were successfully prepared by the facile one-pot solvothermal method. 
THERM