A series of metal sulfides have been used to sensitize titanium metal–organic frameworks to form heterostructures through a facile photodeposition strategy. Graphene-like MoS₂ sheets, Ag₂S, CdS and CuS quantum dots were uniformly deposited onto MIL-125(Ti) under ultraviolet light conditions. The as-obtained heterostructure hybrids exhibited interesting photocatalytic activity for Cr(VI) reduction under visible light irradiation.