PbTiO3 nanoparticles, carbon quantum dots CQDs and their composite (i.e. PbTiO3/CQDs) were prepared and studied using XRD, FT-IR, VSM, TEM, BET, PL, FESEM, UV-is, and EDX. Designing highly-effective PbTiO3/CQDs binary nano-hybrids include several fascinating properties of visible light, biocompatibility, eco-friendly response and good durability. Various composites containing different amounts of CQDs were prepared, and the effects of catalysts on enhancing the photocatalytic activity of PbTiO3 nanoparticles in the resulting binary nano hybrid have been investigated. Test experiments indicated that PbTiO3 nanoparticles could remove only 53% of Rh B, while PbTiO3/5%CQDs binary nano-hybrids reached a removal maximum of 100%. Further the removal of different dyes using the PbTiO3/CQDs binary nano-hybrids has been evaluated and the removal mechanism has also been discussed.