An efficient and stable CuO-TiO 2 nanocomposite photocatalyst was synthesized by using the simple molten-salt method. Characterization by HR-TEM confirmed the existence of both TiO 2 and CuO in the nanocomposite, revealing hexagonal TiO 2 nanoparticles (NPs) with average particles size of 23.8 nm. CuO QDs decorated on the TiO 2 surface were in the range of 2.2 to 4.6 nm. Photocatalytic experiments for hydrogen (H 2 ) production were carried out under an LED (λ = 365 nm) lamp and natural solar light. The effect of Cu-loading in CuO-TiO 2 NCs and synthesis time were studied. The optimized CuO-TiO 2 NCs abbreviated as CuT-4 and CuT-3 showed 27.7-and 9.0-fold superior rate of H 2 production compared to pristine TiO 2 NPs under LED and solar irradiation, respectively. At optimal conditions, CuO-TiO 2 NCs demonstrated good photostability for H 2 evolution during 75 h illumination under LED light. The experimental results confirmed the cocatalytic role of CuO for improved H 2 generation by a minimized recombination of excitons.