The MoS2 lamellas modified g-C3N4/SrTiO3 core-shell heterojunction is prepared via a simple continuous hydrothermal-annealing method. There, the g-C3N4 shell is deposited on the surface of as-prepared SrTiO3 nanosphere, and then the MoS2 lamellas grow on the surface of core-shell heterojunction. Evaluated by the hydrogen evolution, the as-prepared MoS2/g-C3N4/SrTiO3 core-shell heterojunction exhibits an obvious photocatalytic enhancement of about similar to 30 folds than single SrTiO3 nanospheres, which can be mainly ascribed to that, the core-shell heterojunction can promote the charge carriers separation efficiently and the Pt-like behavior MoS2 can promote the photo-generated electrons diffusing into water quickly. Additionally, the ultrathin MoS2 lamellas with a mass of edge S atoms can provide sufficient HER active sites and shorten photoelectron transport route to improve photocatalytic stability. (C) 2020 Elsevier Ltd. All rights reserved.