Semiconductor-based　photocatalytic　materials　have　emerged　as　promising　candidates　for　solar-driven　hydrogen　production　and　oxygen　evolution　reactions.　Direct　Z-scheme　photocatalysts　offer　competitive　advantages　that　are　superior　to　single-component　or　intensively　studied　heterojunction　photocatalysts　in　photocatalytic　water　splitting.　The　development　of　high-performance　direct　Z-scheme　photocatalysts　is　crucial　to　improving　solar-driven　water　splitting　efficiency.　Herein,　we　report　the　fabrication　of　a　novel　g-C　3　N　4　/MoS　2　/Ag　3　PO　4　ternary　composite　and　its　application　in　photocatalytic　oxygen　evolution　under　white　light　LED　illumination.　As-exfoliated,　highly　conductive　two-dimensional　molybdenum　disulfide　(2D　MoS　2　)　nanoflakes　and　modified　graphitic　carbon　nitride　(g-C　3　N　4　)　nanosheets　were　employed　simultaneously　to　couple　with　oxygen-evolving　silver　orthophosphate　(Ag　3　PO　4　),　forming　a　dual　direct　Z-scheme　g-C　3　N　4　/MoS　2　/Ag　3　PO　4　(CMA)　composite　photocatalytic　system　for　highly　improved　oxygen　evolution　from　water　splitting.　The　optimal　CAM-20　exhibits　the　fastest　oxygen-producing　rate　of　232.1　μmol　L　-1　g　-1　h　-1　,　which　is　5　times　higher　than　that　of　bulk　Ag　3　PO　4　.　The　enhancement　in　the　photocatalytic　oxygen　evolution　can　be　ascribed　to　synergistic　effects　of　improved　visible　light　absorption,　more　efficient　separation　of　photoexcited　electron-hole　pairs　and　a　specific　charge　transfer　pathway　of　tandem　dual　direct　Z-scheme　configuration　under　light　illumination.　This　work　paves　the　way　for　the　construction　of　direct　Z-scheme　composite　photocatalytic　systems　in　water　splitting.　©　2018　Elsevier　B.V.