The　splitting　of　water　into　H2and　O2using　solar　energy　is　one　of　the　key　steps　in　artificial　photosynthesis　for　the　future　production　of　renewable　energy.　Here,　we　show　the　first　use　of　CoP　and　Pt　nanoparticles　as　dual　co-catalysts　to　modify　graphitic　carbon　nitride　(g-C3N4)　polymer　to　achieve　overall　water　splitting　under　visible　light　irradiation.　Our　findings　demonstrate　that　loading　dual　co-catalysts　on　delaminated　g-C3N4imparts　surface　redox　sites　on　the　g-C3N4nanosheets　that　can　not　only　promote　catalytic　kinetics　but　also　promote　charge　separation　and　migration　in　the　soft　interface,　thus　improving　the　photocatalytic　efficiency　for　overall　water　splitting.　This　robust,　abundant,　and　stable　photocatalyst　based　on　covalent　organic　frameworks　is　demonstrated　to　hold　great　promise　by　forming　heterojunctions　with　CoP　and　Pt　for　catalyzing　the　direct　splitting　of　water　into　stoichiometric　H2and　O2using　energy　from　photons.　©　2017　Wiley-VCH　Verlag　GmbH　&　Co.　KGaA,　Weinheim