Many　recent　advances　in　creating　heterostructures　based　on　2D　materials　have　opened　new　possibilities　in　catalysis.　This　study　prepared　a　new　2D　hybrid　photocatalyst　(CBN-x)　consisting　of　CN　and　h-BN　using　low-cost　precursors　(urea　and　boric　acid).　The　effects　of　CN　loading　on　the　structure,　surface　chemistry　and　photocatalytic　activities　were　systematically　investigated.　The　photocatalytic　activities　of　CBN-x　samples　were　tested　for　the　production　of　H2　and　H2O2,　which　demonstrated　markedly　enhanced　activities　without　the　need　of　noble　metal　co-catalysts.　However,　CBN-x　activities　for　the　photocatalytic　oxidation　of　organic　compound　were　not　better　than　that　of　h-BN.　Loading　CN　on　h-BN　sheets,　C　2p　and　N　2p　orbitals　from　CN　introduce　new　valence　and　conduction　band　edges,　which　gradually　narrowed　the　bandgap　and　enhanced　light　absorption　efficiency　of　the　hybrid　photocatalysts.　In　such　metal-free　systems,　electrons　generated　in　CN　transfer　to　h-BN,　while　photogenerated　holes　on　h-BN　transfer　to　CN,　which　enhances　the　charge　separation　through　the　heterojunction　interface　(CN/BN).　Therefore,　increasing　the　CN　loading　enhances　the　overall　efficiency　of　photocatalysis　until　excessive　loading　of　CN　covers　the　active　sites　on　h-BN.　©　2017　Elsevier　Ltd