Photocatalytic　full　water　splitting　remains　the　perfect　way　to　generate　oxygen　(O2)　and　hydrogen　(H2)　gases　driven　by　sunlight　to　address　the　future　environmental　issues　as　well　as　energy　demands.　Owing　to　its　exceptional　properties,　polymeric　carbon　nitride　(PCN)　has　been　one　of　the　most　widely　investigated　semiconductor　photocatalysts.　Nevertheless,　blank　PCN　characteristically　displays　restrained　photocatalytic　performance　due　to　high-density　defects　in　its　framework　that　may　perhaps　perform　the　part　of　the　recombination　midpoint　for　photoproduced　electron-hole　pairs.　Therefore,　to　overcome　this　problem,　a　simple　approach　to　introduce　7,7,8,8-tetracyanoquinodimethane　(TCNQ)　with　an　electron-withdrawing　characteristic　modifier　into　the　pristine　PCN　framework　by　the　ionothermal　method　to　enhance　its　optical,　conductive,　and　photocatalytic　properties　has　been　undertaken.　Results　show　that　such　integration　of　TCNQ　results　in　the　delocalization　of　the　π-conjugated　structure;　significant　changes　in　its　chemical　electronic　configuration,　band　gap,　and　surface　area;　and　enhanced　production　of　electrons　under　visible　light.　As　a　result　of　this　facile　integration,　our　best　sample　(CNU-TCNQ9.0)　produced　a　hydrogen　evolution　rate　(HER)　of　164.6　μmol　h-1　for　H2　and　an　oxygen　evolution　rate　(OER)　of　14.8　μmol　h-1　for　O2,　which　were　found　to　be　2.4-　and　2.6-fold　greater　than　those　produced　with　pure　carbon　nitride　(CNU)　sample,　respectively.　Hence,　this　work　provides　a　reasonable　alternative　method　to　synthesize　and　design　novel　CNU-TCNQ　backbone　photocatalyst　for　organic　photosynthesis,　CO2　reduction,　hydrogen　evolution,　etc.　Copyright　©　2019　American　Chemical　Society.