The　use　of　heterojunctions　with　Z-scheme　photocatalysts　holds　great　promise　for　enhancing　the　photocatalytic　degradation　efficiency　of　antibiotics.　In　this　study,　we　report　the　construction　of　a　novel　heterostructure　by　in-situ　growth　of　the　ultrathin　polymeric　carbon　nitride　(PCN)　on　the　electrospun　Bi2WO6　nanofibers　for　improved　photocatalytic　tetracycline　(TC)　degradation　under　visible　light.　Our　gas–solid　reaction　strategy　enables　the　formation　of　uniform　and　intimate　junctions　between　the　PCN　nanosheets　and　the　Bi2WO6　nanofibers,　resulting　in　a　well-contacted　interface　that　remarkably　accelerates　the　separation　and　transfer　of　the　photogenerated　charge　carriers.　The　optimized　PCN/Bi2WO6　photocatalyst　exhibits　a　significant　TC　degradation　rate　of　89.5　%　under　visible　light,　which　is　1.4-fold　and　2.0-fold　of　the　pure　PCN　and　Bi2WO6　photocatalysts,　respectively.　Our　innovative　design　philosophy　opens　up　a　new　horizon　for　the　development　of　efficient　Z-scheme　heterostructured　photocatalysts　for　antibiotic　degradation.　©　2023　Elsevier　B.V.