Recently,　AgX　(X　=　Cl,　Br,　I)　materials　have　been　demonstrated　as　novel　and　efficient　visible-light　photocatalysts　for　the　decomposition　of　various　organic　compounds　and　dyes.　Herein,　heterostructured　Ag@AgCl@AgBr　nanotubes　were　prepared　by　an　anion-exchange　reaction　between　Ag@AgCl　nanotubes　and　Br−　anions,　and　their　photocatalytic　activities　towards　the　decomposition　of　organic　pollutants　were　studied.　The　as-synthesized　photocatalysts　were　characterized　using　X-ray　diffraction　(XRD),　field-emission　scanning　electron　microscopy　(FE–SEM),　high-resolution　transmission　electron　microscopy　combined　with　energy-dispersive　X-ray　spectroscopy　(HR–TEM/EDS),　X-ray　photoelectron　spectroscopy　(XPS),　and　photoluminescence　(PL)　spectroscopy.　The　structure　characterization　studies　confirmed　that　the　photocatalysts　had　nanotubular　morphology.　Compared　to　polyhedral　Ag@AgBr　nanoparticles,　the　incorporation　of　Br−　ions　into　the　Ag@AgCl　framework　remarkably　enhanced　the　photocatalytic　activities.　The　as-prepared　Ag@AgCl@AgBr　nanotubes　can　also　be　reused　due　to　their　high　stability.　Under　visible　light　irradiation,　＞98.5%　of　Rhodamine　B　(RhB)　and　90.3%　of　Red　Acid　I　(RAI)　were　decomposed　within　45　min　using　the　catalyst　AB–2　(Cl−/Br-　=　1:1).　The　catalyst　AB–2　displayed　higher　photocatalytic　activity　due　to　its　enhanced　surface　area　and　photoelectron　transfer,　attributed　to　its　novel　heterostructured　configuration.　©　2018　Elsevier　B.V.