Nitrogen　doped　TiO2　plates　with　dominant　{0　0　1}　facets　were　successfully　synthesized　by　one-pot　hydrothermal　method.　The　dependence　of　microstructure　and　property　evolution,　such　as　crystal　phase,　morphology,　N-doping　and　optical　response　property,　on　the　hydrothermal　time　was　investigated　systematically,　and　their　photocatalytic　activities　for　the　degradation　of　methylene　blue　are　evaluated　under　visible　light　irradiation.　The　results　showed　that　the　structure　of　cubic　TiN　with　the　morphology　of　irregular　bulk　gradually　collapses　to　form　the　structure　of　anatase　TiO2　with　the　morphology　of　well-defined　plate　during　the　hydrothermal　process　with　the　extension　of　hydrothermal　time.　The　bonds　of　TiN　in　TiN　are　gradually　replaced　by　Ti-O-N　and　Ti-O-N　due　to　the　oxidation　effect,　which　realizes　the　N-doping　of　TiO2　plates.　The　as-prepared　N-doped　TiO2　plates　with　dominant　{0　0　1}　facets　demonstrate　photocatalytic　activity　under　visible　light　irradiation　(lambda　＞　420nm),　and　their　photocatalytic　activities　are　decided　by　the　synergistic　effects　of　many　factors,　such　as　crystal　phase,　morphology,　nitrogen　doping,　optical　response,　in　which　morphology　and　nitrogen　doping　are　more　significant　factors　in　comparison　with　crystal　phase　and　optical　response.　(C)　2014　Elsevier　B.V.　All　rights　reserved.