It　has　been　demonstrated　that　the　conductivity　and　electrochemical　properties　of　TiO2　nanomaterials　can　be　significantly　improved　by　an　incorporation　of　carbon　additives.　In　the　study,　we　develop　a　novel　N-doped　TiO2　mesoporous　nanostructure　via　the　addition　of　carbon　quantum　dots　(CQDs)　solution　following　a　scalable　hydrothermal　process.　The　as-made　TiO2　product　shows　well-defined　morphology,　high　conductivity,　large　surface　area,　and　abundant　mesopores.　When　evaluated　as　anodes　for　sodium-ion　batteries,　the　CQDs@TiO2　product　annealed　at　500　degrees　C　exhibits　a　superior　sodium　storage　capability.　It　delivers　a　high　reversible　capacity　of　168.8　mAh/g　at　100　mA/g　over　500　cycles　and　long　cycling　stability.　The　remarkable　performance　of　CQDs@TiO2　mainly　arises　from　the　large　surface　area　and　mesoporous　architecture　constructed　by　ultrathin　TiO2　nanosheets,　as　well　as　the　full　cooperation　between　CQDs　and　TiO2.　(C)　2019　Chinese　Chemical　Society　and　Institute　of　Materia　Medica,　Chinese　Academy　of　Medical　Sciences.　Published　by　Elsevier　B.V.　All　rights　reserved.