A　novel　mesoporous　anatase　yttrium-doped　TiO2　nanosheet-array　film　was　prepared　via　a　low-cost,　facile　and　template-free　solvothermal　method　by　employing　Waste　Tricolor　Fluorescent　Powder　(WTFP)　as　a　dopant　yttrium　source　and　acetic　acid　as　a　mesopore　creator.　The　as-prepared　Y-TiO2　film　exhibited　large　specific　surface　area,　high　pore　volume　and　high　temperature　anatase　phase　stability.　The　significant　increase　of　photocatalytic　activity　was　confirmed　by　the　degradation　of　Methyl　Orange　(MO)　aqueous　solution　under　simulated　solar　light　irradiation.　The　large　enhancement　of　photocatalytic　activity　could　be　due　to　the　synergistic　effect　of　Y-doping　and　high　specific　surface　area　as　well　as　the　developed　mesoporous　structure.