Mesoporous　anatase　Y/TiO2　nanosheets　with　exposed　{116}　facets　have　been　successfully　synthesized　through　a　simple　and　low-cost　solvothermal　method　by　employing　waste　tricolor　fluorescent　powder　as　a　dopant　yttrium　source　and　acetic　acid　as　a　mesopore　creator　as　well　as　HF　as　the　shape　controlling　agent,　followed　by　calcination　at　higher　temperature.　Experimental　results　indicate　that　the　well-ordered　mesoporous　structure　possesses　high　specific　BET　surface　area　(50　m2　g-1)　and　high　total　pore　volumes　(0.37　cm3　g-1).　The　obtained　mesoporous　anatase　Y/TiO　2　nanosheets　exhibit　better　photocatalytic　activity　than　that　of　Degussa　P25　for　degradation　of　Methyl　Orange　(MO)　aqueous　solution　under　UV　light　irradiation.　The　high　specific　surface　area,　conduciveness　to　forming　mesoporous　structures,　yttrium　cation　doping,　and　exposed　high　energy　surfaces　improve　significantly　the　adsorption　and　photoelectron　activity,　making　this　material　attractive　for　various　environmental　and　energy-related　applications.　Copyright　©　2013　MS&T＇13®.