Functionalized　mesoporous　TiO2　molecular　sieves　were　prepared　by　treating　ordered　mesoporous　TiO2　with　phosphoric　acid　or　ammonium　sulfate　at　high　temperature.　The　samples　were　characterized　by　X-ray　diffraction　(XRD),　transmission　electron　microscopy　(TEM),　N-2　adsorption-desorption　measurement,　X-ray　photoelectron　spectroscopy　(XPS),　and　Fourier　transform　infrared　spectrometer　(FT-IR).　The　photocatalytic　activity　of　the　samples　was　evaluated　by　photocatalytic　decomposition　of　bromomethane　(CH3Br)　in　air.　Results　revealed　that　the　functionalized　TiO2　samples　preserved　ordered　mesostructure　and　exhibited　enhanced　physicochemical　properties.　The　photocatalytic　activity　of　the　functionalized　mesoporous　TiO2　sample　was　about　three　times　higher　than　that　of　the　pure　mesoporous　TiO2.　The　concentrations　of　phosphoric　acid　and　ammonium　sulfate　solutions　used　for　the　functionalization　of　TiO2　greatly　influenced　the　photocatalytic　activity　of　the　resultants　materials.　The　optimal　concentrations　of　phosphoric　acid　and　ammonium　sulfate　solutions　were　0.05　and　0.10　M,　respectively.　The　enhanced　photocatalytic　performance　of　the　functionalized　mesoporous　TiO2　could　be　attributed　to　large　specific　surface　area,　high　hydroxyl　density,　and　enhanced　surface　chemical　state.　(C)　2007　Elsevier　Inc.　All　rights　reserved.