Mesoporous　TiO2　thin　films　were　prepared　by　using　tetrabutyl　titanate　as　the　inorganic　precursor　and　triblock　copolymer　(Pluronic　F127)　as　the　structure　directing　agent.　The　obtained　mesostructured　TiO2　thin　film　exhibits　a　high　thermal　stability,　which　can　sustain　600　degrees　C　thermal　treatment.　The　small　angle　XRD　and　wide　angle　XRD　patterns　indicate　that　the　samples　have　mesoporous　channel　and　are　composed　of　anatase.　The　corresponding　TEM　images　show　that　the　homogeneous　mesostructure　and　very　thick　pore　walls　(about　9-13　nm)　are　formed　in　the　obtained　thin　films,　which　could　be　responsible　for　the　high　thermal　stability　of　the　framework.　In　addition,　the　samples　have　narrow　pore　diameter　distribution　and　a　mean　pore　size　of　7.4　nm,　(C)　2009　Elsevier　B.V.　All　rights　reserved.