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1、NanoscaleResLett(2010)5:1829–1835DOI10.1007/s11671-010-9720-0NANOEXPRESSPreparationofHighlyCrystallineTiO2NanostructuresbyAcid-assistedHydrothermalTreatmentofHexagonal-structuredNanocrystallineTitania/CetyltrimethyammoniumBromideNanoskeletonShuxiDai?YanqiangWu?ToshioSakai
2、?ZuliangDu?HidekiSakai?MasahikoAbeReceived:28May2010/Accepted:26July2010/Publishedonline:11August2010óTheAuthor(s)2010.ThisarticleispublishedwithopenaccessatSpringerlink.comAbstractHighlycrystallineTiO2nanostructureswereKeywordsHydrothermaltreatmentNanocrystallineprepare
3、dthroughafacileinorganicacid-assistedhydro-titaniaNanoskeletonthermaltreatmentofhexagonal-structuredassembliesofnanocrystallinetitianiatemplatedbycetyltrimethylammo-niumbromide(Hex-ncTiO2/CTABNanoskeleton)asstart-Introductioningmaterials.AllsampleswerecharacterizedbyX-ra
4、ydiffraction(XRD)andtransmissionelectronmicroscopyTitaniumoxide(TiO2)isanimportantsemiconductor(TEM).Thein?uenceofhydrochloricacidconcentrationonmaterialforuseinawiderangeofapplications,includingthemorphology,crystallineandtheformationofthenano-photocatalysis,environmenta
5、lpollutioncontrolandsolarstructureswereinvestigated.Wefoundthatthemorphologyenergyconversion[1–4].Itiswellknownthattitaniumandcrystallinephasestronglydependedonthehydrochloricdioxideexistsinthreecrystallinepolymorphs,namelyrutileacidconcentrations.Moreimportantly,crystall
6、inephase(tetragonal),anatase(tetragonal),andbrookite(orthorhom-wascloselyrelatedtothemorphologyofTiO2nanostruc-bic).Rutileisthemoststablephase,whereasanataseandture.Nanoparticleswerepolycrystallineanatasephase,andbrookitearemetastablephaseandtransformtorutileuponalignedna
7、norodsweresinglecrystallinerutilephase.Pos-heating[5,7].TherutilephasehasbeenwidelyusedforsibleformationmechanismsofTiO2nanostructureswithpigmentmaterialsbecauseofitschemicalstability.However,variouscrystallinephasesandmorphologieswereproposed.theanatasephasehasbeenwidely
8、usedinphotodegradationduetoitshighphotoactivity[1,4,6–8].ThemajorityoftheapplicationsofTiO2arest
