A structure study of copper oxide for monolayer dispersion of anatase supported-中国期刊网

摘要 ThemonolayerdispersionofcopperoxideonthesurfaceofanataseanditseffectonthepropertieshavebeenstudiedbyX-rayphotoelectronspectroscopy(XPS)andX-rayextendedabsorptionfinestructure(EXAFS).XPSresultsgiveanutmostdispersioncapacityof7.2mg/gTiO2.StronginteractionsbetweencopperoxideandanatasecanbeseenfromEXAFSresults.ThestructureofthesupportedCuOspeciesisstronglydependentontheamountofCuOloading.WhenthecontentofCuOloadingisbelowtheutmostdispersioncapacity,thesurfaceofCuO/TiO2isdominatedbythehighlydispersedCuOspecieshavingno-Cu-O-Cu-chains,Thecopperionislocatedinanoctahedralcoordinationenvironment,andtheCu－O-coordinationdistanceismuchlongerthanthatinpurecrystallineCuO,whenCuOloadingisexceedstheutmostdispersioncapacity,crystallineCuOisformedonthesurfaceofCuO/TiO2,Fromtheresultofthesturcturestudy,itisCu-OoctahedralCoordinationandcoordinationdistancechangeincomparationwithpurecrystallineCuoonthesurfaceCuO/TiO2thathavecatalyticactivity.

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A structure study of copper oxide for monolayer dispersion of anatase supported

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A structure study of copper oxide for monolayer dispersion of anatase supported

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