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1、分類號:!!竺密級:——單位代碼:】Q墨§9學(xué)號:唑!!墮!!!!墮10舍肥工學(xué)火警HefeiUniversityofTechnology碩士學(xué)位論文MASTERDISERTATIoNo論文題目:金屬一非金屬共摻雜納米啊o:的制備及其學(xué)位類別:學(xué)科專業(yè):(工程領(lǐng)域作者姓名:導(dǎo)師姓名:完成時(shí)間:PreparationandPhotocatalyticPropertyofSandFeCo-dopedTi02NanoparticlesAbstractTi02’Sphotonutilizationefficiency
2、islowanditcouldbeexcitedonlybyultraviolet(UV)source,SoS/FeandS/ZnCO—dopednanocrystallineTi02photocatalystswerepreparedbyhydrothermalmethodinthispaper.Thecompositionandpropertiesoftheas—preparedTi02powderswerecharacterizedbyXRD,XPS,UV-visDRS,andSOon.Thefacto
3、rsinfluencingCO—dopednanOcrystallincTi02phOtocataIysticpropertieswerediscussed.TheresultsshowedthatS/FeCO-dopedanataseTi02wassynthesizedbyTi(S04)2,F(xiàn)eCl3andthiourea.SulfurwasintheformsofS。andS04。,F(xiàn)ewasintheformsofFe”dopinginthelatticeofTi02.Thephotocatalysts
4、howedexcellentcatalyticactivityunderthevisiblelight.Absorbtioninthevisiblelightdistrictwasenhancedandthebandedgemovedtolongerwavelengthobviously.WhenthemolarratioofFe’+:S:Tiwas0.005:1:1,theanataseTi02一S·Fehydrothermallytreatedat180"Cfor3hexhibitedthehighist
5、photocatalyticperformance.Degradationrateofmethylorangewas32.5%underdaylightirradiationfor2h.S/FeCO·dopedrutileTi02wassynthesizedbyTiCl4,F(xiàn)eCl3andthiourea.ComparedtoTi02,itsbindingenergyatTi2p3/2raisedby2.0eV,showedthatS,F(xiàn)epartlyreplacedthebindingpositionofT
6、i”withoxygen.Absorbtioninvisiblelightdistrictwasobviouslystrengthenedandthecatalysthadthestrongestabsorbtion(b400nm).WhilethemolarratioofFe“:S:Tiwas0.025:1:1,thecatalystpreparedat180℃for2hhadthehighistcatalyticactivity.Degradationrateofmethylorangewas70.9%u
7、nderdaylightirradiationfor4h.S/ZnCO·dopedanataseTi02wassynthesizedbyTi(S04)2,ZnS04andthiourea.ThedopingconcentrationofZnandpHvalueofinitialsolutionaffectedthestructureofS/ZnCO·dopedsample.ZnOwasobtainedwhenthemolarratioofZn:Tiwas1;anataseTi02wasobtainedwhen
8、themolarratioofZn:TiwasJowerthan0.33underacidicconditionwhileunformedTi02wasobtainedunderalkalineconditionandZnOwasnotobserved.Zn“maydisperseduniformityonthesurfaceofTi02intheformsofZnOcluster.Whenthem