金属-非金属共掺杂纳米tio,2的制备及其光催化性能研究

《金属-非金属共掺杂纳米tio,2的制备及其光催化性能研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、分类号：!!竺密级：——单位代码：】Q墨§9学号：唑!!堕!!!!堕10舍肥工学火警HefeiUniversityofTechnology硕士学位论文MASTERDISERTATIoNo论文题目：金属一非金属共掺杂纳米啊o：的制备及其学位类别：学科专业：(工程领域作者姓名：导师姓名：完成时间：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，FeCl3andthiourea．SulfurwasintheformsofS。andS04。，FewasintheformsofFe”dopinginthelatticeofTi02．Thephotocatalysts

4、howedexcellentcatalyticactivityunderthevisiblelight．Absorbtioninthevisiblelightdistrictwasenhancedandthebandedgemovedtolongerwavelengthobviously．WhenthemolarratioofFe’+：S：Tiwas0．005：1：1，theanataseTi02一S·Fehydrothermallytreatedat180"Cfor3hexhibitedthehighist

5、photocatalyticperformance．Degradationrateofmethylorangewas32．5％underdaylightirradiationfor2h．S／FeCO·dopedrutileTi02wassynthesizedbyTiCl4，FeCl3andthiourea．ComparedtoTi02，itsbindingenergyatTi2p3／2raisedby2．0eV，showedthatS，FepartlyreplacedthebindingpositionofT

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