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1、静电纺丝论文:光催化分解水制氢用低维TiO_2纳米材料的制备【中文摘要】目前人类面临着严峻的能源问题,随着煤炭、石油等能源的趋于枯竭,寻找一个新的代替能源已逐渐受到世界各国研究者的重视,氢能则被认为是这样一个新型绿色替代能源。半导体光催化分解水制氢是将太阳能转换为氢能的一种最环保方法。与其它半导体相比,Ti02具有很多优点,是一种新型的半导体光催化剂,在光催化分解水制氢方面的应用具有广阔前景。静电纺丝技术是一种简单且易操作的能连续制备低维纳米材料的方法,因此利用静电纺丝法制备出Ti02低维纳米材料,并用
2、于光催化分解水制氢,近年来已成为研究热点。本文中采用静电纺丝技术制备出低维Ti02纳米材料,包括纳米纤维、多孔空心纳米纤维和纳米带,同时采用静电纺丝技术制备出TiO2/Au和TiO2:Fe3+纳米纤维;采用TG-DTA,FTIR,XRD,FESEM,EDS等分析测试手段对所制备的样品进行了系统地表征。结果表明,纳米纤维的直径为50-200nm;多孔空心纳米纤维的直径为150-400nm;纳米带的宽度为2-14gm,厚度为90-220nm;TiO2/Au纳米纤维的直径为50~180nm;TiO2:Fe3+
3、内米纤维的直径为80-200nm。【英文摘要】Presently,mankindisfacedwithsevereshortageofenergy,solookingforanewalternativeenergysourcehasattractedmoreandmoreattentionofresearchersaroundtheworldwiththedepletionofthecoalandoil.Hydrogenisthoughtofasanewgreenalternativeenergysou
4、rce.Hydrogenproducedbythesemiconductorphotocatalyticdecompositionofwaterisoneofthemostenvironmentfriendlymethod.Comparedwiththeothersemiconductors,TiO2hasmanyadvantages,anditisanewtypesemiconductorphotocatalystandhasbroadapplicationprospectsinphotocataly
5、ticdecompositionofwater.Electrospinningisasimpleandeasytooperatemethod,anditcancontinuouslypreparelow-dimensionalmaterials.Sofabricationoflow-dimensionaltitaniumdioxidenano-materialsbyelectrospinningandhydrogenproducedbytheirphotocatalyticdecompositionof
6、waterhavebecomeapopularresearchsubjectinrecentyears.Inthedissertation,low-dimensionalTiO2nanomaterialswerefabricatedviaelectrospinning,includingnanofibers.porousandhollownanofibersandnanobelts.TiO2/AuandTiO2:Fe3+nanofiberswerealsofabricatedviaelectrospin
7、ning.ThesamplesweresystematicallycharacterizedbyTG-DTA,FTIR,XRD.FESEMandEDS.Theresultsshowthatthediameterofthepreparedcompositenanofibersrangedfrom50nmto200nm,thediameterofthepreparedcompositeporousandhollownanofibersrangedfrom150nmto400nm,thewidthofthep
8、reparedcompositenanobeltsrangedfrom2μmto14μm,andthethicknessofthepreparedcompositenanobeltsrangedfrom90nmto220nm,thediameterofTiO2/AuandTiO2:Fe3+nanofibersrangedfrom50nmto180nmand80nmto200nmrespectively.【关键词】静电纺丝低维纳米材料TiO2