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ID:32463135
大小:2.24 MB
页数:88页
时间:2019-02-06
《二氧化钛纳米管的制备及光催化性能研究》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、摘要二氧化钛是一种重要的无机功能材料,Ti02纳米管具有较大的比表面积,在太阳能的储存与利用、光电转换、光致变色及光催化降解大气和水中的污染物等方面有广阔的应用前景。本文研究了用水热法制备TiO。纳米管,并进一步探讨掺杂改性制备Ti0。纳米管,通过X射线衍射仪、紫外一可见分光光度计、透射电镜、紫外可见分光光度计等对纳米管的性能进行了表征。以钛酸四丁酯为前驱体,用熔胶凝胶法制备Ti02纳米粉体。以水热法成功地制备出Ti02纳米管。以金属(w、Fe、Cr,co、Pb、Cu)掺杂的TiQ纳米粉体为前驱体
2、,用水热法合成了金属离子掺杂的Ti02纳米管。借助予X射线衍射(XRD)、透射电镜(TEM)、能谱分析(EDS)、紫外一可见分光光度计等分析方法,研究了Ti如纳米粉体和Ti02纳米管的制备和掺杂,探讨了影响光催化活性的因素。经过形貌分析,Ti02纳米管管径为10.7纳米,管的两端开口,管壁为四层,管的长径比比较高。经实验证明,水热法制备的Ti02纳米管是由粉状经片状,进而卷曲成管状的。纳米管的团聚现象较明显。掺杂金属离子对纳米管的形貌没有影响。降解甲基橙的实验表明:Ti02纳米管具有一定的光催化效
3、果。掺杂W、Fe离子的Ti02纳米管催化能力有所改善;掺杂Pb、Cu光催化能力没有促进;掺杂Cr、Co对光催化能力降低。关键词:二氧化钛纳米管;水热法;掺杂;;光催化降解;甲基橙;£奎三些查兰王兰堡:!兰竺鎏三AbstractTithis∞importantkindofinorganicfunctionalmaterial.Duetoitshighspecificsurfacearea,Ti%haswideapplicationprospectinseveralfieldssuchassolare
4、nergystorageperformancesandutilization,photovoltaicconversion,photochromicandphoto-catalyticdegradationofatmosphefiepollutantandwaterpollutantandsoon.Inthispaper,titaniumdioxidenanotubes(TDN)wassynthesizedbyhydrothermalmethodandthenthepreparationofTDN
5、wasfurtherdiscussed.TheTDNwerecharacterizedbyX-raydiffraction(XRD),UV-Visopticalprope啊analysis(UV-Vis),transmissionelectronmicroscope(TEM),energyspectrumanalysisete..ThenanoparticleTiChwaspreparedwithtetrabutyltitanate(TNB)whiehareformermaterialinthes
6、ol-gelprocess.ThenTDNwassynthesizedbyhydrothermalmethod,sucessfully.ThenanoparticleTie2weredopedbytransitionmetals(w、Fc、Cr、Co、Pb,Cu).UsingdopednanoparticleTi02asormormaterial,theTDNweresynthesizedbyhydrothermalmethod.photo-chemicalcatalysisactiveness.
7、ThroughX-raydiffraction(XRD),transmissionelectronmieroscope(TEM),energydispersiveX—myspectroscopy(EDS),,andUV-Visopticalpropertyanalysis(UV-Vis)methodstothepreparationanddopeofsamples,thefactorsaffectingphotocatalyticactivitywerediscussed.Theresultofm
8、odemtestsshowedthat:particlesizeofTi02isabout10.7nm,open-ends,multilayeredstructure,withhighouterdiameter.TheTDNwhichsynthesizedbyhydrothermalmethodhadclosenano-tubestructurethatismademultiplayergraphitepiece.TheTDNhadobviousclusterandthedoped
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