钇或钕掺杂tio_2纳米纤维的制备及光催化性能研究

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1、第25卷第4期无机材料学报Vol.25,No.42010年4月JournalofInorganicMaterialsApr.,2010文章编号:10002324X(2010)0420379207DOI:10.3724/SP.J.1077.2010.00379钇或钕掺杂TiO2纳米纤维的制备及光催化性能研究王进贤,郭月秋,董相廷,李志国,刘桂霞(长春理工大学化学与环境工程学院,长春130022)摘要:采用静电纺丝技术,以Ti(SO)、聚乙烯吡咯烷酮(PVP,Mr=1300000)、稀土氧化物和N,

2、N2二甲基甲酰胺42(DMF)为原料,成功地制备了TiO2、Y/TiO2和Nd/TiO2纳米纤维.用XRD、FESEM、TEM和TG2DTA等分析手段对样品进行了表征.XRD分析结果表明,当焙烧温度为550℃时得到纯锐钛矿相RE/TiO(RE=Y,Nd)纳米纤维,900℃时得2到纯金红石型RE/TiO2(RE=Y,Nd)纳米纤维,稀土离子显著降低了TiO2的晶格参数.FESEM分析结果表明,RE/TiO(RE=Y,Nd)纳米纤维直径约为50nm、长度>300μm.以罗丹明B和苯酚为目标降解物,研

3、究了三种催化剂的光2催化性能.其中,1.5mol%Y/TiO2光催化剂对罗丹明B的降解效率较高,而1.0mol%Nd/TiO2对苯酚具有较好的降解活性.因此,掺杂不同稀土离子的TiO纳米纤维对不同降解物的降解能力不同.2关键词:静电纺丝技术;TiO2纳米纤维;稀土;罗丹明B;苯酚;光催化中图分类号:TB34;O614文献标识码:A3+3+PreparationandPhotocatalyticActivitiesofYorNd2dopedTiO2NanofibresWANGJin2Xian,GU

4、OYue2Qiu,DONGXiang2Ting,LIZhi2Guo,LIUGui2Xia(SchoolofChemistryandEnvironmentalEngineering,ChangchunUniversityofScienceandTechnology,Changchun130022,China)3+3+Abstract:TiOnanofibres,Y2dopedandNd2dopedTiOnanofibresweresuccessfullyfabricatedby22electros

5、pinningusingTi(SO),polyvinylpyrrolidone(PVP,Mr=1300000),rareearthoxidesanddimeth242ylformamide(DMF)asrawmaterials.ThesampleswerecharacterizedbyXRD,FESEM,TEM,andTG2DTA.XRDanalysisindicatedthatRE/TiO(RE=Y,Nd)nanofibreswithpureanatase2typedphaseand2pure

6、rutile2typedphasewereobtainedbycalcinationoftherelevantcompositefibresat550℃and900℃,re2spectively,andthelatticeparametersofTiOwereremarkablyreducedbythedopingrareearthions.FESEM2analysisrevealedthattheaveragediameteroftheRE/TiO2(RE=Y,Nd)nanofibreswas

7、about50nm,andtheirlengthwasgreaterthan300μm.Photocatalyticpropertiesofthethreenanofibreswereinvestigatedbydeg2radationofrhodamine2Bandphenol.Theresultsshowedthatthedegradationrateof1.5mol%Y/TiO2nanofi2breswashigherforrhodamine2B,whilethedegradationra

8、teof1.0mol%Nd/TiO2nanofibreswashigherforphenol.Therefore,thedegradationactivityofrareearthions2dopedTiO2nanofibreschangedwiththediffer2entdopingrareearthionsanddegradationcompounds.Keywords:electrospinning;TiO2nanofibres;rareearth;rhodamine2B;phenol;