钇或钕掺杂TiO_2纳米纤维的制备及光催化性能研究  

Preparation and Photocatalytic Activities of Y^(3+) or Nd^(3+)-doped TiO_2 Nanofibres

作　　者：王进贤[1] 郭月秋[1] 董相廷[1] 李志国[1] 刘桂霞[1] 

机构地区：[1]长春理工大学化学与环境工程学院,长春130022

出　　处：《无机材料学报》2010年第4期379-385,共7页Journal of Inorganic Materials

基　　金：吉林省科技发展计划重大项目(20070402;20060504);教育部科学技术研究重点项目(207026);长春市科技计划项目(2007045);吉林省教育厅"十一五"科学技术研究项目(2007-45;2006JYT05);吉林省环保局科技项目(2006-24)

摘　　要：采用静电纺丝技术,以Ti(SO4)2、聚乙烯吡咯烷酮(PVP,Mr=1300000)、稀土氧化物和N,N-二甲基甲酰胺(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TG-DTA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/TiO2(RE=Y,Nd)纳米纤维,900℃时得到纯金红石型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/TiO2(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,研究了三种催化剂的光催化性能.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TiO2纳米纤维对不同降解物的降解能力不同.TiO2 nanofibres,Y3＋-doped and Nd3＋-doped TiO2 nanofibres were successfully fabricated by electrospinning using Ti（SO4）2,polyvinyl pyrrolidone（PVP,Mr=1300000）,rare earth oxides and dimethyl formamide（DMF） as raw materials.The samples were characterized by XRD,FESEM,TEM,and TG-DTA.XRD analysis indicated that RE/TiO2（RE=Y,Nd） nanofibres with pure anatase-typed phase and pure rutile-typed phase were obtained by calcination of the relevant composite fibres at 550℃ and 900℃,respectively,and the lattice parameters of TiO2 were remarkably reduced by the doping rare earth ions.FESEM analysis revealed that the average diameter of the RE/TiO2（RE=Y,Nd） nanofibres was about 50nm,and their length was greater than 300μm.Photocatalytic properties of the three nanofibres were investigated by degradation of rhodamine-B and phenol.The results showed that the degradation rate of 1.5mol%Y/TiO2 nanofibres was higher for rhodamine-B,while the degradation rate of 1.0mol%Nd/TiO2 nanofibres was higher for phenol.Therefore,the degradation activity of rare earth ions-doped TiO2 nanofibres changed with the different doping rare earth ions and degradation compounds.

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 

分 类 号：TB34[一般工业技术—材料科学与工程] O614[理学—无机化学]