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中文摘要：
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.
英文摘要：
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.
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