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TGDTA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 TGDTA. XRD analysis indicated that RE/TiO2(RE=Y, Nd) nanofibres with pure anatase
typed phase and pure rutiletyped 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 300
μm. 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.
参考文献
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