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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   

  1. 长春理工大学 化学与环境工程学院, 长春 130022

  • 收稿日期:2009-08-10 修回日期:2009-11-17 出版日期:2010-04-20 网络出版日期:2010-04-27

Preparation and Photocatalytic Activities of Y3+ or Nd3+doped TiO2 Nanofibres

WANG Jin-Xian, GUO Yue-Qiu, DONG Xiang-Ting, LI Zhi-Guo, LIU Gui-Xia

  

  1. School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China
  • Received:2009-08-10 Revised:2009-11-17 Published:2010-04-20 Online:2010-04-27

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.

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

Abstract: 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 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.

Key words: electrospinning, TiO2 nanofibres, rare earth, rhodamineB, phenol, photocatalysis

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