摘要:
本文采用溶胶–凝胶静电纺丝技术获得了直径均匀，长度连续的正交钙钛矿结构BNdT纳米纤维。通过TG/DTA、XRD、SEM和TEM表征手段，研究了退火温度对样品的结晶过程、晶体结构和纤维形貌的影响。通过对电滞回线的观察，显示了BIT和BNdT纳米纤维的铁电性能。结果显示，适量的Nd离子掺杂能有效改善BIT的铁电性能，并对这一机理进行了分析。最后，研究了不同Nd掺杂量的BNdT (x = 0, 0.25, 0.75, 1.5)纳米纤维降解RhB的光催化性能。结果显示，随着Nd掺杂量的增加，RhB的降解速率增大。
Abstract:
BNdT nanofibers with uniform diameter and length continuity were fabricated through sol-gel electrospinning process. The effects of annealing temperature on the crystallization, morphology and phase of the products were investigated by using TG/DTA, XRD, SEM and TEM characterization. The results show that the annealed nanofibers are orthorhombic perovskite structured BNdT materials. The ferroelectric hysteresis loops of the samples BIT and BNdT indicated that a certain amount of Nd doping was conducive to enhance ferroelectric properties. Finally, the photocatalytic properties of BNdT nanofibers with different content of Nd (x = 0, 0.25, 0.75, 1.5) were observed by the degradation of RhB aqueous solution. The degradation reactive rate was accelerated with the increase of Nd content.