Abstract: In order to improve the photocatalysis efficiency of TiO2, the PVP/TBT composite nanofiber membranes were prepared by electrospinning technology and calcination method based on tetrabutyl titanate (TBT) and polyvinyl pyrrolidone (PVP), and then continuous TiO2 nanofibers were fabricated after calcination. The morphology and structure of TiO2 nanofiber were characterized by SEM, XRD, and TG. The photocatalytic dye degradation performance of TiO2 nanofibers was measured under ultraviolet light with methylene blue as the target degradation material. The results show that the TiO2 nanofibers calcined at 450℃ have good photocatalytic activity. Under the condition that the dye concentration is 20 mg/L and the mass ration of the TiO2 nanofiber and dye is 1:75 in dye solution, the notable degradation rate is 93.31% at 20 min, and 99.83% at 80 min.

Key words: TiO2, electrospinning, nanofibers, photocatalytic

摘要： 为了提高TiO2光催化性能，采用电纺丝技术和煅烧工艺，以钛酸四丁酯（TBT）为钛源、聚乙烯吡咯烷酮（PVP）为高聚物模板，制备PVP/TBT复合纳米纤维膜，再经煅烧得到连续TiO2纳米纤维。通过SEM、XRD、TG测试对材料的形貌、结构进行表征，并在紫外光的照射下，以亚甲基蓝为目标降解物，使用TiO2纳米纤维为光催化剂进行降解实验。结果表明：在450℃下煅烧得到的TiO2纳米纤维具有良好的光催化活性。在染料质量浓度为20 mg/L，TiO2纳米纤维与染料质量比为1∶75的条件下，20 min时的降解率为93.31%，80 min的降解率为99.83%，效果显著。

关键词: TiO2, 静电纺丝, 纳米纤维, 光催化