【摘要】 以聚乙烯吡咯烷酮、钛酸丁酯和Fe3O4@SiO2为前驱物,将静电纺丝技术和高温煅烧法相结合,成功地制备出内含Fe3O4@SiO2纳米粒子的磁性TiO2纳米纤维.利用XRD、SEM、TEM、UV-Vis光谱及Shole7304型振动样品磁强计等测试手段对样品的结构和形貌及磁性进行表征,在光催化实验中选罗丹明B为降解模拟污染物测试了太阳光照射下的光催化活性.实验结果表明:所制备的磁性TiO2纳米纤维在模拟太阳光光照下表现出较好的光催化活性.另外,该纤维在外加磁场下能够简单有效地分离回收.更多还原

【Abstract】 The magnetic TiO2 nanofibers with well-dispersed Fe3O4@TiO2 nanoparticles have been prepared by electrospinning technique in which PVP, Ti(Oi Pr)4and different quantities Fe3O4@SiO2 were used as precusors. XRD, SEM,TEM, Uv-vis spectrums were used to characterize and analyze the structure and morphology and sample magnetic properties were tested by shole 7304 magnetometer. The photocatalytic activity was determined under ultraviolet light irradiation by using Rh B degration as model reaction. The results show that the as-prepared samples were anatases and Fe3O4@SiO2 were distributed in the TiO2 nanofibers averagely. The Uv-vis spectrum indicate that TiO2 photocatalytic activity apparently enhanced and the adsorption range was shifted to the infrared region. The as-prepared samples with strong magnetism can be separated and rewarded by adding the magnetic field. The photocatalytic activity of Rh B degradation for the samples under ultraviolet light irradiation was improved significantly.更多还原