Magnetically Recoverable PEI/Titanate@Fe3O4 Photocatalysts: Fabrication and Photocatalytic Properties
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2018年第6期
论文作者：孙东亚 HE Liwen LIAN Jiqiong XIE An LIN Bizhou
文章页码：1387 - 1394
摘 要：The magnetically separable ternary polyetherimide/titanate@Fe3 O4（PTF） photocatalysts of special heterostructure between magnetite（Fe3 O4） microspheres and titanates nanosheets modified by polyetherimide（PEI） were successfully fabricated via a simple facile hydrothermal deposition method. The as-prepared photocatalysts were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, Transmission electron microscopy and UV-vis diffuse reflectance spectroscopy etc. The results showed that the as-fabricated material had a structure of Fe3 O4 microspheres coated with titanates nanosheets modified by PEI. The special interfacial contact between 3 D microsphere and 2 D nanosheets in the nanoarchitectures was formed via electrostatic attraction. Furthermore, the resulted photocatalysts were tested by degradation reaction of methylene blue under visible light irradiation and demonstrated an enhanced performance than the pure Fe3 O4 microspheres, and the photocatalytic activity enhanced with the molar ratio of Fe3 O4 microspheres and modified titanate gradually, which was attributed to the expansion of the surface area and the different electrostatic contact between the Fe3 O4 microspheres and titanate nanosheets. Moreover, the obtained results revealed the high yield magnetic separation and efficient reusability of PTF-5（96.7%） over 3 times reuse.
孙东亚1,2，HE Liwen1,2，LIAN Jiqiong1，XIE An1，LIN Bizhou2
1. Key Laboratory of Functional Materials and Applications of Fujian Province, College of Materials Science and Engineering, Xiamen University of Technology2. Fujian Key Laboratory of Photoelectric Functional Materials, Huaqiao University
摘 要：The magnetically separable ternary polyetherimide/titanate@Fe3 O4（PTF） photocatalysts of special heterostructure between magnetite（Fe3 O4） microspheres and titanates nanosheets modified by polyetherimide（PEI） were successfully fabricated via a simple facile hydrothermal deposition method. The as-prepared photocatalysts were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, Transmission electron microscopy and UV-vis diffuse reflectance spectroscopy etc. The results showed that the as-fabricated material had a structure of Fe3 O4 microspheres coated with titanates nanosheets modified by PEI. The special interfacial contact between 3 D microsphere and 2 D nanosheets in the nanoarchitectures was formed via electrostatic attraction. Furthermore, the resulted photocatalysts were tested by degradation reaction of methylene blue under visible light irradiation and demonstrated an enhanced performance than the pure Fe3 O4 microspheres, and the photocatalytic activity enhanced with the molar ratio of Fe3 O4 microspheres and modified titanate gradually, which was attributed to the expansion of the surface area and the different electrostatic contact between the Fe3 O4 microspheres and titanate nanosheets. Moreover, the obtained results revealed the high yield magnetic separation and efficient reusability of PTF-5（96.7%） over 3 times reuse.
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