Electrospinning Construct And Characterization Of Magnetic-photoluminescent Bifunctional Low-dimensional Composite Nanomaterials

Magnetic ferroferric oxide nanomaterials have wide applications in the fields of magnetic memory, magnetic separation and bioengineering. Rare earth complexs and red-phosphor Y2O3:Eu3+have been extensively used in cathode ray tube (CRT), displays and optical data storage devices. Electrospinning has been proved to be one of the best methods to fabricate one-dimensional nanomaterials owing to its simple operation, high efficiency and reproducibility. Up to now. the study of magnetic-luminescent bifunctional nanomaterials mainly focused on nanoparticles, and no reports on the fabrication of nanofibers and nanobelts through dispersing magnetism-photoluminescence core-shell structured nanoparticles in polymer are found in the references. Hence, fabrication of magnetic-luminescent bifunctional nanofibers and nanobelts via electrospinning remains an important and meaningful subject of study.In this dissertation,[Fe3O4@Y2O3:Eu3+]/PVP composite flexible nanofibers.[Fe3O4@Y2O3:Eu3+]/PMMA nanobelts,[Fe3O4@Y2O3:Eu3+]/Eu(BA)3phen/PVP composite nanofibers and [(Fe3O4@Y2O3:Eu3+)/PVP]@[Eu(BA)3phen/PVP] coaxial nanofibers were fabricated by electrospinning for the first time. The morphologies and properties of the final samples were investigated by XRD, SEM, EDS, TEM. PL and VSM. The results show that all the samples exhibit excellent magnetic-photoluminescent properties. The mean diameter of [Fe3O4@Y2O3:Eu3+]/PVP nanofibers,[Fe3O4@Y2O3:Eu3+]/Eu(BA)3phen/PVP nanofibers and [(Fe3O4@Y2O3:Eu3+)/PVP]@[Eu(BA)3phen/PVP] coaxial nanofibers are about128nm,232nm and375nm, respectively, and the width of [Fe3O4@Y2O3:Eu3+]/PMMA nanobelts is about3-4μm. These findings lay solid foundations for the future study of magnetic-luminescent bifunctional nanomaterials.