Coaxial electrospinning preparation and properties of magnetic–photoluminescent bifunctional CoFe2O4@Y2O3:Eu3+ coaxial nanofibers

Abstract

CoFe 2 O 4 @Y 2 O 3 :Eu 3? magnetic-fluorescent bifunctional coaxial nanofibers have been successfully obtained via calcination of the [CoFe 2 O 4 /PVP]@ [(Y(NO 3 ) 3 ? Eu(NO 3 ) 3 )/PVP] composite coaxial nanofibers which were fabricated by coaxial electrospinning technique. The diameter of CoFe 2 O 4 @Y 2 O 3 :5 %Eu 3? magnetic-fluorescent bifunctional coaxial nanofibers was 133 ± 17 nm. Strong fluorescence emission peaks of Eu 3?in the CoFe 2 O 4 @Y 2 O 3 :Eu 3? coaxial nanofibers were observed and assigned to 5 D 0 ? 7 F 1 (588 nm), 5 D 0 ? 7 F 1 (593 nm), 5 D 0 ? 7 F 1 (599 nm), 5 D 0 ? 7 F 2 (612 nm) and 5 D 0 ? 7 F 2 (630 nm) energy levels transitions of Eu 3? ions, and the predominant emission peak was located at 612 nm. Compared with CoFe 2 O 4 /Y 2 O 3 :Eu 3? composite nanofibers, CoFe 2 O 4 @Y 2 O 3 :Eu 3? magnetic-fluorescent bifunctional coaxial nanofibers simultaneously provided higher magnetism and fluorescent intensity. The color, photoluminescent intensity and magnetism of the coaxial nanofibers can be tuned via adjusting the diversity and content of fluorescent compounds and the content of magnetic compounds. Formation mechanism of CoFe 2 O 4 @Y 2 O 3 :Eu 3? coaxial nanofibers was also presented. The bifunctional magnetic-photoluminescent CoFe 2 O 4 @ Y 2 O 3 :Eu 3? coaxial nanofibers have potential applications in many fields due to their excellent magnetism and fluorescence.

Luminescent and Magnetic Properties of Fe3O4@SiO2:phen:Eu3+

“…The use of multifunctional materials will, and in some cases already do, allow savings in number of parts, reducing the need for joining operations 9 . Moreover, materials that present both magnetic and luminescent properties have been developed [10][11][12][13][14] and applied to biotechnological processes such as imaging, tracking, and separation of biological molecules or cells [15][16][17][18][19] . One way to obtain both properties in a single multifunctional material is by using the core-shell strategy, which involves coating Fe 3 O 4 nanoparticles with an actively fluorescent material, resulting in a system with magnetic and luminescent properties 16,[20][21][22] .…”

A review on electrospun magnetic nanomaterials: methods, properties and applications

“…In this case, two different spinning solutions are loaded into inner and outer syringes. Each jet flow is then formed with a different velocity and collected before being annealed to obtain magnetic-magnetic, [153][154][155] magneticluminescent 156 or magnetic-electric 48,140,157 bifunctional coreshell nanofibrous materials.…”

“…This is particularly evident in cases that involve the combination of magnetic inorganic constituents and non-magnetic polymers. Typically, M s has a linear correlation with the quantity of magnetic components, 107,156,[196][197][198][199] whilst the addition of nonmagnetic components generally impairs the M s value. [200][201][202] Therefore, the M s values of NFs where polymers are retained are lower than those observed for fibres that consist of pure MNPs.…”

Fabrication of Y2O2S:Eu3+ hollow nanofibers by sulfurization of Y2O3:Eu3+ hollow nanofibers

“…Electrospinning is a simple and effective method to fabricate one-dimensional micro-and nanomaterials, such as nanofibers [26,27], hollow nanofibers [28,29], coreshell structured coaxial nanofibers [30,31] and nanobelts [32,33]. However, to the best of our knowledge, there have been no reports on the preparation of rare earth oxysulfides hollow nanofibers by electrospinning combined with sulfurization technique in the literatures.…”