Electrospinning synthesis of Fe3O4/Eu(DBM)3phen/PVP multifunctional microfibers and their structure, luminescent and magnetic properties

Abstract

Multifunctional Fe 3 O 4 /Eu(DBM) 3 phen/PVP ((DBM: dibenzoylmethane, phen: 1,10-phenanthroline, PVP: polyvinyl pyrrolidone) micro bers were constructed by simple electrospinning process. The structure and morphology of the micro bers were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images. The diameters of pure PVP micro bers and the micro bers doped only with Fe 3 O 4 nanoparticles (NPs) were uniformly distributed, with an average size of about 360 nm. When 3% Eu(DBM) 3 phen complex and Fe 3 O 4 NPs were both added to the precursor for electrospinning, the micro bers became very inhomogeneous in diameter. The photoluminescent properties of pure Eu(DBM) 3 phen complex and composite micro bers were also studied. The characteristic emission peaks of Eu 3+ appeared in the composite micro bers. The intensities of emission and excitation spectra gradually decrease with adding more Fe 3 O 4 NPs. The unit mass of the pure europium complex in some composite micro bers gave stronger luminescence than the pure europium complex. The uorescence lifetime of 5 D 0 state in the composite micro bers is longer than that of pure europium complex. Additionally, the magnetic properties of Fe 3 O 4 NPs and the composite micro bers were investigated. Fe 3 O 4 NPs and composite micro bers were both superparamagnetic. The saturation magnetization of the composite micro bers was smaller than that of pure Fe 3 O 4 NPs.

Electrospinning Preparation, Structure, and Properties of Fe3O4/Tb(acac)3phen/Polystyrene Bifunctional Microfibers

“…The diffraction peaks of Fe 3 O 4 were observed in sample 20Fe40Tb, which indicated that Fe 3 O 4 nanoparticles were doped into the composite microfibers. The XRD pattern of PS microfibers showed no diffraction peaks, indicating that the PS microfibers were amorphous [ 29 ].…”

“…Functional microfibers were prepared by the electrospinning method. The electrospinning process was carried out at room temperature and relative humidity, similar to previous literatures [ 29 , 33 ]. The syringe was placed on a syringe pump and used at a flow rate of 0.6 mL/h −1 .…”

“…This method shows an extensive application in filtration materials, optical fiber humidity sensors, electrode materials of Li-ion batteries, regenerative biology, cosmetics, skin regeneration, battery, filters, light-emitting diodes [ 20 , 26 , 27 , 28 ], and so on. In previous work, some groups have successfully fabricated luminescent–magnetic nanofibers [ 26 , 29 , 30 ] using the electrospinning method. Most of them are Janus structure fibers [ 20 , 24 , 26 ].…”