Polarized Luminescence Properties of TiO₂:Sm³⁺ Microfibers and Microbelts Prepared by Electrospinning

Abstract

One-dimensional TiO 2 :xSm 3+ microfibers and microbelts were prepared by electrospinning. X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectrometer (EDS), high-resolution transmission electron microscopy (HRTEM), photoluminescence (PL), electron paramagnetic resonance (EPR), and polarized luminescence measurements were performed to characterize these TiO 2 :xSm 3+ microfibers and microbelts. SEM and HRTEM results indicate that TiO 2 :xSm 3+ microfibers calcined at different temperature are belt-like. The average width and thickness of TiO 2 :xSm 3+ microbelts calcined at 700 °C is about 1.0 and 0.4 µm, respectively. Under ultraviolet excitation (λ ex ) 330 nm) and commercial 365 nm UV lamp excitation, these TiO 2 :xSm 3+ microbelts show intense 4 G 5/2 f 6 H 5/2,7/2,9/2 emissions of Sm 3+ ions. Polarized luminescence measurement confirms that the luminescence of single TiO 2 :xSm 3+ microbelt is linear polarization.

Synthesis of uniform TiO2@carbon composite nanofibers as anode for lithium ion batteries with enhanced electrochemical performance

“…For spinning, the set-up was similar to that described previously. 6,27,[29][30][31][32][33] Typically, the collector was placed 9.5 cm from the spinneret to collect the nanofibers. A high voltage of 13.3 kV was applied between the spinneret and the collector by a directcurrent power supply (DW-P303-5ACCD, Tianjin Dongwen High Voltage Power Supply Co., China.).…”

Engineering and optimization of nano- and mesoporous silica fibers using sol–gel and electrospinning techniques for sorption of heavy metal ions

“…Compared with other methods, electrospinning is more productive, cost effective, and less demanding for processing conditions. Various kinds of one-dimensional nano/micromaterials, including fibers [18], belts [19], tubes [20], and core-shell structured fibers [21] have been obtained with this method. Preparation of SiO 2 fiber using the sol-gel method has been investigated by several groups, and mature techniques have been developed [22][23][24].…”

A facile one-pot hydrothermal method to prepare europium-doped titania hollow phosphors and their sensitized luminescence properties

“…Compared with La 3+ [5], Nd 3+ [6], Er 3+ [7], Tb 3+ [8], and Sm 3+ ions [9], Eu 3+ ions have a unique advantage of tremendous applications in phosphors because of their high fluorescent efficiency [10,11].…”