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Abstract
Terpyridine-functionalized Ti nanospike electrodes (TiNS-SiTpy) were developed and applied to cyclic voltammetry and amperometry of Ln (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb) ions and mixed Eu (III) + Ln (III) ions in a 0.1 M NaClO4 electrolyte. Electrodeposition was successfully performed over TiNS-SiTpy electrodes, which were fully examined by scanning electron microscopy, X-ray diffraction crystallography, Fourier-transform infrared spectroscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, photoluminescence (PL), and PL decay kinetics. The Gd and Tb ions were found to increase PL intensities with 10× longer lifetimes of 1.32 μs and 1.03 μs, respectively, compared with that of the electrodeposited Eu sample. The crystal phase and the oxidation states were fully examined for the mixed Ln (Eu + Gd and Eu + Tb) complex structures.
Highlights
Lanthanide (Ln) elements have very usefully appeared in diverse application fields such as display industry, magnets, bio industry, pyroprocessing technology in nuclear power plants, and energy/environment fields [1,2,3,4,5,6,7,8,9,10]
Joo et al have demonstrated electrodeposition of Ln elements on diverse electrodes such as carbon, Ni, and porous Si, and showed that Ln elements were successfully recovered on the electrodes [21,22,23]
For a single Ln element, cyclic voltammetry profiles were obtained at 0.2 V/s over bare TiNS and TiNS-SiTpy electrodes in a 10 mM
Summary
Lanthanide (Ln) elements have very usefully appeared in diverse application fields such as display industry, magnets, bio industry, pyroprocessing technology in nuclear power plants, and energy/environment fields [1,2,3,4,5,6,7,8,9,10]. Synthesized Tb (III) and Eu (III)-organic complex-doped silica nanoparticles with high luminescent properties and embedded in transparent membranes by the electrospinning method for their applications to fluorescent clothing, counterfeiting, and labels [14]. Fan et al synthesized monodispersed α-NaYF4 :RE3+ (RE = Eu, Tb, Ce, Er, and Tm) colloidal spheres and achieved multi-color emissions with orange-red, green, UV emission, bluegreen, and blue depending on the excitation wavelength [17]. They applied the spheres to in vitro cell imaging. Joo et al have demonstrated electrodeposition of Ln elements on diverse electrodes such as carbon, Ni, and porous Si, and showed that Ln elements were successfully recovered on the electrodes [21,22,23]
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