Tunable Blue Emission from Ta⁵⁺ Doped Sulfophosphate Glass‐Ceramics

Abstract

In this article, Ta 5+ ion doped P 2 O 5 -ZnO-ZnSO 4 -Na 2 O glasses were prepared. Luminescence properties of Ta 5+ doped sulfophosphate glass-ceramics were studied. A broad blue emission band of Ta 5+ doped sulfaphosphate glass excited by 254 nm Ultraviolet (UV) light was observed at the range 350-600 nm. After thermal treatment, the luminescence intensity of Ta 5+ doped glass-ceramic was significantly enhanced by over 400%. More importantly, the luminescence intensity could be fine-tuned by controlling the matrix crystallinity surrounding the Ta 5+ cations, which was achieved via a facile heat treatment. Compared with the glass samples, the decay life of Ta 5+ doped glass-ceramics became shorter and two different decay times were calculated based on a second-order exponential decay model. This indicates that Ta 5+ cations properly exist around NaZnPO 4 crystallite in the residual glass phase.

Ta2O5 nanocrystals strengthened linear, nonlinear, and Faraday properties of heavy metal oxide diamagnetic material

“…The octahedral coordinated and other octahedral coordinated TM ions, for example, MoO 6 , WO 6 , and TiO 6 , are known as rather efficiently luminescent centers through metal‐to‐ligand transition 13 . Furthermore, the complex is a kind of self‐luminescent center, in which blue emission can be ascribed to the transition between Nb4 d and O2 p orbitals 42 . Therefore, considering the similarities in coordination and electron configuration between and , an electron in O2 p orbital is excited to Ta 5 d 0 by absorbing UV photon and then thermally relaxed to the lowest vibrational state of Ta 5 d 0 energy level.…”

“…13 Furthermore, the NbO 3 − 4 complex is a kind of self-luminescent center, in which blue emission can be ascribed to the transition between Nb4d and O2p orbitals. 42 Therefore, considering the similarities in coordination and electron configuration between TaO 7 − 6 and NbO 3 − 4 , an electron in O2p orbital is excited to Ta 5d 0 by absorbing UV photon and then thermally relaxed to the lowest vibrational state of Ta 5d 0 energy level. Finally, the excited electron relaxes to the valence band accompanied by emission of a blue wavelength photon at 420 nm.…”

“…[7][8][9]40,41 The chemical and volume changes that accompany ceramization of the polymer during pyrolysis have been documented in several studies. For example, see Refs [39][40][41][42]. Pyrolysis of polycarbosilane polymer has been modeled by Key et al 43 Ideally, the available individual models for polymer infiltration and pyrolysis should be combined to construct a model for the PIP process.…”

Self‐Co‐Electrolysis for Co‐Production of Phosphate and Hydrogen in Neutral Phosphate Buffer Electrolyte

“…Therefore, NaZnPO 4 , which is usually synthesized using a hazardous hydrothermal method or solid‐state reaction, can be synthesized under milder conditions and can be obtained concurrently while using the N,Cu‐CoP/CC catalyst in this system. [ 12 ] NaZnPO 4 is used in heat‐reflective materials, Ni–Zn battery anodic materials, and light‐emitting diodes. In this study, an SCES was assembled using Zn and N,Cu‐CoP/CC as the anode and cathode, respectively.…”