Preparation of CaAl 2 O 4 :Eu 2+ , Nd 3+ and SrAl 2 O 4 :Eu 2+ , Dy 3+ long afterglow luminescent materials using oil shale ash

Cui, Tingting; Ma, P.; Ye, Sheng; Zheng, Keyan; Zhou, Xiuqing; Xu, Chengyi; Zou, Haifeng; Song, Yanhua

doi:10.1016/j.optmat.2017.03.052

Cited by 30 publications

(12 citation statements)

References 26 publications

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“…These two decay lifetimes represent an initial rapid decay corresponding to the intrinsic lifetime of Eu 2+ followed by the long and slower decay of the afterglow due to the deep trap energy center of codopant Dy 3+ . The multi‐exponential afterglow decay model of this phosphor is fully in agreement with the behavior of a wide variety of rare‐earth‐ion‐doped long‐persistent phosphors …”

Section: Resultssupporting

confidence: 75%

“…The multi-exponential afterglow decay model of this phosphor is fully in agreement with the behavior of a wide variety of rare-earth-ion-doped long-persistent phosphors. [30][31][32] Figure 5 shows an elemental analysis of the 12 nm TiO 2 ALD-coated SA2-Green powders. The EDX spectrum and mapping provide evidence for the presence of the TiO 2 coating on the particle surfaces.…”

Section: Structural and Phosphorescence Analysis Of As-synthesized mentioning

confidence: 99%

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Atomic layer deposition (ALD) of nanoscale coatings on SrAl₂O₄‐based phosphor powders to prevent aqueous degradation

et al. 2020

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The aqueous degradation of Eu2+‐activated and Dy3+‐codoped strontium aluminate (SrAl2O4:Eu2+, Dy3+, SA2‐Green) long afterglow phosphors synthesized from solid‐state reaction and coated with nanoscale metal oxide protective layers (≤12 nm) via atomic layer deposition (ALD) is investigated. Uncoated phosphor powders degrade rapidly upon water immersion and lose their green phosphorescence within 48 hours of water exposure. Postmortem investigations reveal hydration and decomposition of the SrAl2O4 phase. ALD of ~10 nm Al2O3 or ~12 nm TiO2 is found to significantly improve the powder's resistance to aqueous degradation. All ALD‐coated powders show minimal structural and chemical degradation and retain phosphoresence after 48 hours of water immersion. This enhanced durability offers a new pathway for applying long afterglow phosphors to outdoor applications like roadway markings or safety signage and for their incorporation into more eco‐friendly waterborne coatings.

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Section: Resultssupporting

confidence: 75%

Section: Structural and Phosphorescence Analysis Of As-synthesized mentioning

confidence: 99%

Atomic layer deposition (ALD) of nanoscale coatings on SrAl₂O₄‐based phosphor powders to prevent aqueous degradation

et al. 2020

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“…[17][18][19][20] Photoluminescent pigments such as lanthanide-doped strontium aluminium oxide have been used in various applications such as emergency marks and safety clothing. Some long-persistent photoluminescent pigments have been developed to provide different materials of different colours such as Y 2 O 2 S:Mg 2+ ,Ti 4+[ , [21] for red emission, SrAl 2 O 4 :Eu 2+ ,Dy 3+ , [22] for green emission, and CaAl 2 O 4 :Eu 2+ ,Nd 3+ , [23] for blue emission. Strontium aluminium oxide pigments have been the most well known long-persistent photoluminescent materials due to their thermal stability, high chemical stability, nonradioactivity, recyclability, and high quantum efficiency.…”

Section: Introductionmentioning

confidence: 99%

Development of photoluminescent, superhydrophobic, and electrically conductive cotton fibres

et al. 2021

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A simple method for the preparation of multifunctional nanocomposite was developed towards the production of water-repellent, electrically conductive, and photoluminescent film onto cotton fibres. The nanocomposite was composed of lanthanide-doped strontium aluminium oxide and silicon rubber dispersed in petroleum ether. The electrically conductive fabric was woven from nickel strips twisted with cotton filaments as core yarns, which were wrapped with pure cotton yarns. The nanoparticles (NPs) of lanthanide-doped strontium aluminium oxide were mixed with environmentally friendly room-temperature vulcanizing silicon rubber (RTV-SR) dis-

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“…[ 8 ] At this time, different long‐lasting phosphors of different colours have been developed as primary emitters, for example Y 2 O 2 S:Mg 2+ ,Ti 4+ for red emission, [ 9 ] SrAl 2 O 4 :Eu 2+ ,Dy 3+ for greenish emission, [ 10 ] and CaAl 2 O 4 :Eu 2+ ,Nd 3+ for bluish emission. [ 11 ] Those long‐lasting inorganic phosphors have been characterized as having high quantum yield, bright colours, high reversibility, and high thermal, chemical and photostabilities. Long‐lasting rare earth‐doped phosphors are of particular interest.…”

Section: Introductionmentioning

confidence: 99%

Facile production of smart superhydrophobic nanocomposite for wood coating towards long‐lasting glow‐in‐the‐dark photoluminescence

et al. 2021

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A smart photoluminescent nanocomposite surface coating was prepared for simple industrial production of long‐persisting phosphorescence and superhydrophobic wood. The photoluminescent nanocomposite coatings were capable of continuing to emit light in the dark for prolonged time periods that could reach 1.5 h. Lanthanide‐doped aluminium strontium oxide (LASO) nanoparticles at different ratios were immobilized in polystyrene (PS) and developed as a nanocomposite coating for wood substrates. To produce transparency in the prepared nanocomposite coating, LASO was efficiently dispersed in the form of nanoscaled particles to ensure homogeneous dispersion without agglomeration in the PS matrix. The coated wood showed an absorption band at 374 nm and two emission bands at 434 nm and 518 nm. The luminescence spectra showed both long‐persisting phosphorescence as well as photochromic fluorescence relying on the LASO ratio. The improved superhydrophobicity and resistance to scratching of the coated wood could be attributed to the LASO NPs incorporated in the polystyrene matrix. Compared with the uncoated wood substrate, the coated LASO‐PS nanocomposite film also displayed photostability and high durability. The current study demonstrated the potential high‐scale manufacturing of smart wood for some applications such as safety directional signs in buildings, household products, and smart windows.

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Preparation of CaAl 2 O 4 :Eu 2+ , Nd 3+ and SrAl 2 O 4 :Eu 2+ , Dy 3+ long afterglow luminescent materials using oil shale ash

Cited by 30 publications

References 26 publications

Atomic layer deposition (ALD) of nanoscale coatings on SrAl₂O₄‐based phosphor powders to prevent aqueous degradation

Atomic layer deposition (ALD) of nanoscale coatings on SrAl₂O₄‐based phosphor powders to prevent aqueous degradation

Development of photoluminescent, superhydrophobic, and electrically conductive cotton fibres

Facile production of smart superhydrophobic nanocomposite for wood coating towards long‐lasting glow‐in‐the‐dark photoluminescence

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Preparation of CaAl 2 O 4 :Eu 2+ , Nd 3+ and SrAl 2 O 4 :Eu 2+ , Dy 3+ long afterglow luminescent materials using oil shale ash

Cited by 30 publications

References 26 publications

Atomic layer deposition (ALD) of nanoscale coatings on SrAl2O4‐based phosphor powders to prevent aqueous degradation

Atomic layer deposition (ALD) of nanoscale coatings on SrAl2O4‐based phosphor powders to prevent aqueous degradation

Development of photoluminescent, superhydrophobic, and electrically conductive cotton fibres

Facile production of smart superhydrophobic nanocomposite for wood coating towards long‐lasting glow‐in‐the‐dark photoluminescence

Contact Info

Product

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Atomic layer deposition (ALD) of nanoscale coatings on SrAl₂O₄‐based phosphor powders to prevent aqueous degradation

Atomic layer deposition (ALD) of nanoscale coatings on SrAl₂O₄‐based phosphor powders to prevent aqueous degradation