CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 23
·40683-40691
·
IF 5.6
Baosheng Cao,Qianrui Liu,Lulu Qiu,Yujie Weng,Yangyang He,Xiaoguang Han,Bin Dong
Dy 3+ -doped luminescent materials have a promising application in various optical and optoelectronic fields. The unveiling of detailed energy level distribution and subtle emission transition of Dy 3+ in oxide matrices is vital for developing new optical sensors . In this study, the crystallographic site symmetry of Dy 3+ in CaWO 4 :Dy 3+ phosphors prepared via the co-precipitation method was identified by the XRD , FT-IR, and Raman spectroscopy . The spectroscopic site of the S 4 symmetry of Dy 3+ in CaWO 4 crystals was confirmed using Eu 3+ as the structural probe through high-resolution, low-temperature photoluminescence spectroscopy. The detailed crystal-filed (CF) energy level arrangement and corresponding emission transition lines of Dy 3+ were revealed through the spectral well-resolving and temperature-dependent PL spectra . Furthermore, a new ratiometric thermometric strategy based on the two opposite thermal-dependent CF transitions exhibited excellent sensitivity to a wide temperature range from 80 to 700 K. In addition, a novel barcode anti-counterfeiting applicability has been certified to realize dynamic information encryption . This study provides insight into the development of new Dy 3+ -based phosphors and the exploration of CaWO 4 :Dy 3+ phosphors in advanced luminescent thermometers and anti-counterfeiting under extreme temperature conditions.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Shu-Juan Zhao,Yu-Chen Ao,Zhengxiang Cai,Qi-Hua Yang,Pei Tang,Han-Qi Wei,Yayun Zhou,Puxian Xiong,Ge-Mei Cai
Flexible mechanoluminescent (ML) composite elastomers hold great promise for intelligent health monitoring, safety warning, and human-machine interaction. Yet, their practical adoption is hampered by the prevalent reliance of most current materials on pre-irradiation sources such as ultraviolet light or X-rays, which fundamentally limits operational convenience. Herein, we leverage the outstanding ion-incorporation capacity of borates to develop a new class of high-performance ML materials that require no pre-irradiation. Flexible composite films based on LaBO 3 :Re 3+ Re = Sm, Eu, Tb, Dy, Tm) display stimulus-responsive ML across the visible spectrum (400–800 nm) under diverse mechanical stimuli. Crucially, the films based on LaBO 3 :Tb 3+ exhibit good cyclic stability and a self-recovering ML property, where the intensity recovers to 88.7% of its original intensity after 12 h. Mechanistic investigations attribute the ML emission to electron bombardment on activator ions, induced by interfacial triboelectric effects. The practical viability potential of this material system further demonstrates by fabricating self-powered light source of bicycle sharing and multimodal anticounterfeiting devices. These findings confirm borates as suitable carriers for high-performance ML and offer a novel material platform for designing intelligent optical devices.
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ACS Applied Engineering Materials
·
2026
·
IF 3.5
Meng Zhang,Shuangxiang Li,Bin Can,Zhenhui Li,Yangda Hou,Qingche He,Yongyun Mao
Achieving both efficient mechanical energy harvesting and all-night passive luminescence in a single flexible film remains a critical challenge for self-powered smart road systems. In this work, a poly(vinylidene fluoride)/SrAl2O4:Eu2+,Dy3+ (PVDF/SAOED) composite film is fabricated by tape-casting, which integrates triboelectric nanogeneration and ultralong persistent luminescence into one flexible unit─a combination that, to the best of our knowledge, has not been previously reported for all-night passive road marking applications with both liquid–solid and solid–solid energy harvesting modes. To overcome the moisture sensitivity and poor polymer compatibility of SAOED phosphors, a silicone-resin surface coating strategy is adopted. At the optimized coating ratio, the crystal structure is well preserved, the afterglow decay to 1.36 mcd/m2 exceeds 15 h, and the luminescence loss is below 10%. A liquid–solid triboelectric nanogenerator (TENG) based on this film delivers 150 nA and 1.8 V under water droplet impact, adapting well to varying rainfall intensities. A solid–solid TENG operating at 1 Hz produces a stable voltage of about 11 V and lights up over 40 LEDs. After UV excitation, the film emits bright blue-green light with CIE coordinates nearly identical to the neat phosphor, enabling “daytime storage, nighttime glow” while harvesting energy from raindrops and footsteps. Through this coating strategy, the interfacial compatibility and luminescence retention are synergistically enhanced, and the influence of PVDF content on dielectric, mechanical, and triboelectric properties is systematically revealed. This work provides a material platform for maintenance-free, all-weather, visually interactive self-powered road marking and smart traffic facilities.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Ying Li,He Li,Guangjun Yang,Xiwei Qi
A series of La 2 O 3 -Ga 2 O 3 -0.08Eu 2 O 3 - x Dy 2 O 3 amorphous samples ( x = 0–0.14, interval of 0.01) were synthesized via containerless solidification. XRD results demonstrated that the prepared materials possessed an amorphous structure with a broad diffraction hump instead of sharp crystalline peaks. Differential thermal analysis (DTA) revealed that Dy 2 O 3 doping barely altered the glass transition temperature ( T g ) but significantly increased thermal stability and crystallization characteristic temperature ( T x ) and thermal stability parameter Δ T ( T x - T g ), with the maximum Δ T reaching ∼96 °C at x = 0.09. Concentration quenching of Dy 3+ was dominated by multipolar interaction, confirmed by a critical distance ( R c ) of 18.98 Å and Dexter theory analysis. The optical band gap ( E opt ) remained ∼3.72 eV at x ≤ 0.06 and decreased to ∼3.42 eV at x = 0.11. CIE standard 1931 chromaticity coordinate values together with correlated color temperature (CCT) were tunable, with emission color evolving from warm reddish-orange to orange-yellow (CCT: 2250–3240 K). The excellent thermal stability, tunable PL, and tunable CCT render these amorphous materials promising candidates for solid-state luminescent devices.
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ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 30
·41245-41258
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IF 7.8
Zhang Xiangyu,Hu Yuanyuan,Xu Chunlong,Cheng Lin,Gao Dangli
Rational design of Eu 2+ -activated red phosphors under visible light excitation remains a critical challenge in various fields such as photonics, optoelectronics, and white-light-emitting diodes. Herein, we engineer high density traps with a double metastable state in the SrZnOS matrix by constructing the reversible infinitesimal photoelectrochemical layered micro-unit battery structure via co-doping Eu 2+ and Dy 3+ ions for achieving robust red luminescence. The resulting SrZnOS:Eu 2+ ,Dy 3+ phosphor exhibits intense red photoluminescence at 620 nm under 468 nm excitation, matching the emission intensity of commercial SrAl 2 O 4 :Eu 2+ ,Dy 3+ under UV irradiation. Notably, this material exhibits multi-modal luminescence, encompassing red persistent luminescence along with tunable photo/thermo/mechano-stimulated luminescence. These properties make SrZnOS:Eu 2+ ,Dy 3+ highly promising for applications in secure information storage and advanced displays. Our work establishes a design principle for manipulating multi-mode luminescence in oxide hosts through photoelectrochemical cell engineering, opening avenues for next-generation functional materials.
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PubMed
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Shan Tang,Jiumei He,Chengcheng Wan,Li Jiang,Qianchun Zhang
This study addresses the urgent demand for simple and sensitive online gas monitoring technologies in the field of environmental safety by developing a high-performance cataluminescence (CTL) sensor based on oxygen-vacancy-rich microporous titanium dioxide (Ovm-TiO 2 ) for detecting trace isobutyraldehyde (IBL). The Ovm-TiO 2 material, synthesized via a two-step heating process combined with a KBH 4 treatment, features abundant oxygen vacancy defects on its surface, which are pivotal to enhancing sensor performance. Density functional theory (DFT) calculations unravel the surface-mediated mechanism, the oxygen vacancies serve as active sites, drastically enhancing the chemical adsorption and activation of O 2 on the Ovm-TiO 2 surface, which is the key to boosting the cataluminescence efficiency. The developed sensor exhibits outstanding detection performance for IBL, with a wide linear range (0.0100–5.00 mg/L, R 2 = 0.9997), a low detection limit (3 μg/L), and achieved recovery rates of 87.6%–107% with good reproducibility (relative standard deviation, RSD: 5.3%–9.0%) in practical sample analysis. This work not only provides a viable online monitoring solution for IBL but also elucidates the CTL enhancement mechanism at the atomic level, offering important theoretical foundations and practical insights for designing highly sensitive gas sensors.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Wenzhao Wei,Chen Yang,Donggang Wang,Haibin Sun,Xue Guo,Qiangqiang Hu,Yurun Feng
Low-entropy BaZr 0 . 1 Ce 0 . 9 O 3-δ ( Δ S c o n f = 0.33 R) was used as the matrix to design and construct a series of medium-entropy electrolyte systems - BaZr 0 . 1 Sn 0 . 1 Ce 0 . 6 X 0 . 2 O 3-δ ( Δ S c o n f = 1.09 R)-via co-doping with Sn 4+ and rare-earth ions (X = Dy, Nd, Yb, Y). By combining experimental characterizations with first-principles calculations (DFT), the effects of different rare-earth dopants on the phase structure, chemical stability, and electrochemical performance of these electrolytes were systematically investigated. Among electrolytes, BaZr 0 . 1 Sn 0 . 1 Ce 0 . 6 Nd 0 . 2 O 3-δ (BZSCN) shows the most stable phase composition and microstructure after 3 h of boiling H 2 O treatment and 3 h of CO 2 treatment at 700 °C. It exhibits high conductivity (3.19 × 10 −2 S cm −1 ) in humid air at 700 °C, with relatively stable conductivities after H 2 O (1.80 × 10 −2 S cm −1 ) and CO 2 (2.49 × 10 −2 S cm −1 ) treatments under the same condition. According to the first-principles calculation, compared with other BaZr 0.1 Sn 0.1 Ce 0.6 X 0.2 O 3−δ (X = Dy, Yb, Y) electrolytes, BZSCN electrolyte exhibits elevated reaction energy barriers for H 2 O (5.12 eV) and CO 2 (0.28 eV), alongside reduced adsorption energies for H 2 O (−0.508 eV) and CO 2 (0.054 eV), collectively underpinning its enhanced chemical stability. BZSCN-based anode-supported cell demonstrates a maximum power output of 0.64 W cm −2 at 700 °C when operated with humidified H 2 .
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PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Xiaoxiao Zheng,Ming Lei,Miaomiao Yang,Hongjie Wu,Jipeng Chen,Fengcai Lin,Donghui Wang,Guocai Zheng,Yanlian Xu,Qi Lin
To address the dual challenges of traditional rare-earth luminescent materials (poor moisture resistance, aging stability) and conventional coatings (environmental hazards, insufficient corrosion protection) for industrial applications, a novel waterborne composite coating with persistent luminescence and excellent anticorrosion performance was developed. Using APSA-UTPCZrP (AUZ), a surface-modified 2D layered nanomodifier validated in previous work to enhance anticorrosion while retaining waterborne polyurethane (WPU)’s environmental friendliness; urushiol titanium polymer (UTP), strontium magnesium silicate (Mss) and strontium aluminate (As) phosphors were efficiently dispersed in WPU via amphiphilic sodium alginate (APSA), which ensures WPU compatibility through hydrophilic segments and phosphor adsorption via hydrophobic moieties. The 5Mss@AUZ/WPU exhibited synergistically enhanced performance: 8 h post-excitation luminescence duration (via AUZ-sensitized rare-earth ion energy-level transitions), alongside improved thermal stability, hydrophobicity, and chemical resistance. Crucially, it demonstrated outstanding anticorrosion performance: impedance modulus of 2.64 × 10 6 Ω∙cm 2 , corrosion rate of 1.38 × 10 −5 mm/year, and protection efficiency of 99.56%, stemming from AUZ's physical barrier (layered structure) and rare-earth ions' chemical inhibition (dense passive oxide layers). The As-modified counterpart achieved a higher impedance modulus (3.99 × 10 6 Ω∙cm 2 ) due to stronger As ions chelation. Notably, the 5As@AUZ/WPU coating maintained bright and stable luminescence under harsh conditions (acid/alkali/salt immersion, UV irradiation), attributed to its robust corrosion-resistant barrier protecting internal luminescent crystals. This study elucidates the synergistic dual-functional mechanism between AUZ and rare-earth phosphors, enabling long-afterglow luminescence and robust corrosion protection, thus offering a sustainable materials platform for underwater detection and marine engineering.
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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2026
·
IF 7.9
Liujia Tian,Zeyu Chen,Tianxiong ZhuYi,Fan Peng,Xuemei Song,Yiling Huang,Yi Zeng
Under ultra-high temperature conditions (>1200°C), the fracture toughness of yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs) declines sharply. This critical performance bottleneck severely limits their further application in high-end equipment such as aero-engine hot-end components. To address this challenge, this study systematically investigated the mechanical property evolution and associated toughening mechanisms of high-entropy rare-earth niobate composites (RE 3 NbO 7 /RENbO 4 , where RE = Dy, Ho, Er, Y, Yb) across a broad temperature range. Results indicate that fracture toughness reaches 4.2 ± 0.2 MPa m 1 / 2 at 1200°C, significantly outperforming bulk YSZ (1200°C,1–2 MPa m 1 / 2 ). Using in-situ transmission electron microscopy, this study visually captured the dynamic evolution of ferroelastic domains in the RENbO 4 phase under thermal field effects. Based on crystallographic orientation, elastic anisotropy calculations, and thermal strain distribution characteristics, a temperature-segmented toughening mechanism was established: in the low-temperature range (<400°C), fine grains and interfaces play a dominant role, achieving toughening by inducing crack deflection; in the medium-to-high-temperature range (>600°C), the evolution of ferroelastic domains becomes prominent, with ferroelastic-domain-wall migration and variant reconfiguration associated with strain accommodation within the monoclinic ac-plane; around 800°C, a ferroelastic phase transition occurs, and the domain structure gradually disappears with the phase transition. This study has developed a novel candidate heat-resistant ceramic material with excellent high-temperature mechanical properties, while also providing the theoretical basis and technical support for the design and fabrication of high-toughness ceramics for extreme environments through domain engineering control.
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OPTICAL MATERIALS
·
2025
·
IF 4.2
Li Wang,Zhichao Jin,Zhongli Zhu
The SiO 2 –B 2 O 3 –Bi 2 O 3 –CaO (SBBC) luminous glass samples, co-doped with Tm 3+ , Dy 3+ , and Eu 3+ ions, were prepared. Upon 362 nm stimulation, the co-activated SBBC glasses exhibited distinct spectral transitions corresponding to Tm 3+ : 1 D 2 → 3 F 4 , Dy 3+ : 4 F 9/2 → 6 H 15/2 , 13/2 , as well as Eu 3+ : 5 D 0 → 7 F 2 in the 400–700 nm. Moreover, the study identified two significant energy transfer mechanisms, Dy 3+ →Tm 3+ and Dy 3+ →Eu 3+ , which contribute to the enhanced photoluminescence of the glasses. The optimal CIE coordinates were determined to be (0.3312, 0.3436), with CCT of 5552 K, as well as color purity of 2.55 %. Importantly, an investigation into the thermal stability of selected glass revealed an impressive ΔT of 140 °C. This study shows the potential value of glass in the field of W-LED.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Peiyuan Zhuang,Wei Liu,Haohao Cao,Yunan Lin,Yan Guo,Jinghui Zhang,Yanjie Zhang
A series of K 2 Y(WO 4 )(PO 4 ): Dy 3+ , Eu 3+ phosphors have been successfully developed via solid-state reaction method to generate color-tunable warm white light. Based on the phase identification and microstructure analysis, Dy 3+ ions singly-doped and co-doped phosphors all exhibit single phase of K 2 Y(WO 4 )(PO 4 ) crystal, demonstrating the substitution of Y 3+ ions by Dy 3+ ions in host lattice. Under near ultraviolet (NUV) excitation of 350 nm, Dy 3+ singly-doped K 2 Y(WO 4 )(PO 4 ) phosphors emit a cold-white light with correlated color temperature of 9266 K comprised by blue emission peak at 486 nm and yellow emission peak at 578 nm, which are attributed to 4 F 9/2 → 6 H 15/2 and 4 F 9/2 → 6 H 13/2 electronic transitions of Dy 3+ ions, respectively. Further, Eu 3+ and Dy 3+ ions are co-doped K 2 Y(WO 4 )(PO 4 ) host and Eu 3+ ions can be acted as red emission centers to achieve tunable photoluminescence properties in a single-phased phosphor excited by NUV chip with wavelength of 394 nm. It is proved by the photoluminescence spectra of Eu 3+ and Dy 3+ ions co-doped samples that there exist the energy transfer between Dy 3+ ions and Eu 3+ ions in the KYWP host, which belongs to the electric dipole-electric dipole interaction. Finally, CIE color coordinates of the generating white light by K 2 Y(WO 4 )(PO 4 ): Dy 3+ , Eu 3+ phosphors can be facilely adjusted from (0.3601, 0.3427) to (0.5161, 0.3547) with the increasing Eu 3+ ions concentration. The warm white light with tunable color temperatures of 4409 K, 3042 K, 2566 K and 1976 K can be achieved for K 2 Y(WO 4 )(PO 4 ): Dy 3+ , Eu 3+ phosphors, indicating a potential application in NUV white light emitting diodes.
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Journal of Materials Chemistry C
·
2025
·
IF 5.1
Linglu Kuang,Zhichao Liu,Yuan Xue,Xinran Wang,Dedan Mu,Hao Song,Yichun Liu,Peng Zhang,Xuhui Xu
Variations in the crystal field of optical crystal materials directly influence the energy level transitions and non-radiative relaxation processes of doped ions, resulting in changes to luminescence properties. However, current crystal field regulation strategies, such as matrix component regulation and ion doping, fail to achieve reversible control. This study introduces a control strategy for the crystal field using X-ray irradiation, enabling repeated adjustments of the Cs2KGdF6 crystal field, demonstrating excellent memory retention and cyclic stability. By modifying the crystal field environment of Cs2KGdF6, the emergence and quenching of Bi3+ photoluminescence can be precisely controlled. This reversible, irradiance-induced crystal field change phenomenon holds promising applications in X-ray imaging and radiation dose monitoring. This study also presents a strategy for managing crystal field changes.
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危险品化学品经营许可证（带存储）