CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jingxian He,Zhen Jiang,Yuan Liu,Zhenfeng Jing,Shuhui Sun,Haixia Zhang,Fengqing Zhang
This study successfully synthesized bismuth ferrite (BFO) thin films co-doped with europium (Eu) and aluminum (Al) using the sol-gel method, while comprehensively investigating their performance characteristics. By systematically adjusting the Al doping ratio in Bi 0.98 Eu 0.02 Fe1 -x Al x O 3 (with x = 0, 0.01, 0.03, 0.05, 0.07), significant changes in the material properties were observed. XRD and Raman spectroscopy validated the presence of R 3 c and Pnma phases in the synthesized BFO thin films, which demonstrated excellent crystallinity. Microstructural and compositional assessments, performed using SEM and XPS, indicated that the BEFAO5 sample possessed high crystallinity and a relatively low oxygen vacancy content. These characteristics enhanced the exceptional current-voltage (J-V) properties and ferroelectric behavior of BEFAO5. Additionally, the influence of vacancy defects on the ferroelectric efficiency and durability of BFO ferrite thin films was examined. The results indicated that the co-doping approach significantly improved the material's resistance to aging. In summary, the combined doping of Eu and Al not only substantially modified the crystalline structure and physical attributes of BFO thin films but also markedly enhanced their potential for applications in energy storage and spintronic technologies.
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DYES AND PIGMENTS
·
2023
·
IF 4.5
Pan Liu,Chenchen Ma,Zihan Ma,Ziyuan He,Xianjian Wang,Longhao Zhao,Xuegang Chen
The synthesis of a series of side-chain π-conjugated fluorene and terpyridine-functionalized hydrophilic poly(acrylamide) hydrogels via radical random copolymerization was reported. Based on the coordination of terpyridines and europium (III) ions, the dual-network hydrogels containing chemical covalent cross-linking bonds and metallo-supramolecular cross-linking bonds were prepared. Their structures and properties were studied systematically via NMR, IR, SEM , UV–vis absorption spectra , photoluminescence spectra and rheological. The photophysical properties showed that there was Förster energy transfer from conjugated chromophores (emission wavelength at 359–435 nm) to the europium emitter. The water content and the ratio of the energy donor and acceptor in the hydrogels make important influences on the energy transfer and then the emission color of the resulting dual-network hydrogel can be regulated from blue to red via controlling the degree of the energy transfer. Meanwhile, the dual-network hydrogels exhibited small and uniform pore structure and good mechanical properties with large storage and loss moduli .
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ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
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2016
·Vol. 22
·期 8
·1147-1155
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IF 1.87
Habimana Fabien,Huo Yanxia,Jiang Sai,Ji Shengfu
Europium metal organic framework (Eu-MOF) was synthesized using Europium as metal ion center and 1,3,5-trimesic acid (H 3 BTC) as organic ligand under hydrosolvothermal conditions. The dynamic performance of the Eu-MOF material in adsorption desulfurization processes was investigated using a solution of thiophene/n-octane as sulfur containing quality model oil. The adsorption desulfurization kinetics equations and adsorption desulfurization isotherms of Eu-MOF were also studied. The results have shown that Eu-MOF catalyst has very good adsorption desulfurization abilities under optimum desulfurization conditions of m adsorbent : m model oil ratio of 1:100 and reaction temperature of 303 K. After 4 h of desulfurization reaction, the adsorption rate and the adsorption desulfurization capacity has reached 64.70% and 24.59 mgS/gMOF respectively. The Eu-MOF adsorption desulfurization process of thiophene on Eu-MOF fits well the quasi two level dynamic model using Langmuir isotherm, Freundlich isotherm and Dubinin–Radushkevich isotherm equations. The Dubinin–Radushkevich isotherm can be a suitable description of adsorption process for Eu-MOF absorbent on thiophene/n-octane mode oil. However the Freundlich isotherm equation model with fitting R
2 value closer to 1, can be a better description for the adsorption of thiophene. The adsorption of thiophene over Eu-MOF absorbent has two types of adsorption that occur simultaneously. These are the monolayer physical adsorption and the multilayer chemical adsorption.
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ANALYTICAL CHEMISTRY
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2026
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IF 7.3
Yong Li,Dongping Fang,Chao Yang,Xike Tian,Yulun Nie,Jianbo Shi
The detection of per- and polyfluoroalkyl substances (PFASs) in the environment is critical due to their adverse health effects, but it remains challenging because of the high cost and technical complexity of standard analytical methods. We developed a series of rare earth-based bimetallic metal–organic frameworks (MOFs) for the sensitive and efficient fluorescence detection of perfluorooctanoic acid (PFOA). By systematically modulating the ligand functional groups with amino (−NH2), hydroxyl (−OH), and fluorine (–F) moieties, the influence of ligand electronegativity on the PFOA recognition performance was evaluated. The experimental results demonstrated that the local electrostatic potential of the MOFs, governed by the functional groups, is a critical factor in determining the PFOA binding affinity and fluorescence sensitivity. Eu/UiO-66-NH2 demonstrated the highest sensitivity and selectivity for rapid fluorescence detection of PFOA, which was due to its strong positive electrostatic potential to facilitate binding via electrostatic attraction and synergistic hydrogen bonding. PFOA concentrations in actual water samples can also be determined by Eu/UiO-66-NH2. These findings provide theoretical insights and experimental support for the functional design of MOF-based sensors, paving the way for the sensitive and selective detection of PFASs.
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PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.8
Kai Jiang,Tianxiang Hang,Ciyang Zhang,Mingzhu Xia,Qingli Hao,Wu Lei
A series of Eu x Tb 1-x L {Eu x Tb 1-x (5-bop) 3 (H 2 O) 4 } ∞ were synthesized using 3,5-dicarboxyphenylboronic acid (5-bop) as ligands via hydrothermal method. 5-bop ligand functions as an effective antenna, harvesting light and transferring the absorbed energy to both Eu 3+ and Tb 3+ . Tb 3+ acts as an intermediary donor, transferring a majority of its energy to the Eu 3+ . Eu 0.1 Tb 0.9 L is the best compound among Eu x Tb 1-x L series which exhibits excellent water stability and higher luminescence intensity compared to single-metal MOFs. It can selectively recognize dopamine hydrochloride (HDA) through fluorescence quenching, featuring fast response speed, high sensitivity, and strong resistance to interference. Additionally, the mechanisms responsible for the fluorescence quenching of Eu x Tb 1-x L include dynamic quenching and UV competitive absorption. This work provides an effective approach for the rapid and convenient detection of HDA in biological fluids.
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Journal of Physical Chemistry C
·
2026
·
IF 3.4
Ting Zhao,Lin Ma,Haoyang Guan,Chaofan Guo,Qian Zhang,Yuhang Huang,Weiran Chen,Taifeng Lin,Jiawen Xiao,Zheng-Guang Yan
Rare-earth (RE) doping has proven to be effective in enhancing the luminescent and optoelectronic properties of halide perovskites (HPs). However, the growth of RE-doped halide perovskite single crystals remains challenging. Herein, we successfully synthesized nine distinct MAPbBr3:RE (RE = Yb, Eu, Tb) single crystals (6–8 mm in size, RE/Pb = 0.008–0.053%) through systematic optimization of RE reagents, growth temperature, and solution concentration. Structural and optical characterization revealed RE-induced lattice expansion and band gap modulation, confirming the effective incorporation into the perovskite lattice. Furthermore, RE doping significantly improved the charge transport properties of MAPbBr3 single crystals. After doping Yb into MAPbBr3 (Yb/Pb = 0.013%), the trap density decreased from 9.2 × 109 to 2.5 × 109/cm3, carrier mobility increased from 59 to 799 cm2/(V s), and carrier lifetime increased from 199 to 2766 ns. These enhancements translated to exceptional γ-ray detection performance, with the energy resolution (ER) value for 241Am (59.5 keV) improved from 11.0% (for pristine MAPbBr3) to 6.3% (MAPbBr3:Yb) under a 5 V bias. This work not only establishes RE doping as a powerful strategy for optimizing the properties of halide perovskite semiconductors but also opens new avenues for the development of advanced radiation sensing materials.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Huihui Zhang,Qi Kang,Xuwei Chen
Anthrax is a serious zoonotic disease caused by Bacillus anthracis and dipicolinic acid (DPA) is the key component and major biomarker of Bacillus anthracis, therefore the development of rapid and sensitive DPA detection method is crucial to ensure public safety. In present study, carboxyl-functionalized covalent organic framework TpPa-COOH was synthesized using 2,5-diaminobenzoic acid and 2,4,6-triformylphloroglucinol as the building blocks, then Eu 3+ was immobilized onto TpPa-COOH via coordination interaction to give the fluorescent composite TpPa-COOH@Eu 3+ of dual-emissions. The presence of DPA significantly enhanced the characteristic emission of TpPa-COOH@Eu 3+ at 616 nm attributed by the “antenna effect” between DPA and Eu 3+ , thus a ratiometric fluorescent sensor was developed for the sensitive DPA detection with a detection limit of 9.5 nmol L −1 . The ratiometric fluorescent sensor offered DPA detection with high accuracy and favorable selectivity. The practicability of fluorescence sensor was validated by detecting DPA contents in real water samples. This research not only proposes a sensitive fluorescence method for anthrax biomarker detection, aiding in the prevention of biological threats and disease spread, but also highlights the potential of COFs in developing efficient ratiometric fluorescent probes with self-calibration capabilities.
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ACS Applied Optical Materials
·
2026
·
IF 3.4
Chaofan Wang,Gen Li,Ziran Li,Dixi Ke,Haocheng Li,Junwen Huang,Ziang Wan,Mengyao Zhu,Han Zhang,Jiejun Ren,Min Zeng,Yuebin Li
Phosphor-converted light-emitting diodes (pc-LEDs) represent a key technology in solid-state lighting. However, their performance and reliability are often limited by the thermal instability of conventional phosphors under high-power operation. To address this challenge, this study reports two thermally stable red-emitting phosphors, NaYMgWO6:Sm3+ and NaYMgWO6:Eu3+, synthesized via a high-temperature solid-state reaction method. A remarkable abnormal thermal quenching behavior is observed in NaY0.97MgWO6:0.03Sm3+, whose luminescence intensity at 348 K exceeds the room-temperature value. Meanwhile, NaY0.7MgWO6:0.3Eu3+ exhibits outstanding thermal stability, retaining 80.82% of its room-temperature emission intensity at 423 K. Under near-UV and blue excitation, NaYMgWO6:Sm3+ and NaYMgWO6:Eu3+ emit intense orange-red (645 nm) and red (615 nm) light with high color purity values of 85.81% and 96.58%, respectively, and show negligible chromaticity drift up to 448 K. Notably, the internal quantum efficiency reaches 27.59% for the Sm3+-doped phosphor and 88.86% for the Eu3+-doped counterpart. Practical application is demonstrated through fabricated pc-LED prototypes, which produce bright orange-red and red emissions. Furthermore, when incorporated into white LED devices along with a commercial yellow phosphor and a blue chip, the developed red phosphors effectively compensate for the spectral deficiency in the red region, significantly improving the color rendering performance and yielding warm white light with a high color quality. These results highlight the promising potential of the developed NaYMgWO6:Sm3+/Eu3+ phosphors for high-stability solid-state lighting applications.
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Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Guihua Cui,Yu Bai,Wenliang Li,Zhengguo Gao,Shuiying Chen,Nannan Qiu,Toshifumi Satoh,Toyoji Kakuchi,Qian Duan
A series of chain-end functional polymers composed of poly( N -isopropylacrylamide) (PNIPAM) and 2-amino-2-deoxy- d -glucopyranose( d -glucosamine, GA) was synthesized via atom transfer radical polymerization (ATRP). Novel fluorescent complexes of glucosamine-PNI- PAM/Eu(III) were then formed by chelation of the polymers and europium(III) ions. The aqueous solutions of the polymers and its Eu(III) complexes exhibited a lower critical solution temperatures (LCSTs), and which were approximately equal to body temperature. Cell viability assays suggested that these thermosensitive polymers and Eu(III) complexes showed excellent biocompatibility in vitro.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Jun Sun,Bei Zhang,Wei Zhu,Feifei Huang,Ruoshan Lei,Hongping Ma,Renguang Ye,Youjie Hua,Shiqing Xu
High-efficiency phosphor with excellent luminescence properties and thermal stabilities is essential for phosphor-converted white light-emitting diodes (w-LEDs). Compared with red and green phosphors, near-ultraviolet excited blue phosphors with high efficiency and excellent thermal stability are still scarce, and the development of efficient blue phosphors remains challenging. NaLi 3 SiO 4 : Eu 2+ (NLSO: Eu 2+ ) is a promising narrow-band blue phosphor. In this paper, a series of Na 1-y K y Li 3 SiO 4 : 5%Eu 2+ (0.05 ≤ y ≤ 0.2) phosphors were successfully synthesized by high-temperature solid-state reaction through co-doping a small amount of K + ions in the matrix, significantly improving their luminescence property and thermal stability. Because of the weaker electronegativity of K + ions, the emission peaks of Na 1-y K y Li 3 SiO 4 : 5%Eu 2+ were slightly blue-shifted from 467 to 463 nm compared with those of NLSO: Eu 2+ . With an increase in the number of K + ions, the luminescence intensity of the phosphors increased. When the content of the K + ion reached 0.2, the luminescence intensity of the Na 0.8 K 0.2 Li 3 SiO 4 : 5%Eu 2+ (NKLSO: 5%Eu 2+ ) phosphor reached its maximum. Compared to the NLSO: 5%Eu 2+ phosphor, the luminescence intensity increased by approximately 300 %. At 150 °C, the luminescence intensity of NLSO: 5%Eu 2+ phosphor was retained at 75.98 % compared with room temperature , while the NKLSO: 5%Eu 2+ phosphor maintained a luminescence intensity of 84.36 % relative to room temperature, demonstrating excellent thermal stability. The enhanced luminescence performance of the NKLSO: Eu 2+ phosphor makes it a promising high-efficiency blue phosphor for phosphor-converted w-LEDs.
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JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
·
2026
·
IF 2.1
Mingwei Wang,Hongyu Wen,Xiaoshi Lai,Zekai Zheng,Xin Wen,Junju Xu,Mingliang Kang,Hanyu Wu
Elucidating the immobilization mechanisms of radionuclides within heterogeneous host rocks is significant for the long-term safety assessment of high-level radioactive waste (HLW) geological repositories. This work evaluates the immobilization of Eu(III)—as a surrogate for trivalent actinide ions—on heterogeneous Tamusu claystones, focusing on the coupling effects of mineralogy and temperature (25–80 °C). At 25 °C, Eu(III) adsorption is governed primarily by the analcime content. Under elevated temperatures (50 °C and 80 °C), however, a contrast in retention behavior emerges between lithologies. Analcime-rich samples maintain high sorption stability (with the mineralogical ratio of (dolomite + ankerite)/analcime serving as a proxy for retention performance), whereas carbonate-rich samples exhibit complex behavior driven by the thermally induced dissolution of dolomite and ankerite. Thermodynamic modeling indicates that temperature elevation facilitates carbonate dissolution and shifts the dominant aqueous species at pH ∼9.3 from EuOH(CO 3 ) 2 - to EuOHCO 3 (s), thereby strengthening the retention capacity of Tamusu claystone to Eu(III)/Am(III). X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS) evidence reveal that Eu(III) retention is driven by a dual mechanism: ion exchange on analcime lattices and inner-sphere surface complexation on carbonate minerals. Therefore, dolomite/ankerite-rich samples may enhance Eu(III)/Am(III) immobilization through carbonate dissolution, and analcime-rich samples offer greater long-term predictability and stability. These trends are dependent on both temperature and pH changes. The findings highlight the synergistic role of mineral phases and radionuclide immobilization under near-field thermal conditions and provide essential thermodynamic data for radionuclide migration modeling and assessing the repository performance.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Yaping You,Ya Zheng,Zesheng Pan,Yunluo Wang,Tianrui Zhou,Minghui Wang,Haijie Chen,Wan Jiang,Lianjun Wang
White light-emitting diode (WLED) has been widely used as solid-state lighting in recent years, with the advantages of energy saving, high luminous efficiency , and safety. Red phosphors are crucial to the color rendering index of WLED, and Eu 3+ -activated red phosphors can significantly improve the chromaticity performance of WLED. In this work, a series of new orange-red emitting BaLiZn 3 (PO 4 ) 3 : Eu 3+ phosphors were synthesized through high-temperature solid-state reaction method. The phase composition , crystal structure, morphology and photoluminescence properties of BaLiZn 3 (PO 4 ) 3 : Eu 3+ samples were investigated. The phosphors can be effectively excited by the violet light at 394 nm and emit orange-red lights corresponding to the electric dipole transition (5D 0 →7F 1 ) at 594 nm. The optimal doping concentration of Eu 3+ ions was about 5 mol%. The concentration quenching was caused by the electric dipole-dipole interaction between Eu 3+ ions. Temperature-dependent PL spectra indicate that BaLiZn 3 (PO 4 ) 3 : Eu 3+ has excellent emission and color stability at high temperatures. The color coordinates were calculated and fall in the orange-red luminescent area. The color purity is about 98.3 %, and the correlated color temperature is 1710K. These results indicate that the new orange-red phosphor BaLiZn 3 (PO 4 ) 3 : Eu 3+ has potential application prospects in WLED.
研究领域:
材料科学
·
发光材料
·
固体照明
·
无机化学
·
光电子学
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