JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Huadong Liu,Jingliang Cheng,Hao Sun,Xiaoyu Sun
The rapid charge recombination in Bi 2 WO 6 severely limits its photocatalytic efficiency for antibiotic wastewater treatment. To address this, Eu 3+ -doped Bi 2 WO 6 was synthesized via controlled hydrothermal method, exhibiting 2.5-fold enhanced tetracycline (TC) degradation kinetics (0.05889 min −1 ) and 23 % higher efficiency than pristine Bi 2 WO 6 under visible light. Comprehensive characterization reveals three synergistic mechanisms: first, Eu 3+ incorporation induces lattice distortion and charge imbalance, generating oxygen vacancies that act as electron traps to suppress recombination; second, UV-Vis DRS shows bandgap narrowing from 2.8 to 2.3 eV enabling broader light absorption; third, electrochemical impedance spectroscopy demonstrates 3.1-fold improved charge separation efficiency. ESR and radical trapping experiments identify h + and ·O 2– as the dominant active species, with the former contributing approximately 68 % of the degradation activity according to quantitative analysis. The catalyst retains 88.57 % activity after four cycles, showing superior stability. This work provides atomic-level insights into rare-earth doping effects on charge carrier dynamics, offering a viable strategy for designing visible-light photocatalysts.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2015
·Vol. 99
·期 3
·881-887
·
IF 2.61
Meichao Gao,Dafeng Zhang,Xipeng Pu,Xin Shao,Hong Li,Dongdong Lv
Eu 3+ -doped BiOCl with different doping concentrations was synthesized by a simple combustion method. The as-synthesized photocatalysts were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscope, Raman spectroscopy, X-ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, and UV–vis diffuse reflectance spectroscopy. The experimental results show that Eu 3+ was successfully doped into the lattice of BiOCl. The as-synthesized Eu 3+ -doped BiOCl photocatalysts show a more intense continuous absorption in UV light region, accompanied with decreased energy band gap. Moreover, the Eu 3+ doping leads to the formation of oxygen vacancies, small crystallite size, and high specific surface areas. Compared with pure BiOCl, the Eu 3+ -doped BiOCl photocatalysts exhibits much higher photocatalytic activity for Rhodamine B (RhB) under UV light irradiation. As-obtained Eu 3+ -doped BiOCl can be easily reused with excellent stability. In addition, the mechanism of the improved photocatalytic properties of Eu 3+ -doped BiOCl was discussed in detail.
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高影响因子
International Journal of Applied Ceramic Technology
·
2021
·Vol. 18
·期 5
·1570-1581
·
IF 1.968
Yangyi Xu,Xiaohui Wang,Yunge Wei,Yuanxi Liu,Guifang Li
CaGd 2 (WO 4 ) 4 :Eu 3+ phosphors with controllable morphology were synthesized via the hydrothermal method. The influences of pH value, reaction time and Eu 3+ concentration on the crystal structure, morphology, and photoluminescence properties of CaGd 2 (WO 4 ) 4 :Eu 3+ were studied. The pure tetragonal structure CaGd 2 (WO 4 ) 4 is obtained when the pH value is 8 and 9. Furthermore, by altering the pH value of the reaction solution, the morphologies of the CaGd 2 (WO 4 ) 4 :Eu 3+ phosphors evolve from spindle-shaped grains to tetragonal plate-like grains and finally to aggregated bulk particles. Under the 394 nm excitation, the phosphors display a bright red emission corresponding to the characteristic 4 f -4 f transitions of Eu 3+ , and the intensity of emission peaks depends mainly on the pH value, the reaction time, and the Eu 3+ concentration. The optimum photoluminescence performance is achieved for CaGd 2- x (WO 4 ) 4 : x Eu 3+ ( x = 1) phosphor synthesized at pH = 8 under the reaction time of 16 h. Finally, the thermal stability of the phosphors is analyzed at different ambient temperatures.
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高影响因子
Science China-Chemistry
·
2016
·Vol. 60
·期 1
·122-129
·
IF 2.429
Zhang Shaohan,Chen Shizhu,Gao Chunyue,Jin Yi,Jia Guang,Li Zhenhua,Liu Dandan,Liang Xingjie,Yang Xinjian,Zhang Jinchao
As lanthanide-doped sodium yttrium flouride (NaYF 4 ) nanoparticles have great potential in biomedical applications, their biosafety is important and has attracted significant attention. In the present work, three different sized NaYF 4 :Eu 3+ nanoparticles have been prepared. Liver BRL 3A cell was used as a cell model to evaluate their biological effects. Cell viability and apoptosis assays were used to confirm the cytotoxicity induced by NaYF 4 :Eu 3+ NPs. Apart from the elevated malondialdehyde (MDA), the decrease of superoxide dismutase (SOD), glutathione peroxidase (GSH-PX) and catalase (CAT) activity indicated reactive oxygen species (ROS) generation, which were associated with oxidative damage. The decrease of mitochondrial membrane potential (MMP) value demonstrated the occurrence of mitochondria damage. Then, release of cytochrome c from mitochondria and activation of caspase-3 confirmed that NaYF 4 :Eu 3+ NPs induced apoptosis was mitochondria damage-dependent.
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高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Jinjie Zheng,Honglie Shen,Yufang Li,Huanlun Tong,Jingzhe Zhang,Zhihong Xie
In this study, a novel fabrication method for a bilayer film consisting of the Bi 2 Mo 3 O 12 :Eu 3+ and CaF 2 was developed. Bi 2 Mo 3 O 12 :Eu 3+ film was prepared using the chemical solution method, eliminating the need for separate phosphor preparation. The excitation spectra of Bi 2 Mo 3 O 12 :Eu 3+ displayed a broad band within the range of 300 and 420 nm. Under ultraviolet (UV) excitation, the material emitted strong red luminescence, with a dominant peak around 615 nm, which coincides with the absorption range of silicon solar cells. Additionally, a CaF 2 anti-reflection layer was introduced to enhance optical transmittance. The average transmittance of the Bi 2 Mo 3 O 12 :Eu 3+ @CaF 2 bilayer film reached 92.3%, representing a 0.7% increase compared to the bare glass substrate (91.6%). As a proof-of-concept, applying Bi 2 Mo 3 O 12 :Eu 3+ @CaF 2 to this bilayer film on photovoltaic modules resulted in an absolute enhancement of 0.19% in power conversion efficiency.
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高影响因子
POWDER METALLURGY AND METAL CERAMICS
·
2022
·Vol. 61
·期 3
·221-229
·
IF 0.913
Liang Dong,Xiong Sang,Zhang Xiaojuan,Lin Qing
Tungsten oxide is widely used in the photolysis of water for hydrogen production, photocatalysis, photoelectric conversion, and electrochromism. Eu 3+ doped tungsten trioxide nanoparticles were prepared by hydrothermal method with the addition of sodium tungstate (NaWO 4 · 2H 2 O). Two different samples were obtained at the temperature set at 160 and 180°C. The third sample obtained from ammonium paratungstate ((NH 4 ) 10 H 2 (W 2 O 7 ) 6 ) was used at the temperature of 160°C. The samples’ morphology, structure, and optical performance were then observed and analyzed. The results show that a rod-like structure of WO 3 : Eu 3+ nanoparticle with a monoclinic crystal system can be successfully generated using sodium tungstate. A spherical structure of WO 3 : Eu 3+ nanoparticle with a triclinic crystal system was prepared using ammonium paratungstate. The finished sample with ammonium paratungstate at a reaction temperature of 160°C has the smallest grain average size of 45.98 nm and Eu 3+ ions successfully doped. Under the excitation of different wavelengths, the three samples demonstrate pronounced emission peaks at around 615 nm, corresponding to the 5D 0 → 7F 2 electronic transition of Eu 3+ . Using ammonium paratungstate as the tungsten source, the prepared WO 3 : Eu 3+ nanoparticle at 160°C has the highest luminous intensity. The luminescence intensity of the prepared WO 3 : Eu 3+ nanoparticle from ammonium paratungstate as a tungsten source is higher than the other two samples obtained from sodium tungstate as a tungsten source at two temperatures. However, the three samples with excitation wavelength λ = 254 nm were monitored at the wavelength of 615 nm. All three samples exhibited the most substantial excitation peaks at about 508 nm, which belonged to the electron transition in 4f of Eu 3+ .
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高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Xueai Yin,Shuchen Lü
In this study, Sr 0.3 Ca 0.7 (MoO 4 ) 2 :xDy 3+ , yEu 3+ phosphors with and without charge compensation were produced using the coprecipitation method. Their crystal structure, luminescence performances, charge compensation, fluorescence lifetime , thermal extinguishing behavior as well as energy transfer mechanism were explored in detail. The X-ray diffraction patterns show that the appropriate amount of Dy 3+ /Eu 3+ single and co-doped in the lattice has no obvious influence on the crystal structure. The luminescence results showed that Sr 0.3 Ca 0.55 (MoO 4 ) 2 : 0.1Eu 3+ with charge compensation exhibited luminescence intensity 4.98 times higher than that of Sr 0.3 Ca 0.6 (MoO 4 ) 2 : 0.1Eu 3+ non-charge compensation. The luminescence intensity of Dy 3+ /Eu 3+ co-doped Sr 0.3 Ca 0.7 (MoO 4 ) 2 phosphors was significantly improved by charge compensation. Furthermore, efficient energy transfer from Dy 3+ → Eu 3+ was confirmed by emission spectra , excitation spectra, attenuation curves, and thermal quenching curves. This suggests that the charge compensation could significantly improve the Eu 3+ red emission. Therefore, the investigated SrCa(MoO 4 ) 2 : Eu 3+ , Dy 3+ phosphors may be a favorable candidate for promising applications in lighting.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 30
·期 3
·2327-2333
·
IF 2.324
Cao Renping,Xiao Hui,Zhang Falin,Cheng Xinyu,Su Lei,Xiao Fen,Luo Zhiyang,Chen Ting
A series of CaZrO 3 :Bi 3+ , CaZrO 3 :Eu 3+ , CaZrO 3 :Eu 3+ , Bi 3+ , and CaZrO 3 :Eu 3+ , Bi 3+ , Li + phosphors are synthesized by high-temperature solid-state reaction method in air. Their luminescence properties are researched, compared, and analyzed. CaZrO 3 :Bi 3+ phosphor under excitation at 310 nm emits deep-blue light with chromaticity coordinate (0.1612, 0.0254). CaZrO 3 :Eu 3+ phosphor under excitation at 310 and 395 nm shows red-emitting with chromaticity coordinate (0.6386, 0.3611). CaZrO 3 :Eu 3+ , Bi 3+ phosphor under excitation at 310 nm exhibits a systematically varied hue from deep-blue to red light by changing Eu 3+ ion concentration, and that with excitation at 395 nm only emits red light with chromaticity coordinate (0.6386, 0.3611). The energy transfer process from Bi 3+ to Eu 3+ ions may be indicated by their spectral properties. The optimal Eu 3+ and Bi 3+ ions concentrations are 5 mol% and 0.9 mol%, respectively. The emission intensity CaZrO 3 :Eu 3+ , Bi 3+ phosphor may be enhanced about 1.6 times due to the co-doping Li + ion as charge compensator role. The luminous mechanism of CaZrO 3 :Eu 3+ , Bi 3+ phosphor is explained by the simplified energy level diagrams of Bi 3+ and Eu 3+ ions.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 52
·期 6
·3110-3123
·
IF 2.302
Li Jingang,Wu Zheyi,Sun Xiaoyu,Zhang Xianwen,Dai Rucheng,Zuo Jian,Zhao Zhi
In this paper, Eu 3+ -doped yttrium tungstate (Y 2 WO 6 ) nanophosphors with different morphologies have been synthesized by a hydrothermal method with the assistance of cetyltrimethyl ammonium bromide. X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), and photoluminescence spectroscopy (PL) were used to characterize the products. The pH value of the starting solution plays a crucial role in the structures and morphologies of the samples. When the precursors synthesized under alkaline condition are annealed at 1100 °C in the air, the pure monoclinic Y 2 WO 6 phase can be obtained. The results of HRTEM and SAED are consistent with those of the XRD patterns, confirming the high crystallinity of the products. A detailed study of the optical properties, including the UV–Vis diffuse reflection spectra, the excitation and emission spectra, CIE coordinate, and color purity of Y 2 WO 6 :Eu 3+ nanophosphors with different doping concentrations, are presented here. The critical distance R
c and energy transfer mechanism for the concentration quenching of Eu 3+ ions are discussed in detail. In addition, the decay time and the thermal stability of the samples have been also investigated elaborately. The PL properties of the as-synthesized materials indicate promising applications in UV-pumped red light-emitting diodes.
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高影响因子
OPTICAL MATERIALS
·
2026
·
IF 4.3
Qingyuan Niu,Penghui Ma,Feng Luo,Xingyu Liu,Shuxin Yin,Xin Huang,Yumin Song
Red fluorescent powder has important applications in various fields such as display and lighting. In this paper, Eu 3+ /Nb 5+ co-doped SrTiO 3 fluorescent material was synthesized by hydrothermal method, and its phase structure, microstructure, luminescence properties, thermal stability and luminescence dynamic characteristics were systematically characterized. The results showed that under 395 nm near-ultraviolet excitation, the material emitted high-purity Eu 3+ characteristic red light at 612 nm; when the Eu 3+ doping content was 7 mol% and Nb 5+ was 3.5 mol%, the luminescence intensity was increased by 259% compared with single-doped Eu 3+ ,and the absolute quantum efficiency increased. Nb 5+ plays a dual role in this process, namely charge compensation and energy transfer modulation: On one hand, it inhibits the formation of lattice defects through charge balance between sites; on the other hand, it constructs an efficient light absorption center, enabling ultrafast energy transfer from the matrix to Eu 3+ . This material has stable color properties within the temperature range of 303-463 K, with no obvious color shift, and the thermal quenching activation energy is 0.34 eV, showing excellent thermal stability. This efficient and stable red fluorescent powder prepared by the Eu 3+ /Nb 5+ co-doping strategy has broad application prospects in near-ultraviolet excitation high color rendering index white LED and anti-counterfeiting encryption fields.
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高影响因子
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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高影响因子
INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Xue Bai,Jiayan Liao,Yueteng Zhang,Yingzhu Zi,Heping Zhao,Anjun Huang,Toan Trong Tran,Farhod Shokir,Zhiguo Song,Jianbei Qiu,Zhengwen Yang
The development of advanced X-ray-responsive detection materials is essential for ensuring radiation safety and enabling high-precision imaging. Here, we report a Bi2SiO5:Eu3+ phosphor that exhibits a synergistic multimodal optical response to X-rays, combining radioluminescence, reversible radiochromism, and tunable luminescence modulation within a single material. Upon irradiation, the phosphor undergoes a distinct and reversible color change from white to brown, which correlates linearly with the X-ray dose through a measurable decrease in reflectance. Simultaneously, both its photoluminescence and radioluminescence intensities vary linearly with radiation dose, enabling quantitative optical dosimetry. Spectroscopic and structural analyses reveal that the reversible behavior arises from oxygen-vacancy-mediated color centers, which form without altering the host lattice. Furthermore, a flexible composite film fabricated from Bi2SiO5:Eu3+ enables multimodal high-resolution (10.3 lp mm–1) X-ray imaging and direct visual dose readout. This work introduces a promising class of lead-free, multifunctional phosphors and offers mechanistic insight for next-generation intelligent X-ray detection and visualization technologies.
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PubMed
高影响因子
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