INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Zhenfeng Xiong,Ying Huang,Nan Li,Chaozhi Zhang,Yonghua Li,Zhuo Yang,Weidong Zhou,Kemei Zhou,Rong Zha,Changdong Sheng
Recovery of rare-earth elements (REEs), especially those of Dy and Nd, from Nd–Fe–B permanent magnets is crucial for sustainable development. Herein, an unsymmetrical pentanediamide extractant, N,N′-dimethyl-N,N′-didecyl-3-oxapentanediamide (DMDDOPDA), was synthesized and characterized for the effective extraction of Dy(III) and Nd(III). DMDDOPDA can form coordination bonds with metal ions because of the strong electron-donating abilities of the N and O atoms. The coordination sites might be inclined toward one side during the extraction. DMDDOPDA exhibited superior extraction performance in the HNO3 system than it did in the HCl system. The highest extraction efficiencies of Dy(III) and Nd(III) under optimal conditions were 99.9% and 99.5%, respectively, while their optimum stripping efficiencies were 100% and 85.3%, respectively. DMDDOPDA extraction of Dy(III) and Nd(III) in the four investigated diluents involved the formation of a neutral coordination complex. This study provides new insights into REE extraction using pentanediamide extractants.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Hui Li,Ziyao Wang
Ba 3 Lu 4 O 9 :Dy 3+ ,Eu 3+ phosphors were developed through the conventional solid-state reaction. Luminescent performance including the energy transfer from dysprosium to europium , spectral tunability, fluorescent lifetime and thermal quenching behavior of the as-studied phosphors was studied. The characteristic emission of Dy 3+ and Eu 3+ were detected in Ba 3 Lu 4 O 9 :Dy 3+ ,Eu 3+ upon the excitation at various ultraviolet–visible wavelengths. The critical distance between dysprosium and europium ions was evaluated to be about 16.05 Å. The energy transfer from dysprosium to europium in Ba 3 Lu 4 O 9 can be attributed to the dipole-quadruple mechanism, and the efficiency was evaluated to be 81.8% for Ba 3 Lu 3.52 O 9 :0.16Dy 3+ ,0.32Eu 3+ . The tunable warm-white emission and high thermal stability reveal that the as-studied phosphor can be an auspicious alternative for white LEDs application.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·Vol. 26
·期 46
·28971-28979
·
IF 2.9
Yuhan Fan,Yongze Cao,Meiling Li,Sai Xu,Yichao Wang,Xizhen Zhang,Jinsu Zhang,Baojiu Chen
A series of Tb3+, Pr3+ and Dy3+ monodoped CaTa4O11(CTO) persistent luminescence (PersL) phosphors have been successfully synthesized using the molten salt method with KCl flux. The PersL color is green and orange for Tb3+ and Pr3+ or Dy3+ doped samples, respectively. The trap depth of Tb3+, Pr3+ and Dy3+ monodoped CTO is 0.33, 0.31 and 0.30 eV, respectively. The PersL time of 3 mol% Tb3+, 1 mol% Pr3+ and 1 mol% Dy3+ monodoped samples is 52.20, 35.00 and 59.46 s, respectively. Tb3+, Pr3+ and Dy3+ monodoped CTO phosphors can be used in luminescence displays and anti-counterfeit labels under commercial 254 nm UV light.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2024
·
IF 3.2
Zhichao Jin,Zhongli Zhu
A series of SiO 2 -B 2 O 3 -ZnO-La 2 O 3 -BaO (SBZLBa) glasses doped with Dy 3+ and Eu 3+ were synthesized using the melt-quenching technique. Their optical characteristics and potential applications in W-LED devices were investigated. The structural effects resulting from doping the glass with Dy 3+ and Eu 3+ ions were elucidated through infrared spectroscopy and an examination of the physical properties. The variations in emission intensity within the fluorescence spectrum validated the sensitizing effect of Dy 3+ on Eu 3+ within the glass matrix. By manipulating the transitions of both Dy 3+ and Eu 3+ , the excitation wavelength was altered, enabling the realization of cool white, neutral white, and warm white luminescence, thus accommodating the diverse requirements for white light emission in lighting applications. After incorporating 1.0 mol% of Dy 2 O 3 and 0.8 mol% of Eu 2 O 3 , respectively, the glass exhibited CIE coordinates of (0.3332, 0.3535), positioning it within the white light spectrum and in close proximity to the ideal white light coordinates of (0.33, 0.33). The SBZLBa-Dy 2 O 3 –0.8Eu 2 O 3 glass exhibited a quantum yield of 5.98 %. It has been demonstrated through acid and alkali resistance tests that this glass possesses excellent chemical stability. Additionally, temperature-dependent emission spectra have revealed that the luminous intensity of the glass maintains over 85 % of its room temperature value at 185 °C, with Eα determined to be 0.2387 eV.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 16
·1-14
·
IF 2.8
Cao Renping,Cao Ya,Rong Yongtong,Lan Bang,Nie Jingheng,Zhang Lei,Chen Yuyu,Wang Jing
Eu 3+ and Dy 3+ as activators in luminescence materials have been widely investigated because of their superior luminous properties. In this work, we synthesize Sr 2 MgSi 2 O 7 :Dy 3+ , Sr 2 MgSi 2 O 7 :Eu 3+ , and Sr 2 MgSi 2 O 7 :Eu 3+ , Dy 3+ in air via the solid-state reaction method. We research crystal phase and purity of all samples via XRD, discern their crystal structure and space-group, and investigate their luminescence properties. The yellow emission of Sr 2 MgSi 2 O 7 :Dy 3+ with emission spectrum in the range of 450–775 nm can be observed due to the 4 F 9/2 → 6 H 15/2 , 6 H 13/2 , 6 H 11/2 , and 6 H 9/2 transitions of Dy 3+ ion. The red emission of Sr 2 MgSi 2 O 7 :Eu 3+ in the range of 550–725 nm is shown owing to the 5 D 0 → 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 transitions of Eu 3+ ion. Sr 2 MgSi 2 O 7 :Eu 3+ , Dy 3+ under excitation 388 nm shows yellow emission with chromaticity coordinates (0.3578, 0.3911) and glows red–orange light with chromaticity coordinates (0.5753, 0.3863) under excitation 394 nm. Sr 2 MgSi 2 O 7 :Eu 3+ , Dy 3+ can shows tunable emission when the ratio between Eu 3+ and Dy 3+ ions is changed. The energy transfer from Dy 3+ to Eu 3+ ions are known via the spectral features. Sr 2 MgSi 2 O 7 :Eu 3+ , Dy 3+ has a good thermal stability. Luminous mechanisms and energy transfer process of samples are analyzed by the energy level diagrams of Dy 3+ and Eu 3+ ions.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Renping Cao,Caiping Chen,Fangrui Cheng,Ting Chen,Bang Lan,Lan Li,Ru Liu,Jing Wang
In this work, we synthesize Ca 3 Bi(PO 4 ) 3 :Dy 3+ , Ca 3 Bi(PO 4 ) 3 :Eu 3+ , and Ca 3 Bi(PO 4 ) 3 :Eu 3+ , Dy 3+ . The crystal structure, phase purity, and the luminescence properties of samples are investigated, respectively. Ca 3 Bi(PO 4 ) 3 :Dy 3+ under excitation at 350 nm shows yellow emission because of the 4 F 9/2 → 6 H 15/2 , 6 H 13/2 , 6 H 11/2 , and 6 H 9/2 transitions of Dy 3+ . Ca 3 Bi(PO 4 ) 3 :Eu 3+ with excitation at 394 nm emits red-orange emission due to the 5 D 0 → 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 transitions of Eu 3+ ion. Ca 3 Bi(PO 4 ) 3 :Dy 3+ , Eu 3+ with excitation at 394 nm mainly shows the emission of Eu 3+ , however, that with excitation at 350 nm mainly derive from Dy 3+ ion. We investigate the effects of the ratio between Dy 3+ and Eu 3+ in Ca 3 Bi(PO 4 ) 3 :Eu 3+ , Dy 3+ on the luminescence properties. The energy transfer from Dy 3+ to Eu 3+ in Ca 3 Bi(PO 4 ) 3 :Eu 3+ , Dy 3+ is found. We analyze the luminous mechanism of samples by energy level diagrams of Dy 3+ and Eu 3+ ions. The results are helpful for the research of other Dy 3+ and Eu 3+ co-doped luminescence materials.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Qinjiang He,Renli Fu,Xiufeng Song,Haitao Zhu,Xinqing Su,Chaoqun You
Herein, Ce 3+ and Ce 3+ /Dy 3+ co-doped Ca 3 Al 2 O 6 phosphors have been designed and synthesized via a facile citrate-based sol-gel technique, and their structural, photoluminescence properties and energy transfer phenomenon were investigated comprehensively. The XRD analysis indicated that pure Ca 3 Al 2 O 6 phase can be synthesized at low temperature (1000 °C) for merely 2 h. The photoluminescence spectra showed the dominant emission of Ce 3+ singly doped phosphors is located in the blue region even at low Ce 3+ doping level, which indeed favors the energy transfer from Ce 3+ to other luminescent centers. When Dy 3+ is co-doped into Ca 3 Al 2 O 6 :Ce 3+ phosphors, the remarkable sensitizing effect of Ce 3+ on Dy 3+ is validated by comparatively analyzing the excitation, emission spectra and average lifetimes of the series of samples. Through the concentration quenching theory, the critical distance between Ce 3+ and Dy 3+ is calculated to be 13.50 Å. Furthermore, the energy transfer mechanism between them is most likely ascribed to electric dipole-dipole interaction. In virtue of the variation of the emission intensities of Ce 3+ and Dy 3+ , the emitting colors of Ca 3 Al 2 O 6 :Ce 3+ , Dy 3+ phosphors can realize tunable luminescence from deep blue to bluish-white region through controlling the Dy 3+ content. Based on these analysis, Ca 3 Al 2 O 6 :Ce 3+ , Dy 3+ phosphors could potentially be applied as a single-phase color-tunable phosphors pumped by near-ultraviolet (n-UV) radiation.
研究领域:
材料科学
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光学
✓ 已验证
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DOI
高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 41
·4077-4084
·
IF 3.532
Zerong Long,Shilin Shen,Hui Yuan
Carbamate (CB) pesticides possess potential carcinogenic and mutagenic activities towards humans even at very low dosages. Thus, broad-specificity probes with high sensitivity and speed are needed for multiple CB determination. This study is the first to focus on Dy3+ ions-coordinated self-assembly on a silica core using a surface imprinting procedure, for the simultaneous fluorometric detection of residues of metolcarb (MC) and pirimicarb (PC) insecticides. A simple and mild solvothermal method was applied for the preparation of fluorescent imprinted microspheres starting from 1,10-phenanthroline (Phen)-ligated Dy3+ ions to guide imprinted self-assembly of chitosan (CTS), glutaraldehyde (GA), and two carbamate pesticides (MC and PC) on the silica surface by means of coordinate bonds and hydrogen bonds. The as-prepared microspheres displayed strong fluorescence emissions via the antenna effect derived from the Phen ligand and the Schiff base oligomers for sensitizing the Dy3+ ions. An expanded in-depth mechanism study was performed on the fluorescence enhancement involving Förster resonance energy transfer (FRET) from the pesticides (donor) to the acceptor. A linear increase in fluorescence at 483 nm for MC and 574 nm for PC upon the imprinted microspheres was observed under the same 350 nm excitation wavelength. Moreover, the quantitative recognition process could be carried out simultaneously and tolerate strong distractions both from five other similar carbamate insecticides and from complicated matrices (e.g., an extract of Chrysanthemum morifolium Ramat). The detection limit was 4 ng mL−1 with a range of 10–60 ng mL−1 for MC and 0.4 ng mL−1 with a range of 1–30 ng mL−1 for PC. Further characterization of the material, including TEM, SEM, XPS, and FTIR, Raman, and fluorescence spectra, verified that the Dy3+ ions play a decisive role in promoting imprinted self-assembly around the silica core. Hence, a novel polynuclear Ln–organic imprinted probe having high selectivity, stability, and sensitivity for the detection of two carbamate insecticides is presented in this study.
研究领域:
分析化学
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环境科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 103
·期 12
·6847-6859
·
IF 3.502
Yan Sun,Fei Yu,Meisong Liao,Juping Ma,Xin Wang,Dongbing He,Weiqing Gao,Jonathan Knight,Lili Hu
In this work, we systematically study the spectroscopic properties of Tb 3+ /Dy 3+ co-doped phosphate glasses in the visible spectral region and explore the sensitization role of Dy 3+ in the enhancement of visible fluorescence of Tb 3+ ions. Judd-Ofelt parameters Ω 2 and Ω 4 /Ω 6 of the phosphate glass as host for Tb 3+ are calculated as 21.60 × 10 -20 cm 2 and 0.73, respectively, based on the measured spectral absorption. Multiple energy transfer (ET) routes from Dy 3+ to Tb 3+ and their efficiencies are characterized, and the enhanced fluorescence properties of Tb 3+ are investigated, including the emission spectral strength and the spontaneous emission lifetime as functions of Dy 3+ doping concentration. The efficient nonradiative ET processes between Dy 3+ and Tb 3+ allow a moderate concentration level of Tb 3+ to achieve favorably stronger spectral absorption at blue and ultraviolet wavelengths. Tb 3+ /Dy 3+ co-doped phosphate glass shows promising potential for phosphors and lasing operation at visible wavelengths.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2020
·Vol. 9
·期 12
·126006
·
IF 2.142
Yu-Guo Yang,Zhi-Jian Li,Xiang-Gang Zuo,Rui Zhang,Xu-Ping Wang,Qing-Gang Li,Bing Liu,Xian-Shun Lv,Lei Wei,Yuan-Yuan Zhang
We synthesized Dy3+ doped SrLaGa3O7 phosphors via a sintering process at 1350 °C under atmosphere. The X-ray diffraction data demonstrate that they have the pure tetragonal phase, meaning the successful substitution of Dy3+ in SrLaGa3O7 host. Monitoring at 572 nm, Dy3+ doped SrLaGa3O7 phosphors show a series of excitation bands within 275–475 nm. Exciting at 342 nm, Dy3+ doped SrLaGa3O7 phosphors show emission bands in the range of 450–700 nm. The emission bands respectively locate in blue, yellow and right light regions, which respectively correspond to 4F9/2 → 6H15/2, 4F9/2 → 6H13/2 and 4F9/2 → 6H11/2 transitions of Dy3+. The concentration quenching is induced by dipole-dipole interactions among neighboring Dy3+ ions. There is only one peak in the thermoluminescence glow curves of Dy3+ doped SrLaGa3O7 phosphors, indicating that there is only one type of trap center in these phosphors. The trap depth is calculated to be 0.754 eV.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 11
·1-15
·
IF 2.8
Zheng Lingling,Wen Juanjuan,Wu Jiayi,Deng Huajuan
This research involved the synthesis of a series of single-phase oxyapatite-type phosphors, Ba 2 La 3 (SiO 4 ) 2 (PO 4 )O:Dy 3+ through a high-temperature solid-state reaction methodology. A comprehensive examination was undertaken to elucidate their crystallographic structure, phase homogeneity, morphological features, photoluminescence (PL) properties, and thermal stability. Phase purity was meticulously assessed via X-ray diffraction (XRD) analysis, confirming the hexagonal crystal system alignment with space group P 6 3 / m (No.176) for the Ba 2 La 3 (SiO 4 ) 2 (PO 4 )O:Dy 3+ phosphors. Excitation at 349 nm revealed a triplet of distinguished emission peaks situated at wavelengths of 480 nm (attributed to the 4 F 9/2 - 6 H 15/2 transition), 572 nm (corresponding to 4 F 9/2 - 6 H 13/2 ), and 664 nm (stemming from 4 F 9/2 - 6 H 11/2 transitions). The investigation pinpointed a 0.05 mol concentration of Dy 3+ as the optimum doping level within the Ba 2 La 3 (SiO 4 ) 2 (PO 4 )O matrix for maximized luminescence. Of note, these phosphors exhibit an abnormal thermal quenching behavior alongside a substantial activation energy barrier E a = 0.37 eV, underscoring their robustness at elevated temperatures. The exhaustive findings from this study for advocating the application of these phosphors in light-emitting devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2016
·
IF 2.435
Liangjun Zhou,Wenxi Wang,Sicen Yu,Bo Nan,Yinggang Zhu,Yang Shi,Haohong Shi,Xingzhong Zhao,Zhouguang Lu
Single-phase and Dy 3+ /Eu 3+ co-doped novel phosphor LiY(MoO 4 ) 2−x (WO 4 ) x :Dy 3+ ,Eu 3+ , emitting white luminescence under near ultraviolet (NUV) light, was prepared through sol-gel method. The preparation and characterization of this phosphor were systematically studied by X-ray diffraction and spectrofluorophotometric measurements. The molar ratio of metal ions and citric acid (R m/c ) and calcination temperature greatly influenced the phase purity of sample, revealing that the pure phase could be obtained by using R m/c = 1:2.5 and calcination temperature = 800 °C. Under NUV excitation, the as-prepared phosphor exhibited the emissions of 485, 572 and 612 nm, which intensities could be affected by the pH and the concentrations of molybdenum and tungsten ions. By doping appropriate concentrations of Dy 3+ and Eu 3+ , white light emitting phosphor LiY(MoO 4 ) 1.2 (WO 4 ) 0.8 :6%Dy 3+ ,7%Eu 3+ with good responsiveness to NUV light was obtained. The Commission Internationale de L’Eclairage chromaticity coordinates were calculated to be (x = 0.334, y = 0.322), close to the D 65 illuminant (x = 0.313, y = 0.329), indicating the potential application for NUV WLEDs.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）