JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Feng Zhang,Dazhao Wang,Guanxin Du,Hongwei Li,Dianhao Hou,Yankun Qi,Shichao Lv,Shifeng Zhou
The scintillating photonic glass has the great potential for medicine imaging, nuclear physics, high-energy physics, and national defense. However, the development of the candidate with the high density remains a significant challenge. Herein, the superdense scintillating glasses derived from the Ce 3+ -activated Lu 2 O 3 -SiO 2 binary system were successfully fabricated by the strategy of contactless aerodynamic levitation heating under the N 2 atmosphere. These glasses are colorless, optical homogeneous, and exhibit superdense density from 6.59 to 7.15 g/cm 3 , representing the highest density among the fast decay glass systems. The materials present excellent radiation-blocking ability, suitable emission wavelength, and fast response, indicating the promise for fast-event X-ray detection. The micro radiation probe was fabricated by connecting the scintillating glass and the optical fiber. The practical application in remote radiation detection is demonstrated and it exhibits excellent linear response and high signal-to-noise ratio. The results confirm that the fabricated superdense scintillating glass is promising for application in the field of high-energy radiation detection.
研究领域:
材料科学
·
核物理学
·
医学成像
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Jiaqi He,Jiao Han,Menghong Li,Mingwei Li,Ju Zhou,Ping Yang,Shiqi Li,Wenhan Qi,Zehui Lin,Gang Wang,Yiming Zeng,Li Chen
A series of Sr 1‒1.5 x Lu x TiO 3 ( x = 0, 0.005, 0.01, 0.015, and 0.02) ceramics was sintered under an air atmosphere through the solid-state reaction method. The results show that doping with Lu 3+ considerably enhances material permittivity. The ceramic with x = 0.01 exhibits a colossal permittivity (CP) of ∼101000 with a tan δ of ∼0.16 at a frequency of 1 kHz, demonstrating enhanced stability over a wide temperature (30 to 300 °C) and frequency (10 2 to 10 6 Hz) range. Based on the analysis of dielectric relaxation, X-ray photoelectron spectroscopy (XPS), and the universal dielectric response law, the CP effect is primarily due to the formation of defect dipoles, which are correlated with the presence of oxygen vacancies, such as Ti 3+ Ti 3+ , , Ti 3+ , and Ti 3+ . These defect dipoles serve to pin electrons, limiting long-range transitions, and enhancing local polarization. Doping with Lu 3+ also induces a secondary Lu 2 Ti 2 O 7 phase, which are characterized by X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS). The results generated in this study can inform the development and application of new CP materials based on SrTiO 3 .
研究领域:
材料科学
·
固态化学
·
电子材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Huan Wang,Cen Shi,Liangliang Yin,Yanqin Ji
To remove lutetium from wastewater, superparamagnetic Fe 3 O 4 @SiO 2 –HOPO nanoparticles were successfully synthesized, containing approximately 460 μmol·g −1 of 3,2-HOPO. The material demonstrated high stability in 0.1 mol·L −1 HNO 3 and retained 97 % of its adsorption capacity after five cycles. The nanoparticles showed strong selectivity for lutetium, with minimal interference from coexisting ions in different matrices. This selective adsorption was primarily due to monodentate or multidentate chelation of 3,2-HOPO on the particle surface with lutetium. Adsorption equilibrium was achieved within 15 min, with a maximum capacity of 29 mg·g −1 , highlighting its potential for large-scale wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhongrui Liu,Fan Yang,Zhongxuan Sun,Qingshan Chi,Yazhu Li
This research reports the first study of selective leaching of ytterbium-lutetium oxides mixture with hydrophobic deep eutectic solvents (DESs), and high-efficiency and simple-prepared were used to separate and beneficiate lutetium. With hydrophobic DESs, which were formed with hydrophobic salicylic acid (SA) or 3,5-dinitrosalicylic acid (DNS) as the hydrogen bond donor (HBD) and hydrophobic tri-n-octyl phosphine oxide (TOPO) as the hydrogen bond acceptor (HBA), powdered eutectic mixtures of ytterbium-lutetium oxides were leached. The separation factor of ytterbium-lutetium was concluded to reached 2.11 with a solid-liquid (S/L) ratio of 1/50 g/ml, a temperature of 90 °C and a 4 h leaching time, and the experimental conditions, such as the S/L ratio, temperature and reaction time, were explored. The formation of intermolecular hydrogen bonds between the HBD and HBA was revealed through multiple methods, such as IR (disappearance of OH characteristic peaks), 1 H NMR (formation of sharp peaks not present for intramolecular hydrogen bonds) and 31 P NMR (shift of P = O peaks to higher fields). The lattice energies of the intermolecular hydrogen bonds and the solid oxide lattice energies, which were calculated with Gaussian 16 software (0.87 eV for SA/TOPO = 1:1 and 0.94 eV for DNA/TOPO = 1:1) and the Born–Haber cycle (12957.56 kJ/Mol for Yb 2 O 3 and 12993.59 kJ/Mol for Lu 2 O 3 ), provided a theoretical illustration of preferential Yb/Lu dissolution leading to separation. The stripping, regeneration and recycling capabilities of the DESs were investigated with stripping and recirculation experiments. Based on these results, the new DES as the leaching agent to separation of ytterbium lutetium oxide is identified as a new efficient mothed with industrialization potential.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Ruofeng Wang,Ying Shi,Jianjun Xie,Fang Lei,Lingcong Fan,Ding Zhou
The thulium and holmium co-doped lutetium aluminum garnet (Tm,Ho:LuAG) ceramics were fabricated by vacuum sintering at 1760 °C for 10 h. The raw powders free of sintering aids were synthesized by co-precipitation method. The phase composition, crystalline behaviors, and morphology of the powders calcined at different temperatures were studied by scanning and transmission electron microscopy . Well-dispersed Tm,Ho:LuAG powders with the primary particle size of 80 nm were obtained by calcinations at 1200 °C for 2 h in the muffle furnace. The influence of agglomeration state of starting powder on densification and microstructure of Tm,Ho:LuAG ceramic was explored. The in-line transmittance of Tm,Ho:LuAG ceramic with the thickness of 1 mm reached 83.0% and the corresponding optical attenuation coefficient was about 0.013 mm −1 at 2500 nm. The average grain size of the Tm,Ho:LuAG ceramic was about 1.7 μm. It is promising that the Tm,Ho:LuAG optical ceramic would be a suitable candidate to realize lasers output at 2.1 μm.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 7
·3019-3029
·
IF 3.784
Zhi Wang,Wenzhen Xiao,Junkang Zhang,Jilong Huang,Mingyang Dong,Haifeng Yuan,Tongshuai Xu,Liran Shi,Yuqiang Dai,Qingqing Liu,Jing Yang
Orthorhombic LuFeO 3 is an important member of rare-earth orthoferrites ReFeO 3 whose appealing physical features have drawn much attention due to its various potential applications. In this work, pure phase LuFeO 3 ceramics have been prepared by a mechanochemical activation-assisted solid-state reaction (MAS) method and conventional solid-state reaction (CSS) method for comparison. X-ray Diffraction (XRD) studies demonstrated that the mechanochemical activation process can lower the starting reaction temperature and substantially shorten the time to complete the reaction of LuFeO 3 ceramics. Besides, more homogeneous and highly denser LuFeO 3 ceramics can be obtained using the MAS method revealed by the density measurement and Scanning Electron Microscopy. It was revealed by XRD and Raman measurements that there is a little increase in lattice constant in the MAS sample compared to the CSS sample. The complex impedance spectra illustrated that the MAS sample has a much higher resistance than the CSS sample, which is caused by the higher density and fewer oxygen vacancies verified by X-Ray Photoelectron Spectroscopy. We believe that this study will contribute to solving the common leakage problems in ReFeO 3 ceramics and the investigation of its multiferroic properties.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Xiang-Yang Chen,Zhi-Jun Zhang,Lin-Lin Zhu,Meng Xu,Hong Wang,Ai-Guo Li,Jing-Tai Zhao
Novel Lu 2 WO 6 :Eu 3+ films with excellent luminescence performance were successfully prepared by Pechini method for the first time and characterized with X-ray diffraction (XRD), micro X-ray fluorescence imaging (μ-XRF), atomic force microscope (AFM), and X-ray excited luminescence (XEL), etc. Eu 3+ -doped films emitted strong red light peak wavelength at 612 nm under both UV light or X-ray excitation. The optimal annealing temperature and Eu 3+ -doped concentration are around 950 °C and 10 mol%, respectively. In addition, luminescence mechanism associated with Eu 3+ site occupation and possible energy transfer of Lu 2 WO 6 :Eu 3+ films have also been proposed. The optimized thin film shows great potential for applications as a candidate for X-ray imaging due to its high density, suitable emission wavelength and high light yield.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Tianshe Yang,Peilin Wu,Ruifeng Chen,Jingfei Ni,Chao Xu,Xiangmei Liu,Shi Wang,Shujuan Liu
Scintillators are of significance for X-ray excited luminescence (XEL) imaging from scientific research to medical diagnostics application. Rare earth fluoride nanocrystals possess distinctive luminescent properties originated from the abundant energy level of lanthanide activators, showing potential applications as next-generation scintillators. Herein, high Z atomic rare earth element lutetium was chosen to synthesized NaLuF 4 -based nanoscintillators by Tb doping. Core-shell structure was fabricated to further enhance the XEL emission intensity. The NaLuF 4 -based nanoscintillators was demonstrated more efficient XEL emission with 3-folds increase compared to NaYF 4 nanocrystals. NaLuF 4 nanocrystals with a 25 mol% Tb doping and an inert shell coating exhibited excellent scintillation performance with detection limit as low as to 57.05 nGy air s −1 . X-ray imaging demonstrated a high spatial resolution of 10.5 lp mm −1 using a scintillator film made from as-prepared NaLuF 4 -based nanoscintillators. Finally, such NaLuF 4 -based scintillators film have been applied in X-ray imaging application for a chip and a biological specimen. This study proposed an effective strategy to enhance XEL for rare earth fluoride, providing the ability for high-quality X-ray imaging.
研究领域:
材料科学
·
医学影像
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 7
·期 1
·168-182
·
IF 8.683
Peiran Huang,Zuhui Wen,Yue Yu,Jingyi Xiao,Zhanhua Wei,Tianshuai Lyu
X-Ray or 254 nm UV-light charged storage phosphors have various promising applications such as in anti-counterfeiting and information storage. However, developing such storage phosphors with high charge carrier storage capacity remains challenging. In this work, photoluminescence spectroscopy, thermoluminescence (TL), and vacuum-referred binding energy (VRBE) diagram were combined to study the trapping and liberation processes of charge carriers in Bi3+ and/or Ln3+ (Ln = Tb, Pr, or Dy) doped LiLuGeO4. Unintended defects act as good electron trapping centers, while Bi3+, Tb3+, and Pr3+ act as hole-capturing and recombination centers. Dy3+ does not act as an electron trapping center but as a luminescence center by energy transfer from Bi3+ → Dy3+. The ratios of the integrated TL intensities between 303 K and 650 K for LiLuGeO4:0.005Bi3+, LiLuGeO4:0.005Bi3+,0.005Tb3+, or LiLuGeO4:0.005Bi3+,0.005Dy3+ after X-ray charging to that of the state-of-the-art BaFBr(I):Eu2+ is about 1.24, 0.59, and 0.90, respectively. More than 10 h or 40 h afterglow was measurable in both LiLuGeO4:0.005Bi3+ and LiLuGeO4:0.005Bi3+,0.005Tb3+ after X-ray or 254 nm UV-light charging. The stored charge carriers stored can be efficiently excited to produce optically stimulated luminescence with a wide range 365 nm UV-light to 850 nm infrared laser beam. Proof-of-concept colour-tailorable afterglow, X-ray irradiation time or sample mass-dependent dosimetry, and optically-stimulated luminescence with a wide range of 365 nm UV-light to 850 nm infrared laser stimulation will be demonstrated for anti-counterfeiting, information storage, and display applications in the developed Bi3+ and/or Ln3+-doped LiLuGeO4. This work not only reports Bi3+ and/or Ln3+ doped LiLuGeO4 storage phosphors with excellent charge carrier storage capacity but also deepens our understanding of the afterglow and storage phosphors and luminescence mechanisms, which can guide us to explore new afterglow and storage phosphors for multimode applications.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Qi Sun,Shaoying Wang,Balaji Devakumar,Liangling Sun,Jia Liang,Thangavel Sakthivel,Sanjay J. Dhoble,Xiaoyong Huang
A series of novel high-brightness double perovskite tantalate Eu 3+ -activated Ca 2 LuTaO 6 (CLT) red-emitting phosphors with high thermal stability were successfully synthesized by a high-temperature solid-state method. X-ray diffraction (XRD), emission and excitation spectra, decay curves, temperature-dependent photoluminescence spectra, CIE chromaticity coordinates, as well as internal quantum efficiency (IQE) were used to analyze these phosphor samples. Under 396 nm excitation, the CLT:Eu 3+ phosphors gave brilliant red emission peaking around 616 nm due to the 5 D 0 → 7 F 2 transition of Eu 3+ ions. The optimal Eu 3+ doping concentration was 40 mol%, and moreover, the critical distance ( R c ) and θ were 8.55 Å and 5.01, respectively. Thus, the dipole-dipole interaction may be responsible for the energy transfer mechanism of Eu 3+ activators in the CLT:Eu 3+ phosphors. In addition, the color purity of CLT:0.4Eu 3+ sample was calculated to be 95.8% and its IQE was found to be as high as 74%. Impressively, the integrated emission intensity of CLT:0.4Eu 3+ was about 3.79 times higher than that of commercial Y 2 O 3 :Eu 3+ red phosphors under 396 nm excitation. More importantly, the CLT:0.4Eu 3+ sample exhibited excellent thermal stability. Therefore, these superior luminescence properties of CLT:Eu 3+ phosphors demonstrated their potential applications in white light-emitting diodes (WLEDs) as red color converters.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Ceramics
·
2020
·Vol. 9
·期 6
·674-682
·
IF 2.889
Liu Ziyu,Toci Guido,Pirri Angela,Patrizi Barbara,Feng Yagang,Wei Jiabei,Wu Feng,Yang Zhaoxiang,Vannini Matteo,Li Jiang
The Yb:Lu 2 O 3 precursor made up of spherical particles was synthesized through the co-precipitation method in the water/ethanol solvent. The 5 at% Yb:Lu 2 O 3 powder is in the cubic phase after calcination at 1100 °C for 4 h. The powder also consists of spherical nanoparticles with the average particle and grain sizes of 96 and 49 nm, respectively. The average grain size of the pre-sintered ceramic sample is 526 nm and that of the sample by hot isostatic pressing grows to 612 nm. The 1.0 mm-thick sample has an in-line transmittance of 81.6% (theoretical value of 82.2%) at 1100 nm. The largest absorption cross-section at 976 nm is 0.96×10 −20 cm 2 with the emission cross-section at 1033 nm of 0.92×10 −20 cm 2 and the gain cross sections are calculated with the smallest population inversion parameter β of 0.059. The highest slope efficiency of 68.7% with the optical efficiency of 65.1% is obtained at 1033.3 nm in quasi-continuous wave (QCW) pumping. In the case of continuous wave (CW) pumping, the highest slope efficiency is 61.0% with the optical efficiency of 54.1%. The obtained laser performance indicates that Yb:Lu 2 O 3 ceramics have excellent resistance to thermal load stresses, which shows great potential in high-power solid-state laser applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
·
2020
·Vol. 24
·期 08
·1038-1046
·
IF 1.816
Zengduo Cui,Xin Wang,Jiale Ding,Yunhe Zhang,Zhenhua Jiang,Xuefeng Li
To enhance the nonlinear optical properties of graphene oxide in organic solvent and polymeric matrix, lutecium phthalocyanines (LuPc) and hyperbranched lutecium phthalocyanines (HBLuPc) have been grafted on the surface of graphene oxide, respectively. After the surficial modification, the electron transfer process between phthalocyanines and graphene oxide has been also facilitated, resulting in significant fluorescence quenching. Given the combination of nonlinear scattering, two-photon absorption with reverse saturable absorption and the photo-induced electron or energy transfer from the electron donor (phthalocyanine moiety) to the acceptor (graphene oxide), stronger nonlinear optical properties can be realized based on graphene oxide hybrids compared with graphene oxide and phthalocyanines. Furthermore, graphene oxide hybrid modified by hyperbranched lutecium phthalocyanines exhibits the best optical limiting response and the highest nonlinear extinction coefficient at 532 nm in both organic solvent and polymeric matrix. Interestingly, we also find that it could exhibit better optical limiting properties than those possessed by pure phthalocyanine at 1064 nm.
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）