DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Xiaoqian Dong,Xiaochen Yu,Xu Zhang,Zhehan Zhang,Xiao He,Ruru Wei,Youru Bai,Jibin Fan
Tb-ZnO/reduced graphene oxide (Tb-ZnO/RGO) nanocomposites were prepared by a simple one-step solvothermal method. The samples were characterized by XRD , SEM, XPS, BET, FT-IR, and Raman spectroscopy , and their photocatalytic activities toward different pollutants (RhB, MO, PR, and MB) degradation were evaluated. Tb-ZnO/RGO nanocomposite shows enhanced photocatalytic activity with high kinetic constants (0.04 min −1 ) and good stability. Enhanced charge separation and migration have been analyzed using UV–Vis absorption spectra , PL spectra, and EIS analysis. Improved photocatalytic activity can be ascribed to the smaller band gap, larger specific surface area (28.3478 m 2 /g) and more effective separation and transport of photogenerated carriers by Tb 3+ and RGO. All the results show that the nanocomposite catalyst has a good application prospect in the degradation of pollutants.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2024
·
IF 3.2
Qi Zhang,Guoyu Zhao,Qingxian Zhao,Xian Wei,Wei Wei
Ultrathin and transparent scintillator films for X-ray microscopic imaging are urgently desired to accurately detect the internal tiny structure of objects in nondestructive way. However, it is great difficulty for the commercial scintillators (e.g., CsI:TI, LYSO:Ce) to obtain the ultrathin single crystal scintillators below 50μm. Additionally, scintillator powders such as Gd 2 O 2 S:Tb, when embedded in polymeric matrix, demonstrate significant scattering resulting from their opacity and substantial thickness. Here, we present a novel ultrathin (∼46μm) and transparent (∼90%) LaF 3 :Tb,Ce-polyvinyl alcohol (PVA) composite scintillator film with ultra-high loading content (∼85wt%) for high resolution X-ray microscopic imaging. It is obtained by thoroughly mixing directly precipitated LaF 3 :Tb,Ce nanocrystals (∼13nm) prepared by direct precipitation and PVA solution, followed by scraping and drying. The harmless solvent and low preparation temperature (below 100℃) contribute to its convenient and eco-friendly nature. More importantly, the film realizes high spatial resolution of 7μm thanks to its ultrathin and transparent feature.
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DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2015
·Vol. 15
·期 1
·549-555
·
IF 1.556
Huo Jiansheng,Wang Qianming
A group of LnM
v
O4 (M = Nb, Ta):RE3+ (RE = Eu3+, Tb3+) phosphors have been synthesized by pretreatments with a special reactor (supersonic microwave co-assistance (SMC) machine). Powder characteristics were studied by X-ray
Diffraction, photoluminescence, fluorescence microscope and scanning electronic microscope. Results showed the samples can exhibit green or red emissions upon the ultra-violet excitations. The influence of SMC method on the physical properties has been investigated in detail.
研究领域:
材料科学
·
发光材料
·
纳米技术
·
固态化学
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DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Muzhi Li,Xiaofeng Zhao,Yingzheng Liu,Di Peng,Weiwei Cai,Hong Liu
Phosphor thermometry has demonstrated significant potential for nondestructive high-temperature measurements in gas turbines . To expand the measurement range through lifetime-based phosphor thermometry, we developed a novel phosphor, YAG:Dy co-doped with Tb (YAG:Dy,Tb). Three YAG:Dy,Tb samples with varying Tb concentrations were synthesized through the sol–gel method. A fiber-optic-coupled measurement system was established to capture multiple emission peaks of YAG co-doped with Dy 3+ and Tb 3+ at 544 nm, 484 nm, and 458 nm. Efficient energy transfer from Dy 3+ to Tb 3+ resulted in a substantial enhancement of Tb 3+ emission at 544 nm under 355 nm excitation. Owing to the energy transfer, the temperature measurement range under the lifetime method was extended from room temperature to 1600 °C using the combination of Tb 3+ emission at 544 nm and Dy 3+ emission at 458 nm. YAG:Dy,Tb samples with higher concentrations of Tb 3+ exhibited superior temperature measurement performance, mainly owing to their stronger signal-to-noise ratio at >1000 °C. The performances of different emission peaks were also compared according to temperature uncertainty, which generally ranged from 0.1 °C to 2.7 °C across the entire measurement range.
研究领域:
光学传感器
·
材料科学
·
高温测温
·
发光光谱学
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DOI
高影响因子
LUMINESCENCE
·
2019
·Vol. 35
·期 2
·274-283
·
IF 1.691
Man Tang,Bo-Tao Zhang,Yanguo Teng,Meilin Liu,Yang Zhang
Based on the chemiluminescence (CL) phenomenon of peroxymonosulfate (PMS) and Tb(III) enhanced by its ligand in a micelle microenvironment, a fast and sensitive flow injection CL method for PMS detection was proposed and applied to the analysis of different samples and PMS decomposition. Under the optimized conditions, a linear range was obtained from 4.0 × 10 –6 mol L –1 to 2.0 × 10 –4 mol L –1 with a high correlation coefficient ( r = 0.9997), detection limit of 5.0 × 10 –7 mol L –1 (S/ N = 3) and relative standard deviation of 2.4% for 1.0 × 10 –5 mol L –1 PMS ( n = 9). This was successfully applied to the determination of PMS in Virkon powder, tap water, and swimming pool water samples with satisfactory recoveries from 94.8% to 104.8% . In particular, the analytical frequency could be as fast as five samples per minute because there was no reaction step before analysis and the CL phenomenon was instantaneous. Therefore, this CL method has also been successfully applied to investigate the PMS decomposition profiles in carbon material (carbon nanotubes, carbon nanofibres, activated carbon and graphene oxide) catalysis systems, which followed pseudo-first-order kinetics with good correlation coefficients ( r > 0.9305). Quenching experiments and electron spin resonance spectra verified that the CL phenomenon was due to the formation of singlet oxygen, and that hydroxyl and sulfate radicals might be important in the generation of singlet oxygen. Tb(III) is the luminescent emitter according to the characteristics emission bands of the fluorescence and CL spectra in different media.
研究领域:
分析化学
·
环境科学
·
材料科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jiajia Yuan,Yue Luo,Xinfeng Zhang
In this study, we developed a sensitive chemiluminescence (CL) method for the detection of Cr (Ⅲ) and Cr (VI), based on periodate (NaIO 4 )-hydrogen peroxide (H 2 O 2 )-terbium-based metal–organic frameworks (Tb-BTC MOF) system. Reactive oxygen species (ROSs) created from the reaction of NaIO 4 with H 2 O 2 , such as singlet oxygen ( 1 O 2 ), can effectively transfer energy to the Tb-BTC MOF, resulting in the characteristic emissions from Tb 3+ through the antenna effect. Compared to its bulk form, the nanoscale Tb-BTC MOF exhibited significantly enhanced CL intensity, which can be attributed to improved surface properties and reduced non-radiative decay. The presence of Cr (VI) led to a marked decrease in CL intensity due to energy competition with the H 3 BTC ligand. Additionally, Cr (III) was oxidized to Cr (VI) by NaIO 4 , thereby indirectly contributing to CL quenching. A linear correlation was observed between the concentrations of Cr (III)/Cr (VI) and the reduction in CL intensity, enabling quantitative analysis of both species. Following systematic optimization, the proposed method demonstrated good sensitivity, achieving detection limits of 33 nM for Cr (III) and 17 nM for Cr (VI), which are significantly lower than those obtained with fluorescence-based detection using Tb-BTC MOF. Furthermore, by employing a cation-exchange resin for pre-separation, Cr (III) and Cr (VI) could be individually quantified within mixed samples. This method was also successfully applied to real water samples, yielding satisfactory recoveries and demonstrating its practical applicability for chromium speciation analysis in environmental matrices. Overall, this work provides new insights into the design of advanced CL systems using nanostructured MOFs, offering a promising strategy for the selective and sensitive detection of metal ions in complex environmental matrices.
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产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2025
·
IF 3.1
Tang Qianyun,Huang Linling,Chen Tingting,Xie Feifei,Tan Hongyan,Chen Donghua
In this paper, a molecular imprinted metal-organic framework was prepared by a simple one-pot method using lanthanide terbium ions as the metal source, 2-aminoterephthalic acid as the organic ligand, and 4-nitrophenol as the template molecule at 120 °C. The materials of imprinted and non-imprinted metal-organic framework were characterized and analyzed by Scanning Electron Microscope, X-ray photoelectron spectroscopy, X-ray Diffraction, Brunauer-Emmett-Teller Specific Surface Area Analysis and fluorescence methods, etc., respectively. The fluorescence of the imprinted metal-organic framework was quenched by 4-nitrophenol in water, and there was a linear correlation between the fluorescence quenching efficiency of molecular imprinted metal-organic framework and the logarithm of 4-nitrophenol concentration in the range of 10–500 µmol L − 1 . The limit of detection was 3.3 µmol L − 1 (3σ) and the limit of quantitation was 11.0 µmol L − 1 (10σ). The molecular imprinted metal-organic framework was used for the determination of 4-nitrophenol concentration in water samples with the recoveries of 93.5-102.9% and the relative standard deviations less than 3.63%. The molecular imprinted metal-organic framework has the advantages of easy preparation, high stability, good sensitivity and selectivity, which has potential application for the detection of 4-nitrophenol in the environment samples. Graphical abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Liwei Cui,Yiqian Zhang,Weifeng Chen,Jingyi Liu,Heli Zhang,Hongshuai Zhu,Jian Zou,Weidan Chang
The extensive use of fluoroquinolones (FQs) leads to food residues, which present a significant risk to human health. A portable smartphone-assisted detection platform based on Tb/Eu-MOF nanomaterial was established for the detection of FQs, with the enrofloxacin (ENR) serving as a representative sample. Five Tb/Eu-MOFs with different bimetallic proportions were synthesized, and the Tb/Eu-MOFs (3:1) served as the optimal sensing element. The Tb/Eu-MOF nanomaterial suspension demonstrated a color change from orange-red to pale yellow as a result of fluorescence resonance energy transfer with ENR, attaining a LOD of 0.004 μM and a broad linear range of 0.005–25 μM. The Tb/Eu-MOF was incorporated into an agar slice and coupled with a smartphone for detection to improve portability. A smartphone-based agar slice platform was developed with a linear range of 5–150 μM and a LOD of 4.7 μM. This detection platform offers an innovative, low-cost and portable approach for FQs detection.
研究领域:
分析化学
·
纳米技术
·
食品安全
·
环境科学
·
生物医学工程
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hangqing Xie,Mengke Bai,Anqi Wang,Zi Chen,Feifan Chang,Jiadi Lian,Shiqing Xu
Triplet exciton is both a luminescence quenching factor and an important luminescence sensitization technology solution, which is widely concerned in the field of optoelectronic materials. Since X-ray excited triplet excitons are dissipated through various pathways, there are still huge difficulties in achieving efficient triplet sensitized emission. Here, the antenna ligand is regulated through the carboxyl group, increasing the steric hindrance between the conjugated groups and improving triplet-enhanced radioluminescence (RL) efficiencies of Tb 3+ . The lanthanide metal–organic frameworks (Ln-MOFs) formed by the coordination of Tb 3+ with mellitic acid (MA), pyromellitic acid (PMA) and trimesic acid (TMA) under low temperature preparation conditions. Among them, MA-Tb has a longer spacing between conjugated groups than PMA-Tb and TMA-Tb, and its triplet RL is relatively strongest, with a light yield of 28,000 photons MeV −1 . Mechanistic studies revealed that the RL efficiency of Ln-MOFs is related to the π-π stacking effect in the benzene ring. In addition, the application of MA-Tb in the field of X-ray detection was demonstrated. The RL intensity of MA-Tb has a good linear relationship with the X-ray dose rate, and the detection limit for X-ray reaches 82 nGy/s, which is 66 times lower than the typical medical imaging dose. These results will provide a universal strategy for the design of Ln-MOFs scintillator.
研究领域:
材料科学
·
光电材料
·
放射学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2019
·Vol. 20
·期 14
·3424
·
IF 4.183
Jianguo Li,Hongying Dong,Fan Yang,Liangcheng Sun,Zhigang Zhao,Ruixi Bai,Hao Zhang
In this work, LaPO4:Ce, Tb phosphors were prepared by firing a LaPO4:Ce, Tb precipitate using an ionic-liquid-driven supported liquid membrane system. The entire system consisted of three parts: a mixed rare earth ion supply phase, a phosphate supply phase, and an ionic-liquid-driven supporting liquid membrane phase. This method showed the advantages of a high flux, high efficiency, and more controllable reaction process. The release rate of PO43−from the liquid film under different types of ionic liquid, the ratio of the rare earth ions in the precursor mixture, and the structure, morphology, and photoluminescence properties of LaPO4:Ce, Tb were investigated by inductively coupled plasma-atomic emission spectroscopy, X-ray diffraction, Raman spectra, scanning electron microscopy, and photoluminescence emission spectra methods. The results showed that a pure phase of lanthanum orthophosphate with a monoclinic structure can be formed. Due to differences in the anions in the rare earth supply phase, the prepared phosphors showed micro-spherical (when using rare earth sulfate as the raw material) and nanoscale stone-shape (when using rare earth nitrate as the raw material) morphologies. Moreover, the phosphors prepared by this method had good luminescent properties, reaching a maximum emission intensity under 277 nm excitation with a predominant green emission at 543 nm which corresponded to the5D4-7F5transition of Tb3+.
研究领域:
材料科学
·
无机化学
·
发光材料
·
膜技术
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2016
·
IF 4.82
Dong Yan,Fei-Fei Mao,Jiang-Gao Mao
A series of lanthanide boroantimonates, namely, LnBSb2O8 (Ln = Sm 1, Eu 2, Gd 3, and Tb 4) have been successfully synthesized by high temperature solid-state reactions for the first time. They are isostructural and feature novel three-dimensional (3D) frameworks composed of 2D [Sb3O12]9– layers interconnected by 1D [SbBO7]6– chains with remaining BO3 groups hanging on the walls of the 1D 6-membered-ring (MR) tunnels along the a-axis, and the lanthanide ions filled in the voids of the anionic structure. They exhibit high thermal stability (up to 900 °C). Luminescent studies suggest that compounds 1, 2, and 4 have potential application as orange, red, and green light luminescent materials, respectively. Magnetic measurements reveal ferromagnetic coupling interactions in compound 3 and antiferromagnetic coupling interactions between magnetic centers in compounds 1, 2, and 4.
研究领域:
无机化学
·
材料科学
·
固态化学
·
发光学
·
磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xiaoqing Guo,Shuangju Song,Xue Jiang,Jingru Cui,Yunshuai Li,Wenqing Lv,Haiyan Liu,Yuanyuan Han,Liyong Wang
In this present work, a room temperature coprecipitation method for the synthesis of CaMoO 4 @SiO 2 :Ln (Eu 3+ , Tb 3+ , Dy 3+ ) phosphors was reported. These particles were characterized using X-ray diffraction (XRD), Energy dispersive spectrometer (EDS), Fourier Transform IR spectroscopy (FTIR), scanning electron microscope (SEM), UV-visible spectrophotometer and photoluminescence (PL) respectively. The results indicated that emission intensity of SiO 2 modified samples increased by about 2 times, compared with no-silica modified samples. Multicolor phosphors were also designed by changing the lattice activators (Eu 3+ , Tb 3+ , Dy 3+ ). To further explore its applications, the transparent photoluminescent film was developed through the incorporation of polyvinyl alcohol (PVA), and selective and sensitive detection performance on dichromate was demonstrated in detail. In addition, red emission LED devices was assembled with as-prepared phosphors. The present results provide not only the high-performance phosphors modified by silica , but also a deep explanation of the structure-property relationship of the as-prepared sample. Based on these findings, it can be foreseen that these microparticles will be applied in versatile filed.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）