CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Bowen Wang,Xuyan Xue,Changshuai Gong,Xuejiao Wang,Qiushi Wang,Ji-Guang Li
A series of Tb 3+ substituted layered perovskite Sr(La 1- x Tb x )AlO 4 ( x = 0–1) was synthesized via solid-state reaction. The influence of Tb 3+ on the phase, structure, photoluminescence, and long afterglow properties of the SrLaAlO 4 product was investigated. The fully substituted product SrTbAlO 4 was found to be isostructural with its SrLaAlO 4 counterpart, and the crystal structure parameters were first reported in this work. Photoluminescence investigation found that benefiting from the unique layered crystal structure, the activator Tb 3+ was well separated and the optimal doping concentration was found to be as high as 20 at%. Except for photoluminescence, the products simultaneously show long afterglow properties due to disorder cations distribution in the local structure and thus induced defect condition. When the UV light source is turned off, the afterglow luminescence of SrLaAlO 4 : 0.03 Tb 3+ can last over 1 h. The trap distribution of SrLaAlO 4 : Tb 3+ was analyzed in detail by thermoluminescence. The trap depth is calculated to be around 0.7–0.81 eV, the value of which highly coincides with the ideal energy level for trapping and releasing electrons at room temperature. On the basis of the experimental results, the mechanism of long afterglow luminescence of SrLaAlO 4 : Tb 3+ is elaborated and discussed.
研究领域:
材料科学
·
光学
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DOI
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ChemPlusChem
·
2025
·
IF 2.8
Shangzai Wu,Xiaolong Gong,Guojian Ren,Linglong Yi,Qi Zhou,Qinhe Pan
Graphical GA: A stable coordination polymer (HNU-90-Tb) is synthesized by the assembling of 4-carboxytriphenylamine and Tb 3+ , which exhibits highly selective detection of salicylaldehyde by fluorescence quenching with the limit of detection of 0.07 ppm and response time 30 s. The detection mechanism can be contributed to the internal filtration effect and dynamic quenching. Salicylaldehyde, an essential chemical intermediate, is extensively utilized in pharmaceutical and fragrance industries. However, the excessive usage leads to environmental pollution and poses potential risks to human body. Hence, it is urgent to develop the effective sensor for the detection of salicylaldehyde (SAL). Herein, a new terbium(III)-based coordination polymer ( HNU-90-Tb ) is constructed by the assembly of 4-carboxytriphenylamine (HL) with Tb 3 + . Benefiting from the hydrophobic structure of HL, HNU-90-Tb exhibits remarkable stability in aqueous environments and is capable of maintaining structural integrity in pH range of 2–11. Notably, HNU-90-Tb enables quantitative detection of SAL through fluorescence quenching, achieving a low detection limit of 0.07 ppm and a rapid response time of just 30 s. HNU-90-Tb also shows excellent selectivity toward a variety of aldehyde analogs. The detection mechanism can be attributed to the combined inner filter effect and dynamic quenching mechanism.
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高影响因子
Materials Chemistry Frontiers
·
2026
·
IF 8.1
Qian Zhang,LIN MA,Guo Wei Wang,Yuhang Huang,Luyang Du,Taifeng Lin,Zheng-Guang Yan
Rare-earth doping has emerged as a promising strategy to tailor the optoelectronic properties of metal halide perovskites, yet its potential for enhancing gamma-ray detection performance remains underexplored. The synthesis of large-sized, rare-earth doped perovskite single crystals remains challenging due to the adverse effects of dopants on crystal growth and lattice stability. Herein, we achieved 16 mm in-sized MA0.89FA0.11PbBr3: Tb single crystals (Tb/Pb=0.13%-0.67%) via nucleation control and precursor regulation. The X-ray fluorescence mapping confirms the uniform distribution of Tb3+ within the crystal lattice at low Tb/Pb ratio (≤0.35%). The successful incorporation of rare earth ions and a concomitant lattice contraction induce profoundly enhancing the charge transport characteristics. Specifically, doping with 0.13% Tb³⁺ increased the carrier mobility from 55 to 154 cm² V⁻¹ s⁻¹ and prolonged the carrier lifetime from 197 to 4422 ns. Consequently, the fabricated gamma-ray detector achieved a high energy resolution of 4.3 % for 241Am radiation (59.5 keV), a significant improvement over 15.7 %. This work demonstrates rare-earth doping as an effective strategy toward high-performance perovskite radiation sensors.
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MOLECULES
·
2024
·Vol. 29
·期 24
·5903
·
IF 4.2
Yang Zhang,Hua Tan,Jiaping Zhu,Linhai Duan,Yuchi Ding,Fenglan Liang,Yongshi Li,Xinteng Peng,Ruomei Jiang,Jiaxin Yu,Jianjiong Fan,Yuhang Chen,Rimeng Chen,Deyun Ma
The development of lanthanide–organic frameworks (Ln-MOFs) using for luminescence sensing and selective gas adsorption applications is of great significance from an energy and environmental perspective. This study reports the solvothermal synthesis of a fluorine-functionalized 3D microporous Tb-MOF with a face-centered cubic (fcu) topology constructed from hexanuclear clusters (Tb6O30) bridged by fdpdc ligands, formulated as {[Tb6(fdpdc)6(μ3-OH)8(H2O)6]·4DMF}n(1), (fdpdc = 3-fluorobiphenyl-4,4′-dicarboxylate). Complex1displays a 3D framework with the channel of 7.2 × 7.2 Å2(measured between opposite atoms) perpendicular to thea-axis. With respect to Ba2+cation, the framework of activated1(1a) exhibits high selectivity and reversibility in luminescence sensing function, with an LOD of 4.34665 mM. According to the results of simulations, compared to other small gas molecules (CO2, N2, H2, CO, and CH4), activated1(1a) shows a high adsorption selectivity for C2H2at 298 K.
研究领域:
材料科学
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环境科学
·
化学
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Jinyu Yang,Lin Luo,Zhuo Chen,Xueyu Chen,Xiaoyu Tang
Single phase of Tb-doped YPO 4 phosphors with xenotime structure were successfully synthesized via a polyacrylamide gel at different annealing temperatures (650–1050 °C). The crystal structure, thermal behavior and optical properties of the as-synthesized samples were investigated by XRD , TG-DTA, FT-IR, PL, and XPS . The effects of heat treatment on the structure and luminescence properties of samples were discussed. The PL spectra results reveal that the annealing temperature plays a key role in the luminescence properties of products. The samples obtained under 650–850 °C exhibit a strong green emission at 546 nm, attributing to the 5 D 4 - 7 F 5 transition of Tb 3+ , while the samples produced above 850 °C emit dominating blue lines at 381 and 415 nm, corresponding to the 5 D 3 - 7 F 6 and 5 D 3 - 7 F 5 transitions, respectively. The XPS results imply that a part of doping Tb 3+ ions may be oxidized to Tb 4+ on the high-temperature thermal treatment process, which could be the reason for the bluish color of Tb-doped YPO 4 phosphors.
研究领域:
材料科学
·
光学
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
An Wang,Jiayou Liao,Xu Wu,Xianjie Meng,Jiwei Ma,Siyuan Peng,Yinghua Shen,Chengyun Gao
This study employs the same diamine monomer to synthesize polyimide (PI) and Tröger’s Base-based polymers of intrinsic microporosity (TB), which exhibit infinite miscibility due to like-dissolves-like phenomenon. The TB and PI exhibit significantly different thermal decomposition temperatures, enabling the partial carbonization of TB at a lower temperature while retaining the favorable mechanical properties of PI. Consequentially, This work propose a novel method to prepare blend membranes with a partial amorphous carbon structure. These membranes have excellent gas separation performance, similar to that of carbon membranes, while also retaining the machinability of traditional polymer membranes. The molecular structure of the material is characterized using 1H NMR and FTIR spectra, while the microscopic morphology is observed through scanning electron microscopy. Molecular dynamics simulations confirm the compatibility of both polymers and explain the improved properties. Gas transportation measurement confirms that PI@TB blend membranes demonstrate significant improvement in gas separation performance compared to original membranes. Specifically, enhancements in the gas separation performance of CO 2 /CH 4 , H 2 /CH 4 , and O 2 /N 2 systems have been observed, with the CO 2 /CH 4 pair demonstrating the most remarkable improvements, surpassing the 2019 Robeson upper limit. This design strategy can be applied to produce blend membranes containing amorphous carbon that exhibit great potential for high-performance separation processes in the future.
研究领域:
材料科学
·
化学工程
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BIOSENSORS & BIOELECTRONICS
·
2015
·
IF 6.409
Qiang Chen,Junfeng Zuo,Jinfeng Chen,Ping Tong,Xiujuan Mo,Lan Zhang,Jianrong Li
In this paper, a novel label-free fluorescent biosensor for terbium (ш) (Tb 3+ ) was proposed based on structural conversion of G-quadruplex DNA mediated by Thioflavin T (ThT) and Tb 3+ . In the presence of K + , ThT could bind to K + -stabilized parallel G-quadruplex, giving rise to high fluorescence intensity . Upon the addition of Tb 3+ , Tb 3+ could competitively bind to parallel G-quadruplex leading to the structural change, which resulted in fluorescence decrease. The change of fluorescence intensity (Δ F = F 0 – F ) showed a good linear response toward the concentration of Tb 3+ over the range from 1.0 pM to 10.0 µM with a limit of detection of 0.55 pM. This proposed biosensor was simple and cost-effective in design and in operation with ultrahigh sensitivity and selectivity . Thus, the proposed biosensor could be a promising candidate for monitoring ultratrace Tb 3+ in environment.
研究领域:
生物化学
·
环境科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Jing Shi,Xiaozhan Yang,Hui Pan,Wenlin Feng
A new Tb-MOF [Tb(BDC)TDC] based on terephthalic acid (H 2 BDC) and thiophene-2,5-dicarboxylic acid (H 2 TDC) was synthesized successfully by solvothermal method . The crystal structure, morphology, thermal stability and photoluminescence properties were characterized in detail. Under the excitation of 310 nm, Tb-MOF presents bright green luminescence in aqueous solution. Bismuth-ion (Bi 3+ ) can quickly and specifically quench the luminescence of Tb-MOF, and the response time is only 9 s. The quenching mechanism is that Tb 3+ in the metal center of Tb-MOF is replaced by Bi 3+ , resulting in luminescence quenching and realizing the Bi 3+ detection. The quenching constant ( K sv ) and the detection limit for Bi 3+ are 0.024 μM −1 and 4.98 μM, respectively. The synthesized Tb-MOF can be used as the sensor for trace Bi 3+ detection in the aqueous solution.
研究领域:
材料科学
·
分析化学
·
纳米技术
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Chenglong Xia,Jiahui Yang,Bingyang Zeng,Chunmiao Cui,Haoyuan Weng,Yue Guo,Xiaoguang Liu,Ling Li
This study successfully synthesized Na 5 Y(WO 4 ) 4 doped with Sm³⁺, Pr³⁺, and Tb³⁺ using a high-temperature solid-state method. Photoluminescence spectra revealed that Na 5 Y(WO 4 ) 4 :Sm³⁺ phosphors emits a strong red glow at 646 nm under the excitation of 405 nm, and has an extremely high quantum yield, suggesting their suitability for plant growth LED lighting applications. In contrast, Na 5 Y(WO 4 ) 4 :Pr³⁺ phosphors displayed a lower efficiency but still aligned well with the red-wavelength absorption spectra of plants. Additionally, Na 5 Y(WO 4 ) 4 :Tb³⁺ phosphors demonstrated strong green emission under UV light, indicating potential applications in fingerprint detection. The Site Occupancy Theory (SOT) was utilized to explain the preferential occupation of dopant ions, showing that Sm³⁺ and Tb³⁺ preferred Y1 sites, whereas Pr³⁺ favored Na2 sites.
研究领域:
材料科学
·
光学
·
农业科学
·
法医学
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高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Wang Luo,Xintong Zhang,Kaofeng Huang,Bohan Wang,Yu Wang,Zhilie Tang,Kezhi Zheng
Long afterglow materials feature long-lasting luminescence after the cessation of the excitation source. The rising demand for afterglow materials in many applications such as deep tissue imaging, ultrasensitive sensing, and radiation detection has led to extensive research on X-ray-activated afterglow systems. However, the progress in this field is constrained by the limitation and shortage of radiation-induced afterglow materials. Herein, a newly X-ray-excited long afterglow phosphor CaZnOS:Tb 3+ has been developed by using lithium-assisted synthetic protocol. Afterglow properties of Tb 3+ -doped CaZnOS microcrystals are systematically investigated by considering the dopant concentration, reaction temperature, reaction time, reaction atmosphere, and gas flow . As the gas flow of argon atmosphere increases from 0.05 to 0.5 L/min, the CaZnOS:Tb 3+ microcrystals exhibit a distinct change in trap depth from 0.59 to 0.75 eV, corresponding to a gradual increase in afterglow time. Together with thermoluminescence analysis, the long afterglow mechanism is also discussed in this work. These results highlight the importance of reaction gas flow for the efficient regulation of traps and defects in afterglow materials. Furthermore, they provide a fundamental design principle and new route for the creation of lanthanide-doped CaZnOS afterglow phosphors.
研究领域:
材料科学
·
放射医学
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高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 23
·4103-4108
·
IF 3.545
Weiwei Xu,Hui Xu,Shuaihua Wang,Zhilin Wang,Xieming Xu,Xianhui Zhang,Shaofan Wu
Scintillators, which can emit visible photons under γ- or X-ray excitation, are widely used in radiation detection. Traditional inorganic scintillators usually have some drawbacks, such as hygroscopicity or a high synthesis temperature, and most of them are poisonous. Hence, we report the synthesis of metal iodate scintillators (Eu(IO3)3 and Tb(IO3)3) by a facile hydrothermal reaction that exhibit good radioluminescence (RL) intensity. To further increase the RL intensities, we prepared Eu(IO3)3:xSm and Tb(IO3)3:xGd with stronger RL intensities and higher sensitivities than BaF2 and PbWO4 powders when x = 3%. Furthermore, we obtained scintillating films consisting of Eu(IO3)3:3%Sm and Tb(IO3)3:3%Gd for X-ray imaging. Our Eu(IO3)3:3%Sm and Tb(IO3)3:3%Gd films revealed excellent luminescence under high-energy X-ray excitation and spatial resolutions down to 9 lp mm−1 and 8 lp mm−1, respectively. Thus, these films can be regarded as candidate materials for X-ray imaging.
研究领域:
材料科学
·
辐射探测
·
医学影像
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高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 12
·1023
·
IF 3.504
Dandan Ju,Feng Song,Adnan Khan,Feifei Song,Aihua Zhou,Xiaoli Gao,Huimin Hu,Xu Sang,Victor Zadkov
The dual-mode emission and multicolor outputs in the time domain from core-shell microcrystals are presented. The core-shell microcrystals, with NaYF4:Yb/Er as the core and NaYF4:Ce/Tb/Eu as the shell, were successfully fabricated by employing the hydrothermal method, which confines the activator ions into a separate region and minimizes the effect of surface quenching. The material is capable of both upconversion and downshifting emission, and their multicolor outputs in response to 980 nm near-infrared (NIR) excitation laser and 252 nm, and 395 nm ultraviolet (UV) excitation light have been investigated. Furthermore, the tunable color emissions by controlling the Tb3+-Eu3+ratio in shells and the energy transfer of Ce3+→Tb3+→Eu3+were discussed in details. In addition, color tuning of core-shell-structured microrods from green to red region in the time domain could be obtained by setting suitable delay time. Due to downshifting multicolor outputs (time-resolved and pump-wavelength-induced downshifting) coupled with the upconversion mode, the core-shell microrods can be potentially applied to displays and high-level security.Keywords:NaYF4:Yb/Er@NaYF4:Ce/Tb/Eu microrods;dual-mode emission;time-resolved emission spectra;multicolor emission
研究领域:
材料科学
·
光学
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PubMed
高影响因子
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