SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Guang Wu,Shipeng He,Liwen Wang,Dating Tian
Thorium (Th) has a wide range of applications in industries such as medicine and the nuclear industry, so it is critical to develop effective detection technologies to avoid the hazards they pose to the environment and human health. In this study, we used 4, 4′, 4″-(1, 3, 5-triazine-2,4,6-triyl)tribenzoic acid (H 3 TATB) as the starting material to form a hydrogen-bonded organic framework (TATB-HOF) at room temperature by hydrogen-bonding self-assembly. We then functionalized it with Eu 3+ using a post-synthesis modification approach to produce a red-fluorescent HOF(Eu@TATB-HOF). The luminescence mechanism of Eu@TATB-HOF was caused by the ligand-to-metal charge transfer-assisted energy transfer (LMCT-ET) between TATB-HOF and Eu 3+ . Eu@TATB-HOF was stable in an aqueous solution and enabled highly sensitive detection of Th 4+ . When Th 4+ concentrations ranged from 2.0 to 37.0 mmol/L, the fluorescence intensity of Eu@TATB-HOF showed a good linear relationship with the concentration of Th 4+ ions, with a detection limit of 1.5 mmol/L. Furthermore, several methods were used to demonstrate that the fluorescence quenching of Eu@TATB-HOF by Th 4+ was mostly mediated by the inner filter effect (IFE). Finally, this probe was successfully used to detect Th 4+ ions in real samples.
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·
IF 1.5
Wang Xuebin,Mao Guoshu,Yu Shengjie,Fu Zhihai,Yue Yuanzhen,Zhang Shengdong,Ding Youqian,Huang Kun,Zhang Xian,Sun Xiaoyi
Responding to the need for radioactive waste disposal, the static and dynamic adsorption of Eu 3+ on TODGA-C resin in HNO 3 was investigated. The findings indicated that the adsorption of Eu 3+ on TODGA-C adheres to the quasi-second-order kinetic model. Additionally, the distribution coefficient for Eu 3+ adsorption on TODGA-C reaches 10 5 mL/g in 4 mol/L HNO 3 . Under the conditions of 3.5 mol/L HNO 3 , a flow rate of 3.6 mL/min, and an initial Eu 3+ concentration of 10 mg/L, the Thomas rate constant was found to be 1.2 mL/(mg·min), with a dynamic saturation capacity of 15 mg/mL.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiazhuang Chen,Yuke Zhong,Dongdong Wang,Mei Li,Wei Han,Yalan Liu,Weiqun Shi
The variable valence rare earth elements are difficult to separate due to their similar properties and intermediate valence states in molten salts. In order to realize their efficient and selectivity separation, the properties and separation methods of Sm, Yb, and Eu have been investigated in a low-temperature AlCl 3 -NaCl molten salt. It has been found that the oxidation reactions of different Ln(II) to Ln(III) have different potentials. The Ln(II)/Ln(III) reaction is also irreversible when the AlCl 3 content is less than 50 mol%, Ln(III) exists in the form of LnCl 3 precipitation. Therefore, selectively modulating the valence of Sm, Yb, and Eu by electrochemical methods can achieve their separation. The LnCl 3 produced from the Ln(II) electro-oxidation precipitates and separates from the other unoxidized soluble Ln(II) in AlCl 3 -NaCl melt. The efficient separation of Ln(II) in AlCl 3 -NaCl can be achieved by pulse potentiostatic electrolysis. Under these conditions, the separation factors of Sm-Eu, Sm-Yb, and Yb-Eu can reach 10 3 . The maximum removal of Ln(II) exceeded 99 % with a maximum current efficiency of more than 90 %. Most importantly, the separation of variable valence rare earth elements has been realized in a low-temperature AlCl 3 -NaCl melt.
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 12
·7840-7845
·
IF 1.093
Cheng Zi-Qiang,Yu Ping,Shi Hai-Quan,Liu Zhi-Min,Cheng Guang-Ling,Cheng Hong-Bo,Liang Shan
In this study, In(OH)3 nanocrystals with three morphologies including rods, cubes and spheres were synthesized through a hydrothermal method. The morphology and crystalline were manipulated by controlling the growth speed and the addition of ascorbic acid. The InVO4
nanocrystals were obtained by a process sacrificing In(OH)3 templates. The phase transformation of rods and cubes generated size-controllable products, whereas that of nanospheres formed hollow micro-spheres. InVO4 nanocrystals display a brilliant yellow emission band
with the peak at 517 nm. Intriguingly, luminescent rare-earth Eu ions with red emission could be doped into InVO4 nanocrystals during the phase transformation. Excitation and the emission spectra indicated an excitation energy transfer from the vanadate to the rare-earth ions.
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Analytical Methods
·
2017
·Vol. 10
·期 3
·359-364
·
IF 1.9
Yongli Yu,Jianli Niu,Wei Li,Haixia Liu,Meng Wang
An approach for Brilliant Blue (BB) detection was established based on fluorescence resonance energy transfer, where YVO4:Eu nanocrystals (NCs) are used as the energy donors and BB as the energy acceptor. BB could be electrostatically combined with the YVO4:Eu NCs and the fluorescence of the nanocrystals was quenched. Under optimal conditions, the logarithm of fluorescence intensity of the YVO4:Eu NCs was linearly proportional to the BB concentration in the ranges of 2.5 × 10−6–2.5 × 10−4 and 2.5 × 10−4–2.5 × 10−3 g L−1. The limit of detection was 1.0 × 10−6 g L−1. The method was successfully applied for BB detection in juices and candies. This method has a number of advantages, such as the facile synthesis of YVO4:Eu NCs, a simple and quick quantitative procedure and competitive analytical performance.
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Advanced Optical Materials
·
2022
·Vol. 10
·期 6
·2102373
·
IF 10.05
Zhiyu Yang,Gaochao Liu,Yifei Zhao,Yayun Zhou,Jianwei Qiao,Maxim S. Molokeev,Hendrik C. Swart,Zhiguo Xia
The discovery of Eu 2+ -doped high-efficiency red phosphors remains a vital challenge for white light-emitting diode (WLED) applications. It is therefore urgent to find effective strategies managing the oxidation state to help reduce Eu 3+ to Eu 2+ and accordingly increase the photoluminescence quantum yield (PLQY). Herein, a new red-emitting SrLaScO 4 :Eu phosphor is designed, and the PLQY is enhanced from 13% to 67% under 450 nm excitation by employing (NH 4 ) 2 SO 4 -assisted sintering. Combined structural analysis, optical spectroscopy, and theoretical calculation reveal that predominant Eu 2+ prefers to occupy the Sr 2+ sites in the SrLaScO 4 enabling red emission, and a competitive site occupation of Eu 3+ in La 3+ can be restrained, and the reduction mechanism of Eu 3+ to Eu 2+ originating from the (NH 4 ) 2 SO 4 addition is analyzed. The fabricated WLED device using red-emitting SrLaScO 4 :Eu and yellow-emitting Y 3 (Al,Ga) 5 O 12 :Ce 3+ exhibits a high color-rendering index of 86.7 at a low correlated color temperature of 4005 K. This work provides a feasible reduction strategy for guiding the development of high-efficiency Eu 2+ -doped red phosphor for WLED applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xiaobin Zhao,Quansheng Wu,Xufeng Zhou,Shanshan Ye,Jianyan Ding
The realization of Eu 3+ reduction and its reduction mechanism have become focal points in the field of WLED phosphor research. In this study, the reduction of Eu 3+ was successfully achieved through cationic substitution strategy by replacing Zr 4+ with Hf 4+ in Na 2 ZrSiO 5 :Eu 3+ . The effects of substituting Hf 4+ for Zr 4+ on the phase, crystal structure, and luminescence properties of Na 2 Zr 1- x Hf x SiO 5 :Eu 0.03 (0 ≤ x ≤ 1) were thoroughly investigated based on Rietveld refinement , spectral data, DFT calculation and electronegativity of ions. Comprehensive consideration was given to the effect of site size change and site reducibility on Eu 3+ reduction. The results demonstrate that the reduction of Eu 3+ in Na 2 Zr 1- x Hf x SiO 5 :Eu 0.03 is attributed to the alteration in inducible effect caused by cationic substitution and the enhancement in site reducibility rather than changes in site size. Therefore, the cationic substitution strategy based on induction effect presents a novel approach for achieving Eu 3+ reduction and offers a new insight into developing and modifying Eu 2+ -activated phosphors.
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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.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Kai Xu,Ruoyin Luo,Mingen Wu,Yi Xu,Chenggen Li,Ming Yang,Yuan Dong
Amorphous Co-Eu-B nanoclusters confined in mesoporous Al 2 O 3 were fabricated by an impregnation–chemical-reduction route. Their hydrogen-evolution performance during NaBH 4 hydrolysis was benchmarked against Co-B and Eu-modified Co-B analogues. Structure-activity correlations reveal a three-fold synergy. Geometric confinement by the Al 2 O 3 scaffold prevents nanoparticle agglomeration. Mixed-valent Eu 3+ /Eu 2+ injects electrons into Co via concurrent B → Co and Eu → Co pathways, generating an electron-rich Co δ− core. The Eu-Al-O interface markedly increases Lewis-acid site density, facilitating H 2 O polarization and B-H bond cleavage. Owing to this coupling, the optimised Co-Eu-B/Al 2 O 3 catalyst (Eu/Co = 0.17) delivers a peak hydrogen-generation rate of 2987.81 mL min −1 g −1 at 30 °C, lowers the apparent activation energy to 39.21 kJ mol −1 , and retains full activity over five consecutive cycles-outperforming previously reported Co-based systems. The study elucidates, for the first time, how rare-earth dopants and support engineering co-operate through structural, electronic and acid–base regulation, providing a transferable blueprint for low-cost, highly active and durable hydrolysis catalysts suitable for portable fuel cells and distributed hydrogen technologies.
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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.
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Food Analytical Methods
·
2026
·Vol. 19
·期 10
·274
·
IF 3
Wang Shiyi,Feng Kunyang,Zhao Minzhu,Wang Yusen,He Xin,Wang Qi,Wang Hanting,Li Jianbo
Organophosphorus pesticides (OPs) are extensively used for pest control in crops, yet their residues pose potential threats to food safety and human health. Therefore, this study developed a dual-ligand metal–organic framework with stable red fluorescence as a ratiometric fluorescent sensor for highly sensitive detection of omethoate (OMT). The sensor utilizes Eu 3 ⁺ as the metal node and employs 3,5-dicarboxyphenylboronic acid (BBDC) and 2-hydroxyterephthalic acid (BDC-OH) as mixed organic ligands. The introduction of OMT significantly quenches the red fluorescence of Eu-BBDC/BDC-OH through the inner filter effect (IFE), enabling the quantitative analysis of OMT. The sensor exhibits a good linear response within the ranges of 0.025–0.3 μg/mL and 0.3–0.9 μg/mL, with a detection limit of 7.35 ng/mL, and demonstrates excellent selectivity. Recoveries of OMT from strawberry and cucumber samples ranged from 95.74% to 101.1%, with relative standard deviations of 0.59%-5.91%, validating the reliability and practicality of the method. Moreover, a paper-based sensor integrated with smartphone RGB analysis was constructed, allowing rapid, real-time, and visual detection of OMT residues.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Yue Li,Ping Liu,Xiaoxue Han,Longyu Guo,Haiyan Jiang,Yongchao Ma
A heterojunction with g-C 3 N 4 @Zn/Eu-MOF covalent interface was synthesized. • g-CN@MOF can be used for photocatalytic degradation and fluorescence detection of ofloxacin. • Efficient removal of ofloxacin in milk by g-CN@MOF foam. • g-CN@MOF can detect ofloxacin residues in milk through smartphone-assisted color recognition. Ofloxacin (OFL) is widely used in medicine and animal husbandry, and its residues in milk raise substantial food-safety concerns. Herein, a dual-functional covalently coupled g-C 3 N 4 @Zn/Eu-MOF composite (g-CN@MOF) was constructed through a one-pot hydrothermal route. FTIR and XPS analyses indicated the formation of C N C O linkages between g-C 3 N 4 and the MOF, yielding an interfacially coupled type-II heterojunction that promoted charge separation. The optimized g-CN@MOF-30 achieved 69.21% removal of 10 mg L −1 OFL within 120 min under visible light, with •O 2 − and •OH identified as the dominant reactive species. Meanwhile, the fluorescence intensity ratio F 440 /F 595 showed a linear response to OFL over the range of 0–100 μM, affording a detection limit of 0.011 μM through an IFE-dominated ratiometric sensing mechanism. After immobilization in sodium alginate foam, the composite exhibited convenient recyclability and enabled OFL removal from pretreated milk samples, while smartphone-based RGB analysis provided rapid visual semi-quantification with recoveries ranging from 100.3% to 109.9%. Download: Download high-res image (269KB) Download: Download full-size image
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