SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Xin Li,Liuxi Zhao,Yuhan Wu,Ao Zhou,Xuanfeng Jiang,Yuan Zhan,Zhengguang Sun
Carbon dots have been widely focused on the field of metal ion detection due to their excellent optical property. Herein, novel orange fluorescent nitrogen and boron co-doped carbon dots (NB-CDs) are obtained by one-pot solvothermal using p-phenylenediamine and boric acid as raw materials. The NB-CDs exhibit excitation-independent emissions and the maximum emission wavelength is 597 nm at 420 nm excitation. The fluorescence can be quenched by Ce 4+ effectively and selectively, and the detection range of Ce 4+ is gained from 0.14 to 180 μM with a detection limit of as low as 0.14 μM. Furthermore, Al 3+ can also recombine with NB-CDs surface functional groups, which shows a detection range from 1.07 to 100 μM and a detection limit of as low as 1.07 μM, accompanied with a blue-shift to 527 nm.
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PubMed
高影响因子
LUMINESCENCE
·
2020
·Vol. 35
·期 8
·1277-1285
·
IF 1.855
Feifei Zhao,Tianyi Zhang,Yu Yang,Changli Lü
Carbon dots (CDs) have drawn increasing interests due to their unique optical properties and promising application in various fields. In this study, citric acid (CA) and 5-chloromethyl-8-hydroxyquinoline (LQ) were used to synthesize nitrogen-doped CDs as novel fluorescent probes using a one-step solvothermal route. The as-prepared CDs had strong blue-white fluorescence emission when excited at 405 nm wavelength with a quantum yield (QY) of 25%, behaving with high ion concentration stability. Water-soluble CDs with a 8-hydroxyquinoline structure on their surface could be used to detect Al 3+ using a ‘turn on’ mechanism and trinitrophenol (TNP) using a ‘turn off’ mechanism with detection limits of 229 nM and 44.4 nM, respectively. Al 3+ enhances the fluorescence of CDs by forming a coordination complex to generate a fluorescence synergistic role and limit CD nonradiative transition. TNP quenched the fluorescence with high selectivity and sensitivity, which was attributed to the inner filter effect and static quenching. These results indicated that these CDs with their unique ‘turn on’ and ‘turn off’ nature have potential application in the environmental protection field and in prevention of terrorist threats.
研究领域:
材料科学
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分析化学
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环境科学
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纳米技术
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Quanlong Liu,Lei Zhang,Yanxia Zhang,Jiaqi Zhang,Xiurong Feng,Yan Liu,Zhehong Tang,Jieyu Chen,Fei Guo,Yunpeng Zhou
Al 3+ doping realizes controllable lattice distortion and regulated defect dipole construction. • The synergistic effect greatly boosts polarization difference while maintaining excellent relaxor characteristics. • The x = 0.4 film delivers a superior recoverable energy density of 56 J/cm 3 and a high efficiency of 80% at 1500 kV/cm. • The x = 0.4 film exhibits excellent thermal stability, favorable frequency stability and ultrafast discharge performance. High-performance lead-free Aurivillius ferroelectric films with superior energy density and fast charge/discharge capability under low-to-moderate electric fields are highly demanded for pulsed power and electronic systems. Herein, CaBi 3 LaTi 4-3 x /4 Al x O 15 films were successfully grown on Pt/Ti/SiO 2 /Si (100) substrates via a sol-gel method. Al 3+ doping introduces controllable lattice distortion and defect dipoles, which synergistically optimize the polarization difference and maintain excellent relaxor behavior in the films. At 1500 kV/cm, the optimal film with x = 0.4 achieves a prominent W rec of 56.0 J/cm 3 coupled with an η of 80%, owing to the balanced lattice distortion, an appropriate defect dipole density and suppressed leakage current. Meanwhile, the x = 0.4 film possesses excellent thermal and frequency stability, as well as an ultrafast discharge response. It also exhibits comparable energy storage capabilities at low-to-medium electric fields relative to previously reported dielectric films. This study provides a reliable pathway to enhance the energy storage performance of bismuth layer-structured ferroelectrics through synergistic modulation of lattice distortion and defect dipoles, which facilitates their practical applications in complex-environment energy storage devices operated at low-to-moderate electric fields.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Kezhen Zhang,Xiaoyong Tian,Peipei Xu,Yan Zhu,Shanyi Guang,Hongyao Xu
A novel rhodamine-based multi-ion fluorescent sensor, RGN, was designed and synthesized for the highly selective detection of mercury ions (Hg 2+ ) in ethanol and water systems, as well as trivalent cations (Fe 3+ , Al 3+ , and Cr 3+ ) in acetonitrile and water systems using a two-step Schiff base reaction method. Nuclear magnetic titration experiments and theoretical calculations demonstrated that the sensor achieved the detection of the aforementioned metal ions through the fluorescence turn-on phenomenon induced by lactam ring-opening. Density functional theory (DFT) calculation results showed decreased HOMO-LUMO energy gaps and increased dipole moments, indicating the effective coordination of the sensor with the corresponding metal ions to form more stable complexes, thereby achieving detection objectives. Furthermore, the fluorescence turn-on sensor RGN exhibited relatively low detection limits, with limits of detection (LOD) for Fe 3+ , Al 3+ , Cr 3+ , and Hg 2+ being 10.20 nM, 14.66 nM, 58.78 nM, and 73.33 nM, respectively. Finally, practical applications of sensor RGN in environmental water samples, L929 cells, and zebrafish were demonstrated, indicating its potential for detecting and tracking Fe 3+ , Al 3+ , Cr 3+ , and Hg 2+ in environmental samples and biological systems, with prospects for biomedical applications in the diagnosis and treatment of heavy metal ion-induced diseases.
研究领域:
分析化学
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生物医学工程
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环境科学
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Shuyang Shi,Baozhong Ma,Shuang Shao,Yongqiang Chen,Chengyan Wang
An original technology named HNO3 pressure leaching has been proposed by our team to leach Al from coal gangue and fly ash. Although the preliminary separation of Al and Fe had been achieved during leaching, a small amount of Fe impurity was still unavoidably dissolved into the leach liquor. To obtain pure Al2O3 during subsequent pyrolysis, it is imperative to synchronously remove Fe3+ during the crystallization of Al(NO3)3·9H2O. Herein, the phase equilibria of the Al(NO3)3–Fe(NO3)3–H2O(−HNO3) system at 25–40 °C and 0–8.12 mol kg–1 of HNO3 molality were investigated. The results indicated that the ternary system was a simple cosaturated type consisting of an immutable point, two univariate curves, and two crystallization regions. Notably, the solubility and crystallization region of Al(NO3)3·9H2O were barely impacted by acidity, while the opposite was true for Fe(NO3)3·9H2O. This finding was instructive for the crystallization of Fe(NO3)3·9H2O from the liquor with high Fe and low Al. Moreover, a high crystallization yield could be obtained at low temperatures. Finally, an appropriate crystallization procedure was provided. This study is expected to provide basic data and theoretical support for the crystallization and separation of mixed nitrates containing Al and Fe.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Rui Dang,Xiang-Rong Ma,Yun-Peng Zhao,Menjiao Ren,Wei Guo,Yu-Hong Kang,Yong Gao,Shiqing Bi,Wenwen Gao,Hua-Rui Hao,Rui Bai,Yu-Fei Wang,LongYan,Liguo Gao,Zhi-Fang Zhang,Ya-Jun Ma,Xian-Yong Wei
The construction of three-dimensional (3D) Ni 2+ -Al 3+ -LDH / γ-Fe 2 O 3 - Cd 2+ -Ni 2+ -Fe 3+ -layered double hydroxide (LDH) structures (S1–S6) with magnetic properties and different (γ-Fe 2 O 3 - Cd 2+ -Ni 2+ -Fe 3+ -LDH)/(Ni 2+ -Al 3+ -LDH) ratios were successfully prepared. The effects of these ratios in these 3D LDH constructions on physicochemical properties were investigated using XRD, SEM, VSM, UV–vis, and BET analyses. The specific surface area and band gap of these materials decreased with increased ratio, while the saturation magnetization increased. The synergistic combination of saturation magnetization, adsorption characteristics, and band gap of six sample types were evaluated. S3 samples were used in a multistage recycling treatment study of dye wastewater and fluoride ion (F − )-containing wastewater, effectively degrading methyl orange (MO) due to its high photocatalytic activity. After this, the memory effect of the calcined product (S3, 300 °C) significantly enhanced the migration and diffusion of F − , resulting in a F − adsorption capacity of 49.25 mg/g. The recycling properties of this composite material for photocatalytic degradation and adsorption capabilities for F − removal were evaluated, showing a reduction in efficiency of only 1 % and 8.6 % for degradation of MO and F − removal respectively, with no significant loss of efficiency after 10 cycles. Adsorption experiments and subsequent sample characterization showed that the F − adsorption mechanism of S3 involved ion exchange mechanism and sorption sites (interlayer, basal, edges and junction sites). The existence of oxygen vacancies and formation of S-scheme heterojunction between γ-Fe 2 O 3 -Cd 2+ -Ni 2+ -Fe 3+ -LDH and Ni 2+ -Al 3+ -LDH, resulted in the improvement of the photocatalytic activity. The results obtained in this study demonstrated that Ni 2+ -Al 3+ -LDH/γ-Fe 2 O 3 - Cd 2+ -Ni 2+ -Fe 3+ -LDH composites were a promising adsorbent for degradation of MO and F − removal in practical multilevel utilization due to its simple synthesis, low-cost, recyclability, and high removal capability.
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高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Jinwei Tian,Yao Wei,Chengwei Lü
To achieve the development of fluorescence turn-on probe and dual detection of Al 3+ and Fe 3+ , three organic molecules (named KN , KP and KS ) were synthesized based on quinolinone, Schiff base, 1,3,4-thiadiazole or benzothiazole units. Their fluorescence characteristics and response mechanism were investigated thoroughly. The recognition process created obvious color change under sunlight and nearly 30 to 66 folds fluorescence enhancement under ultraviolet light. The formation of stable complexes leads to inhibition of intramolecular charge transfer, restriction of imine isomerization and consequent optical behaviors. For KN , Al 3+ and Fe 3+ could be distinguished via different UV–vis response or by using masking agent with detection limits of 0.18 μM and 0.20 μM, respectively. Another satisfactory result for distinguishing two ions was achieved with KS under pH = 2 or 10 condition. More importantly, KN and KS were successfully used to detect Al 3+ or Fe 3+ in foods, water samples and pharmaceutical products.
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高影响因子
Food Analytical Methods
·
2019
·Vol. 12
·期 8
·1736-1746
·
IF 2.413
Wu Yaqin,Wen Xiaoye,Fan Zhefeng
A novel fluorescent probe L was designed for rapid detection of Al 3+ with high selectivity in water-acetonitrile medium based on aggregation-induced emission (AIE). The recognition mechanism was investigated by fluorescence spectra, SEM, FI-IR, 1 H NMR, and mass spectra. The detection limit of Al 3+ was 5.3 × 10 −8 M. The recoveries were within the range of 84.5–103.3% and the relative standard deviation (RSD) values were within the range of 1.7–6.4%. The AIE behavior could be attributed to the J-aggregates formation and the chelation-enhanced fluorescence (CHEF) in water-acetonitrile medium. The probe L can be used to detect Al 3+ in food and environmental samples. What’s more interesting is that the L could detect intracellular Al 3+ in live cells by bioimaging.
研究领域:
分析化学
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食品安全
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生物成像
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环境监测
·
分子探针
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Qiuyu Chen,Jin Liu,Bo Zhao,Xiaoyan Meng,Yu He,Zian Lin
A stable Cu-based MCOFs with outstanding laccase-mimicking nanozyme activity was synthesized. • Steady-state kinetic assays verify the superior substrate affinity and faster catalytic rate of Cu₃-TAPT COF. • A two signal-reading-mode colorimetric sensor was constructed for detection of Cr 3+ and Al 3+ . • The sensing platform can be successfully applied for real water samples. Cr 3+ and Al 3+ are toxic metal ions widely existing in environmental water, and traditional detection methods cannot meet the demand for on-site analysis. Metal covalent organic frameworks (MCOFs) are promising nanozyme candidates, which overcome the defects of conventional nanozymes by virtue of ordered structure, good stability and uniformly distributed active sites. In this study, Cu 3 -TAPT COF, a typical MCOF nanozyme with high stability and excellent laccase-mimicking activity was fabricated. Relying on the differential inhibitory effects of Cr 3+ and Al 3+ on its catalytic activity, an inhibition-based colorimetric platform was established for their separate detection. This sensing system integrates naked-eye visible color variation, quantitative absorbance signal at 510 nm, and smartphone image capture for portable on-site readout. The method validation results demonstrated that the limits of detection (LODs) were 0.30 μM for Cr 3+ and 0.22 μM for Al 3+ . The overall recoveries of all spiked groups for the two ions in three actual water samples (river water, seawater, and lake water) ranged from 93.41% to 109.8%. This work validates the great potential of laccase-mimicking MCOF nanozymes in environmental monitoring and sheds new light on the fabrication and practical exploitation of MCOF-derived nanozymes. Download: Download high-res image (116KB) Download: Download full-size image
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JOURNAL OF FLUORESCENCE
·
2022
·Vol. 33
·期 1
·91-101
·
IF 2.525
Li Zhigang,Zhao Bing,Kan Wei,Bu Fanqiang,Qi Xin,Wang Liyan,Song Bo,Ding Limin
A reactive fluorescent “turn-on” probe ( di-PIP ) with imine-linked dual phenanthro[9,10- d ]imidazole luminophore have been conveniently prepared as an Al 3+ and H + dual functional receptor. di-PIP displayed high selectivity and sensitivity towards Al 3+ ion in DMF/HEPES accompanied by fluorescence blue-shift and a good linear relationship as well as a low detection limit of 30.5 nmol·L –1 , which can root from the synergetic functions of the decomposition reaction of di-PIP promoted by acidic Al 3+ and the coordination effect between decomposition product and Al 3+ . Intriguingly, it was found that hydrogen ion H + can be sufficient for simulating the fluorescence enhancing of di-PIP . 1 H NMR titration and MS analyses for elucidation of the intermediate structure further revealed that the acid-triggered decomposition reaction resulted in the rapid, and sensitive sensing to Al 3+ and H + . In addition, the probe di-PIP could be successfully applied to the detection of Al 3+ in real water samples, and also utilized to visualize Al 3+ and H + in the living cells.
研究领域:
分析化学
·
生物医学
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Miaomiao Chen,Meng Zhou,Yunyun Wang,Caihong Mao,Shujie Pang,Ting Meng,Xudong Yang
To address the challenges associated with the storage and application of traditional carbon dot (CDs) solutions, this study introduces a cyan fluorescent carbon dot-based hydrogel (CDs-SCH). The hydrogel was synthesized by integrating cyan fluorescent CDs, derived from penicillamine and m -phenylenediamine, with carboxymethylcellulose (CMC) and sodium alginate (SA), which was then mixed with acrylamide (AM). The resulting CDs-SCH hydrogel was extensively characterized, focusing on its morphology, chemical structure, and fluorescence behavior. The fluorescence intensity of the hydrogel was enhanced by 3.23 times compared to the original CDs. The fluorescence response of the CDs-SCH hydrogel to pH variations was examined, demonstrating its capability to visually monitor the freshness of aquatic products such as fish and shrimp. Furthermore, Al 3+ and Ag + ions were found to significantly modulate the fluorescence, with Al 3+ enhancing and Ag + quenching the fluorescence, displaying reliable detection limits and linearity. The hydrogel's ability to detect glutathione (GSH) via Ag + reduction to Ag was also explored. Additionally, the hydrogel exhibited stable Al 3+ adsorption, with the process following pseudo-second-order kinetics and the Langmuir adsorption model. As a versatile and responsive material, the CDs-SCH hydrogel holds potential for applications in intelligent food packaging and environmental ion detection.
研究领域:
材料科学
·
环境科学
·
食品科学
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PubMed
高影响因子
TALANTA
·
2016
·
IF 4.035
Haiyang Liu,Bibo Zhang,Chunyan Tan,Feng Liu,Jiakun Cao,Ying Tan,Yuyang Jiang
A simple Schiff base (BMSA) prepared from salicylaldehyde and 2-(1H-benzo[ d ]imidazol-2-yl)aniline was evaluated as an efficient fluorescent chemosensor for the selective recognition of Al 3+ and Cu 2+ over other common metal ions . This sensor could detect Al3 + in CH 3 OH/PBS with distinct emission red-shift (the detection limit 0.31 μM)and Cu 2+ in CH 3 OH/Tris-HCL (the detection limit 0.54 μM) with obvious fluorescence quenching . The obtained BMSA-Al 3+ and BMSA-Cu 2+ complexes could act as cascade sensors for detecting F − and S 2− , respectively. The recognizing behavior of BMSA toward Al 3+ and Cu 2+ has been investigated in detail through Job's Plot, FT-IR NMR , and HRMS analysis. Moreover, this chemosensor was verified to be of low cytotoxicity and good imaging characteristics for the detection of Al 3 + and Cu 2+ , and further for the recognition of F − and S 2− in living cells, suggesting that BMSA was proved to be a useful tool for tracking Al3 + /Cu 2+ and F − /S 2− ions in vivo .
研究领域:
生物化学
·
分析化学
·
细胞生物学
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高影响因子
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