Methods and Applications in Fluorescence
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2022
·Vol. 11
·期 1
·015001
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IF 3.849
Lindan Gong,Lixiao Zhang,Rui Shen,Lin Zhang,Hengyuan Wang,Lu-an Fan
A novel ionic conjugated polymer fluorescent probe (IP) containing fluorenyls and imines was synthesized through a simple condensation method for the rapid detection of Cu2+. The probe exhibited a selective quenching response toward Cu2+ over other common metal ions in phosphate-buffered saline (PBS) at a pH of 7. Moreover, the fluorescence intensity of IP was linearly proportional to the concentration of Cu2+ when it ranged from 1 to 10 μM, and the limit of detection for Cu2+ was 0.45 μM. Furthermore, the quenched fluorescence of IP by Cu2+ was recovered after adding amino acids or ethylenediaminetetraacetic acid (EDTA), indicating that the probe could be recycled and is promising to reduce the detection cost of Cu2+ in real samples.
研究领域:
分析化学
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材料科学
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高影响因子
International Journal of Environmental Science and Technology
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2017
·Vol. 15
·期 2
·385-394
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IF 1.915
Zhuang S. T.,Yin Y. N.,Wang J. L.
Abstract In this paper, we modified chitosan beads in order to simultaneously detect and adsorb Co 2+ from aqueous solution. Firstly, 4-(5-chloro-2-pyridylazo)-1,3-phenylenediamine (5-Cl-PADAB) was used as selective probe for Co 2+ with color changing from yellow to pink, and the UV–Vis spectra showed that the λ
max changed from 439 to 504 nm. Then a novel biomaterial was synthesized with 5-Cl-PADAB (metal indicator), chitosan (biosorbent) and EDTA anhydride (cross-linker and chelating agent). The analysis of Fourier transform infrared and energy-dispersive X-ray spectra proved that 5-Cl-PADAB and EDTA were successfully connected to chitosan. The modified chitosan bead was selective probe for Co 2+ with a remarkable color change from white to pink, and the UV–Vis spectra showed that the λ
max changed from 441 to 459 nm. The adsorption of cobalt ions onto the modified chitosan beads followed pseudo-second-order ( R
2 = 0.99) kinetics and the Langmuir isotherm model ( R
2 = 0.80). Comparing with chitosan beads, the q
e of the modified one increased from 2.00 to 7.97 mg/g. The modified chitosan beads are promising biomaterial for simultaneous detection and removal of Co 2+ from aqueous solution. Graphical Abstract
研究领域:
环境科学
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材料科学
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生物化学
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SENSORS AND ACTUATORS B-CHEMICAL
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2017
·
IF 5.401
Na Wang,Ying Liu,Yuhang Li,Qin Liu,Minqian Xie
In this paper, we propose a fluorescent and colorimetric sensor for Cu 2+ ion based on formaldehyde modified hyperbranched polyethylenimine capped gold nanoparticles (F-hPEI Au NPs). The fluorescent sensor is prepared by one-pot synthesis, of which the fluorescence intensity could be quenched by Cu 2+ ion. The response behavior of the sensor is dependent on the pH value of the solution. At pH 4.0, the sensor exhibits a linear response for Cu 2+ ion over a wide concentration range of 0.15 μM–23 μM. The detection limit for the sensor is estimated to be 77 nM (S/N = 3), and the precision for five replication detections of 2.0 μM Cu 2+ ion is 4.7% (relative standard deviation). Both the color and fluorescence intensity of the sensor change obviously and could be observed with the naked eyes when there is continuous addition of Cu 2+ ion. The fluorescence intensity of quenched sensor could be recovered by EDTA, which provides a potential method to regenerate the sensor. Furthermore, the sensor shows satisfying reliability and accuracy in practical Cu 2+ ion detection applications.
研究领域:
分析化学
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材料科学
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高影响因子
American Journal of Nuclear Medicine and Molecular Imaging
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2022
·
IF 0
Ying Ding,Du Zhang,Min Wang,Li Zhang,Yu Liu,Yinqian Deng,Dawei Jiang,Yuqing Liu,Wei Cao
Positron emission tomography (PET) can accurately locate and quantify radioactivity over traditional single photon emission computed tomography (SPECT), encouraging its application in kidney function evaluation and glomerular filtration rate (GFR) measurement. 68 Ga-ethylenediamine-tetraacetic acid ( 68 Ga-EDTA) is a novel PET tracer for renal scan but a mature GFR calculation method still pending establishment. Herein, we aim to investigate the imaging performance of 68 Ga-EDTA dynamic PET in healthy C57BL/6 mice, establish quantitative methods to calculate GFR, and evaluate its feasibility in mice with kidney dysfunction. Dynamic PET of 68 Ga-EDTA successfully visualized the whole process of tracer elimination. GFR values were measured by the integral method (253.80±40.11 μL/min) and the Patlak Plot method (22.69±9.75 μL/min), while blood clearance rate of the tracer was found at 787.46±70.86 μL/min. The PET-based GFR values correlate well with the GFR blood (R 2 =0.7468, R 2 =0.8793). The Integral method provides better accuracy than Patlak Plot method. Further application of GFR measurement in kidney-diseased mice proves better performance of the Integral method for defining split renal function.
研究领域:
医学成像
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核医学
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肾脏生理学
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PubMed
ACS Sustainable Chemistry & Engineering
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2026
·
IF 7.6
Guixin Zhang,Yaxin Lu,Youguo Huang,Baoliang Lu,Ling Wang,Yuxiang Zhou,Xiao Liang,Hongqiang Wang,Zhaoling Ma
Aqueous zinc-ion batteries (AZIBs) hold great promise for sustainable energy storage, yet their practical viability is constrained by Zn dendrites and water-induced parasitic reactions. However, conventional additives generally address only one of these issues and lack dynamic interfacial regulation, failing to achieve the long-term stability of the Zn anode. Herein, we introduce a transformative-type additive Cu–EDTA that dynamically evolves into two functional cooperative species: a CuZn5 alloy and Zn–EDTA adsorbates. The electrochemically formed CuZn5 alloy induces the growth of the Zn(101) texture, thus suppressing Zn dendrites. The spontaneously formed Zn–EDTA adsorbates construct a poor water, which can effectively exclude H2O from the electrode/electrolyte interface, preventing the adverse water–parasitic reactions. In the Zn//Zn symmetrical batteries, the Cu–EDTA additive realizes an ultralong cycling stability over 10,000 h at 2 mA cm–2/1 mAh cm–2. An ultrahigh reversibility with an average Coulombic efficiency of 99.96% is achieved in the Zn//Cu asymmetrical battery. The Zn//MnO2 cell retains stable operation over 10,000 cycles at 5 A g–1. This work gives a simple transformative additive paradigm for the comprehensive solution of stabilizing the Zn anodes in the practical development of AZIBs.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Chunhua Li,Xiaoyu Hu,Zhenghao Chen,Zilun Ding
The excessive use of imidacloprid (IMD) poses a severe threat to human health and ecological stability. This study uniformly anchors MOF808 to the edges of Zn 3 In 2 S 6 nanosheets with sulfur vacancies by introducing EDTA ligands onto MOF808, successfully constructing a MOF808-EDTA/S-Zn 3 In 2 S 6 (MEZ) Z-scheme heterojunction for the efficient degradation of IMD. The presence of sulfur vacancies and interfacial In-O bonds in MEZ facilitates the enrichment of electrons on the S-Zn 3 In 2 S 6 side, thereby enhancing its ability to adsorb and activate oxygen and endowing MEZ with excellent photocatalytic activity. The optimized MEZ achieves a degradation rate of 98.4 % for IMD, with rate constants 5.0 and 76 times higher than those of S-Zn 3 In 2 S 6 and MOF808, respectively. After five photocatalytic cycles, MEZ still retains over 90 % photocatalytic activity, demonstrating the excellent stability of the surface catalyst, which can be successfully applied to the degradation of IMD in actual water. Singlet oxygen, superoxide radicals, and hydroxyl radicals preferentially attack the C7, C9, and N14 sites of IMD, leading to hydroxylation, denitration, ring-opening reactions, and dealkylation. These reactions decompose IMD into smaller products and significantly reduce IMD’s environmental risks. This study proposes an effective strategy to regulate the distribution of metal–organic frameworks on semiconductor surfaces and offers new insights for rationally developing Z-scheme photocatalysts to remove emerging pollutants in environmental remediation.
研究领域:
环境科学
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材料化学
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催化
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纳米技术
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污染控制
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高影响因子
Analytical Methods
·
2017
·Vol. 9
·期 17
·2553-2560
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IF 1.9
Lei Meng,Yaqing Yuan,Guang Pu,Na Xu
Highly blue luminescent and water-soluble silicon nanoparticles (Si NPs) are prepared by an efficient one-pot hydrothermal route from (3-aminopropyl) trimethoxysilane and ascorbic acid at 160 °C. The label-free Si NPs are demonstrated as an effective fluorescent probe for selective recognition of Mn2+. The linear range is from 2.5 to 250 μM and the detection limit is calculated to be 1.1 μM due to Mn2+ induced Si NP aggregation (turn-off). Additionally, the quenched fluorescence can be restored in the presence of EDTA because the EDTA can grab Mn2+ from the aggregated Si NPs–Mn2+ system owing to its strong chelating ability (turn-on). This sensing system based on the “on–off–on” fluorescence switching method can facilitate further development in Mn2+ detection.
研究领域:
分析化学
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纳米材料科学
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环境监测
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高影响因子
Journal of Water Process Engineering
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2026
·
IF 6.6
Xinyu Tang,Liangquan Lu,Hua Zhang,Xiaojie Sun,Bin Dong,Mingxin Bin,Jianhong Bi,Pengfei Yang
A magnetic Fe 3 O 4 -EDTA@Zr-MOF composite was successfully synthesized and characterized. • The maximum adsorption capacity for chlortetracycline reached 268.10 mg/g. • The adsorbent retained around 80% removal efficiency after six regeneration cycles. The long-term accumulation and serious pollution of chlortetracycline in the environment have emerged as a global pollution concern, posing a serious threat to ecosystems and public health. To overcome the limitations of traditional adsorbents, including low adsorption capacity, poor selectivity and limited regenerative properties, this study synthesized a composite material Fe 3 O 4 -EDTA@Zr-MOF that combines magnetic separation and ligand functionality by the hydrothermal method for CTC adsorption. Successful synthesis was verified by structural characterization, including FTIR and XRD. The adsorption kinetics were well described by the PSO model, suggesting that active-site-controlled surface interactions played an important role in CTC uptake. Thermodynamic analysis showed ΔG 0 < 0 and ΔH 0 > 0, indicating a spontaneous and endothermic process. The adsorption isotherms fitted the Langmuir model well, with a maximum theoretical capacity (q max ) of 268.10 mg/g. Circulation experiments show that the adsorption capacity of the material was still around 80% after 6 cycles. Fe 3 O 4 -EDTA@Zr-MOF combines high adsorption efficiency with easy magnetic recovery and good reusability, providing a potential solution for the treatment of tetracycline antibiotics in aquatic environments. Download: Download high-res image (122KB) Download: Download full-size image
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ACS ES&T Water
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2023
·
IF 5.3
Ming Liu,Hua Zou,Penghui Shao,Hao Jia,Guoshuai Liu
The presence of metals and complexing agents in wastewater poses serious threats to public health and aquatic ecosystems. Electrochemically advanced oxidation processes can break down heavy metal compounds, but recovering these metals at the cathode presents challenges. To address this concern, we explore amidoxime, known for its high complexation capacity and hydrophilicity, as a cathodic microenvironment modifier to enhance heavy metal adsorption and immobilization. We develop a novel carbon felt (CF) amidoxime-functionalized group (CFAG) cathode for cathodic nickel recovery from Ni–EDTA. Experimental results show a significant improvement in nickel recovery efficiency with amidoxime functionalization. Specifically, CFAG outperforms CF by 2 times, driven by nickel recovery reaction kinetic constants of 0.0202 min–1 for CFAG and 0.0101 min–1 for CF. Furthermore, cycling and desorption experimental results have validated the enduring stability and regenerative attributes of the CFAG electrode, and the density functional theory calculations confirm that nickel binds more effectively to amidoxime groups than conventional polymer groups on CF. This study presents a promising electrochemical approach for recycling metals in complex heavy metal wastewater, making metal resource recovery more economical and efficient.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yunzhe Jiang,Chuanyao Liu,Aisheng Huang
The removal of heavy-metal ions from wastewater has drawn intense attention, because of their toxicity, bioaccumulation tendency, and persistency in nature. Adsorption is regarded as one of the most promising methods, because of its simplicity and efficiency. In the present work, we report the preparation of a novel EDTA-functionalized covalent organic framework (COF) for the removal of heavy-metal ions. First, a COF named TpPa-NO2 was reduced to TpPa-NH2 by using Na2S2O4 as a reductant, and then EDTA dianhydride was grafted onto TpPa-NH2 to obtain TpPa-NH2@EDTA through post-modification. Both the COF morphology and structure remained unchanged after post-modification. The TpPa-NH2@EDTA showed excellent performance in adsorbing different types of heavy-metal ions, such as soft Lewis acid (Ag+, Pd2+), hard Lewis acid (Fe3+, Cr3+), and borderline Lewis acid (Cu2+, Ni2+), and the removal efficiencies are all >85% within 5 min, because of the strong chelation effect of EDTA. The TpPa-NH2@EDTA also showed high adsorption ability in a pH ≥3 environment and have an adsorption capacity of >50 mg/g for the six representative heavy-metal ions. This work provides a new idea for the application of COF materials in the removal of heavy-metal ions from wastewater.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wufeng Liu,Quanhua Xie,Tianlu Chen,Lu Ran,Zilin Nie,Yang Liu,Yuanyuan He,Haixing Chang,Najmeh Zare,Hassan Karimi-Maleh,Nianbing Zhong,Tejraj M. Aminabhavi
Photocatalytic optical hollow fibers (POHFs) coupled with spiral-shaped Cl − adsorption fibers are used to remove trichloroethylene (TCE) from wastewater. The POHFs are hollow quartz tubes coated with Ti 3 C 2 T x -doped oxygen vacancy (OV)-rich BiOBr (BiOBr-OV). The photocatalyst coating enhanced the excitation light intensity onto the photocatalytic fiber surface. The hetero-junction between Ti 3 C 2 T x and BiOBr-OV reduced the bandgap and broadened spectral absorption range of the composite photocatalyst. The material increased the production of reactive · O 2 - and •OH species, thereby improving the degradation of TCE. Spiral-shaped Cl − adsorption fibers comprised of polyethersulfone loaded with ethylenediaminetetraacetic acid-grafted metal–organic framework (MOF-808-EDTA). Tertiary amine groups (−R 3 N) of MOF-808-EDTA exhibited superior Cl − adsorption capabilities. As the Cl − ion indirectly quenches the free radicals, its removal reduced the inhibitory effect of the photocatalytic products, further enhancing the efficiency of TCE degradation and removing its degraded byproducts. TCE, chemical oxygen demand, and Cl − ion removal rates are 98.75, 69.15, and 99.22 %, respectively. Intimate coupling of photocatalysis and ion adsorption provided an effective solution for efficient removal of TCE, its degradation products, and Cl − ions from wastewater.
研究领域:
环境科学
·
材料科学
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高影响因子
Surfaces and Interfaces
·
2021
·
IF 4.837
Zhihua Zhu,Jianle Wang,Xueqiang Liu,Le Yuan,Xueming Liu,Hong Deng
The soil washing technology of heavy metals in soil has the prospect of practical application. In this study, we screening out the best washing conditions for remediation of heavy metal contaminated soil and the conclusions are verified by pilot-scale field tests. Compared with citric acid (CA) and ethylene diamine teraacetic acid disodium salt (EDTA), Iron-based compounds (IC) has highest removal rate of heavy metals in soil. Heavy metals are mainly concentrated in soil with small particle size. Comprehensive cost consideration, the best washing concentration is 0.06 mol·L −1 , the best solid liquid ratio is 1:5 and the best washing time is 30 min. CaO can precipitate heavy metals in washing waste liquor by increasing the pH of heavy metals in washing waste liquor, and the best precipitation time is 30 min considering the comprehensive cost. The results of pilot scale experiments show that the IC washing technology was shown to be an effective approach to rapidly reduce the Pb, Zn and As in contaminated soil.
研究领域:
环境科学
·
土壤修复
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高影响因子
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