Journal of Computational and Theoretical Nanoscience
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2017
·Vol. 14
·期 7
·3203-3208
·
IF 0
Tang Zhuxing,Lu Guangming,Ai Meimei
With hydrothermal method synthesized Fe3O4@PDA@MOF-199 magnetic nano-materials and the materials were characterized through scanning electron microscopy, energy spectrum diagram, fourier infrared and vibrating sample magnetometer. Metal organic framework materials
has a large surface area and a good adsorption for heavy metal ions, and the magnetic nanomaterial was separated easily via a magnet from a solution. The optimal condition: material consumption of 5 mg, shock time for 1 h, pH = 5 and under the condition saturated adsorption amount of Fe3O4@PDA@MOF-199
magnetic nanomaterials to Pb2+ was 539 mg g−1. And using 0.1 mol L−1 EDTA solution as eluent to desorb the saturated Fe3O4@PDA@MOF-199 magnetic nanomaterials, the elution rate can reach 89.44%. In this paper, Fe3O4@PDA@MOF-199
magnetic nanomaterials were used to absord Pb2+ in actual sample.
研究领域:
材料科学
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环境科学
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DOI
RSC Advances
·
2020
·Vol. 10
·期 14
·8286-8290
·
IF 3.119
Xiaochuan Xu,Haipeng Zhang,Bin Liu,Jianhui Yang
In this work, corolla-shaped gold nanostructures with (110) planes were successfully synthesized using ethylenediaminetetraacetic acid (EDTA) and polyvinylpyrrolidone (PVP) as the co-reductants and shape-directing agents. The structure and the mechanism of the nanostructures were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical characterization. On the basis that surface energies of different gold crystallographic planes are in the order γ(111) < γ(100) < γ(110), the (110) plane has the highest surface energy among the low-index planes. The gold nanocrystals with exposed high-energy planes are important in facilitating their potential applications such as highly efficient catalysts. This research is of great significance for the subsequent work on the synthesis of nanocrystals dominated by high-energy crystal planes.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Hao Hu,Lei Xue,Yelin Yao,Linlong Deng,Haibin Wang
A novel fluorescent probe, WH , was successfully designed and synthesized. WH demonstrated continuous detection capabilities for Cu 2+ and EDTA in the HEPES system. Specifically, the introduction of copper ions resulted in fluorescence quenching, while the addition of EDTA led to the recovery of fluorescence. The detection limits of WH for Cu 2+ and EDTA were calculated to be 29.66 and 172.13 nmol· L −1 , respectively. Moreover, WH exhibited AIE property in THF/H 2 O system. According to the Job's plot, 1 H NMR titration and mass spectrometry, WH could form a complex with Cu 2+ in a 1:1 ratio, and the combinding constant was 8.2 × 10 3 L mol −1 . WH exhibited outstanding selectivity, high sensitivity, large Stokes shift and strong anti-interference ability. Furthermore, WH had been successfully applied in the detection of Cu 2+ in beer and red wine, showcasing its promising potential for practical application.
研究领域:
分析化学
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材料科学
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环境科学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2023
·
IF 3.8
Pengfei Liu,Wenqiao Du,Xiangjing Liu,Long Zhang,Zhimin Chen
Common strategies for catalytic graphitization of biochar into graphitic porous carbon (GPC) still face great challenges, such as the realization of simple procedures, energy conservation, and green processes. Controlling over the graphitization degree and pore structure of biochar is the key to its structural diversification. Herein, a clean and energy-efficient method is developed to synthesize adjustable graphitic degree and structure porosity GPC from rice husk-based carbon (RHC) at a relatively low temperature of 800–1000 °C with environment-benign organometallic catalyst EDTA-iron and the recovery ratio of catalyst is as high as 97%. The formed by the organic ligands of EDTA-iron facilitates the etching of RHC surface and pore by iron, resulting in highly graphitized and developed porous GPCs. The pore structure and graphitization degree of GPCs can be adjusted by altering the catalyst loading, temperature, and holding time. The catalyst EDTA-iron with a lower concentration mainly plays the role of etching, which promotes the formation of porous carbon with larger surface area ( S BET =1187.2 m 2 ·g –1 ). The catalyst with higher concentration mainly plays the role of catalyzing graphitization and promotes the obtaining of graphitic carbon with high graphitization degree ( I D / I G =0.19). The mechanism of EDTA-iron catalyzed graphitization of RHC is explored by the comprehensive analysis of BET, XRD, Raman, TEM and TGA. This research not only provides an efficient method for the preparation of high-quality biomass-based graphite carbon, but also provides a feasible method for the preparation of biomass-based porous carbon.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Water
·
2017
·Vol. 9
·期 5
·326
·
IF 1.832
Ting Zhang,Jian He,Xingzhang Luo
Due to the fact that not all eutrophic lakes have cyanobacteria blooms, we hypothesized Fe may be another important limiting factor which regulates cyanobacteria bloom formation. We tested the hypothesis by batch cultures of bloom-forming Cyanobacterium,Microcystis aeruginosawith different ethylenediaminetetraacetic acid (EDTA)-Fe concentrations (0.5–6.0 mg/L), three levels of initial biomass, and excessive N and P (N = 4.2 mg/L, P = 0.186 mg/L) to simulate dynamically a cyanobacteria bloom in eutrophic conditions. The effect of EDTA and Fe uptake kinetics byM. aeruginosawere also examined. Results showedM. aeruginosagrowth rate positively correlated with EDTA-Fe concentration and negatively correlated with biomass. Maximal biomass ofM. aeruginosawas determined by Fe availability and initial biomass. EDTA could decrease both Fe availability and toxicity. Based on experimental results, a conceptual model of how Fe availability regulates cyanobacterial biomass in eutrophic lakes was developed. This study demonstrated bioavailable Fe is a potential limiting factor in eutrophic lakes that should be included in eutrophication management strategies.Keywords:Microcystis;eutrophication control;freshwater;Fe availability
研究领域:
环境科学
·
生态学
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DOI
高影响因子
Methods and Applications in Fluorescence
·
2022
·Vol. 11
·期 1
·015001
·
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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DOI
高影响因子
International Journal of Environmental Science and Technology
·
2017
·Vol. 15
·期 2
·385-394
·
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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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
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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DOI
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
·
核医学
·
肾脏生理学
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DOI
PubMed
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2021
·Vol. 328
·期 3
·991-1000
·
IF 1.371
Cai Jialing,Feng Jiahui,Li Jiahui,Feng Yu,Liu Fuping,He Feifang,Yu Haoqi,Zhang Zimin,Hu Yanqin,Hua Rong
This paper characterized the microstructure and physical properties of the scale from a uranium mine in Xinjiang by SEM, XRD and FT-IR. Based on the orthogonal experiment design, the formula of HClO 4 : EDTA: (NaF + HNO 3 ) = 4:1:5 is selected. The results show that the scale remover has the functions of dissolution, lattice damage and dispersion. The selected collaborative scale removal method can effectively remove the scale in the uranium mining process and has certain application value.
研究领域:
化学工程
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环境科学
·
材料科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
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
·
材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
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
·
材料化学
·
催化
·
纳米技术
·
污染控制
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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）