JOURNAL OF CHROMATOGRAPHIC SCIENCE
·
2024
·
IF 1.5
Yang Shu-Tong,Cao Yi-Wen,Zeng Zi-Ying,Gang Zheng,Chen Min,Du Bing-Yan,Su Miao-Miao,Yang Zhong-Hua,Tang Zhu-Hua,Zeng Yun-Liu
In this work, a magnetic adsorption material based on metal–organic framework (Fe3O4@ZnAl-LDH@MIL-53(Al)) was synthesized and used as an adsorbent in the process of magnetic solid phase extraction. Then, a high-performance liquid chromatograph was used to quantitatively detect triazole fungicides in samples. In order to verify the successful preparation of the material, a series of characterization analyses were carried out. Besides, the key parameters that may affect the extraction efficiency have been optimized, and under optimal conditions the three triazole fungicides showed good linearity in the range of 10–1000 μg/L (R2 ≥ 0.9796); Limit of detections were ranged from 0.013 to 0.030 μg/mL. Finally, the established method was applied to the detection of triazole fungicides in four fresh juice samples. The results showed that the target analyte was not detected in all the test samples. By detecting the recoveries (73.3–104.3%) and coefficient variation (RSD ≤ 6.8%) of triazole fungicides in fortified samples, it proved that this established method meets the requirements of pesticide residue analysis and showed excellent application potential.
研究领域:
分析化学
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食品安全
·
农药残留分析
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PubMed
高影响因子
MOLECULES
·
2020
·Vol. 25
·期 4
·897
·
IF 3.267
Qian-Chun Zhang,Guang-Ping Xia,Jun-Yi Liang,Xiao-Lan Zhang,Li Jiang,Yu-Guo Zheng,Xing-Yi Wang
In this study, a novel monolithic capillary column based on a NH2-MIL-53(Al) metal–organic framework (MOF) incorporated in poly (3-acrylamidophenylboronic acid/methacrylic acid-co-ethylene glycol dimethacrylate) (poly (AAPBA/MAA-co-EGDMA)) was prepared using an in situ polymerization method. The characteristics of the MOF-polymer monolithic column were investigated by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffractometry, Brunauer-Emmett-Teller analysis, and thermogravimetric analysis. The prepared MOF-polymer monolithic column showed good permeability, high extraction efficiency, chemical stability, and good reproducibility. The MOF-polymer monolithic column was used for in-tube solid-phase microextraction (SPME) to efficiently adsorb trace sulfonamides from food samples. A novel method combining MOF-polymer-monolithic-column-based SPME with ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) was successfully developed. The linear range was from 0.015 to 25.0 µg/L, with low limits of detection of 1.3–4.7 ng/L and relative standard deviations (RSDs) of < 6.1%. Eight trace sulfonamides in fish and chicken samples were determined, with recoveries of the eight analytes ranging from 85.7% to 113% and acceptable RSDs of < 7.3%. These results demonstrate that the novel MOF-polymer-monolithic-column-based SPME coupled with UHPLC-MS/MS is a highly sensitive, practical, and convenient method for monitoring trace sulfonamides in food samples previously extracted with an adequate solvent.Keywords:monolithic capillary column;metal-organic framework;sulfonamides;solid-phase microextraction;ultra-high performance liquid chromatography-tandem mass spectrometry
研究领域:
分析化学
·
食品科学
·
材料科学
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高影响因子
TURKISH JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 4
·1281-1290
·
IF 1.151
WANG JI,WANG QINGYIN,WANG GONGYING
Poly(ethylene terephthalate) (PET) is one of the world's five major engineering plastics and is widely used in various fields. At present, the main catalysts used in the synthesis of PET are antimony, titanium, and aluminum metal compounds. Among them, antimony-based catalysts are poisonous and the titanium-based catalyst products are relatively yellow in hue. The aluminum-based catalyst has the advantages of low price and environmental friendliness, but current research shows that the organoaluminum catalyst has the problem of hydrolysis, and MIL-53 (Al) has good stability and will not affect the environment, so we add a catalyst before the esterification reaction, and uses thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscope (SEM), and N2 low-temperature physical adsorption characterizes the thermal stability and structure of MIL-53(Al). At the same time, the effects of different content, polycondensation time, before and after activation and polycondensation temperature on the properties of PET were investigated. The research results show that when the molar content of catalyst is 0.05% and the reaction temperature is 280 oC for 150 min, the product obtained is relatively excellent. The catalytic activity has almost no effect before and after activation, indicating that the polycondensation reaction is carried out on the surface of the catalyst. Therefore, MIL-53 (Al) has great potential in PET industrial catalysis.
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高影响因子
MEASUREMENT SCIENCE and TECHNOLOGY
·
2022
·Vol. 34
·期 2
·025106
·
IF 2.398
Qianchun Zhang,Qin Zhou,Yun Wu,Yanxin Li,Fengling Tian,Shan Tang,Li Jiang
In this study, MIL-53(Al) and Sb2SnO5 were synthesized by hydrothermal and precipitation methods, respectively. The doped MIL-53(Al)/Sb2SnO5 showed excellent catalytic properties, specifically for selectivity and sensitivity for isobutanol (IBN). To assess the catalytic properties of MIL-53(Al)/Sb2SnO5, an IBN gas sensor based on cataluminescence of MIL-53(Al)/Sb2SnO5 was developed, and it demonstrated detection of IBN with high sensitivity, high specificity, fast detection, and good stability. The signal response and recovery time of IBN gas sensor were 0.5 s and 6 s, respectively, and a good linear relation was 0.050–2.5 μg ml−1 (R2 = 0.9956) with a low detection limit of 0.015 μg ml−1. Further, the IBN sensor applied in the detection of real samples had satisfactory recoveries (90.0%–108%) with relative standard deviations of 3.2%–6.7%. The developed sensor based on MIL-53(Al)/Sb2SnO5 has great prospects for the practical detection of IBN gas in the fields of environmental analysis, safety monitoring, etc.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 23
·11158-11165
·
IF 3.925
Jipeng Li,Yanzhi Sun,Yongmei Chen,Yang Tang,Junqing Pan,Pingyu Wan
In the present study, the preparation of a new MOF material His-MIL-53(Al) and its performance in the adsorption of Pb(II) from aqueous solution were investigated. The original material MIL-53(Al) was directly grafted with histidine to obtain the modified MOF material His-MIL-53(Al). The results show that His-MIL-53(Al) has excellent adsorption performance for Pb(II), and the adsorption process is in accordance with the pseudo first-order kinetics and the Langmuir adsorption model, with a maximum adsorption capacity of 50.13 mg g−1, which is much larger than the adsorption capacity of the original material MIL-53(Al). The experimental results also show that the prepared material has good recoverability. Our work demonstrates the applications of His-MIL-53(Al) as a promising material in the adsorption of heavy metals.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 5
·e70833
·
IF 4.2
Jia-Min Wu,Wei-Hao Cai,Lin Guo,Zhi-Cong Luo,Guan-Xiao Ran,Zhi-Xiang Cai,Xiao-Feng Zeng,Zhao-Qing Li,Jing-Xian Zhang,Yu-Sheng Shi
Vat photopolymerization (VPP) has recently been applied to fabricate silicon nitride (Si 3 N 4 ) ceramics. To overcome limitations in Si 3 N 4 slurry curing performance, a multi-functional modification strategy utilizing the metal-organic framework MIL-53(Al) was proposed. The introduction of MIL-53(Al) simultaneously affects slurry photocuring performance and ceramic microstructural regulation. MIL-53(Al) serves as a fluorescent active filler acting as an in situ photon source under ultraviolet irradiation, thereby enhancing the curing depth by an average of 17.5 µm. During the debinding process, the decomposition of MIL-53(Al) leaves a pore structure and aluminum oxide that can assist sintering, facilitating phase transformation and forming a well-interlocked β-Si 3 N 4 microstructure. The sintered Si 3 N 4 ceramic exhibited a flexural strength of 269.2 ± 12.6 MPa, and a fracture toughness of 3.54 ± 0.21 MPa·m 1/2 at a porosity of 23.9%. This study demonstrates the multi-functional role of MOF-based additives for both enhancing slurry printability and tailoring ceramic microstructure in fabrication of porous Si 3 N 4 ceramics via VPP.
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Wuxiu Ding,Duo Sun,Lan Zhang,Hongyi Wang,Yang Zhao,Weiguo He,Zhigang Du,Yongyan Yan
Applying protective coatings to the surface of stone heritage is one of the most common methods for its preservation. To enhance the weathering resistance of the limestone heritages, MIL-53@FS, a hydrophobic metal-organic framework (MOF) composite, was prepared through fluorosilane modification of MIL-53-OH synthesized via a solvothermal method. Characterization analyses were conducted using SEM, XRD, TGA, and FTIR techniques. The results indicated that MIL-53@FS maintained its well-ordered framework structure and certain porosity, while forming a continuous and uniform hydrophobic coating, leading to a significant increase of water contact angle to 127.14° and enhanced thermal stability. It exhibited excellent corrosion resistance, anti-icing performance, and color compatibility in the application tests, holding a promising outlook for protecting limestone-based heritages.
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高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Dequan Jiang,Ting Wen,Yanzhen Guo,Jie Liang,Zimin Jiang,Chen Li,Ke Liu,Wenge Yang,Yonggang Wang
Anomalous compression behaviors such as negative linear compressibility (NLC) and negative area compressibility (NAC) are emerging functionalities essential for utilities under extreme conditions. Metal–organic frameworks (MOFs) present a large family of NLC/NAC materials under the well-recognized “wine-rack” mechanism. Nevertheless, the working pressure of MOFs is limited to typically no more than 3 GPa. Herein, we report the observation of a rare reentrant NLC behavior of MIL-53(Al) over an ultrawide pressure region up to 41.6 GPa. MIL-53(Al) with the classic wine-rack topology first exhibits an NLC behavior along the c-axis in the pressure region of 0–2.7 GPa, followed by a normal compression process between 2.7 and 12.9 GPa. After that, it is surprising to find that the reentrant NLC property remains at a record-high pressure (>40 GPa) among the previously reported MOFs. The mechanisms of the distinct compression behaviors of MIL-53(Al) in the three stages are studied by combining the X-ray diffraction analyses, Raman spectra, and DFT calculation. Particularly, the photoluminescence of Cr3+ is used as a unique probe for the subtle changes of the local coordination environments of Al3+ under compression. Both the absorption spectra and photoluminescence of Cr3+-doped MIL-53(Al) not only verify the three-stage compression processes but also reveal a hidden structural/electrical phase transition around 22.0 GPa. These findings provide an in-depth understanding of the structure–property relationship of abnormal compression behavior at the local-structure level.
研究领域:
材料科学
·
高压物理
·
无机化学
·
金属有机框架（MOFs）
·
凝聚态物理
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高影响因子
ANALYTICAL LETTERS
·
2020
·
IF 1.467
Meijuan Ren,Huan Wang,Yuanyuan Liu,Qin Ma,Wenjing Jia,Mingzhu Liu,Huiju Wang,Yongchang Lu
Amino-MIL-53(Al) nanosheets were synthesized by a hydrothermal reaction and were employed as a fluorescent probe because of their high quantum yield and excellent stability. The amino-MIL-53(Al) nanosheets have a maximum fluorescence emission peak at 435 nm using an excitation wavelength of 335 nm. The fluorescent intensity of luminophor at 435 nm was linearly quenched when mercury (II) (Hg2+) was added, which occurred due to the adsorption of Hg2+ onto the luminophor surface. Under these conditions, the fluorescent signal of the system is in the “turn-off” state. Following the addition of glutathione (GSH) into the system, the quenched fluorescence intensity may be partially restored based on the reaction between glutathione and Hg2+. In this condition, the fluorescent signal of the amino-MIL-53(Al)-Hg2+ system is in the “turn-on” state. Therefore, the amino-MIL-53(Al) nanosheets were successfully used as a “turn-off-on” fluorescent sensing system to determine the concentrations of Hg2+ in Tibetan medicine and glutathione in rabbit serum. A good correlation coefficient was obtained between the quenching of the fluorescence intensity of luminophor and the concentration of Hg2+ using the optimized conditions. A linear range was acquired from 1.96 nM to 38.27 μM with a detection limit of 0.23 nM of Hg2+ based upon a signal-to-noise ratio of three. For glutathione, the linear dynamic range was from 210 nM to 15.25 μM with a detection limit equal to 8.11 nM based upon a signal-to-noise ratio of three. This developed sensor system has the advantages of high selectivity, favorable sensitivity and simple operation for the determination of Hg2+ and glutathione in real samples.
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高影响因子
RSC Advances
·
2021
·Vol. 11
·期 4
·2397-2404
·
IF 3.361
Jing Chen,Yali Xu,Shuying Li,Fanghong Xu,Qian Zhang
Tetracycline detection has been a great concern because of its overuse and difficulty in degrading. Here, a detection method with ratio fluorescence was developed by synthesizing Eu3+ doped nanocomposites with NH2-MIL-53(Al) nanosheets. After adding tetracycline, the fluorescence intensity at 616 nm characteristic emission peak of Eu3+ was sensitized by the antenna effect generated from coordinating Eu3+ with tetracycline, but the fluorescence of NH2-MIL-53(Al) at 433 nm was quenched by the fluorescence resonance energy transfer between the Eu3+-tetracycline composition and NH2-MIL-53(Al). Therefore, the efficient detection of tetracycline was achieved based on this change of ratio fluorescence signal. The experimental results show that Eu3+/NH2-MIL-53(Al) has excellent selectivity, a wider linear range and a lower detection limit for detecting tetracycline. This method can afford favorable ideas for developing advanced chemical and biological sensors.
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高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Hao Li,Canyuan Lin,Ruhui Ma,Yuancai Chen
In this study, the selective adsorption of aromatic compounds on mesoporous MIL-53(Al) was investigated, and followed the order: Biphenyl (Biph) > Triclosan (TCS) > Bisphenol A (BPA) > Pyrogallol (Pyro) > Catechol (Cate) > Phenol (Phen), and exhibited high selectivity toward TCS in binary compounds. In addition to hydrophobicity and hydrogen bonding, π–π interaction/stacking predominated, and more evidently with double benzene rings. TCS-containing halogens could increase π interaction on the benzene rings via forming Cl–π stacking with MIL-53(Al). Moreover, site energy distribution confirmed that complementary adsorption mainly occurred in the Phen/TCS system, as evidenced by Δ Q pri (the decreased solid-phase TCS concentration of the primary adsorbate) < Q sec (the solid-phase concentrations of the competitor (Phen)) . In contrast , competitive sorption occurred in the BPA/TCS and Biph/TCS systems within 30 min due to Δ Q pri = Q sec , followed by substitution adsorption in the BPA/TCS system, but not for the Biph/TCS system, likely attributed to the magnitude of energy gaps (E g ) and bond energy of TCS (1.80 eV, 362 kJ/mol) fallen between BPA (1.74 eV, 332 kJ/mol) and Biph (1.99 eV, 518 kJ/mol) according to the density-functional theory of Gaussian models. Biph with a more stable electronic homeostasis than TCS lead to the occurrence of substitution adsorption in the TCS/BPA system, but not in the TCS/Biph system. This study provides insight into the mechanisms of different aromatic compounds on MIL-53(Al).
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高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·
IF 1.193
Linli HOU,Li WANG,Yonghai SONG,Limin LIU
A luminescent hydroxyl-functionalized MIL-53(Al) (OH-MIL-53(Al)) was prepared by one-step solvent thermal method for multiresponsive fluorescence sensor. The OH-MIL-53(Al) exhibited uniform nanospheres with average diameter of 150±20 nm, flexible three-dimensional frameworks, and good dispersion in water. The OH-MIL-53(Al) emitted green fluorescence with a maximum wavelength of 515 nm which showed good fluorescence quenching response for sensing F − and fluorescence enhancement response for water, with good day-to-day stability. The mechanism was based on protonation/deprotonation of hydroxyl group located on OH-MIL-53(Al). Good linear relationship could be found between the luminescence intensity of 515 nm and F − concentrations in the range of 0–60 µM with a determination limit of 70 nM. At the concentrations from 0% to 100%, the fitting curve for water content was in good agreement with the linear equation, and the detection limit was 0.10%. OH-MIL-53(Al) demonstrated excellent fluorescence sensing performance, indicating that it could be used as a multiresponsive sensor to practical application.
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高影响因子
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