SENSORS AND ACTUATORS B-CHEMICAL
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2018
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IF 5.667
Shuo Li,Yinghao Duan,Sheng Lei,Jiantong Qiao,Gaiping Li,Baoxian Ye
In this work, a brand new nanocomplex (denoted as [email protected] ) is elaborately designed and successfully synthesized meaning the in-situ assembly of porous-morphology Zn-based MOFs (MOF-5) onto the as-prepared PDDA-rGO-Ni (PGN for short) nanocomposites. When this nanocomplex contributes to construct the electrochemical sensor ( [email protected] /GCE), it presents a highly-sensitive response towards echinacoside, and the first measurement for echinacoside by electrochemistry accordingly evolves forward. The crystallization processes are investigated by FT-IR instrument and XRD analysis, as well as micro-morphology of modified materials is visible upon SEM and TEM. Adorably, a novel ratiometric sensor was progressively fabricated by encapsulating methylene blue (MB) molecules into cubic MOF-5 framewoks (MB encased [email protected] /GCE), and apart from assisting in establishing the analysis method with extreme accuracy and favorable practicality, it dose devote a wider linear scale and a lower detection limit than that [email protected] /GCE has given out. Drawn from the developed calibration curve using differential pulse voltammetry (DPV) technique, the peak intensity ratio (I Ech /I MB ) varies linearly with increased echinacoside concentration in the range of 3.0 × 10 −8 – 1.0 × 10 −6 mol L −1 with limit of detection (LOD) reaching 1.0 × 10 −8 mol L −1 (S/N = 3). Additionally, the proposed assay method has been employed to detect echinacoside in real sample sliced cistanche with satisfactory results.
研究领域:
分析化学
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电化学
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纳米材料
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药物分析
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DOI
高影响因子
MICROCHIMICA ACTA
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2019
·Vol. 186
·期 8
·1-6
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IF 5.479
Yu Li-Qing,Su Fei-Hong,Ma Meng-Yuan,Lv Yun-Kai
A method is described for non-invasive glucose monitoring of diabetics by means of breath analysis. The metal-organic frameworks (MOFs) ZIF-7, UiO-66 and MOF-5 were chosen as sorbents in packed tubes for sampling and preconcentration of acetone and isopropanol which are established diabetes biomarkers. The MOF UiO-66 was found to be the most appropriate sorbent. Following thermal desorption, acetone and isopropanol where quantified by GC. The method has low limits of detection (0.79–0.84 μg·L −1 ) and wide linear ranges (5–2000 μg·L −1 ). It is assumed that the good performance of UiO-66 as a sorbent results from its large surface area and unique porous structure, and from van der Waals interactions. The relative standard deviation for six replicate cycles of sampling and preconcentration using one 50 mg UiO-66 packed tube ranged between 2.3 and 6.7% for intra-day assays, and from 2.7 to 4.3% for inter-day assays. A tube packed with 50 mg of UiO-66 packed tube can be used in over 120 cycles of adsorption/desorption without significant loss of collection efficiency. The GC method has been applied for the analysis of diabetic breath samples, and the recoveries from spiked samples ranged from 89.1 to 107.6%.
Schematic presentation of metal-organic frameworks as sorbents combined with thermal desorption-gas chromatography for the determination of acetone and isopropanol in exhaled breath of diabetics.
研究领域:
分析化学
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材料科学
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医学诊断
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DOI
PubMed
高影响因子
Applied Materials Today
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2024
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IF 7.2
Xiangyu Xu,Jie Zhou,Zhongren Shi,Yan Kuai,Zhijia Hu,Zhigang Cao,Siqi Li
Halide perovskites are renowned for their remarkable optoelectronic properties, yet their application is hindered by stability challenges. Metal-organic frameworks (MOFs) have emerged as promising matrices for enhancing perovskite durability. In this study, we achieved the in-situ synthesis of a series of perovskites within the MOF-5 matrix, spanning three-dimensional, quasi two-dimensional, and two-dimensional structures, via microwave-assisted reaction techniques. This microwave synthesis method has proven to be a rapid and efficient approach for the high-yield production of perovskite materials. These MOF-5⊃perovskites exhibited superior optical properties, positioning them as promising candidates for various optoelectronic applications, including white light-emitting diodes and optical wireless communication (OWC) systems. Significantly, our perovskites demonstrated high and consistent communication rates, making them suitable for both space and underwater OWC deployments. Overall, our study underscores the potential of microwave-assisted synthesis in advancing high-performance perovskite materials, offering valuable insights for the development of future optoelectronic devices.
研究领域:
材料科学
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光电
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化学
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DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
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2025
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IF 3.6
Zefeng Li,Jing Xu,Pingbo Zhang,Mingming Fan,Pingping Jiang,Shijun Chen,Xunxun Sheng
Conventional food packaging plastics are difficult to degrade under natural conditions, causing long-lasting environmental harm. With the aim of addressing this problem, this study develops a novel biodegradable composite food packaging film based on polybutylene adipate-terephthalate (PBAT) and polyurethane (PU). MOF-5 nanoparticles are prepared via the ambient temperature precipitation method and modified with gallic acid (GA). PBAT/PU/GA@MOF-5 composite films are fabricated by the solvent casting method. The findings demonstrate that the introduction of GA@MOF-5 enhances the compatibility between PBAT and PU and reduces phase separation; therefore, it augments the mechanical performance of the resultant composite films. These composite films manifest excellent mechanical, thermal degradation, and antioxidant properties, performing remarkably in apple freshness tests. Furthermore, the incorporation of GA@MOF-5 endows the films with significant antimicrobial activity, showing restraint on the proliferation of both Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). This study offers an innovative idea for biodegradable food packaging materials design and expands the application prospect of the PBAT/PU composite system in the food packaging field. Graphical Multifunctional degradable food packaging film based on PBAT/PU/GA@MOF-5.
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高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
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2022
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IF 3.318
Pandeng Miao,Liu Zhang,Jian Zhang,Mingxuan Ma,Yingxiang Du,Jie Gan,Jiangxia Yang
Metal-organic frameworks (MOFs), defined as a class of microporous hybrid materials, are established by coordination of metal cations with functional organic ligands. In addition to outstanding porosity and large surface area, the structures and functions of MOFs can be designed and adjusted based on different destinations, which would be employed as stationary phases in various chromatographic modes. Pepsin, a class of protein, has been investigated as chiral selector owing to their unique interactions with analytes based on chiral or affinity selectivity. In this work, MOF-5 was exploited to grow on the support of poly (glycidyl methacrylate)–co-(ethylene dimethacrylate) [poly(GMA-co-EDMA)] monoliths by layer-by-layer self-assembly method. Pepsin was subsequently bonded with the carboxyl group of MOF-5 through amidation reaction. The ultimate pepsin@MOF-5@poly(GMA-co-EDMA) column was applied for enantioseparation of six basic chiral drugs by capillary electrochromatography with good resolution and repeatability. Compared with the pepsin modified monolithic column, the newly prepared column with MOF-5 shows significantly enhanced enantiomeric resolution, which reveals that MOFs-modified capillary monolithic columns lead a promising road to separation of racemates by chromatography.
研究领域:
分析化学
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色谱学
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材料科学
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DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2013
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IF 5.695
Yuling Hu,Zelin Huang,Jia Liao,Gongke Li
A facile and efficient strategy about the synthesis of a novel kind of hybrid magnetic metal–organic framework (MOF)-5 via chemical bonding assembly was reported. The covalent bonding established between the amino functionalized Fe3O4 nanoparticles and the surface of the metal organic framework improved the chemical stability and structure uniformity of the hybrid microcrystals. Combination of MOF-5 with Fe3O4 nanoparticles allows for facile withdrawal of the porous materials by magnetic decantation. The powder X-ray diffraction patterns of the hybrid magnetic MOF-5 showed the structure of the metal organic framework was not disturbed with the decoration of magnetic nanoparticles. The as-synthesized materials combine the favorable attributes of both magnetic characteristics of Fe3O4 nanoparticles and high porosity of metal organic framework, making them excellent candidates as adsorbents for magnetic enrichment of trace analytes. Their potential applications were explored by preconcentrating polycyclic aromatic hydrocarbons and gibberellic acids from environmental, food, and plant samples prior to gas chromatography–mass spectrometry (GC/MS) and liquid chromatography-tandem mass spectrometry (LC-MS/MS), respectively. The results showed that the magnetic MOF-5 exhibited superior enrichment capacity for both of these nonpolar and polar analytes. The method demonstrated good precision (relative standard deviations (RSDs) of 1.7–9.7%), low detection limits (0.91–1.96 ng·L–1 for polycyclic aromatic hydrocarbons and 0.006–0.08 μg L–1 for gibberellic acid), and good linearity (correlation coefficients higher than 0.9949). The RSDs of batch-to-batch extraction were 2.9–11.2%. The magnetic MOF-5 was robust enough for repeatable use without damage of extraction performance.
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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食品科学
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植物科学
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DOI
PubMed
高影响因子
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