MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Leikeqing Shen,Xueping Dang,Huaixia Chen
The development of adsorption materials with good stability and high efficiency is significant in solid-phase microextraction (SPME). In this work, metal–organic framework MOF-808 (Zr) was modified by trifluoroacetic acid (TFA) to improve its hydrophobicity. MOF-808-TFA was electrochemically deposited on stainless steel wire with poly (3, 4-ethylenedioxthiophene) (PEDOT) to increase its extraction efficiency. The main parameters in the synthesis and extraction procedure were optimized. The prepared MOF-808-TFA@PEDOT nanocomposite coating was characterized by scanning electron microscopy, energy dispersive spectrometer, X-ray diffraction, Fourier transform infrared spectrometry and thermogravimetric analysis. A direct immersion solid-phase microextraction (DI-SPME) method for six phenols was developed based on the nanocomposite coating which had good service life (150 times). The extraction efficiency was 12 times higher than the commercial PDMS coating. Combined with gas chromatography-flame ionization detector (GC-FID), a simultaneous determination method for the six phenols was established, which exhibited wide linear range with 0.05–50 μg L −1 ( R 2 > 0.99). The limit of detection was 0.01–0.08 μg L −1 (S/N = 3), and the limit of quantification was 0.05–0.25 μg L −1 . The method was applied to determine the migration quantity of phenols from four metal cans with recovery rate between 85.6–116.8 % (RSD < 13.9 %), and it was verified by standard GC–MS method and SPSS statistical analysis. These results indicated the DI-SPME-GC-FID method had reliability and potential application in security testing for food contact materials.
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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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
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2018
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IF 4.7
He-Qi Zheng,Chun-Yan Liu,Xue-Yu Zeng,Jin Chen,Jian Lü,Rong-Guang Lin,Rong Cao,Zu-Jin Lin,Jin-Wei Su
Natural enzyme mimetics with high catalytic activity at nearly neutral pH values are highly desired for their applications in biological systems. Herein for the first time a stable MOF, namely MOF-808, has been shown to possess high intrinsic peroxidase-like catalytic activity under acidic, neutral, and alkaline conditions. As a novel peroxidase mimetic, MOF-808 can effectively catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine when H2O2 serves as oxidant, accompanied by a significant color variation in the solution. The catalytic activity and the color variation were greatly dependent on H2O2 concentration, and thus MOF-808 can be applied to the colorimetric sensing of H2O2. The H2O2 detection limit is 4.5 μM, and the linear range is 10 μM to 15 mM. In view of the significant inhibition effect produced by ascorbic acid, a facile and sensitive approach for colorimetric sensing of ascorbic acid was successfully established. The AA detection limit is 15 μM, and the linear range is 30–1030 μM. Further investigation found that the catalytic activity of MOF-808 could be mainly ascribed to the Zr–OH(OH2) groups. Such active Zr–OH(OH2) groups can be effectively shielded by gluconic acid, and subsequently the catalytic activity of MOF-808 was significantly suppressed. With these findings, a facile and selective colorimetric assay for glucose sensing has been successfully explored via combination of the glucose oxidation with the TMB oxidation. The glucose detection limit is 5.7 μM, and the linear range is 5.7–1700 μM. MOF-808 is one of the best colorimetric biosensors among the peroxidase mimics reported for H2O2, AA, and glucose detection.
研究领域:
材料科学
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分析化学
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生物化学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2024
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IF 3.5
Chengzhao Zhu,Miaomiao Zheng,Mingyu Liao,Nan Jiang,Yuanjie Xiao,Jianbin Liu,Linfeng Zhang,Jia Guo,Huadong Wu,Hao Yan
A functionalized modified metal–organic framework material, T-MOF-808, was synthesized through hydrophobic modification with tetraethyl orthosilicate (TEOS) and chlorotrimethylsilane (TMCS). Then a supported oxidative desulfurization catalyst, [C12Py]3(NH4)3Mo7O24/T-MOF-808(s), was prepared by using a heteropoly acid ionic liquid as the active component. The prepared samples were characterized using FT-IR, XRD, SEM, TEM, XPS, etc. [C12Py]3(NH4)3Mo7O24/T-MOF-808(s) was used in the oxidative desulfurization of dibenzothiophene (DBT). At the same time, the effects of different loadings of the active component, oxygen sulfur ratios, reaction temperatures, and reaction time were also investigated. [C12Py]3(NH4)3Mo7O24/T-MOF-808-15%(s) could oxidize 100% of DBT in 40 min at 60 °C. Significantly, the catalyst exhibited no discernible decline in catalytic activity after 14 runs. In addition, the efficiency of sulfur removal was 85.76% in actual diesel oil. It was found that the cooperative impact of hydrophobic modification and electron transfer makes an important contribution to the high activity. The hydrophobic modification provides a novel approach for using MOF materials in the oxidative desulfurization process.
研究领域:
化学工程
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材料科学
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环境化学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2025
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IF 9.8
Minhai Liu,Yan Zhang,Rui Cheng,Ting Tan,Lan Guo,Fan Liu,Yiqun Wan
An efficient and rapid ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MSMS) method was developed for simultaneous determination of 5 alternaria toxins (ATs) in edible and medicinal plant - peppermint using MOF-808-trifluoroacetic acid (MOF-808-TFA) as the adsorbent. Characterization methods such as scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and N 2 adsorption-desorption demonstrated that the synthesized MOF-808-TFA had a regular ortho-octahedral configuration and high specific surface area. Under the optimal conditions, the 5 ATs showed good linearity (R 2 ≥ 0.9993) in their respective concentration ranges. The limits of quantifications (LOQs) of the method ranged from 0.21 to 0.48 μg/L, and the recoveries were 77.8–118.2 %, with the relative standard deviations (RSDs) less than 8.9 %.
研究领域:
分析化学
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食品科学
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植物学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yan-Ling Guo,Sai-Nan Guo,Ke-Qing Liu,Yan Wei,He Zheng,Jie-Xin Wang
The degradation of nerve agents is essential due to their high toxicity and lethality. The Zr-based metal–organic framework MOF-808 has emerged as a promising catalyst for the destruction of nerve agents and their simulants. However, its efficient synthesis is still a great challenge. In this study, we reported a convenient method for rapidly preparing MOF-808 nanoparticles in a rotating packed bed (RPB) reactor using high-gravity technology. Compared to a conventional stirred tank reactor, the preparation time of MOF-808 in the RPB was greatly shortened from 12 h to 30 min, while the mean particle size was obviously decreased by about 74 %. The obtained MOF-808 nanoparticles exhibited excellent catalytic performance for the hydrolysis of the nerve agent simulant O, O-diethyl S-phenyl phosphorothioate (DEPPT). Particularly, the 339 nm MOF-808 can rapidly degrade DEPPT with a half-life (t 1/2 ) of 4.36 min and an equilibrium degradation rate of 92.6 % at a dosage of 2.5 mg, respectively 1.5 and 1.25 times higher than those of 1.3 µm MOF-808 (t 1/2 = 6.36 min, 74.3 %). Furthermore, the DEPPT degradation mechanism was elucidated through a combination of experimental studies and density functional theory calculations. This work provides valuable insights into the efficient synthesis of nano-MOFs with enhanced catalytic activity for the hydrolysis of nerve agents.
研究领域:
化学
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材料科学
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环境科学
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催化
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2025
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IF 17.7
Huangli Yan,Chengwen Yu,Xianming Zhang,Meihua Tang,Shengli Chen
The large-scale commercialization of proton exchange membrane fuel cells (PEMFCs) has been hindered by the high demand of platinum (Pt) in the cathode due to the sluggish kinetics of the oxygen reduction reaction. Reducing the amount of Pt would worsen the problems caused by the adsorption of perfluorinated sulfonic acid (PFSA) ionomers to Pt via the side chains, namely, blocking the active sites of Pt and inducing densely packed layers of fluorocarbon backbones on Pt surface to obstruct local O 2 transport at the Pt/PFSA interfaces. This work aims at optimizing the Pt/ionomer interface to mitigate the sulfonate adsorption and in the meantime to reduce the local O 2 transport resistance ( R local ), by using a porous composite of 1-butyl-3-methylimidazolium hydrogen sulfate ionic liquid (IL) modified MOF-808 (BMImHSO 4 @MOF-808) as additive in cathodic catalyst layer (CCL). Through detailed physical, spectroscopic and electrochemical characterizations, we demonstrate a three-fold optimization mechanism of Pt/ionomer interface structure by BMImHSO₄@MOF-808: the unsaturated metal sites in MOF-808 effectively inhibit the sulfonate adsorption on Pt through coordination with the sulfonates of PFSA, thereby improving catalyst utilization; the pores in MOF-808 establish efficient transport channels for gaseous oxygen, significantly reducing R local ; the IL modification layers facilitate the formation of continuous proton transport networks, increasing proton conductivity. The incorporation of BMImHSO₄@MOF-808 in a low-Pt CCL (0.1 mg Pt cm –2 ) yields a peak power density of 1.9 W cm –2 for PEMFC under H 2 -O 2 condition, and ca. 20% increase of power density under H 2 -air condition as compared with conventional CCL, indicating the prospect of IL-MOF composites as an efficient additive to enhance the performance of PEMFCs.
研究领域:
能源材料
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电化学
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纳米技术
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燃料电池
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表面科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Jincheng Mu,Jianfang Liu,Zhenzhen Ran,Muhammad Arif,Min Gao,Chen Wang,Shengfu Ji
MOF-808(Zr) with the coordinated unsaturated (CUS) Zr4+ centers was synthesized by the thermal reflux method, and a series of Au/MOF-808(Zr) catalysts with different Au loading percentages have been prepared by the impregnation–reduction method. The related X-ray diffraction, Fourier transform infrared spectroscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, N2 adsorption–desorption, Inductively coupled plasma-mass spectrometry, and NH3 temperature-programmed desorption characterizations have been undertaken to understand the structure of catalysts. The catalytic activity in CO2 with aniline/H2 to N-methylation and N-formylation has been studied in a batch reactor. Results show that the MOF-808(Zr) structures in catalysts are of high quality and damage-free. The Au nanoparticles (NPs) are highly dispersed on the surface of the MOF-808(Zr) cage with a mean size of 2–20 nm. Also, the catalysts could catalyze the conversion of CO2 with aniline/H2 to N-methylation and N-formylation products with a high efficiency. With a 3.0 wt % Au/MOF-808(Zr) catalyst, the conversion of aniline is 18.4%, and the selectivity of N-methylaniline is 80.9% and that of N,N-dimethylaniline is 19.1%. The preliminary reaction mechanism and the critical role of CUS were also studied. It is determined that H2 is adsorbed and activated on Au NPs. CO2 is adsorbed on the CUS Zr4+ acidic sites and O2– basic sites. The primary and secondary amines are adsorbed on the CUS Zr4+ acidic sites, where they react with CO2 and H2 to form N-formamide. Subsequently, N-formamide reacts with activated H2 to yield N-methylamine.
研究领域:
催化
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材料科学
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化学工程
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环境化学
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2022
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IF 5.876
Ning Wu,Hao Guo,Liping Peng,Yuan Chen,Lei Sun,Yinsheng Liu,Xiaoqing Wei,Wu Yang
Creatinine (Cre) measurement in biological fluids is an increasingly important clinical measure for evaluating renal insufficiency, thyroid dysfunction, and muscle injury. Therefore, a simple, fast, and reliable Cre analysis method is of great significance to human health. Herein, a novel ratiometric fluorescence sensor, Ag-Eu-MOF-808-EDTA, was synthesized by introducing ethylenediaminetetraacetic acid (EDTA), Ag + , and Eu 3+ into the framework of MOF-808 through three steps of post-synthesis modification, and was used to detect Cre in PBS buffer of pH 7.2 at 35 °C with a “turn-on” ratio response in the presence of various interfering ions and several biomolecules. In this strategy, the characteristic emission of Eu 3+ at 551 nm can be turned on due to coordination between Cre and Ag + , while emission at 613 nm is independent of Cre, which produces a significant ratio response change throughout the cycle. Experimental results showed that the ratio fluorescence sensor displayed a wide linear range for Cre from 0.5 to 350 μM with a low detection limit of 0.42 μM. Finally, a good recovery rate (96.7–102.9%) and appropriate relative standard deviation (RSD <2.39%, n = 3) were obtained during the determination of creatinine in real urine and serum. This work provides additional insights into the detection of creatinine in clinical blood samples.
研究领域:
分析化学
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生物医学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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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
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Jiatong Li,Jie Li,Jiakang Hu,Yongxin Li,Hui Huang
The dual enzyme-like activities (phosphatase-like activity and laccase-like activity) of one nanozyme (Ce-MOF-808) were employed to develop a nanozyme cascade sensor for the facile and selective detection of profenofos. It was found that the nanozyme Ce-MOF-808 had phosphatase-like activity (V max = 0.31 μM/min and K m = 0.014 mM) and laccase-like activity (V max = 6.27 μM/min and K m = 0.033 mM). In the cascade sensor process, profenofos was first hydrolyzed by Ce-MOF-808. The P O bond was cleaved to produce 4-bromo-2-chlorophenol containing phenol through the phosphatase-like activity of nanozyme. The colorless product was efficiently oxidized because of the laccase-like activity of nanozyme, and then reacted with the color rendering agent 4-aminoantipyrine to produce the red quinone imine. The absorbance peak at 510 nm fitted a linear curve. The limit of detection (LOD) was determined to be 3.33 μg/mL in this method. The quantitative detection of profenofos was conducted on a variety of different real samples. Nanozymes could be stored at 4 ℃ for a long time and the detection method was simple and direct. The nanozyme cascade sensor was convenient and rapid for the detection of pesticides and had promising application prospects in the conventional rapid detection of pesticides in the field.
研究领域:
生物化学
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分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Xueyan Zhang,Xinxin Xing,Xudong Zhao,Jinhua Yang,Meihan Liu,Baosheng Liu,Xinli Gao,Hongliang Huang
Selective adsorption of lithium ion from aqueous media is one of important routes to solve the scarcity and high cost problems of this valuable resource. Crown ethers (CE) as classical Li-oriented molecules are commonly loaded in solid matrixes to construct adsorbents. However, unreasonable selection of matrixes easily leads to low loading efficiency and inadequate exposure of CE sites, resulting in unsatisfactory performances. Herein, we designed a novel crown ether-decorated metal–organic framework (MOF-808-12C4E), via grafting carboxybenzo 12-crown-4-ether (CB-12C4E) molecules in a highly porous MOF-808 platform. Based on the rich exchangeable sites, dense 12C4E units (1.47 mmol g −1 ) were successfully introduced in the Zr nodes of MOF-808. Thanks to the large ion diffusion channel and dense active sites, MOF-808-12C4E shows a high adsorption capacity (30.4 mg g −1 ) and very short adsorption equilibrium time (15 min). Selective adsorption of Li + ion over Na + , K + , Ca 2+ , and Mg 2+ ions was achieved, due to the higher suitability of Li + ion diameter with the size of 12C4E hole. Based on experimental characterizations and theoretical calculations, we confirm the crucial contribution of 12C4E units for the selective adsorption behavior of Li + ion. Thus, our work provides an efficient adsorbent for selectively capturing Li + ion, and meanwhile proves the promising potentials of porous MOFs for grafting active crown ethers.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Bo Yue,Zhongwei Pang,Yang Yu,Jianfei Wu,Jiafu Qu,Jundie Hu,Dan Tian,Jianzhang Li,Yahui Cai
The environmental pollution caused by the discharge of oily wastewater and printing and dyeing wastewater is becoming more and more serious. Therefore, it is necessary to find an efficient method to separate oil/water emulsions and remove organic dyes from water simultaneously. However, the traditional separation membranes are usually very expensive and easy polluting the environment. Therefore, how to prepare high-efficiency separation membrane from low-cost, green renewable materials remains a huge challenge. In this study, ethylenediaminetetraacetic acid (EDTA) modified metal–organic framework (MOF-808) nanoparticles were introduced into the wood substrate to construct a 3D wood/MOF-808-EDTA membrane with efficient water purification performance (oil/water emulsion separation and organic dye removal). Due to the introduction of hydrophilic MOF-808-EDTA nanoparticles, this novel membrane can effectively separate stable oil-in-water emulsions and remove organic dyes from water. The prepared wood/MOF-808-EDTA membrane has a high separation efficiency (more than 99.9 %) and permeation flux (1698 ± 15.85 L·m −2 ·h −1 ). The removal efficiency of organic dyes is more than 94 % with the permeation flux 1360 ± 2.54 L·m −2 ·h −1 . More importantly, the separation efficiency (oil/water emulsion) remained above 99.9 % and the dye removal efficiency was still above 90 % after 10 cycles. Additionally, the wood/MOF-808-EDTA membrane also has good mechanical/chemical stability and anti-fouling properties. This work opens a new approach for the development of functional biomass material membranes for sewage purification.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）