MICROCHEMICAL JOURNAL
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2022
·
IF 5.304
Li Yang,Shuang Wang,Zhongshui Xie,Rongrong Xing,Runqin Wang,Xuan Chen,Shuang Hu
A novel deep eutectic solvent - loaded magnetic solid phase extraction (DES-L-MSPE) method was proposed, which was based on the direct loading of a hydrophobic DES composed of L-menthol and lactic acid (1:2) into the pores of core–shell magnetic Fe 3 O 4 @MIL-101(Cr) nanoparticles. The function of DES was to condition the Fe 3 O 4 @MIL-101(Cr) and promote liquid phase microextraction for the analytes. Through coupling with HPLC-UV analysis, this method was utilized for the determination of six non-steroidal anti-inflammatory drugs (NSAIDs), including ketoprofen, naproxen, flurbiprofen, diclofenac sodium, ibuprofen, and mefenamic acid in environmental water samples. The influencing parameters such as type and ratio of DES, amount of adsorbent, sample solution pH, salt concentration, extraction time, elution solvent and time were investigated and optimized in detail. Under the optimal conditions, the method exhibited good linearity (5.0–1000 μg/L for ketoprofen, ibuprofen, 1.5–600 μg/L for flurbiprofen, mefenamic acid, 2.5–1000 μg/L for naproxen and 3.0–600 μg/L for diclofenac sodium with the correlation coefficients ranging from 0.9972 to 0.9993), low limits of detection (0.20–1.1 μg/L), and high precision (RSD < 8.2 %). Besides, the recoveries in spiked lake and river water samples were 89.8 %–110.4 % and 83.8 %–109.0 %, respectively. Taken together, the established method was proved to be simple, fast, highly sensitive and accurate for the determination of NSAIDs from aqueous matrices.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yuanhong Xie,Chenrui Liu,Dejian Li,Yun Liu
Herein, a novel composite of MIL-101(Fe) loaded with nitrogen doped carbon quantum dots (NCQDs/MIL-101(Fe), denoted as NQML), which can construct dual effect of photocatalysis and photo-Fenton for organic pollutants removal, was prepared by solvent impregnation method. Characterization methods proved that NQML had been synthesized successfully. Additionally, the adding volume of NCQDs could effectively influence the photocatalytic activities of NQML-x composites (x represents the adding volume of NCQDs) for tetracycline (TC) degradation, and NQML-8 exhibited the optimum photocatalytic performance among the studied catalysts upon visible light illumination under natural pH, which can completely degrade TC within 180 min. By comparison, the TC degradation kinetic constant in the system with NQML-8 was as 15.85 and 8.24 folds of that in the NCQDs and MIL-101(Fe) systems, respectively. The mechanism study proved that the enhanced photocatalytic performance of NQML was resulted from the visible light up-conversion property, electron-hole separation and transfer capacity of NCQDs. Meanwhile, NQML could not only produce h + but also lead to in-situ generation of O 2 - and H 2 O 2 by activation of O 2 under visible light. The generated H 2 O 2 could react with Fe(II) in MIL-101(Fe) to produce OH so as to construct a dual effect of photocatalysis and photo-Fenton in TC removal.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Zhiyang Qin,Tianyue Peng,Xinguang Qin,Gang Liu,Haizhi Zhang
Accurate detection of tetracycline residue is of great significance for ensuring product quality and protecting human health. Here, a colorimetric/fluorescent dual-mode biosensor was developed for the detection of tetracycline in honey by using metalloporphyrin [TCPP(Fe)] covalently modified NH 2 -MIL-101(Fe) [named NH 2 -MIL-101(Fe)@TCPP(Fe)]. The morphology, chemical structure and peroxidas-like activity of this hybrid nanozyme were comprehensively studied. Based on excellent catalytic activity and intrinsic fluorescence of NH 2 -MIL-101(Fe)@TCPP(Fe), a colorimetric/fluorescent dual-mode biosensor was developed for the detection of tetracycline. The primary mechanism for this dual mode biosensor was the inhibitory effect of tetracycline on on NH 2 -MIL-101(Fe)@TCPP(Fe) catalyzed chromatic reaction between H 2 O 2 and 3,3′,5,5′-tetramethylbenzidine (TMB)/ o -phenylenediamine (OPD), which was ascribed to the consumption of · OH by tetracycline and the adsorption of tetracycline on the surface of NH 2 -MIL-101(Fe)@TCPP(Fe). After effective validation, this colorimetric/fluorescent dual mode method was applied to detect tetracycline residues in three actual honey samples.
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PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Shihui Zhang,Xu Zhang,Wanting Shi,Weiyan He,Caihong Li,Xiaojing Wang
Slow charge transfer and a weak built-in electric field (BIEF) at the heterojunction interface critically hinder the construction of efficient S-scheme heterojunctions. Secondary calcination and ultrasonic treatment of g-C 3 N 4 enhance interfacial contact with MIL-101, shortening carrier migration paths. P and Mn doping increases the Fermi-level difference between g-C 3 N 4(C,S) and MIL-101, strengthening the BIEF to drive directional carrier migration. This facilitates the recombination of carriers with low-redox-potential at the heterojunction interface while spatially separating carriers with high-redox-potential, successfully constructing an S-scheme P-Mn-MCN (C,S) heterojunction. The optimized system delivers remarkable photocatalytic performance, achieving 98 % tetracycline hydrochloride degradation under visible light within 60 min.
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高影响因子
FOOD CONTROL
·
2022
·
IF 6.652
Dakai Guo,Qingwen Huang,Rui Zhao,Wenbo Guo,Kai Fan,Zheng Han,Zhihui Zhao,Dongxia Nie
An efficient and fast magnetic solid phase extraction (MSPE) method was developed using MIL-101(Cr)@Fe 3 O 4 nanocomposites as adsorbent for purification and enrichment of 9 mycotoxins in agricultural products. The successful synthesis of MIL-101(Cr)@Fe 3 O 4 was confirmed via various characterization methods. Several key parameters affecting the performance of the MSPE procedure were extensively investigated including loading solution, elution solution and dosage of adsorbents. Under the optimal sample pretreatment conditions, the complex matrix effects from different agricultural products could be efficiently eliminated and the calibration curves constructed in neat solvent were directly used for the accurate quantification of these mycotoxins. Coupled with the analysis by ultra-high-performance liquid chromatography-tandem mass spectrometry, good linearity (R 2 ≥ 0.991), high sensitivity (limit of quantification in the range of 0.08–0.20 μg kg −1 ), satisfactory recovery (83.5–108.5%) and acceptable precision (RSD, 1.6–10.4%) were obtained. The applicability of the validated method was further verified in real maize, wheat, watermelon and melon samples.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Ting Wang,Jie Cheng,Jinmao You,Zhiwei Sun
A selective and rapid high-performance liquid chromatography with fluorescence detection (HPLC-FLD) method for determining fumonisins was established and validated, which based on dispersed microsolid-phase extraction (D-μ-SPE) and precolumn derivatization. The MIL-101 was prepared as sorbents to selectively enrich two fumonisins from feed samples. The obtained extracts were labeled by a novel derivatization reagent 2,5-dioxopyrrolidin-1-yl 4-(1-methyl-1H-phenanthro[9,10-d]imidazol-2-yl)benzoate (MPIBA-Su). There was no fluorescence from fumonisins itself, while their derivatives exhibited considerable fluorescence with a maximum excitation at λex 255 nm and a maximum emission at λem 457 nm. Key factors affecting extraction efficiency and derivatization efficiency were fully optimized. Excellent linearity was achieved with correlation coefficients > 0.9935 under optimal conditions. The detection limits (LODs) were between 2.4 and 3.5 ng·mL −1 , and the quantitation limits (LOQs) were between 8.1 and 11.7 ng·mL −1 . With recoveries in the range of 83.8% − 94.3%, the established method has successfully been applied to the quantitative analysis of fumonisins in feed samples.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2015
·
IF 2.587
Meng Chen,Jiaqi Yan,Ying Tan,Yongfei Li,Zhimin Wu,Langsheng Pan,Yuejin Liu
Hydroxyalkylation of phenol with formaldehyde to bisphenol F was investigated over the metal–organic frameworks of MIL-100(Fe or Cr) and MIL-101(Fe or Cr) encapsulated with Keggin phosphotungstic acid (PTA). PTA@MIL-100(Fe or Cr)(β) and PTA@MIL-101(Fe or Cr)(β) with different β values (the molar ratio of W/M, where M = Fe or Cr) were prepared and characterized by XRD, BET, FT-IR, TG, SEM, TEM, and ICP. The research results showed that PTA@MIL-100(Fe or Cr)(β) had a higher catalytic activity than PTA@MIL-101(Fe or Cr)(β). PTA@MIL-100(Fe)(0.4) was the most effective among the studied catalysts and had excellent reusability. A 92.12% product yield and 93.01% selectivity for bisphenol F could be obtained over the PTA@MIL-100(Fe)(0.40) catalyst. The effects of the reaction time, reaction temperature, catalyst concentration, and phenol/formaldehyde molar ratio on the reaction performance were also investigated. A plausible mechanism for hydroxyalkylation of phenol with formaldehyde to bisphenol F was proposed.
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TALANTA
·
2024
·
IF 5.6
Xueyun Wei,Zhuomin Zhang,Gongke Li
Aromatic disinfection by-products (DBPs) have garnered considerable interest in recent years for their potential carcinogenicity. However, efficient separation and enrichment of DBPs in complex samples is a challenge due to the extremely low content of aromatic DBPs and the complexity of sample matrices. In this study, a MIL-101(Cr)–NH 2 @TAPB-DVA-COF hybrid material was prepared as the enrichment medium of membrane solid-phase extraction (M-SPE) to efficiently determine trace emerging aromatic DBPs. This medium exhibited excellent enrichment capacity and selectivity for aromatic DBPs because of the strong hydrogen bonding, π-π stacking and hydrophobic interactions. An efficient analytical method for five aromatic DBPs in juice drinks was successfully established by use of this hybrid material as the enrichment medium for M-SPE in combination with liquid chromatography tandem mass spectrometry (LC-MS/MS). The limits of detection of the established method were from 0.50 to 3.00 ng/L. Moreover, the method had been successfully used in real juice drinks to determine trace five aromatic DBPs with the spiked recoveries ranging from 84.1% to 125%. The method possessed high analytical sensitivity and accuracy for these five aromatic DBPs in juice drinks with the aid of the efficient M-SPE technology proposed.
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PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2018
·
IF 3.972
Wei Zhang,Run-Zhi Zhang,Yong-Qing Huang,Ji-Min Yang
Herein, we report that the surface charge status and size of the metal–organic framework (MOF) MIL-101(Cr) can be tailored by varying the concentration of tetramethylammonium hydroxide. The adsorption capacity of MIL-101(Cr)-2 toward the anionic dye Congo red (CR) was found to be significantly higher than that of other MIL-101(Cr) adsorbents, although MIL-101(Cr)-3 microcrystals exhibited the highest adsorption capacity toward the anionic dye methyl orange (MO) due to the different adsorption mechanisms involved. This is the first demonstration of the synergetic interplay between the electrostatic and π–π interactions, adsorption spaces and sites, and size of the dye molecules, in terms of the uptake capacity of an adsorbent. In addition, the obtained results shed new light on the adsorption mechanism toward organic dyes over MOFs. Moreover, the MIL-101(Cr) microparticles exhibited excellent adsorption capabilities toward CR, achieving a maximum capacity of 1367.1 mg g–1, which is higher than the majority of reported values for other materials. Therefore, these results indicate that the MIL-101(Cr) nanostructure exhibits potential for application in the treatment of anionic dye-containing wastewater.
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TALANTA
·
2016
·
IF 4.035
Xinpeng Dai,Xiuna Jia,Pan Zhao,Ting Wang,Jian Wang,Peiting Huang,Lu He,Xiaohong Hou
As a novel kind of materials, metal-organic frameworks (MOFs) have great potential for the preconcentration of trace analytes. In our work, MIL-101(Cr) was prepared and applied as a solid phase extraction (SPE) sorbent for the pretreatment of sulfadiazine (SDA), sulfamethazine (SMZ), sulfachloropyridazine (SCP) and sulfamethoxazole (SMX) in different environmental water samples coupling with ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) detection. Experimental parameters, such as SPE materials, pH of water sample, volume of sample, flow rate , and type and volume of elution solvent, were properly optimized. Under the optimum conditions, good sensitivity levels were achieved with the detection limits of 0.03–0.08 μg/L and the quantitation limits of 0.11–0.27 μg/L. The linear ranges were from 0.2–40 or 0.5–100 μg/L ( r 2 >0.996) for the analytes, and the relative recoveries were in the range from 83.5% to 107.3% with the relative standard deviations (RSD) between 0.2% and 8.0% ( n =6). In addition, computational simulation was primarily used to predict the adsorption of MIL-101(Cr) toward sulphonamides (SAs), and also demonstrated the molecular interactions and free binding energies with the molecular modeling method. The results revealed that the combination of experimental and computational study not only accurately recognized the adsorption of MIL-101(Cr) on SAs, but also provided a new strategy on the trace contaminant analysis.
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高影响因子
IONICS
·
2023
·Vol. 29
·期 5
·1803-1812
·
IF 2.8
Lou Ping,Li Long,Wu Yiyun,Yue Lingping,Wang Yao,Tang Shun,Zhang Weixin,Cao Yuancheng
Li–air battery-based solid electrolyte can better protect the lithium anode from the corrosion of other components and effectively block the risk of ignition and explosion caused by the lithium dendrite penetrating the dielectric layer. In this work, Li-containing ionic liquid (Li-IL) is absorbed in NH 2 -MIL-101(Cr) metal–organic frameworks (MOFs) to form a functional filler and further incorporated the filler into polyethylene oxide (PEO) to fabricate composite solid electrolyte (Li-IL@NH 2 -MIL-101(Cr)/PEO). The lithium anode and the air cathode were modified with Li-IL@NH 2 -MIL-101(Cr)/PEO, and the integrated solid-state Li–air batteries were prepared by roller pressing. Taking advantage of nanostructured Li-IL@NH 2 -MIL-101(Cr), fast lithium–ion transportation is achieved in the bulk and across the electrode/electrolyte interface. As a result, the ionic conductivity of the Li-IL@NH 2 -MIL-101(Cr)/PEO reaches 3.1 × 10 –4 S/cm, the Li–air battery using the Li-IL@NH 2 -MIL-101(Cr)/PEO as solid electrolyte exhibited a high specific capacity of 11,682 mAh/g and remarkable cycling stability of 122 cycles.
研究领域:
储能
·
材料科学
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电化学
·
纳米技术
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电池技术
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高影响因子
MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 8
·2981-2990
·
IF 4.58
Wang Ting,Liu Siyu,Gao Guihua,Zhao Pan,Lu Nan,Lun Xiaowen,Hou Xiaohong
The authors describe a method for magnetic solid phase extraction (MSPE) combined with ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) for the quantitation of eight non-steroidal anti-inflammatory drugs (NSAIDs) in wastewater and environmental water samples. Specifically, the NSAIDs were directly extracted by using a magnetic nanocomposite of type Fe 3 O 4 /MIL-101(Cr) (Matérial Institute Lavoisier, MIL) from 50 mL water samples without any further cleanup. The effects of the amount of adsorbent, pH value, salt concentration, ultrasonic extraction time, desorption solvent nature and volume and desorption time were investigated. Under the optimal conditions, UPLC-MS/MS based detection resulted in the following figures of merit: (a) Linear calibration plots that typically extend from 0.1 (0.2, 0.05, 0.02) to 50 μg·L −1 , depending on the compound; (b) detection limits between 3 to 60 ng·L −1 ; and (c), recoveries varying from 81.2% to 116.8% with relative standard deviations between 0.4% and 10.8%. The adsorption of NSAIDs on Fe 3 O 4 /MIL-101(Cr) was characterized by adsorption isotherms, kinetics and thermodynamics studies and provides a deeper insight into the adsorption mechanism. Compared to other method for pretreatment and preconcentration of NSAIDs, the new method is more rapid, sensitive, accurate and eco-friendly. The method was successfully applied to the determination of the NSAID residues in a variety of real environmental and wastewater samples.
Schematic of a method for determination of non-steroidal anti-inflammatory drugs (NSAIDs) in environmental water by magnetic solid phase extraction based on Fe 3 O 4 /MIL-101(Cr) combined with UPLC-MS/MS. The adsorption mechanism of NSAIDs on Fe 3 O 4 /MIL-101(Cr) was studied.
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