SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiaohuan Zang,Qingyun Chang,Hongda Li,Xiaoxian Zhao,Shuaihua Zhang,Chun Wang,Zhi Wang
In this work, a ringent multi-shelled hollow MIL-88B (RMH-MIL-88B) was prepared from the original MIL-88B via etching by citric acid, and was used as the fiber (SPME) coating material for the direct-immersion solid-phase microextraction of eleven organochlorine pesticides (OCPs) from fish samples prior to gas chromatography-electron capture detection. The unique multi-shelled structure with void space between shells enables the RMH-MIL-88B to provide more adsorption sites and to have larger adsorption capacities for the OCPs than the original MIL-88B. Under the optimized experimental conditions, a wide linear range (from 3.3 to 600.0 ng g −1 ) with the coefficients of determination ( r 2 ) varying from 0.9960 to 0.9997 was obtained. The limits of detection (S/N of 3) for the analytes were in the range of 1.0–3.0 ng g −1 . In the determination of the analytes, the single fiber repeatability (n = 5) by single RMH-MIL-88B-coated fiber ranged from 4.1 % to 7.6 %, while the fiber-to-fiber reproducibility by five parallel RMH-MIL-88B-coated fibers were in the range of 8.0 %–12 %. The established method was successfully applied for the sensitive determination of the eleven OCPs in four fish samples (grass carp, crucian carp, tilapia, and mandarin fish). The relative recoveries of the analytes for spiked fish samples at three concentration levels (15.0, 80.0 and 300.0 ng g −1 ) were in the range of 82.11 %–115.7 % with the relative standard deviations of 4.4 %–12 %.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Jiao Li,Yuefan Wang,Chenxi Wang,Yilin Wang,Yaqi Yang,Jia Chen,Chunyan Li,Yixi Xie,Pengcheng Zhao,Junjie Fei
Baicalin obtained from natural plants has essential medical value, so the development of accurate and sensitive quantitative methods for it is one of the most important tasks. Here, the FeO X /Fe@porous carbon composite (Fe@C) was synthesized by solvothermal method and carbonized at different temperatures under an N 2 atmosphere, and an electrochemical sensor designed based on this material was applied to the accurate and rapid determination of baicalin. According to the results of physical and electrochemical characterization, Fe@C at different pyrolysis temperatures exhibited different morphologies and different electrochemical properties , while the Fe@C pyrolyzed at 800 °C had the optimum performance. Compared with NH 2 -MIL-88B, the pyrolysis greatly reduces the charge transfer internal resistance of the material and has a larger porosity and specific surface area, resulting in an eminent electrochemical signal for the detection of baicalin. The sensor Fe@C-800/GCE not only has a linear range of 4 nM–700 nM with a low limit of detection of 1.16 nM for the detection of baicalin, but also has outstanding repeatability, anti-interference and stability for the detection of baicalin in several natural plant samples and herbal medicines samples. This work presents several pyrolytic NH 2 -MIL-88B as electrochemical sensors for the detection of baicalin for the first time, providing a novel idea for the application of MOFs derivatives in environmental analysis.
研究领域:
分析化学
·
生物医学工程
·
材料科学
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Lin Li,Hongyu Zhang,Mengdan Zhang,Ting Wang,Xiaohong Hou
MIL-88B(Fe)/cellulose microspheres (MIL-88B(Fe)/CMs) were characterized by the means of SEM, XRD, TGA and N 2 adsorption-desorption test. The composite was used as the sorbent for fully automated dispersive pipette extraction (DPX), after introducing CMs as the support, the loss of MIL-88B(Fe) in DPX was avoided. Coupled to UPLC-MS/MS, the proposed method was employed for the analysis of trace sulfonamides (SAs) in milk samples. The parameters affecting the extraction efficiency, including pH of sample solution, the rate of aspiration and dispense, amount of the adsorbent, type and volume of elution solvent were optimized. Under the optimal conditions, good linearity (r ≥ 0.9978 for five analytes), high sensitivity (limit of detection: 0.00660–0.0136 μg kg −1 ) and satisfactory recovery (69.8%–100.9%) were achieved. Furthermore, the sorbent showed desirable reusability over eight extraction cycles. Compared with other methods for the pretreatment of SAs, the proposed method showed advantages of high sensitivity, less sorbent consumption, environmental friendliness and automation, providing a promising protocol for sample preparation.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·Vol. 20
·期 27
·2309541
·
IF 13
Tingting Liu,Kaiyue Hu,Yansheng Li,Yanhong Wang,Dongmei Han,Zhihua Wang,Fubo Gu
The Z-scheme MIL-88B/BiOBr (referred to as M x B y , whereas x and y are the mass of MIL-88B(Fe) and BiOBr) heterojunction photocatalysts are successfully prepared by a facile ball milling method. By adding low concentration H 2 O 2 under visible light irradiation, the Z-scheme heterojunction and photocatalytic-Fenton-like reaction synergistically enhance the degradation and mineralization of ciprofloxacin (CIP). Among them, M50B150 showed efficient photodegradation efficiency and excellent cycling stability, with 94.6% removal of CIP (10 mg L −1 ) by M50B150 (0.2 g L −1 ) under 90 min of visible light. In the M x B y heterojunctions, the rapid transfer of photo-generated electrons not only directly decomposed H 2 O 2 to generate · OH, but also improved the cycle of Fe 3+ /Fe 2+ pairs, which facilitated the reaction with H 2 O 2 to generate · OH and · O 2 − radicals. In addition, the effects of photocatalyst dosages, pH of CIP solution, and coexisting substances on CIP removal are systematically investigated. It is found that the photocatalytic- Fenton-like reaction can be carried out at a pH close to neutral conditions. Finally, the charge transfer mechanism of the Z-scheme is verified by electron spin resonance (ESR) signals. The ecotoxicity of CIP degradation products is estimated by the T.E.S.T tool, indicating that the constructed photocatalysis-Fenton-like system is a green wastewater treatment technology.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Meng Wang,Jingjing Wang,Kangkang Wang,Liugen Zhang,Xianglei Cao,Cheng Guo,Jide Wang,Bin Wu
More and more attention has been paid to the improved QuEChERS (quick, easy, cheap, effective, rugged and safe) method in dealing complex sample matrices, especially for the study of QuEChERS adsorbents. In this study, a magnetic mesoporous material, which was derived from MIL-88B modified by l -alanine, was synthesized as modified QuEChERS adsorbents for the simultaneous determination of multiple pesticides (Methomyl, Isoprocarb, Carbofuran, 3-Hydroxycarbofuran, Acetamiprid, Imidacloprid) in Chinese cabbage, celery, long bean and leek. The prepared magnetic adsorbents can effectively remove interfering substances from the sample, and the proposed modified QuEChERS method can reduce sample pretreatment time via an external magnetic field. To achieve the best performance of QuEChERS method, the clean-up time and amount of QuEChERS adsorbents were investigated. Under the optimized conditions, a simple, rapid and sensitive method for the determination of 6 pesticide residues in vegetables was established by coupling the modified QuEChERS to ultrahigh-performance liquid chromatography-tandem mass spectrometry. Excellent sensitivity (The limit of detection for the 6 pesticides ranged from 0.001 to 0.020 µg kg −1 ), satisfactory linearity (r 2 ≥ 0.9952), good recovery (73.9–107.7%) and good precision (3.6–16.9% for intraday relative standard deviation, 0.5–15.0% for interday relative standard deviation) were obtained. Compared with traditional QuEChERS method, the proposed method is simple, cost-effective, and efficient, which indicates that the method can be used to detect carbamate and neonicotinoid pesticides in real samples and provide an excellent pretreatment technique for the detection of trace multi-analytes from complex substrates.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yao Ji,Zhiyuan Pan,Tiangang Ma,Ke Wang,Xiaoxian Zhao,Quan Jin
Hierarchical porous spindle-shaped MIL-88B (HPS-MIL-88B) with core-shelled structure was prepared by citric acid-assisted. The material exhibits open channels on its outer surface and a hierarchical internal cavity structure with meso-/macro-pores. The samples were then pretreated at 200 °C to form an oxide film , aiming to improve the conductivity of material. The as-prepared HPS-MIL-88B-6 h@Fe 2 O 3 material with core-shelled structure exhibits superior selectivity and high sensitivity to trimethylamine (TMA) at 200 °C (detection limit as low as 1 ppm) with fast response and excellent repeatability. The outstanding sensing performance was owing to the open and hierarchical porous that enhances the reaction between the target gas and the active sites of the material. In addition, the metal unsaturated active sites of MIL-88B (Lewis’s acid) can selectively undergo acid-base reactions with TMA (Lewis’s base), enhancing the generation of oxygen species and improving the selective adsorption capacity towards the target gas. This work provides a new path route for the application of MOF materials in sensors.
研究领域:
材料科学
·
化学传感器
·
纳米材料
·
气体传感
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Zhi Luo,Yusheng Wu,Dongmiao Qin,Shuo Meng,Chujie Zeng,Biyang Deng
A luminescent reagent, 3,4,9,10-perylenetetracarboxylic acid (PTCA), was linked to a metal–organic framework (MOF) Fe(III)-MIL-88B-NH 2 through an amide reaction to form a [email protected] (III)-MIL-88B-NH 2 complex, and then gold nanoparticles (AuNPs) were grown in situ. Thus, the [email protected] (III)-MIL-88B-NH 2 @Au electrochemiluminescence (ECL) probe was obtained. The MOF of 2-aminoterephthalic acid with large specific surface area, pore sizes, and structures, which served both as the carrier and a co-reaction promoter, promoted the conversion of more S 2 O 8 2- into SO 4 •- , further enhancing the ECL signal of PTCA. An electrochemiluminescence resonance energy transfer (ECL-RET) platform was designed for the ultrasensitive and highly selective detection of cystatin C (CysC). The developed ECL-RET biosensor presented a linear range from 0.01 pg/mL to 100 ng/mL and a detection limit of 2.2 fg/mL (S/N = 3). Moreover, all the results showed that the developed ECL-RET biosensor broadened the application in the fields of biosensing and medical diagnosis.
研究领域:
分析化学
·
纳米技术
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2025
·
IF 3.1
Erxu Wang,Huiran Zhang,Xiangchuan Li,Lili Geng,Zhen Wang,Airong Chu,Bin Lu,Li Duan
Alzheimer’s disease (AD) is a common neurodegenerative disease, and is characterized by impaired acetylcholine-mediated neurotransmission. Acetylcholinesterase (AChE) inhibition is a well-established therapeutic strategy for AD. Medicinal plants exhibit multi-target effects, low toxicity, and cost-effectiveness. Therefore, screening AChE inhibitors from botanical sources holds considerable pharmacological potential. In this study, a metal-organic framework was used as a novel support for immobilizing AChE, resulting in the creation of AChE@MIL-88B-NH 2 , which served as a tool for screening potential AChE inhibitors. The immobilized enzyme exhibited excellent reusability, stability against pH fluctuations and thermal stress, and resistance to organic solvents. The constructed AChE@MIL-88B-NH 2 -based ligand fishing strategy coupled with mass spectrometry was applied to screen for AChE inhibitors in Nelumbinis plumula extracts. Seven compounds were identified as potent AChE inhibitors. Enzyme kinetic assays revealed that these ligands exhibit a mixed inhibition mechanism against AChE. Molecular docking demonstrated that the seven compounds effectively bound to the AChE active site, with binding affinities ranging from -9.7 to -8.5 kcal/mol. The established AChE@MIL-88B-NH 2 -based ligand fishing strategy provides a simple and efficient approach for screening potential AChE inhibitors from complex botanical matrices, offering a promising avenue for discovering novel therapeutic agents for AD.
研究领域:
神经药理学
·
酶学
·
药物发现
·
生物有机化学
·
分析化学
·
材料科学
·
植物化学
·
结构生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Hang Liu,Hua Yin,Xiaolong Yu,Minghan Zhu,Zhi Dang
In this work, the amino-functionalized metal-organic frameworks (MIL-88B-NH 2 ) was synthesized, characterized and used as heterogeneous photo-Fenton catalyst for tris-(2-chloroisopropyl) phosphate (TCPP) degradation. The photo-Fenton activity of MIL-88B-NH 2 was investigated on the basis of influence factors, such as initial pH and TCPP concentration, and coexisting impurities. The results revealed that MIL-88B-NH 2 +H 2 O 2 +Vis system exhibited a satisfactory degradation efficiency of TCPP (almost 100%) within 60 min accompanied by a good reusability. Noticeably, the degradation kinetics constant of TCPP by MIL-88B-NH 2 +H 2 O 2 +Vis system was 0.086 min −1 , which was visibly higher than that of MIL-88B+H 2 O 2 +Vis system (0.021 min −1 ) since the addition of amino-functionalized organic linker inhibiting the recombination rate of the photo-generated electron-hole pairs and improving the visible light response. Combined with the characterization, the conversion of Fe III to Fe II could be accelerated by the photo-generated electron from the excitation of Fe-O clusters and NH 2 functionalities, which strengthened the decomposition of H 2 O 2 and formed plenty •OH. Simultaneously, six steady products were validated and potential degradation pathways of TCPP were proposed. It was anticipated that MIL-88B-NH 2 could be considered as a desirable and alternative candidate in the application of heterogeneous photo-Fenton reaction to control the environmental risks caused by organophosphate flame retardants (OPFRs).
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Hui He,Yuexin Wang,Juan Li,Shanliang Jiang,Subhan Sidra,Wenxue Gong,Ying Tang,Yang Hu,Rule Wei,Dongxiao Yang,Xuesheng Li,Zhongxing Zhao
High light adsorption and fast charge separation are crucial for photo-Fenton catalytic activity of MOFs. Herein, bottom-up design was proposed to fabricate polypyrrole (PPy C ) nanowires in MIL-88B(Fe) cages as photo-Fenton catalyst for Sulfamethoxazole (SMX) efficient degradation. Pyrrole was prior anchored into MIL-88B(Fe) cluster via Fe-N coordination, and then the additional monomer pyrrole was further triggered bottom-up polymerization in confined cages of MIL-88B(Fe) and formed PPy C @Py-MIL(Fe) composite. These PPy C nanowires were dispersed in Py-MIL(Fe) cages and tightly connected with MOFs clusters via Fe-N bonding. Characterization proved that: (1) Interfacial Fe-N can significantly promote the efficient electron transport from PPy C nanowires to Py-MIL(Fe), enhance optical absorption property, and construct strong Lewis acidic sites and ligand vacancies in PPy C @Py-MIL(Fe). (2) The confined PPy C nanowire via Fe-N connection remarkably promote photo-generated electron-hole separation, Fe 2+ |Fe 3+ redox ability of MOF, and improved photo-electric corrosion ability. As a result, it significantly enhanced the photo-Fenton catalytic performance for SMX degradation. Catalytic oxidation was attributed to the generation of ‧OH species that oxidized 93% SMX in 60 min, showing ultra-rapid degradation and TOC removal rates of 33.7 min −1 ·mg·g −1 and 8.68 min −1 ·mg·g −1 respectively, which was about 4–220 times higher than those reported state-of-the-art catalysts. Additionally, the PPy C @Py-MIL(Fe) catalyst showed minimal loss in catalytic activity even after recycling for 10 times, exhibiting good recycling stability compared to many MOFs. Systematic analysis shown that in-situ anchored growth of polypyrrole in confined porous cages of MOF can effectively enhance the catalytic activity and stability of MIL-88B(Fe), and has great development potential applications for photo-Fenton catalytic degradation of organic pollutants.
研究领域:
环境科学
·
材料科学
·
催化
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Wenlan Ji,Xinyu Miao,Tian C. Zhang,Yuan Wang,Shaojun Yuan
The elimination of arsenic pollution has attracted increasing concerns due to its toxicity and severe carcinogenicity. Herein, we proposed an in-situ crystal growth strategy without surfactant to fabricate MIL-88B uniformly anchored on the surface of MnO 2 /GAC (MIL-88B/MnO 2 /GAC). Such innovative MIL-88B/MnO 2 /GAC nanostructured composites not only exhibited the synergetic functions of simultaneously oxidizing As(III) and adsorbing the generated As(V), but also effectively reduced the cost of metal–organic frameworks (MOFs) adsorbents. Impressively, the as-prepared sample achieved remarkably boosted As(III) removal capacity of 15.13 mg g −1 compared to 4.1 mg g −1 of MnO 2 /GAC composite and 2.1 mg g −1 of GAC , which was mainly ascribed to the synergistic effect between the excellent adsorption abilitiy of MIL-88B and oxidation property of MnO 2 /GAC. Owing to the unique construction and properties, the constructed MIL-88B/MnO 2 /GAC composites presented a desirable As(III) removal ability under a wide pH scope of 2 to 10. Moreover, the possible mechanism of the synergistic removal over MIL-88B/MnO 2 /GAC was elucidated by X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR) and radical trapping experiment. This work not only offers a superior bifunctional catalyst for high-efficient removal of arsenic, but also provides a new perspective for rational construction of MOF derivatives for their further applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Shusu Shen,Qifeng Fan,Honglin Li,Lunbo Xu,Ganwei Zhang,Renbi Bai
Developing a stable MOF-modified membrane for efficient treatment of oily wastewater remains a challenge. In this study, NH 2 -MIL-88B(Fe) (NM88B) was deposited on the commercial polyvinylidene fluoride (PVDF) membranes, and grafted with perfluorohexane-1-sulfonic acid potassium salt (PFHx) to achieve quaternization modification. This reaction proceeds in an environmentally friendly manner due to the absence of any catalyst. The introduction of fluorine atoms through grafting PFHx resulted in the modified PVDF membrane (NPF) demonstrating remarkable underwater superoleophobic property with an underwater oil contact angle at ∼180°. In separation of various oil-water emulsions, the NPF membrane afforded a high permeation flux (up to 2043 L·m −2 ·h −1 ) and rejection rate (∼99 %). The oil rejection of NPF membrane was >99 % after 10 filtration cycles of n -hexadecane-water emulsion, and the pure water flux of the recovered membrane was kept at 82.65 % of the original flux, indicating a very good reusability and stability. Filtration of mixed dye/oil-water emulsions showed that the NPF membrane remove 99 % of both oil and dye from the mixture. This work provides a simple and stable modification of PVDF membrane, exhibiting remarkable underwater superoleophobicity and hydrophilicity , thereby harboring substantial prospects in the treatment of oily wastewater.
研究领域:
材料科学
·
环境工程
✓ 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）