ANALYTICA CHIMICA ACTA
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2023
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IF 6.2
Xiang Li,Xiaofeng Lu,Xiaojing Liang,Zhimin Yang,Shuai Wang,Yong Guo
Background Large accumulations of pesticide residues in the environment eventually enter the human body with food. Based on magnetic solid-phase extraction (MSPE) technology , it is possible to achieve efficient extraction of trace pesticide residues in foodstuffs, and the construction of MSPE adsorbents with excellent magnetic properties and many active sites is still one of the main research topics. Based on this, we developed a new strategy for the preparation of "MOF-on-MOF" composites, which were carbonized and used as adsorbents for the extraction of pesticide residues in cereals. Results A novel corn cob core-shell composite Fe 2 O 3 @C@ZIF-8 was created by embedding ZIF-8 onto the surface of Fe 2 O 3 @C derived from MIL-88A(Fe), and used for the extraction of benzoylurea insecticides(BUs) from cereals. The adsorption behaviour between Fe 2 O 3 @C@ZIF-8 and BUs was investigated by static and kinetic experiments and the adsorption mechanism was elaborated. For the trace analysis of BUs, a magnetic solid-phase extraction combined with high performance liquid chromatography-ultraviolet detector (HPLC-UV) approach was also developed. Under the optimized experimental conditions, the limits of detection and quantification were 0.015–0.03 μg L −1 and 0.05–0.1 μg L −1 , and the relative standard deviations for the intra-day and inter-day ranges were 1.82%–2.13 % and 3.85%–4.59 %, respectively. The spiked recoveries of the four cereals ranged from 82.72% to 104.45 %. After 10 cycles of use of Fe 2 O 3 @C@ZIF-8, the recoveries of BUs ranged from 77.90% to 96.74 %. Significance The analytical method based on Fe 2 O 3 @C@ZIF-8 as adsorbent has a low limit of detection, a wide linear range and is highly applicable to the analysis of real samples. In addition, the strategy developed in this study for the preparation of thermoplastic polymer-assisted "MOF-on-MOF" composites has promising applications.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
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2024
·Vol. 12
·期 12
·7178-7186
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IF 10.7
Haiyuan Li,Dingxin Liu
In photocatalysis, catalysts are crucial for effective charge transfer and separation. Using Mo-MOF and CdCo-MOF as precursors, we have designed an effective Cd0.76Cd0.17Mo0.07S (Ethy-CCMS) photocatalyst. We compared the performance of samples prepared in different environments and found that the rod-shaped Ethy-CCMS prepared in an alkaline environment provided by ethylenediamine exhibited the highest photocatalytic hydrogen production activity with an efficiency of 30.14 mmol g−1 h−1, which was 32.2 times higher than that of the CdS prepared under aqueous solution conditions. The solid solution formed can accelerate the separation of photogenerated electrons and avoid the formation of high oxidation power h+ compared to CdS alone. In addition, adding Mo and Co enables these three metals to form bonds with S. The shared S-bond improves the stability of the material and significantly mitigates the photocorrosion phenomenon. This study investigates the role of sulfides derived from Mo-MOF and CdCo-MOF as sustainable and promising co-catalyst candidates to enhance the photocatalytic performance of CdS-based composites.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
TALANTA
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2024
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IF 5.6
Yingao Yang,Zixuan Zhou,Tao Wang,Daoming Tian,Shuyue Ren,Zhixian Gao
We explored a novel preparation method for MOF-on-MOF heterostructured material (Zn-BTEC@ZIF-8). This prepared heterostructured material acts as a container, capable of adsorbing tetracycline hydrochloride molecules into its backbone through hydrogen bonding and π-π interactions. This phenomenon triggers an aggregation induced emission (AIE) effect, leading to the formation of luminescent bodies. The coordination between histamine and MOF was found to collapse the originally stabilized MOF-on-MOF structure. This collapse causes the splitting of the initially stabilized MOF-on-MOF structure from the aggregated state into fragments, resulting in the quenching of fluorescence in the fluorophore. Remarkably, the fluorescence quenching efficiency of this composite surpasses that of single-layer metal−organic framework (MOF) zeolitic imidazolate framework-8 (ZIF-8) or zinc-based MOF of pyromellitic acid (Zn-BTEC), enabling more sensitive detection of histamine. In this investigation, we constructed a label-free fluorescent sensor specifically designed for the detection of histamine, capitalizing on the AIE effect inherent in MOF-on-MOF architecture and the presence of tetracycline hydrochloride (Tet). The sensor demonstrates a rapid, straightforward, and stable response, allowing for histamine detection within 20 min. Notably, the sensor covers a detection range of 2–400 mg L −1 , achieving a low detection limit of 1.458 mg L −1 The practical application of this sensor for quantitative detection of histamine in river water and various fish species exhibited robust performance, ensuring reliability and accuracy in real samples. Its potential application in food safety and environmental monitoring is evident, making it a valuable tool for addressing histamine-related challenges in these domains.
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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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2025
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IF 4.1
Sumin Xu,Wenjing Liu,Jiajia Zhang,Jianying Qu
In this work, a MOF-on-MOF synthesis strategy was employed to successfully prepare (ZIF-8)-on-(CoCu-MOF) composites, which were further pyrolyzed at high temperature to obtain CoCu-CN nanomaterials. The morphological and structural properties of the materials were systematically investigated using SEM, FTIR, XRD and XPS. A novel sensor of CoCu-CN/GCE was constructed at a glassy carbon (GC) substrate, which exhibited excellent electrocatalytic activity to redox reactions of acetaminophen (PA) and p-aminophenol (4-AP). Under optimal conditions, the CoCu-CN/GCE sensor can be employed to detect simultaneously PA and 4-AP in the wider linear ranges of 0.05–270.00 μM and 0.05–170.00 μM, respectively with the lower detection limits of 0.020 μM and 0.019 μM respectively. Practical sample analysis for pharmaceutical and lake water gave satisfactory results. The proposed sensor displays excellent selectivity and stability with potential analytical applications
研究领域:
材料科学
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分析化学
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电化学
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产品关联
DOI
高影响因子
Molecular Catalysis
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2024
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IF 3.9
Pushuang Xing,Cong Li,Yixin Chen,Rong-Lan Zhang
PMoV 2 was encapsulated in four MOFs (MIL-101, HKUST-1, UiO-67, ZIF-8) with different cavity sizes and window sizes using a hydrothermal synthesis method. Then, a layer of mesoporous silica was coated on the surface of the MOFs to obtain four designed three-layer encapsulated catalysts 30%PMoV 2 @MOF@mSiO 2 . The physicochemical properties of the catalysts were characterized through various characterization methods, and the influence of different MOF window sizes of the four catalysts on the removal rate of four thiophene sulfides was investigated. The optimal reaction conditions were also explored for the optimal catalyst. The results indicate that under simulated fuel of 2400 ppm, 30%PMoV 2 @UiO-67@mSiO 2 owns the highest catalytic activity. Under optimal conditions, the total removal rate of four thiophene compounds was 91.52 %, and after ten cycles, the efficiency could still reach 86.24 %. This is attributed to the sufficient cavity size of UiO-67, which provides assurance for the loading of PMoV 2 and the large window size, making it possible for the smooth reaction between sulfides and PMoV 2 .
研究领域:
材料科学
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催化化学
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环境科学
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产品关联
DOI
高影响因子
TALANTA
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2024
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IF 5.6
Xiaolun Peng,Ruijie Xu,Fan Yu,Junhui Xu,Yazhen Wang,Shengfu Wang
Considering the close association between cardiac troponin I (cTnI) level and various cardiovascular diseases, it becomes essential to explore sensitive and accurate detection methods for monitoring their levels in the early stages of disease. In this work, a magnetic dual-aptamer electrochemical sensor for cTnI detection was constructed in the first utilizing MOF-on-MOF-derived electrocatalyst as a signal amplifier in collaboration with high-efficient separation of magnetic beads (MBs). Employing zeolitic imidazolate framework-67 (ZIF-67) with high surface area as host MOF, MOF-on-MOF heterostructure (ZIF-67@PBA) was facilely prepared by in-situ growth of conductive prussian blue analogue (PBA) as guest MOF onto the surface of ZIF-67 with a simple ion-exchange method. After low-temperature calcination, N doped derived electrocatalyst (N-ZIF-67@PBA) was obtained with intact skeletons and pore structures of MOFs. This not only integrated bimetallic active centers with various valence states and diversiform nanostructures of dual MOF, but endowed N-ZIF-67@PBA 8.3-fold increase of electrocatalytic activity for catalytic amplification. Further using aptamer-modified MBs as capture carriers for recognizing and separating cTnI from complex samples with high specificity, the magnetic dual-aptamer sensor successfully achieved the sensitive detection of cTnI with a low detection limit of 0.31 fg/mL. This work provided a new viewpoint on the use of MOF-on-MOF-derived electrocatalyst for ultrasensitive electrochemical sensing analysis.
研究领域:
生物医学工程
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分析化学
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产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
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2018
·Vol. 21
·期 1
·165-171
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IF 3.304
Yongwei Chen,Houxiao Wu,Qiangqiang Xiao,Daofei Lv,Feier Li,Zhong Li,Qibin Xia
Given the fact that solvothermal synthesis is the most common synthetic method to obtain metal–organic frameworks (MOFs) on a gram scale, it still remains a great challenge to produce MOFs in a scalable and sustainable synthetic process. In this work, we develop a facile and rapid synthesis of copper-based MOF-505 by the exploitation of layered (Zn,Cu) hydroxy double salt as the intermediate for efficient MOF-505 crystallization at room temperature, in which [(Zn,Cu)(OH)NO3] is synthesized by reacting ZnO with Cu(NO3)2. Under an optimized reaction time of 25 min, MOF-505-25 exhibits a Brunauer–Emmett–Teller (BET) surface area of 1076 m2 g−1 and the pore size is narrowly distributed at 5.9 and 8.0 Å. With respect to CO2 adsorption and separation performance, MOF-505-25 shows a moderate CO2 uptake of 3.51 mmol g−1 at 298 K and 100 kPa and high CO2/CH4 and CO2/N2 adsorption selectivities of 7 and 29. Particularly, the formation of MOF-505 can be completed within a short reaction time (less than 30 min) whilst maintaining high quality. This facile and rapid room temperature synthetic procedure would pave the way for promoting the development of MOF materials large-scale production with minimizing the energy input.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
RSC Advances
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2018
·Vol. 8
·期 42
·23671-23678
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IF 2.936
Ke Yang,Yu Yan,Wen Chen,Hongtao Kang,Yi Han,Wenquan Zhang,Yafeng Fan,Zhenxing Li
Nowadays, sulfur compounds in fuel oils are the main source of environmental pollution and ultra-deep desulfurization of fuel oils has become a top priority. Many porous materials such as activated carbon and metal–organic frameworks (MOFs) have attracted attention in the field of adsorption desulfurization in recent years. A series of novel MOF/hydroxylated graphene hybrid materials were successfully designed and synthesized with different ratios for application in the field of ADS. The hydroxylated graphene (HG) was found dispersed not just on the surface but also inserted in the MOF crystals in what we call a nut-like structure. It was found that the introduction of a small amount (<8%) of HG does not hinder the formation of the Cu-BTC structure. Meanwhile, the adsorption performances of these composites for thiophene from oils were evaluated using batch adsorption tests at room temperature. The synergistic effect between Cu-BTC and HG in the hybrid materials can improve the adsorption capacity for thiophene molecules. The experimental equilibrium curve fitted well with the theoretical Langmuir isotherm model. The maximum sulfur adsorption capacity of 35.6 mg S g−1 for the hybrid materials was calculated using the Langmuir adsorption equation, which increased by 48% compared to parent Cu-BTC. Thus, these hybrid materials have great potential for application in the adsorptive desulfurization process, especially for thiophenic compounds.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Yinchun Hu,Hui Yang,Renhu Wang,Menglan Duan
MOF-5 was prepared by hydrothermal method and Ag@MOF-5 nanoplates were obtained to improve the antibacterial activity and dispersion of Ag nanoparticles . MOF-5 and Ag@MOF-5 were characterized by scanning electron microscope (SEM), high-resolution transmission electron microscope and energy spectrum (HR-TEM&EDS), X-ray diffraction (XRD), infrared spectrum (FTIR) and thermal gravimetric analysis (TGA). MOF-5 was flaky crystals accumulated and complexed to form cube-like crystalline particles with the size of 20–50 micrometers, and it was destroyed in the process of loading nano-silver particles. Ag@MOF-5 nanoplates were nanoscale sheets, and 3–5 nm Ag nanoparticles were uniformly dispersed and loaded on nanoplates of MOF-5. The content of silver nanoparticles reached 13 wt% of Ag@MOF-5 total weight. The results of antibacterial experiment indicated that antibacterial ability of MOF-5 was limited, while Ag@MOF-5 showed good antibacterial ability to Escherichia coli and Staphylococcus aureus.
研究领域:
材料科学
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微生物学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2025
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IF 9.5
Heng Lin,Zhouheng Xia,Kunpeng Xue,Xiaojing Zhou,Yifan Yao,Na Ma,Wei Dai
To address the challenge of balancing adsorption kinetics and capacity for the capture and separation of PFOA, there is an urgent need for the development of MOF materials with defect-free crystal structures and a well-defined hierarchical “micro-mesoporous” pore structure. This will enhance the performance of fast adsorption rates, high adsorp-tion capacity, and high selectivity. In this study, we report a core-shell structure UiO-66-NH2-on-MIL-101(Cr) composite material, which achieves efficient PFOA ad-sorption and exceptional environmental stability through the synergistic effects of Zr4+/Cr3+ unsaturated metal sites, the amino-functionalization of UiO-66-NH2, and the optimization of high surface area (SBET = 1927 m2/g) with a hierarchical pore structure (micro- mesoporous cooperation). Density functional theory (DFT) calculations, com-bined with XPS and FT-IR analysis, reveal that the primary adsorption mechanism in-volves strong coordination interactions between the PFOA carboxylate groups and met-al clusters (Cr/Zr-O) (Eb = -178.02/-121.72 kcal/mol), supplemented by hydrogen bonding (O-···H-N/H-O), π-CF hydrophobic interactions, and electrostatic attraction (verified by changes in Zeta potential (Δζ = 36.1 mV) and electrostatic potential (ESP)). Batch experiments show that at pH = 3, an adsorbent dose of 14 mg, and room temper-ature (298 K), the composite material exhibits remarkable adsorption capacity (qmax = 860 mg/g), following pseudo-second-order kinetics and Langmuir adsorption isotherms. Thermodynamic analysis confirms that the adsorption process is exothermic (ΔH = -16.33 kJ/mol) and spontaneous (ΔG < 0), with the entropy-driven hydrophobic effect offsetting some of the exothermic contributions. In extreme environmental tests (pH = 2/12, 100°C boiling water), the composite maintains its crystal structure and adsorption performance (XRD/SEM), exhibiting a capacity retention rate exceeding 85% after five regeneration cycles. This study presents a new strategy for designing PFOA adsorbents with dual metal node electronic synergistic and coordination microenvironment optimi-zation, multi-scale topological stability construction, and molecular recognition mecha-nisms, offering significant environmental application value.
研究领域:
环境科学
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材料科学
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化学工程
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理论化学
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吸附技术
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DOI
高影响因子
Small Methods
·
2021
·Vol. 5
·期 8
·2100508
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IF 14.188
Ahmed Eissa Abdelmaoula,Jun Shu,Yu Cheng,Lin Xu,Gang Zhang,Yangyang Xia,Muhammad Tahir,Peijie Wu,Liqiang Mai
Solid-state lithium-ion batteries with high safety are the encouraging next-generation rechargeable electrochemical energy storage devices. Yet, low Li + conductivity of solid electrolyte and instability of solid–solid interface are the key issues hampering the practicability of the solid electrolyte. In this research, core–shell MOF-in-MOF nanopores UIO-66@67 are proposed as a unique bifunctional host of ionic liquid (IL) to fabricate core–shell ionic liquid–solid electrolyte (CSIL). In the current design of CSIL, the shell structure (UIO-67) has a large pore size and a high specific surface area, boosting the absorption amount of ionic liquid electrolyte, thus increasing the ionic conductivity. Nevertheless, the core structure (UIO-66) has a small pore size compared to the ionic liquid, which can confine the large ions, decreasing their mobility, and selectively boost the transport of Li + . The CSIL solid electrolyte exhibits considerable enhancement in the lithium transference number ( t Li + ) and ionic conductivity compared to the homogenous porous host (pure UIO-66 and UIO-67). Additionally, the Li|CSIL|Li symmetric batteries maintain a stable polarization of less than 28 mV for more than 1000 h at 1000 µA cm −2 . Overall, the results demonstrate the concept of core–shell MOF-in-MOF nanopores as a promising bifunctional host of electrolytes for solid-state or quasi-solid-state rechargeable batteries.
研究领域:
材料科学
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电化学
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能量存储
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Yinghui Xu,Xuan Zhao,Ran Chang,Hongqiang Qu,Jianzhong Xu,Jing Ma
Rationally regulating the separation pores is an effective way to achieve efficient separation membrane . However, the developed metal-organic framework (MOF) membranes for water treatment are all formed by one kind of MOF, which can only provide rigid pores, makes it difficult to achieve high flux and excellent rejection ratio simultaneity. Here, we proposed a facile strategy for the synthesis of heterogeneous MOF-on-MOF membrane with hierarchical pores, by site-specific grown ZIF-8 layer on UiO-66-NH 2 layer. Thus unique architecture of the obtained double-layered MOF membrane (UiO-66-NH 2 @ZIF-8) endows multidimensional separation pores: (i) the large pores of UiO-66-NH 2 can facilitate water transportation, (ii) the molecular-sieving pores of ZIF-8 can intercept dyes, (iii) UiO-66-NH 2 acting as active sites can promote the growth of ZIF-8. As a result, the optimized UiO-66-NH 2 @ZIF-8 membrane exhibits high flux (36.7 L m −2 h −1 bar −1 ) and excellent dye rejections (>97.0%). Through analysis and comparison, the regulated multi-type pores play an important role in membrane performance. Coupled with the facile membrane preparing method, this work can used as a potential approach of designing other advanced MOF membrane for water treatment.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）