SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Weining Liu,Xiaoyang Liu,Xi Tan,Mingyang Zhao,Zhao Liu,Ming Yi,Qi Ding,Yaqian Ren,Hairong Li
Triethylamine (TEA) presents considerable threats to public health and production safety because of its toxic and explosive nature, highlighting the urgent need to develop high-performance sensing materials. Traditionally, gas-sensing elements based on p-type metal oxide semiconductor (MOS) have been hindered by their intrinsically low carrier mobility, resulting in performance inferior to n-type MOS. Herein, we successfully constructed Cr 2 O 3 /TiO 2 -X (MCT-X) heterostructures through a in-situ MOF/MXene-derived strategy. The abundant porous nature, along with its increased specific surface area and numerous surface defects, facilitated the interaction between TEA and active centers. Meanwhile, the tightly coupled p-n heterostructures not only enabled rapid carrier migration but also exhibited a rare electron backflow effect. The multidimensional synergistic effects conferred upon MCT-X with excellent sensing properties. The optimal MCT-2 exhibited an outstanding response of 450.01 for TEA (100 ppm, 134 °C), along with superior selectivity, linearity, and stability. Density Functional Theory (DFT) calculations reveal in-depth explanation of the anisotropic charge transport mechanism induced by differences in crystal planes contacts and the sensitization mechanism of the heterostructure. This distinctive synthesis approach, combined with comprehensive mechanistic analysis, offers a strategy for the design of advanced TEA sensing materials.
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CARBON
·
2024
·
IF 10.5
Yuan Guo,Yuping Duan,Xiaoji Liu,Jie Tian,Ningxuan Wen,Zeng Fan,Lujun Pan
Graphene aerogels have attracted increasing attention in electromagnetic wave (EMW) absorption due to their ultra-low density and excellent dielectric performance. However, pure graphene aerogels have limited loss mechanisms, and it remains a challenge to introduce multiple loss mechanisms while maintaining lightweight. Here, reduced graphene oxide/metal organic framework (MOF)-derived carbon nanotubes (rGO/MD@CNTs) aerogels are successfully constructed by uniformly compositing GO and MOF particles by hydrothermal treatment and further in-situ growing CNTs by chemical vapour deposition method. GO and MOF particles form strong bonding sites due to their interaction to construct the aerogel with excellent mechanical property, while magnetic loss is also introduced. The MOF-catalyzed CNTs not only contribute to the formation of interface and dipole polarizations, but also effectively regulate the conductivity to improve impedance matching. rGO/MD@CNTs aerogel integrates multiple losses and optimal impedance matching. With a filling ratio of 6 wt%, the aerogel exhibits an excellent reflection loss of −51.6 dB and a wide effective absorption bandwidth of 5.9 GHz. In addition, the aerogel shows good thermal stability and antifreeze properties. Therefore, this work provides an effective strategy for obtaining the aerogel with multiple losses for efficient EMW absorption, demonstrating the potential applications of rGO/MD@CNTs aerogel in complex environments.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Chennan Zhao,Xiuying Yang,Boyu Zhao,Zezhou Zhang,Wenjuan Guo,Ao Shen,Meiqi Ye,Wenyi Wang
In order to achieve effective separation and rapid degradation of toxic dyes, copper porphyrin/graphene oxide (Cu-TCPP/GO) composite membranes with structural stability were prepared. In this process, Cu-TCPP MOF was successfully synthesized by hydroxyl double salt active intermediates, which grow along the GO surface in different directions (the main direction is perpendicular to the GO base layer). The results showed that the CM3 composite membranes (GO-MOF: CNT = 2.5 : 1, wt%, PES substrate membrane) exhibited good membrane properties (permeation flux reached 26.24 L·m −2 ·h −1 ·bar −1 , with over 99 % rejection of Congo red) and excellent conductivity with R CM3 of 3.73 kΩ·sq −1 . Consequently, highly effective and rapid degradation of organic dyes was accomplished, e.g., 99.5 % of the Congo red was degraded in 10 min, and 94.8 % for methylene blue in 30 min, indicating a harmless treatment of dye wastewater. Furthermore, the composite membrane has maintained excellent stability and degradation ability in multiple cycle tests. The GO-MOF composite membrane provides a treatment method and design reference for clean water resources and environmental protection.
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ACS Applied Energy Materials
·
2024
·
IF 5.4
Wenqing Wei,Tingting Wei,Di Wang,Ka Wang,Zijing Guo,Hengdong Ren,Yong Zhou,Jian Chen,Xiaobing Xu,Xinglong Wu
Addressing the challenge of rapid electrolyte ion diffusion in supercapacitors is of paramount importance. The key lies in the meticulous design of electrode materials featuring tailored built-in electric fields to optimize ion diffusion and transfer kinetics. In this study, we embarked on the synthesis of a series of Co-doped Ni-metal–organic frameworks (Co:Ni-MOFs) with varying Co doping ratios, enabling us to regulate the inherent polarization electric field. By manipulating the Co dopant levels, we effectively induced the [NiN2O4] octahedral distortion in interlayers. This allowed for precise control of the polarization electric field, ultimately promoting the diffusion and transfer kinetics of electrolyte ions. Notably, in the case of Co:Ni-MOF-3 (with a molar ratio of approximately Ni/Co = 3:1), the cumulative built-in polarization electric field proved most conducive to the diffusion of electrolyte ions into the interior and pores of the material. This refined design resulted in a remarkable specific capacitance of 1515 F/g at a current density of 1 A/g for Co:Ni-MOF-3, surpassing the performance of most MOFs-based electrode materials reported to date. Our current approach unveils interesting insights into structural tuning and the enhancement of energy storage properties through MOFs, harnessing the potential of controlled doping and built-in electric field modifications.
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ACS Food Science & Technology
·
2024
·
IF 2.6
Haoran Bai,Liying Yang,Zheng Li,Douxin Xiao,Alideertu Dong
The infestation of pathogenic microorganisms leads to a decline in fruit quality and reduces their storage time. The existing methods for contact preservation suffer from the issue of migration of harmful ingredients, thus necessitating the development of novel preservation techniques. The present study focuses on the development of a contactless and biosafe solid preservative (GR@β-CD-MOF) by incorporating geraniol (GR, essential oil) into the β-cyclodextrin MOF (β-CD-MOF). The loading rate of geraniol was 210.8 mg/g. The morphology and structure of GR@β-CD-MOF were characterized using SEM, XRD, XPS, and FTIR. Furthermore, we evaluated the in vitro antimicrobial activity of GR@β-CD-MOF against three common food-borne pathogens Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and Botrytis cinerea (B. cinerea). Subsequently, the GR@β-CD-MOF was placed into poly(lactic acid) bags to prepare a solid preservative for emperor bananas. In comparison with the control group, the emperor bananas treated with GR@β-CD-MOF exhibited lower decreases in relevant physicochemical parameters including color, weight loss, and soluble solids content. Moreover, the shelf life of emperor bananas was extended up to 8 days. These findings validate the efficacy of GR@β-CD-MOF as a solid preservative for fruit preservation.
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FUEL
·
2024
·
IF 6.7
Chongchong Chen,Hexiang Gao,Hui Li,Mingchao Wang,Jie Zhang,Tengfei Li,Wenjia Wu,Zhirong Yang,Jingtao Wang
The poor water-stability and cross-layer proton transfer property pose a challenge to the lamellar metal–organic frameworks (MOFs) membrane when acting as a promising proton exchange membrane. Herein, we report an adipic acid-mediated strategy to improve the water-stability and the cross-layer proton conductivity of CuTCPP lamellar MOF membrane, which achieves a maximum power density and current density of 112.6 mW cm −2 and 424.4 mA cm −2 , respectively. Adipic acid with extra functional groups (–PO 3 H 2 , –COOH) stably bridges the adjacent crystal layers via the terminal carboxylic acid anchoring Cu sites. In particular, the extra functional groups introduced into the adipic acid regulate the allocation of hydrogen bonding networks in an umbrella-shape around adipic acid with copper-porphyrin structures as external margin, enriching the coherence of hydrogen bonding network on the proton transport path. Benefiting from the regular pore structure of MOF, the optimized hydrogen bonding networks in adjacent crystal layers construct a more abundant through-plane transfer pathway. The resultant through-plane proton conductivities of CuTCPP-PO 3 H 2 /–COOH membranes are up to 108/89 mS cm −1 at 80 °C and 100 % RH, which is ∼ 6-fold higher than that of the pristine CuTCPP membrane (13 mS cm −1 ), with a conductivity attenuation of < 5 % during a humidity cycling test for 12 times.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Ruyue Cong,Kaiyue Hu,Dandan Hu,Jingran Sun,Jinglu Yao,Zhiyong Guo,Sui Wang,Yufang Hu
The detection of UDG activity is essential for understanding DNA damage repair mechanisms, assessing cellular genetic stability, and advancing diagnostics and treatments for related diseases. An advanced electrochemical biosensor based on a silver-enhanced copper metal–organic framework (Ag@Cu-MOF) has been developed for the sensitive and selective detection of uracil-DNA glycosylase (UDG) activity in cellular environments. This design incorporates a prism substrate to stabilize the liquid phase on the electrode surface, with DNA probes immobilized on the prism surface. Upon UDG-catalyzed uracil excision, the probe undergoes structural changes, initiating a cascade reaction. The abundance of free DNA ends facilitates the approach of MOF materials to the electrode interface, creating a stable environment conducive to H 2 O 2 reduction, thereby amplifying the electrochemical signal. Comparative catalytic analyses revealed that the Ag@Cu-MOF-modified electrode, with its enhanced conductivity and high surface area, achieved efficient catalysis compared to Cu-MOF. The biosensor exhibited a linear response to UDG concentrations ranging from 0.00002 to 0.5 U/mL, with an impressively low detection limit of 0.00002 U/mL, highlighting its capability for quantitative analysis. The sensor demonstrated high selectivity, minimal interference from other biomolecules, and stable performance across multiple cycles, underscoring its robustness. Furthermore, UDG activity was successfully detected at varying cell densities and under hypoxic conditions, providing valuable insights into cellular DNA repair mechanisms and responses to stress. In summary, the Ag@Cu-MOF-based biosensor offers a promising platform for detecting UDG activity in cancer diagnostics and cellular research, with potential applications in monitoring DNA repair activities under both physiological and pathological conditions.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Hong Gao,Chen Wang,Wenqi Zhang,Guowei Shan,Weixing Li
Purification of glutathione (GSH) from fermentation broth is crucial for production process. Here, we built a new nanofiltration (NF) membrane to separate glutathione from amino acids, which mainly refer to glutamate (Glu) and glycine (Gly). An alendronic acid (AA)/Cu-MOF-74 nanorods arrayed interlayer is constructed on the substrate. The designed interlayer can adsorb a significant amount of piperazine (PIP), enhancing the reaction crosslinking degree of interfacial polymerization. The Cu-MOF-74 morphology contributes a wrinkled membrane surface structure with large specific surface area. The optimal NF membrane achieved the permeability of 7.13 L·m −2 ·h −1 ·bar −1 with high selective separation factor of 20.06, 25.88, 25.46 for GSH/Glu, GSH/Gly and GSH/NaCl, respectively. This work offers a potential solution to develop high-performance NF membranes for purification of biological molecules.
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Engineering Research Express
·
2024
·Vol. 6
·期 2
·025015
·
IF 1.5
Wenlong Deng,Linyu Mei,Yue Niu,Zicheng Zhang,Yunpeng Shao
Metal–organic framework (MOF) materials have been increasingly used owing to their high porosity, chemical stability, and semiconducting properties. With the help of MOF materials, MOF-based SERS substrates can exhibit high sensitivity. Herein, we proposed a flower-like Ag nanoparticles (AgNFs)/metal–organic framework (MOF)/ carbon fiber cloth (CFC) substrate-based surface-enhanced Raman scattering (SERS) sensor for the high-sensitive detection of dye molecules. MOF is used as a signal amplifier to accelerate the approach of dye molecules near AgNFs on the MOF surface and anchor AgNFs on the substrate surface. The detection occurred on the AgNFs/MOF/CFC SERS substrate, providing an enhancement factor (EF) of 5.53 × 107. Benefitting from the signal amplification function of AgNFs/MOF/CFC and the superiority of SERS, this sensor represented high sensitivity performance and a wide detection range. Importantly, the combination of Co elements with silver in the AgNFs/MOF/CFC composite substrate enhances the resistance of Ag to oxidation by atmospheric moisture resulting in excellent stability (the substrate maintained good SERS activity after 45 days of exposure to air) of the SERS substrate. The basic performance of the substrate was evaluated using rhodamine 6 G (R6G). (Detection limit reached 10−12 M) The detection limit of TC was 0.1 ppm. This method provides a potential and cost-effective strategy to develop advanced SERS sensing devices to effectively monitor pollutants in environmental waters.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Zhengchu Yue,Yanran Cheng,Qi Jiang,Xueyun Bai,Xiaolong Fang,Xinyu Zhao,Yao Yao,Didi Dong,Yuanyuan Che,Ganggang Chang
As a safe and efficient hydrogen storage material, ammonia borane (NH3–BH3, AB) shows great promise in the era of clean energy advocated by hydrogen. Thus, it is imperative to focus on the exploitation of high-performance heterogeneous catalytic systems for the effective utilization of hydrogen energy stored in AB. However, noble metal catalysts as high-efficiency systems suffer from high expenditure, and the traditional powder-based catalyst faces poor processability and recoverability. Herein, a bimetallic (Co/Ni) MOF-derived CoNiP/hierarchically porous carbon (HPC) monolithic aerogel was successfully prepared by the gelation–carbonization–phosphorization method and applied in the hydrolysis of AB. The ultrasmall transition bimetallic phosphide CoNiP nanoparticles were uniformly fabricated in the hierarchically porous aerogel after pyrolysis. Benefiting from the rapid mass transfer and high exposure of well-defined CoNiP-active species within the hierarchical aerogel support, the Co0.3Ni0.7P/HPC aerogel performed high hydrogen evolution activity and exhibited fast hydrogen generation rate with a completion time of 2 min under mild conditions. The theoretical calculations reveal the key effects of the adsorption energies between AB and water on CoNiP-active sites in the Co0.3Ni0.7P/HPC aerogel. Furthermore, the Co0.3Ni0.7P/HPC monolithic aerogel catalyst can be effortlessly separated and recycled at least 10 times without a remarkable loss of activity. The controllable design of P-doped bimetallic species in the porous aerogel herein should serve as the foundation for the preparation of practical functional monolithic applied catalysts for the hydrolysis of AB.
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CRYSTENGCOMM
·
2024
·
IF 2.6
Yang Zhou,Dan Wang,Qiuxiang Feng,Qi Wu,Feng Cao,Li Jiang,Qianli Zhang,Jie Liu
Synthesizing stable MOF materials with good adsorption capability in a relatively green way is well worth investigating. In this work, a stable Ce-UiO-66-NH2 MOF was constructed from Ce(IV) salts and a bifunctional ligand, 2-amino terephthalic acid, in a mixture of water and ethanol at room temperature. The MOF solid was fully characterized and its adsorption properties for methylene blue were investigated in detail. Ce-UiO-66-NH2 showed excellent removal ability of MB over a wide pH range, the adsorption process followed a pseudo-second-order kinetic model, and the isothermal adsorption data fit well with a Langmuir model with a maximum capacity of 427 mg g−1. Moreover, a spontaneous heat adsorption process was concluded from thermodynamic study, and this MOF sorbent can be reused for several cycles with its structural stability maintained. A possible mechanism for MB adsorption was also proposed.
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FOOD CONTROL
·
2024
·
IF 5.6
Yiting Zhou,Jingming Zhou,Yankai Liu,Yumei Chen,Hongliang Liu,Xifang Zhu,Peiyang Ding,Chao Liang,Enping Liu,Sixuan Wu,Aiping Wang
A novel electrochemical immunosensor for the sensitive detection of monensin (MON) was developed. The sensor platform utilized anti-MON monoclonal antibodies and a nanocomposite (Ce-MOF@AgAuNPs), composed of cerium-based metal-organic frameworks decorated with silver-gold nanoparticles. The physicochemical properties of the Ce-MOF@AgAuNPs nanocomposite were investigated using transmission electron microscopy, energy dispersive X-ray, UV–Vis spectrophotometry, and fourier transform infrared techniques. The stepwise fabrication process and electrochemical performance of the immunosensor were investigated through electrochemical impedance spectroscopy and cyclic voltammetry. The sensor exhibited excellent analytical performance for MON detection, with a wide linear response range from 0.05 to 250 ng mL −1 and a low LOD of 0.008 ng mL −1 . Additionally, the immunosensor exhibited high accuracy, with recovery rates ranging from 97.4% to 103.2% in chicken liver and 96.0%–104.7% in milk. This developed immunosensor shows great potential for food safety applications, demonstrating high specificity, stability, and reproducibility in the detection of MON.
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