MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Lulu Cui,Weijie Shi,Houshen Li,Xiuxian Zhao,Shiyun Ai,Xiangju Meng,Shuhong Sun,Zeyi Guo
For bimetallic nanozymes, the closeness between the two elements is closely related to their properties, but achieving tight contact between the two components still faces challenges. Herein, copper was introduced by the coordination effect between the organic ligand in Ce-MOF and Cu 2+ , then a series of Cu-CeO 2 nanozymes were obtained by thermal treatment. The content of copper can be easily controlled and the spindle-shaped structure assembled by multilayer flakes can be obtained. The total antioxidant capacity (TAC) detection program based on the excellent peroxidase (POD)-like activity of the as-prepared Cu-CeO 2 nanozyme showed a wide linear detection range and ideal detection limits for ascorbic acid (AA), glutathione (GSH), Trolox and cysteine (Cys). More importantly, this method can be applied in TAC detection of commercial samples. This work provided a method for the design of high performance bimetallic nanozymes and developed a sensor that can be applied to detect TAC in vitamin C tablets and beverages.
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BIOSENSORS & BIOELECTRONICS
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2024
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IF 10.7
Qiulin Chen,Sheng Li,Xiaoyan Tu,Xinfeng Zhang
The pH of human sweat is highly related with a variety of diseases, whereas the monitoring of sweat pH still remains challenging for ordinary families. In this study, we developed a novel dual-emission Tb-MOF using DPA as the ligand and further designed and constructed a skin-attachable Tb-MOF ratio fluorescent sensor for real-time detection of human sweat pH. With the increased concentration of H + , the interaction of H + with carbonyl organic ligand leads to the collapse of the Tb-MOF crystal structure, resulting in the interruption of antenna effect, and correspondingly increasing the emission of the ligand at 380 nm and decreasing the emission of the central ion Tb 3+ at 544 nm. This Tb-MOF nanoprobe has a good linear response in the pH range of 4.12–7.05 (R 2 = 0.9914) with excellent anti-interference ability. Based on the merits of fast pH response and high sensitivity, the nanoprobe was further used to prepare flexible wearable sensor. The wearable sensor can detect pH in the linear range of 3.50–6.70, which covers the pH range of normal human sweat (4.50–6.50). Subsequently, the storage stability and detection accuracy of the sensors were evaluated. Finally, the sensor has been successfully applied for the detection of pH in actual sweat samples from 21 volunteer and the real-time monitoring of pH variation during movement processing. This skin-attachable Tb-MOF sensor, with the advantages of low cost, visible color change and long shelf-life, is appealing for sweat pH monitoring especially for ordinary families.
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Sustainable Energy & Fuels
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2024
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IF 5
Yuting Wu,Keru Cao,Jun Yan,Yuheng Zhang,Biao Zhang,Yanan Wang,Yong Yang,Dacheng Zhou,Qi Wang,ChunXia Liu
Electrochemical detection techniques are unable to accurately distinguish isomers with similar structures and properties due to the poor stability and selectivity of some sensors and their susceptibility to environmental interference. Bimetallic synergistically synthesized MOF materials have various types of highly ordered pores and can be used as adsorbent materials and catalyst carriers. Therefore, a composite material was developed to prepare its derivative Cu/Bi@C using a bimetallic organic skeleton (Cu/Bi-MOF) as a precursor, inheriting the large number of active sites on the surface of the MOF and large surface area, while improving the electrochemical response signal. The morphology and structure of the synthesized Cu/Bi@C composites were tested and analyzed by XRD, SEM and other characterization methods, and the electrochemical response of the Cu/Bi@C nanocomposites was analyzed by using an electrochemical workstation. In this study, a simple and highly selective electrochemical method was developed for the simultaneous determination of catechol and catechol quinone. Differential pulse voltammetry (DPV) was used for the simultaneous detection of HQ and CC. The results showed that the Cu/Bi@C electrode was able to efficiently and highly selectively detect both isomers. The Cu/Bi@C electrode could detect HQ and CC in the range of 2–600 μM and 2–800 μM, respectively, under the detection environment of pH = 6.0. The detection limits were 0.08 μM and 0.11 μM (S/N = 3), respectively. The sensor was successfully applied to real samples and showed low detection limits, good recoveries, high selectivity, stability and reproducibility. This provides a new idea for electrochemical detection and is expected to be applied in several fields.
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TALANTA
·
2025
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IF 6.1
Jian Shi,Hongren Wang,Runcheng Liu,Jie Yan,Mingshun Jiang,Yuanze Xu,Zezheng Zhang,Haipeng Si,Sen Wang,Shouzhen Jiang
Metal-organic frameworks (MOFs), known for their high porosity and tunable properties, have attracted significant interest in enhancing the sensitivity and functionality of plasmonic optoelectronic devices. However, their application in surface plasmon resonance (SPR) fiber-optic sensors remains challenging due to difficulties in preparing and transfer of large-area two-dimensional (2D) MOFs. Here, a large-area continuous ultrathin MOF film was successfully fabricated using an interfacial synthesis strategy and seamlessly adhered to tilted fiber Bragg gratings (TFBG). The resulting 2D MOF film not only exhibited excellent optoelectronic properties, thereby enhancing the plasmonic response in the sensing region, but also, due to its exceptionally high specific surface area, facilitated molecular enrichment within the effective sensing region. Subsequently, gold nanoparticles (AuNPs) were uniformly grown in situ on the 2D MOF films, leveraging the localized surface plasmon resonance (LSPR) effect of AuNPs to amplify the sensing signal, which significantly improved the sensor's performance for trace analysis. Concurrently, the AuNPs and the MOF-constructed nanozymes facilitated ultrasensitive glucose detection through a cascade catalytic reaction, obviating the need for additional receptors. The prepared sensor demonstrates excellent detection capabilities for glucose and DNA molecules in complex biological samples, such as serum. It exhibits strong performance in stability, reproducibility, and scalability, and holds potential for transformation in industrial testing applications. This design fully leverages the synergistic effects among diverse materials, enhancing the sensor's detection capabilities and providing valuable insights for the development of next-generation sensors.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Chenghan Ji,Yuanjie Zhang,Zhuoyao Fang,Yi Ren,Weiming Zhang
Current research on heavy metal adsorbents primarily focuses on eliminating particular heavy metal ions. Nevertheless, there remains a pressing demand for adsorbents capable of efficiently capturing a wide range of heavy metals found in actual wastewater. We report a metal–organic framework (MOF-808-NTA) functionalized with aminotriacetic acid (NTA), which has broad-spectrum capabilities for capturing heavy metal ions. Experiments with 15 distinct heavy metal ions, including hard (e.g., Cr 3+ ), soft (e.g., Hg 2+ ), and borderline Lewis metal ions (e.g., Pb 2+ ), found that the material achieved over 99 % removal efficiency in both individual ion and single-ion scenarios. Importantly, MOF-808-NTA exhibited ultrafast adsorption kinetics (removal >99 % within 30 s) for multiple metal ions, including Cr 3+ , Hg 2+ , and Pb 2+ , excellent selectivity (removal >95 %) when competing substances like Na + , Ca 2+ , and humic acid; and remarkable recyclability (removal >97.5 % after 5 cycles). Furthermore, spectrum analysis and theoretical calculation calculations indicate that the NTA groups in MOF-808-NTA serve as the primary sites for adsorption. The nitrogen and two oxygen atoms within the NTA groups create claw-like structures, which ensure exceptional capture of heavy metal ions. This work underscores the promise of MOF-808-NTA to function as a versatile material for capturing diverse heavy metals from wastewater.
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Materials Today Chemistry
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2024
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IF 6.7
Wenyu Dong,Zhaoshun Liu,Hongbin Sun,Zhongning Shi,Junli Xu
Ni-MOF shows high specific capacitance and rate capability performance as supercapacitor cathode, but it still exhibits poor intrinsic conductivity and cycle stability. Herein, we explore a bind free structural stabilized NiFe-MOF on nickel foam via one-pot solvothermal method for high performance supercapacitor . Various characterization results reveal that the prepared NiFe-MOF is composed of defective ultrathin nanosheets . The incorporation of Fe ions nodes can not only enhance the Ni-MOF cycle stability, but also increase the specific capacitance attributed to the formation of defects. The optimized NiFe-MOF exhibits an ultra-high specific area capacitance (15.6 F cm −2 at 2 mA cm −2 ) with excellent cycle stability (86.3 % cycle retention rate in 5000 cycles at 50 mA cm −2 ) in 1 mol L −1 KOH. The asymmetric supercapacitor (ASC) device constructed by NiFe-MOF/NF cathode and activated carbon (AC) anode achieves a high energy density of 0.75 mWh cm −2 and a power density of 8.0 mW cm −2 . Our work provides an important strategy for the designing of high-performance energy storage material .
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Jinzhe Chang,Xuehua Shao,Xin Wang,Jun Liu,Jian Wu,Muhammad Zeeshan,Shiqi Zhu,Pengpeng Liu,Xiaoran Miao,Pengrui Du,Zhixiang Zhang,Peiwen Zhang
The development of novel, safe, and efficient pest and disease control technologies for agricultural crops remains a pivotal area of research. In this study, by combining ZIF-8 and ZIF-90, a water-stable, pH-responsive bilayer MOF nanoparticle (NP) named Z8@Z90 was created, and tebuconazole (TEB) was added to form T@Z8@Z90, used for controlling peanut southern blight. The loading efficiency of TEB within the T@Z8@Z90 reached 26.15%, enabling rapid release in acidic environments triggered by oxalic acid (OA) secreted by Sclerotium rolfsii. In vitro experiments showed that T@Z8@Z90 can regulate the oxalic acid secretion of S. rolfsii and destroy its cell membrane structure. Additional experiments revealed that T@Z8@Z90 reduced sclerotial formation, decreased the total protein content of sclerotia, and influenced their sensitivity to pesticides, thereby mitigating the risk of reinfection by S. rolfsii. Notably, T@Z8@Z90 exhibited efficient translocation within peanut seedlings, being absorbed through the roots and transported to the leaves. At a concentration of 200 mg/L, T@Z8@Z90 exhibited high safety profiles for peanut seedling growth compared to the TEB suspension. Moreover, T@Z8@Z90 is safer for earthworms than TEB SC. Overall, this study offers valuable insights for the management of soil-borne diseases in agriculture and contributes to the advancement of sustainable agricultural practices.
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FOOD CHEMISTRY
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2024
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IF 8.5
Jiayi Wang,Shufang Zhou,Futai Lu,Shuo Wang,Qiliang Deng
Active antibacterial materials play an important role in solving food safety problems caused by pathogen contamination. In this study, a composite active antibacterial material with the synergistic antibacterial effectiveness of photothermal, photodynamic and the surface charge of polyphenols was developed, where the multi-porous polyphenol functionalized metal–organic frameworks (ZIF-8-TA) were used as the framework carrier, and black phosphorus quantum dots (BPQDs) were used as the photosensitive source. The resulted ZIF-8-TA/PBQDs possesses excellent photothermal conversion efficiency (27.92%), photodynamic performance and surface charge, and these factors ensure the outstanding broad-spectrum antibacterial performance (100%). Multifunctional characteristics and excellent biocompatibility endow the materials with vast potential for foodstuff packaging. The results showed that the composite antibacterial film produced by doping ZIF-8-TA/PBQDs into chitosan could effectively prolong the shelf life of foodstuff compared with commercial membrane. The successful implementation of this research provides a new idea for controlling microbial contamination and developing multifunctional antibacterial materials.
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TALANTA
·
2025
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IF 6.1
Shuojiang Liu,Gongke Li,Yuling Hu
The integration of surface-enhanced Raman scattering (SERS) and nanozymes has proven to be a highly effective strategy in bioanalytical applications, owing to its superior capabilities in signal transduction and amplification. Nevertheless, clinical applications still face obstacles, particularly in achieving sufficient selectivity. In this work, we have presented a SERS strategy for the selective detection of dopamine in human urine with MOF-818 which exhibits selective catechol oxidase-like activities. AgNPs@MOF-818 catalyze the oxidation of o -phenylenediamine (OPD) to diaminobenzazine (DAP) molecules, when dopamine (DA) is present, the oxidation of OPD is inhibited while DA is catalyzed into o -quinones, thereby suppressing the SERS signal intensity. An indirect SERS detection strategy of dopamine with high sensitivity and selectivity was established. The catechol oxidase-like activity of MOF-818 provides ideal selectivity to dopamine, while the OPD-dopamine catalytic system induces significant changes in SERS intensity. The detection protocol was subsequently optimized to achieve high sensitivity for dopamine, yielding a linear response range of 0.1–30 μmol/L and a low limit of detection (LOD) of 0.04 μmol/L. The method was successfully applied to the quantitative analysis of dopamine in human urine samples, demonstrating excellent recovery rates and minimal relative error in comparison with results obtained by commercial dopamine ELISA kit. This strategy presents a cost-effective, efficient, and accurate approach for dopamine detection while delivering insights into the integration of selective multifunctional nanozymes with sensitive SERS technique.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Jinshan Chen,Qiao Zeng,Shuangyou Bao,Fei Wang,Chi Wang,Kai Li,Yi Mei
Designing efficient and selective photocatalysts for CO 2 conversion under mild and practical conditions remains a significant challenge. This study aims to establish a sustainable strategy for constructing MOF-derived TiO 2 @TPA hybrids that enable efficient charge separation and selective CO 2 -to-CO conversion under low CO 2 concentrations without sacrificial agents. To achieve this, a TiO 2 @TPA hybrid material was synthesized via in-situ hydrothermal transformation of MIL-125(Ti) in water at 100 °C, without the use of organic solvents or high-temperature calcination. The resulting composite integrates TiO 2 nanocrystals with polymeric terephthalic acid (TPA) through Ti–O–C bonds, forming a stable interface that promotes ligand-to-metal charge transfer (LMCT). This interfacial structure enhances visible-light absorption and facilitates efficient charge separation. When applied to photocatalytic CO 2 reduction under low CO 2 concentrations (∼10 %), the TiO 2 @TPA hybrid achieved highly selective CO generation without the need for sacrificial agents or photosensitizers. In situ infrared spectroscopy and surface photovoltage analysis revealed the formation and stabilization of *COOH intermediates, elucidating the enhanced reaction pathway. This study demonstrates a scalable strategy for constructing MOF-derived hybrid photocatalysts and provides insights into interfacial design for selective CO 2 separation and conversion.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Songshan Jiang,Lin Xu,Fan Wu,Rui Wen,Meiling Yang,Bai He,Wei Xiong,Huan Yi
The development of stable and efficient MOF-based photocatalysts is essential for the treatment of high-strength dye wastewater. In this study, Ag/Ag 2 O@MOF-808 surface heterojunction photocatalysts were synthesized by a low-temperature impregnation calcination method. Comprehensive structural analyses (XRD, FT-IR, SEM, TEM, BET, H 2 -TPR, XPS) confirmed successful silver loading without damaging the MOF-808 framework. By adjusting the calcination temperature, both Ag 0 and Ag 2 O were introduced to form surface heterojunctions with MOF-808. UV–vis DRS and valence band XPS showed that Ag 2 O reduced the band gap and valence band position, improving light absorption and charge separation. The optimized catalyst (10 wt% Ag, 150 °C) achieved 98.1 % degradation of Rhodamine B (25 mg/L) under UV light within 60 min and maintained 88.8 % efficiency (within 180 min) at 100 mg/L. The catalyst exhibited excellent reusability with 0.417 % Ag + leaching and over 73 % activity retention after four cycles. Radical scavenging experiments identified superoxide radicals as the dominant reactive species. The enhanced performance is attributed to the synergistic effect of Ag 2 O as the active phase, Ag 0 as a conductive bridge, and MOF-808 as a stable support. This work offers a controllable, oxidant-free strategy for efficient photocatalytic degradation of hazardous dyes in wastewater.
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Materials Today Chemistry
·
2025
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IF 6.7
Xiaotong Song,Junyuan Zhang,Weiqi Li,Huanying Li,Zhiguo Li,Xiaolong Xu,Changyu Liu,Jianbo Jia
Metal-organic framework (MOF)-derived carbon nanocomposites have been widely applied in electrocatalytic fields due to their simple synthesis, excellent conductivity, and high catalytic activity. In this study, ZIF-67 and MIL-101(Fe) were synthesized via liquid-phase precipitation and solvent thermal methods, respectively. Then, the two kinds of MOFs were ground and calcined with melamine to prepare flower-like carbon nanocomposites. Under the optimal conditions, the oxygen reduction reaction (ORR) onset potential (E onset = 1.019 V vs. reversible hydrogen electrode, RHE) and half-wave potential (E 1/2 = 0.866 V) of this prepared composite are both higher than those of commercial Pt/C catalyst (E onset = 0.971 V, E 1/2 = 0.838 V). The prepared nanocomposite exhibits a lower oxygen evolution reaction (OER) overpotential (η = 338 mV at 10 mA cm −2 ) than RuO 2 (η = 372 mV), demonstrating superior catalytic performance. The prepared nanocomposite achieves simultaneous enhancement in both ORR and OER bifunctional catalytic performances. The power density of a zinc-air battery (ZAB) assembled with the optimal nanocomposite was 2.65 times higher than that of the Pt/C + RuO 2 system. This study establishes a fundamental framework for the rational design of high-performance ORR/OER bifunctional catalysts, while pioneering new avenues for ZAB technology commercialization.
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