ACS Food Science & Technology
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2026
·
IF 3
Zi-Jia Ji,Lei-Lei Wang,Xiao-Li Wang,Lu Liu,Xia Wang,Ru-Song Zhao
Aflatoxins (AFTs) pose a significant threat to the harvesting and storage of food crops and have adverse effects on human health. Combining metal–organic framework (MOF) materials and surface imprinting technology has been recognized as an effective strategy to fabricate selective adsorbents for the extraction of AFTs. In this study, molecularly imprinted MOFs (MI-d-UiO-66-NH2) were synthesized via surface imprinting. MI-d-UiO-66-NH2 exhibited selectivity toward AFTs owing to its abundant imprinted cavities and functional groups. The developed analytical method for AFTs, coupled with high-performance liquid chromatography tandem mass spectrometry, achieved low detection limits ranging from 0.001 to 0.150 ng mL–1. The recoveries of AFTs in four cereal samples spiked at three different concentrations (2.0, 5.0, and 10.0 μg kg–1) were 81.3% to 96.3%, with relative standard deviations of ≤9.5%. This study offers an effective approach for the accurate determination of trace AFTs in complex food matrices.
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CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Yaowen Wei,Jianwei Wang,Hao Guo,Tao Ban,Yufeng Yue,Di Hu,Haibao Huang
The direct conversion of methane (CH 4 ) into higher-value C2 products is essential for the green and efficient conversion of clean energy. However, this conversion process faces significant challenges due to the difficulty in activating methane's C–H bonds and the complexity of controlling C–C coupling reactions. Herein, we design and construct the unsaturated metal Zr 4+ site by introducing ligand defects in UiO-66 through treatment with trifluoroacetic acid (TFA), which enables the direct oxidation of methane to acetic acid using H 2 O 2 under mild conditions. Remarkably, a volcano-shaped correlation was observed between the degree of ligand defects in UiO-66 and acetic acid selectivity. Under optimal conditions (150 °C), the catalyst achieved an outstanding acetic acid selectivity of 84% with a high yield of 1691 μmol·g cat. –1 . Notably, the catalyst exhibited exceptional stability, maintaining its performance over at least five consecutive reaction cycles. Through TFA modulation, the d -band center of the Zr 3 d orbital in Zr 4+ sites exposed by UiO-66 shifts upward. This promotes the decomposition of H 2 O 2 , thereby facilitating the formation and stabilization of highly reactive Zr–OH species, which enhances the activation of C–H bonds in CH 4 . The resulting *CH 3 species is further oxidized by *OH species into *COOH species, which undergo stable C–C coupling at exposed Zr 4+ sites to produce acetic acid. This work provides novel insights into the design of highly efficient catalysts for the direct conversion of methane into C2 oxygenates compounds under mild conditions.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Mengying Lin,Hanyue Lou,Zhaoyang Qi,Jie Chen,Changshen Ye,Ting Qiu
The development of highly active catalysts is crucial for oxidative desulfurization (ODS) to meet the growing demand for sulfur-free fuels. In this study, a defect-rich composite catalyst UiO-DAlaPW was successfully synthesized via mechanochemical grinding, wherein phosphotungstic acid (HPW) was encapsulated within a defect-engineered UiO-66 framework, utilizing D-alanine (DAla) as a bridging molecule. The synthesized catalyst, UiO-DAlaPW, significantly enhances the utilization efficiency of hydrogen peroxide (H 2 O 2 ). In the model oil ODS system, the material exhibited exceptional catalytic performance: achieving deep desulfurization at room temperature within merely 5 min under conditions of extremely low acetonitrile cosolvent usage and a low oxidant/sulfur (O/S) ratio, accompanied by remarkably high H 2 O 2 utilization efficiency. Moreover, the catalyst maintained high desulfurization efficiency even in the absence of acetonitrile. Characterization by XRD, FT-IR, TGA, and XPS confirmed the successful encapsulation of HPW within the UiO-66 framework. Mechanistic studies revealed a significant synergistic effect between UiO-66 and HPW. The effective cooperation of the two active sites, namely Zr in UiO-66 and PW, significantly enhances the catalytic performance, contributing to superior oxidative desulfurization activity.
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CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 1.9
Yuanyuan Hu,Yan Tan,Huangqing Liao,Shiyan Long,Jie Huang,Hui Zhang,Gui Chen,Bailin Xiang
The environmental pollution resulting from organic dye wastewater presents a significant threat to human health. Photocatalysis has emerged as a highly promising approach for mitigating wastewater contamination. In this study, a novel synthetic strategy was developed using NH 2 -UiO-66 as a template. By precisely controlling the amount of Ag + ions introduced into the NH 2 -UiO-66 precursor and employing a straightforward reduction approach, the Ag-NH 2 -UiO-66 composite photocatalyst was successfully synthesized. Comprehensive characterization via X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray photoelectron microscopy (XPS) confirmed that the incorporated Ag+ ions were effectively reduced to metallic silver and uniformly dispersed within the porous framework. Photocatalytic degradation experiments employing Rhodamine B (RhB) as a model pollutant under ultraviolet irradiation demonstrated that the catalyst with a silver loading of 0.05 mol/L achieved a maximum degradation efficiency of 91% within 150 min, markedly surpassing the 39% efficiency exhibited by pristine NH 2 -UiO-66. Furthermore, cyclic stability tests verified the catalyst's excellent reusability and structural durability. Mechanistic investigations revealed that superoxide radicals (O 2 − ) served as the predominant reactive species responsible for RhB degradation in the Ag-NH 2 -UiO-66 system. This work presents a simple and effective strategy for fabricating highly efficient and stable MOF-based photocatalysts for the remediation of dye-contaminated wastewater.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2026
·Vol. 28
·期 2
·32
·
IF 2.6
Wang Hui,Chen Heng,Zhang Keying,Zhang Ziyang,Zeng Yan,Zhou Hangyue
In recent years, metal–organic frameworks (MOFs) have proven to be effective nanofillers for fabricating thin-film nanocomposite (TFN) membranes for dye wastewater treatment. In this study, University of Oslo-66 (UiO-66) was modified with polydopamine (PDA) to synthesize PDA@UiO-66 nanoparticles, aiming to overcome their inherent dispersion and compatibility limitations. Subsequently, TFN membranes incorporating PDA@UiO-66 (denoted as TFN-PDU) were fabricated via interfacial polymerization using an aqueous piperazine (PIP) solution containing well-dispersed PDA@UiO-66 and an organic trimesoyl chloride (TMC) solution. Owing to the suitable pore size, improved hydrophilicity, and enhanced compatibility of PDA@UiO-66, the prepared TFN-PDU membranes exhibited elevated water permeability, salt rejection, and dye desalination performance compared to the pristine thin-film composite (TFC) membrane and the TFN membrane containing unmodified UiO-66. The effects of different PDA@UiO-66 loadings on membrane morphology, structure, and performance were systematically investigated. Compared to the conventional UiO-66-incorporated TFN membrane (water permeability: 5.21 L·m −2 ·h −1 ·bar −1 ), the optimal TFN-PDU2 membrane (with 0.10 wt% PDA@UiO-66 loading) exhibited a higher water permeability of 6.85 L·m −2 ·h −1 ·bar −1 , an increased Na 2 SO 4 rejection (from 87.6% to 89.4%), and an enhanced methylene blue (MB) rejection (from 93.4% to 95.6%). This study provides a feasible strategy for designing high-performance TFN membranes using hydrophilic MOFs for efficient dye wastewater treatment.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 7
·492
·
IF 5.4
Shen Fei,Wang Sen,Yang Qian,Li Guanglei,Lin Xianchang,Chen Guanyao,Wang Ji,Sheng Rizhi
Endotoxins, specifically lipopolysaccharides (LPS), are components of the outer membrane of Gram-negative bacteria. Due to the fact that even extremely low concentrations of endotoxins can trigger the human body’s inflammatory cascade, there is an urgent need to develop highly sensitive detection technologies for accurate identification and quantitative analysis of trace amounts of endotoxin. This study, based on an electrochemical sensing platform constructed using AuNPs/NH 2 –UiO-66/PEI/MCNs functionalized nanocomposite materials, has successfully achieved efficient detection of endotoxins in food. Given the complex food matrix and numerous interfering substances, this sensor enhances its anti-interference capability through a multi-level cooperative interface design. It uses polyethyleneimine-modified mesoporous carbon nanospheres (PEI/MCNs) as the substrate and integrates the directional loading capability of NH 2 -UIO-66 with the conductivity-enhancing effect of gold nanoparticles (AuNPs), thereby significantly improving signal stability. This biosensor achieves a remarkable detection limit as low as 40 fg/mL, enabling trace-level identification of LPS. Additionally, it exhibits excellent selectivity against common foodborne interferents, facilitating rapid and accurate LPS detection.This study presents a novel, portable detection solution for the rapid screening of microbial contamination in food. The nanocomposite interface construction strategy employed herein provides significant guidance for developing trace-level hazard detection technologies in complex matrices. Graphical
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2026
·
IF 4.1
Ren Jia,Guo Hao,Yang Zeyun,Yan Ruixue,Ma Jianpeng,Niu Wenting,Wang Mingyue,Yang Wu
Nitrofurazone, a commonly used nitrofuran antibiotic, is widely applied in antimicrobial therapy as well as in aquaculture and livestock farming. However, its residues can pose risks to human health and cause environmental pollution. Therefore, the development of a highly sensitive detection method for nitrofurazone is of great significance. In this study, a novel core–shell composite material, UiO@TATF COF, was prepared by in situ growing TATF COF on the UiO-66-NH 2 surface through a Schiff-base reaction using 4,4′,4″-(1,3,5-triazine-2,4,6-triyl) tris(benzaldehyde) (TFPT) and 1,3,5-tris(4-aminophenyl) benzene (TAPB) as monomers. Subsequently, by further introducing the conductive material carbon black (CB), a novel electrochemical sensor UiO@TATF COF/CB/GCE was successfully constructed. Covalently linked UiO@TATF COF achieves a robust core–shell interface and possesses a large specific surface area and abundant active functional groups. The resultant sensor system exhibits clear synergistic effects, enabling electrocatalysis and sensitive detection toward nitrofurazone in food, environmental, and ointment samples with a detection limit of 0.05 µM ( S / N = 3). Graphical abstract
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Zhixin Zhang,Boxuan Zhai,Yan Gao,Juan Chen,Yuqiao Su,Yixuan Sun,Hongyi Gao,Ge Wang
Engineering the surface and interfacial architectures of nanomaterials is fundamental to bridging the gap between dispersion stability and tribological efficiency. Metal–organic frameworks (MOFs), characterized by their structural diversity and programmable surface chemistries, represent a burgeoning class of organic–inorganic hybrids for next-generation lubricant additives. Herein, we systematically decipher the synergistic interplay between metal-node identity (M = Ce, Zr, Hf) and surface amphiphilicity in steering the tribological behavior of UiO-type frameworks. Through precise amidation-induced grafting of gradient alkyl chains (C4/C8), we achieved nuanced control over surface hydrophobicity while maintaining structural integrity. Notably, the octanoic-functionalized Zr-UiO-66-NH2 exhibits exceptional lubrication performance in 500SN base oil; at a low loading of 0.2 wt %, it yields a 27% reduction in the steady-state friction coefficient and a remarkable 81% suppression in wear volume. Advanced surface analysis reveals that the alkyl-chain functionalization promotes the enrichment of aliphatic and carbonyl moieties at the sliding interface, effectively lowering interfacial adhesion and shear resistance. Furthermore, XPS depth profiling identifies a robust, protective tribofilm composed of MOF-derived inorganic clusters and organic decomposition products, which significantly enhances oxidative stability. This work provides a versatile strategy for the molecular-level engineering of MOF-based additives to meet the demands of high-performance lubrication technologies.
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Hang Yang,Qiankun Sha,Yixuan Wang,Xiaohui Lu,Chang Ma,Na Han
Efficient separation of organic dyes from inorganic salts in high-salinity textile wastewater remains a major challenge for resource recovery. Although graphene oxide (GO) membranes show promise for ion-sieving applications, their practical use is hindered by interlayer swelling, pore compaction, and the inherent permeability–selectivity trade-off. Here, a synergistic interlayer-engineering strategy based on a “skeleton–filler” architecture is proposed using CNT/UiO-66-NH 2 to regulate the GO/substrate interface. In this architecture, carboxylated multi-walled carbon nanotube (MWCNT-COOH) scaffolds, together with metal–organic framework (MOF) particles, effectively mask the macroporous defects of the substrate and suppress sagging of the flexible GO nanosheets. Meanwhile, the hierarchical interlayer creates low-resistance transport pathways, thereby generating a gutter effect and reducing mass-transfer resistance. Consequently, the optimized GCU-27 membrane delivers a high water permeance of 105.14 L·m ‒2 ·h ‒1 ·bar ‒1 , together with a high Congo red rejection of 99.91% and a low MgCl 2 rejection of 3.60%. As a result, a high separation factor of 1071.11 is achieved. In addition, GCU-27 shows good antifouling performance ( = 88.16%) and stable separation performance during 100 h of continuous operation at 70 °C. This work provides an effective interfacial-engineering strategy and mechanistic insight for the rational design of high-performance GO-based membranes for dye/salt fractionation.
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LANGMUIR
·
2026
·
IF 4.4
Yue Qiu,Yingying Ling,Yahong Yuan,Tianli Yue,Fei Lyu
Patulin (PAT), a hazardous mycotoxin found in fruits and their products, poses significant health risks. While UiO-66-NH2 has been primarily explored as an adsorbent or carrier for mycotoxin removal, this study investigates its previously underexplored role as an oxidase-mimicking nanozyme for PAT degradation. UiO-66-NH2 achieved a maximum degradation efficiency of 84.01% within 48 h and 97.63% after 96 h. Mechanism studies revealed that the Zr–O cluster activates O2 to generate reactive oxygen species (·O2– and ·OH), which mediate the oxidative opening of the lactone and furan rings in PAT. The −NH2 enhances both PAT affinity and electron transfer of UiO-66. Three-dimensional fluorescence and LC-MS/MS analyses identified four degradation products (C7H7O5, C7H9O7, C4H5O5, and C3H5O3), enabling the proposal of a plausible degradation pathway. Applied to apple juice, UiO-66-NH2 removed 85.29% of PAT in 72 h, with a negligible impact on juice quality. This work offers an efficient nanozyme-based strategy for PAT detoxification in food applications.
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Journal of Energy Storage
·
2026
·
IF 10.7
Shang Wu,Qiyue Tong,Huize Zhang,Zhenyang Yu,Chenxu Zhu,Qiong Su,Hong Zhang,Guihua Li,Xiaojun Yang,Juzhen Kang,Quanlu Yang
NH 2 -UIO-66 has been regarded as a promising porous material owing to its high specific surface area and structural stability, although its limited conductivity restricts its application in supercapacitors. In this work, a NiCo 2 S 4 /NH 2 -UIO-66 nanoflower composite (NCS/NU) was synthesized via a vulcanization process with thioacetamide. Electrochemical measurements conducted in a three-electrode system revealed that the composite delivered a specific capacitance of 172.4 mAh g −1 at 1 A g −1 and maintained 82.1% of its initial capacitance after 5000 cycles at 5 A g −1 . Morphological characterization indicated that the nanoflower architecture was largely preserved after sulfurization. The in-situ formed NiCo 2 S 4 contributed to enhanced pseudocapacitance and induced surface wrinkling of the petals, which helped stabilize the composite structure supported by NH 2 -UIO-66. For the anode, S and N co-doped three-dimensional porous carbon (SNC) was prepared via a sol-gel method followed by stepwise high-temperature carbonization using ammonium persulfate as the activator. A hybrid supercapacitor was subsequently assembled with the NCS/NU as the positive electrode and SNC-700 as the negative electrode. The device delivered an energy density of 28.8 Wh kg −1 and retained 74.1% of its initial capacitance after 5000 charge-discharge cycles.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Xinjia Zhang,Yanchao Li,Jianguo Mi,Xiuqing Kang,Junsu Jin
Atmospheric water adsorption at low humidity is considered to be a major challenge in solving global water problems. As a routine water adsorbent, the University of Oslo-66 (UiO-66) powder has been restricted by its limited low-pressure water absorption capacity, the need for powder molding, and insufficient adsorption rates. To overcome these problems, this work prepares E-UiO-66@PAA spherical composites by crystallizing UiO-66 on the surface of macroporous polyacrylate, i.e. PAA porous spheres, through in situ confined growth and ligand exchange strategies. The average size of the crystals has been reduced by 4 times vtihe nanoscale roughness of the polymer substrate surface and the interfacial enrichment of the precursor solution to lower the energy barriers of heterogeneous nucleation. In addition, the coordination of the hybrid ligand with Zr 4+ creates a unique cavity structure and gives rise to novel micropores as a result of ligand defects, which can be fitted into the lattice as binding sites for water. In the water vapor adsorption test at 298 K, E-UiO-66@PAA was able to operate at 4.9 times the capacity at low pressure (0.1 < P/P 0 < 0.2) and advanced the adsorption saturation time by 30.7% of the pristine UiO-66. Especially, the relative pressure of the sudden change in water vapor uptake was reduced from 0.3 to 0.1, which could greatly save the energy required for vapor regeneration and reduce its operating cost. This study provides an effective method to improve the adsorption capacity, mass transfer rate, and workability of composites by designing a nanoporous structure and confined growth nuclei as adsorption sites.
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