ChemistrySelect
·
2025
·Vol. 10
·期 35
·e03319
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IF 2
Simombela Mikunga,Chanez Maouche,Peter Phiri,Shuang Wang,Chao Cheng,Juan Yang
The development of cost-effective, high-performance oxygen reduction reaction (ORR) electrocatalysts is pivotal for advancing energy conversion technologies such as metal–air batteries and fuel cells. Herein, we report a facile and efficient strategy to synthesize Mn nanoparticles loaded on N-doped hierarchically porous carbon framework (Mn/N-C) through utilizing ZIF-8 as a carbon/nitrogen precursor and MnCl 2 ·4H 2 O as the Mn source. The synthesis integrates mechanical grinding with an NaCl-assisted pyrolysis process, where molten NaCl acts as a dynamic template and intercalation agent to prevent structural collapse during carbonization, thereby creating a 3D porous architecture with coexisting micro-, meso-, and macropores. Physicochemical characterization reveals that the Mn/N-C-2 sample exhibits a high specific surface area (1770 m 2 /g), abundant defects, and uniform dispersion of Mn nanoparticles within the N-doped carbon matrix. Electrochemical evaluations demonstrate that Mn/N-C-2 catalyst possesses a higher half-wave potential ( E 1/2 ) of 0.836 V and a larger limiting current density ( J L ) of 5.54 mA/cm 2 , surpassing other control samples and most reported Mn-based catalysts and comparable to that of commercial Pt/C. When integrated into Zn–air batteries (ZABs), Mn/N-C-2-based ZABs deliver an open-circuit voltage of 1.49 V and a peak power density of 150.51 mW/cm 2 , outperforming benchmark Pt/C-based counterparts. This work offers a cost-effective electrocatalyst for ORR and can be used instead of noble metals in ZABs. Graphical Mn/N-C electrocatalysts are fabricated by a NaCl-assisted pyrolysis strategy. The optimized Mn/N-C-2 catalyst exhibits a large specific surface area, hierarchically porous architecture and high content of active N, presenting an E 1/2 of 0.836 V for ORR. When integrated into ZABs, it delivers an open-circuit voltage of 1.49 V and a peak power density of 150.5 mW/cm 2 .
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Li Ding,Yiwen Xie,Xinrui Bai,Liang Qiu,Zharykbasov E,Z. Kakimova,Gang Wu,Jianlong Wang,Yuxia Song,Rong Wang
Here, we report a general ultrasound-assisted photodynamic strategy that overcomes this challenge by employing hypocrellin B (HB), originally a narrow-spectrum agent initially effective against Gram-positive bacteria, to eradicate Gram-negative bacteria. By applying exogenous ultrasound (US), we induce interfacial electron movement and leverage the cavitation effect to disrupt the lipid bilayer structure of the outer membrane (OM). Consequently, 200 μg mL −1 of HB@ZIF-8 (ZHB) achieves an almost 7-log reduction in Escherichia coli counts within 20 min, which is sixfold higher compared to the antibacterial activity exhibited by HB alone. Molecular dynamics simulations combined with 1.3-fold increase in fluorescence signals in OM permeability experiments confirm that the synergy of ultrasound and photodynamic treatment promotes OM permeability, facilitating rapid diffusion of ROS and HB into inner membrane and intracellular regions. Furthermore, the ZHB exhibited superior inhibition of bacterial proliferation, remarkably extending Shine Muscat grapes shelf life by up to 15 days. Therefore, the sonodynamic interfacial-assisted photosensitizer ZHB prepared in this work was found effective in enhancing the antimicrobial effect against foodborne pathogens.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 10
·1-14
·
IF 5.3
Bi Leyao,Fu Boyan,Lin Jiahui,Wen Junsheng,Fu Jiaxing,Tian Wenyue,Su Ningning,Zou Binglin,Wang Chunjie,Wang Yue
Soda biscuit-like Ag-ZnO@ZIF-8 heterostructures were successfully synthesized using a secondary hydrothermal method for the first time, demonstrating exceptional ethylene glycol sensing performance. The sample (2-Methylimidazol (MeIm) concentration of 0.04 g) exhibits a remarkable response value of 1325.50 to 100 ppm ethylene glycol at 240 °C, along with a rapid response time of merely 7 s. Additionally, it displays outstanding gas selectivity (k = 28.63–696.90), great reproducibility and long-term stability. Further experiments indicate that the enhancement of the composite material’s gas sensing performance can be primarily attributed to the interfacial electron transfer effect, the abundance of oxygen vacancies, and the synergistic interactions within the heterostructures. Overall, this study lays a solid theoretical foundation for the practical detection applications of ethylene glycol and provides new insights into the research on gas sensors based on ZnO-organic frameworks. Graphical
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SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Xiaoqing Cui,Bo Yang,Shen Zhao,Xuewei Li,Meng Qiao,Ran Mao,Yan Wang,Xu Zhao
In this paper, a sensitive and selective electrochemical sensor was constructed for nickel (II) detection by employing the electrode material of zeolitic imidazolate framework-8@dimethylglyoxime/β-cyclodextrin/reduced graphene oxide (ZIF-8@DMG/β-CD/RGO). The material was characterized and analyzed by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Nitrogen adsorption-desorption isotherms in detail. In these composite, ZIF-8 served as the supporting material of DMG which was the selective complexing agent to Ni (II), RGO employed conductivity while β-CD prevented the aggregation of RGO sheets. With these features, the sensor showed a wide linear range of 0.01–1.0 μM and a low detection limit of 0.005 μM (S/N = 3). Interferences of diethanol, citric acid , humic acid, Triton X-100 and some common metal ions can be ignored to some extent. Finally, the sensor was applied to Ni (II) detection in real water sample.
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Nano Select
·
2021
·Vol. 2
·期 6
·1225-1232
·
IF 0
Ziqi Zhang,Yan Zhang,Yingqi Liu,Siqi Zhang,Kaida Yao,Yueqiu Sun,Yang Liu,Xiangzhi Wang,Weimin Huang,Jun Lu
Cerium has been used as an implanted alloy additive for many years for it can enhance the mechanical properties of the alloy and restrain the corrosion of the implant. Moreover, cerium oxide nanoparticles are often used as an antibacterial material. However, there were few researches focusing on the antibacterial properties of Ce 3+ and Ce 4+ ions, instead of their corresponding oxide, as potential antibacterial coatings. Thus in this work, we loaded Ce ions into the porous structure of the ZIF-8 nanoparticles and co-deposited them with hydroxyapatite as a composite coating onto anodized titanium dioxide nanotubes array in order to test whether it can improve the anti-corrosion and antibacterial properties of the materials without affecting the biocompatibility.
研究领域:
生物材料学
·
纳米医学
·
表面工程
·
骨科植入物
·
抗菌材料
·
生物医学工程
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Ning Liu,Jie Wang,Huiyu Yang,Fan Cheng,Shuguang Bi,Guoliang Liu,Ying Ou,Hai Liu,Chunli Gong
In order to improve the proton conductivity, CH 3 OH barrier performance and long-term durability of proton exchange membranes in direct methanol fuel cells (DMFCs), herein, a novel functional nanofiber substrate (IL-ZIF-8@PVDF) was prepared by in situ growing metal-organic framework (ZIF-8) on poly(vinylidene fluoride) (PVDF) nanofibers, followed by modification with ionic liquid (IL) containing sulfonic acid groups. PVDF nanofibers can provide flexible mechanical support for ZIF-8, thereby effectively solving the processing difficulties of ZIF-8 caused by its brittleness. Further IL modification of ZIF-8 can not only increase the compatibility between ZIF-8@PVDF and the filling polymer, but also utilize the continuous PVDF nanofiber network to establish long-distance continuous H + transport pathways within the membrane. The as-prepared sulfonated poly (ether ether ketone) impregnated IL-ZIF-8@PVDF composite membrane showed a very high proton conductivity of 161.92 mS cm −1 (80 °C). Meanwhile, the presence of nanofiber backbone and ZIF-8 inside the membrane effectively limited the swelling and methanol permeation. The peak power density (PPD) of the DMFC output equipped with the membrane is up to 114.86 mW cm −2 (2 M methanol, 80 °C), 1.28 times that of the commercial Nafion 211. The durability test suggested that the composite membrane assembled DMFC possessed excellent open circuit voltage stability (only 6.3 % attenuation after 320 h of continuous testing). This work provides a new design idea for PEMs for DMFCs.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Jian Xiao,Jiang Liu,Yuxin Guo,Jiali Lin,Qian Li,Dong Zeng,Ruizhi Wen,Hongchang Li
Given the vital nutritional and metabolic role of ascorbic acid (AA) and the need for rapid detection, a photoresponsive nanozyme-based composite was developed for sensitive, accurate, and convenient AA analysis. In this report, a ternary ZIF-8/g-C 3 N 4 /SiO 2 photoresponsive oxidase-mimicking system was developed and applied to AA detection. By regulating the loading ratio of ZIF-8 on the g-C 3 N 4 /SiO 2 substrate, the composite with excellent photoresponsive oxidase-like activity was successfully prepared. Owing to its enhanced visible-light absorption and efficient charge separation and transfer, the system exhibited significantly improved photoresponsive performance. Experimental results demonstrated that ZIF-8/g-C 3 N 4 /SiO 2 could catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), generating oxidized TMB (oxTMB) through the formation of reactive species, thereby producing a distinct color change. In an acidic environment, AA inhibited the oxidase-like activity of the catalyst due to its strong reducing capability, thus suppressing the colorimetric reaction. Based on this principle, the as-synthesized ZIF-8/g-C 3 N 4 /SiO 2 photoresponsive oxidase mimic was applied to the detection of AA in three beverages. The method revealed a good linear response within the concentration range of 1–40 μM, and the detection limit (LOD) was 0.14 μM. The recoveries of the spiked samples ranged from 95.00% to 103.85%, suggesting that the present method could be successfully applied to sense AA in practical samples. Furthermore, we integrated ZIF-8/g-C 3 N 4 /SiO 2 with the RGB strategy into a novel sensing platform for the visual/onsite semi-quantitative detection of AA in real samples, demonstrating the great potential prospects for the development of rapid food assay.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Zeyuan He,Xiaoqing Zhao,Hongqi Shi,Tao Yang,Liu Yang,Bin Wang,Lei Huang,Run Huang
A novel ZIF-8@Nar@CS nanocomposite was synthesized by a ternary co-assembly strategy. • ZIF-8@Nar@CS has pH-responsive drug release feature following first-order kinetics. • ZIF-8@Nar@CS revealed strong bactericidal effect against E. coli and S. aureus . • ZIF-8@Nar@CS enhanced cytocompatibility and osteogenic activity as compared to ZIF-8. • The designed drug-delivery platform shows potential to be used in orthopedics field. Development of functional nanocomposites for bone tissue repair is often hampered by their bioinertness and insufficient antibacterial performance. To overcome the limitation, this study developed a novel ZIF-8@Nar@CS composite nanoparticle system via a ternary co-assembly strategy. The microstructure of the ZIF-8@Nar@CS was explored by SEM, XRD, FTIR, UV–Vis, BET, and the interaction mechanism of the composite was elucidated via XPS and zeta potential analysis. In addition, the drug release behavior, antibacterial activity and osteogenic property of the composite were also evaluated in vitro. The results show that the ZIF-8@Nar@CS achieved a naringin (Nar) drug loading efficiency of 19.22% through the electrostatic interactions and exhibited a distinct pH-dependent drug release profile. Its cumulative release reached 98.89% at pH 5.5, in stark contrast to only 13.6% at pH 7.4, following first-order kinetics. Profiting from the concomitant release of Zn 2+ , Nar, and chitosan (CS), the ZIF-8@Nar@CS exerted a strong antibacterial activity of 99.99% against both S. aureus and E. coli . Critically, the ZIF-8@Nar@CS also exhibited favorable cytocompatibility and effectively enhanced the osteo-differentiation of MC3T3-E1 cells as compared to the ZIF-8 nanocarrier. This work might provide a new horizon for developing a safe nanoparticle delivery platform for bone repair and regeneration in clinic.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Qi Liu,Ming-Dan Yao,Zi-Long Yang,Fu-Gui Yang,Zhe Feng,Ji Cai-Rang,Yu-Long Xie
ZIF-8-derived ZnO/CoFe 2 O 4 removes 99.12% ciprofloxacin in 6 min under visible light. • Type II band alignment drives directional electron transfer, suppressing carrier recombination. • Dual-channel PMS activation via photoelectron reduction and Co/Fe redox cycling. • Over 99% efficiency retained after five cycles in actual surface water and groundwater. Fluoroquinolone antibiotics in aquatic environments threaten ecosystems and human health by spreading antimicrobial resistance. This study synthesized a magnetically recoverable ZnO/CoFe 2 O 4 heterojunction using ZIF-8-derived porous ZnO as substrate via solvothermal method. The optimized composite achieved 99.12% ciprofloxacin removal within 6 min under visible light with peroxymonosulfate. XPS evidence supports Type II heterojunction formation with directional electron transfer with directional electron transfer from ZnO to CoFe 2 O 4 . A dual-channel PMS activation mechanism is proposed involving direct PMS reduction by photogenerated electrons and SO 4 ⁻ generation through Co 2 ⁺/Co 3 ⁺ and Fe 2 ⁺/Fe 3 ⁺ redox cycles. EPR identified 1 O 2 and SO 4 ⁻ as dominant reactive species. The catalyst maintained excellent stability with over 99% efficiency after five cycles. LC-MS revealed piperazine ring cleavage, decarboxylation and defluorination pathways leading to deep oxidative degradation. This work provides an efficient strategy for antibiotic wastewater treatment using magnetically separable photocatalysts with synergistic photo-oxidation and persulfate activation capabilities. Download: Download high-res image (205KB) Download: Download full-size image
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CRYSTAL GROWTH & DESIGN
·
2026
·
IF 3.6
Xiang-hua Qi,Zheng-hong Wang,Sheng-quan Chang,Kun-lun Gu,Peng Wang,Chun-hui Gong,Ao-tian Gu,Shu-xuan Li,Yi Yang
The crystallization behavior of 2,4,6-trinitrotoluene (TNT) confined within a hierarchical macro-microporous ZIF-8 (SOM-ZIF-8) framework and its impact on thermal decomposition are systematically investigated. TNT is incorporated into the porous host via evaporative crystallization, resulting in composites with varying TNT loadings. The well-defined macropores serve as templates for the confined growth of TNT nanospheres, while the intrinsic micropores are expected to facilitate the adsorption of key decomposition intermediates, potentially promoting autocatalytic decomposition pathways. XPS analysis reveals a negative shift of Zn 2p peaks and a positive shift of the –NO2 N 1s peak, indicating electron transfer from the nitro groups to the Zn2+ centers─an interfacial interaction further supported by the blue shift of –NO2 vibrations in FTIR. This confined crystallization dramatically alters the thermal decomposition behavior: the peak decomposition temperature decreases from 320 °C for pristine TNT to as low as 180 °C for the composite, and the apparent activation energy is reduced from 131.6 kJ·mol–1 to 75.1 kJ·mol–1. Combustion tests reveal significantly enhanced flame intensity and a maximum temperature increase from 889.5 to 1216.0 °C. The optimal loading (TNT: SOM-ZIF-8 = 5:1 by mass) achieves a balance between microporous catalysis and macroporous nanoconfinement, leading to the most efficient energy release. This work demonstrates that confined crystallization within hierarchically porous MOFs is an effective crystal-engineering strategy to tailor the thermal decomposition kinetics of conventional explosives, offering new insights into structure–property relationships in energetic materials.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2026
·
IF 3.6
Shengke Li,Yiyun Gao,Miao Cheng,Hao Zhou,Kehan Zhang,Ruibing Wang,Aihua Zou
Controllable and on-demand delivery of nanopesticides have great potential to enhance pesticide utilization and facilitate sustainable agriculture. Photo-responsive supramolecular host–guest systems capped on mesoporous nanomaterials are deemed as competitive nanovalves for efficient and straightforward control of pesticide release. Herein, azobenzene-modified mesoporous silica nanoparticles (Azo-MSNs) were fabricated for loading the pesticide imidacloprid (IMI) and subsequent construction of photo-responsive nanopesticides by taking advantage of the ternary host–guest complexes of cucurbit[8]uril(CB[8])/ trans -Azo/paraquat (PQ) as nanovalves. UV-irradiation will open the nanovalves due to attenuated binding affinity of CB[8]/PQ/ trans -Azo complexes, thus triggering the release of trapped IMI inside Azo-MSNs. In detail, MSNs-as (∼160 nm) were synthesized with a template agent and directly used to produce surface-modified Azo-MSNs-as. After template removal, the obtained Azo-MSNs were loaded with IMI to produce IMI@Azo-MSNs (35.60% pesticide loading), which were treated with CB[8]/PQ complexes to construct photo-responsive supramolecular nanopesticides IMI@CB[8]/PQ/Azo-MSNs. The supramolecular nanopesticides can achieve controllable and on-demand release of IMI upon 6 h of UV irradiation (total 51.20% vs. 87.95% during 11 h). This work offers an efficient and straightforward approach to constructing photo-responsive nanopesticides and holds significant importance for the sustainable development of modern agriculture. Graphical Cucurbit[8]uril-based ternary complexes with paraquat and azobenzene are employed as photo-responsive nanovalves for the facile and efficient construction of smart nanopesticides, enabling controllable and on-demand pesticide release. This strategy holds great promise for promoting the sustainable development of modern agriculture.
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TALANTA
·
2026
·
IF 6.7
Huijun Li,Tianyi Zheng,Xiang Liu,Luojia Cheng,Junjun Sun,Zhouqing Xu,Yan Wang
A multifunctional composite, designated as ZIF-8@LY/ZIF-8@CDs-Eu 3+ , was rationally designed as a fluorescence probe and high-performance photocatalyst for simultaneous detection and degradation of oxytetracycline (OTC). To address the critical challenge of co-encapsulating fluorescein (LY) and Eu 3+ -functionalized carbon dots (CDs-Eu 3+ ) within a single porous particle without functional incompatibility, we proposed a core-shell ZIF-8 architecture, where the etched ZIF-8 core served as the host for LY loading, and the in situ grown ZIF-8 shell was introduced to immobilize CDs-Eu 3+ . The acetic acid etching of the ZIF-8 core created abundant sites to absorb more LY molecules, which further enhanced the OTC removal efficiency. On this basis, a fluorescence “turn-on” ratiometric quantitative detection platform for OTC was established, with a low limit of detection (LOD) of 1.8 nM. Meanwhile, the ZIF-8@LY/ZIF-8@CDs-Eu 3+ composite achieved 99% OTC removal within 300 min under light irradiation, driven by the generated reactive species including superoxide radicals (·O 2 − ), hydroxyl radicals (·OH), and photogenerated holes (h + ). Notably, three parallel degradation pathways of OTC were identified via high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS). This work not only provides an innovative strategy for the design of multifunctional MOF-based composites, but also opens a new avenue for the efficient monitoring and elimination of antibiotic residues in complex environmental matrices.
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危险品化学品经营许可证（带存储）