JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
·
IF 8.4
Baowen Fan,Xinyue Lei,Yajian Qin,Zhilin Ren,Wei Gong,Jing Li,Shuang Cai
Residues of tetracycline antibiotics pose a significant threat to the ecological environment and human safety, drawing widespread attention. In this study, a novel multifunctional nanozyme, Fe 3 O 4 QDs@ZIF-8, was synthesized by loading Fe 3 O 4 quantum dots (QDs) onto zeolitic imidazolate framework-8 (ZIF-8) using a straightforward and mild co-precipitation method at room temperature. The nanozyme exhibited favorable peroxidase-like (POD-like) activities, with K m values of 0.24 mM for TMB and 0.53 mM for H 2 O 2 , respectively. The inhibition of the POD-like activity of the nanozyme by tetracycline (TC) facilitated the development of a colorimetric and visual dual-modal detection system for TC, with detection limits of 0.015 mg/L and 0.12 mg/L, respectively. Furthermore, the nanozyme exhibited a porous structure similar to that of ZIF-8, with a specific surface area and pore diameter measured at 927.4 m 2 /g and 5.7 nm, respectively, resulting in an impressive adsorption capacity for TC of 1625.35 mg/g. Additionally, the band gap value of 4.16 eV indicates a strong photocatalytic oxidizing ability, enabling nearly complete degradation of the remaining TC after adsorption. The total removal efficiency of TC through adsorption and photocatalytic degradation reached 97.75 %. In the detection and remediation of TC in tap water and river water samples, Fe 3 O 4 QDs@ZIF-8 demonstrated superior sensitivity compared to high-performance liquid chromatography and exhibited a significantly higher removal efficiency than powdered activated carbon. A diagnostic and therapeutic integration platform for TC based on Fe 3 O 4 QDs@ZIF-8 has been successfully established. This platform integrates adsorption, detection, and photocatalytic degradation, providing a novel dual-mode detection and dual-procedure treatment for tetracycline antibiotic residues in the environment.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yipeng Pang,Maofang Zhao,Yuhan Xie,Yanping Wang,Yuxin You,Yongding Ke,Chaoyi Zhang,Xiaohan Chen,Yijia Yang,Chunlei Zhang,Xi Chen,Yi Liu,Xingtang Fang
The development of non-antibiotic strategies for combating bacterial infections, particularly through reactive oxygen species (ROS) accumulation accompanying inflammation, has attracted much attention. Despite Allicin (Ac) emerges as a promising antimicrobial agent with wide and remarkable bioactivity, it still displays quite limited ROS scavenging and anti-inflammation capacity due to uncontrolled and poor bioavailability. Herein, a multifunctional nanoplatform with pH-dependent and ROS-scavenging antibacterial, anti-inflammatory and proangiogenic properties is introduced to promote infected wound healing by integrating Ac into silver nanoparticles (AgNPs)-loaded zeolite imidazole framework (ZIF-8), namely Ac@ZIF-8/AgNPs. Primarily, the nanoplatform is activated and controlled release in the infection microenvironment, with disrupting biofilms, scavenging ROS and antibacterial capacitys, outperforming conventional Ac. Moreover, in the mouse models induced by bacterial infection, Ac@ZIF-8/AgNPs can alleviate the inflammatory condition, scavenge ROS, facilitate the regeneration of collagen fiber and enhance vascular formation, collectively accelerating wound healing. Overall, this biocompatible nanoplatform is provided as a reliable approach to solve the long-standing problem of infected wound healing.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhang Liu,C. Marquina,Wei Han,Joseph K.C. Kwan,M. Ricardo Ibarra,King Lun Yeung
This study presents the synthesis of Fe 3 O 4 @Zeolite Imidazolate Framework-8 (Fe 3 O 4 @ZIF-8), a novel magnetic core–shell adsorbent engineered for enhance adsorption of organic pollutants. The process begins with the formation of spherical magnetite aggregates (i.e., Fe 3 O 4 ) via a solvothermal method, using polyacrylic acid for stabilization and capping. A ZIF-8 shell is then grown through a sol gel process followed by reaction with 2-methylimidazole, resulting in a crystalline shell approximately 60 nm thick. Characterization techniques, including energy dispersive X-ray analysis and X-ray diffraction, confirm the successful preparation of Fe 3 O 4 @ZIF-8. The adsorption capabilities were evaluated using methylene blue (MB) and diclofenac sodium (DCF) as model pollutants. Fe 3 O 4 @ZIF-8 demonstrated rapid removal efficiencies, with 98 % removal of MB (6.01 × 10 -4 mg·g −1 ·min −1 ) and DCF (4.43 × 10 -4 g·mg −1 .min −1 ) within 15 and 30 min, respectively, significantly outperforming conventional activated carbon. Thermodynamic studies indicate that the adsorption processes are spontaneous; enthalpic changes drive MB adsorption, while DCF is influenced by entropic factors. Molecular modeling reveals preferential adsorption behaviors on different ZIF-8 facets, with stronger interactions for MB due to π-π stacking and hydrogen bonding. These findings underscore the potential of Fe 3 O 4 @ZIF-8 as an effective adsorbent for water purification, highlighting its substantial adsorption capacity (73.2 mg·g −1 for MB and 53.8 mg·g −1 for DCF), stability, and reusability.
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ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Deshuang Lu,Nikom Klomkliang,Francis Verpoort,Somboon Chaemchuen
Tailor-made unsaturated coordination of metal ions or organic linkers in zeolitic imidazole frameworks (ZIFs) has great potential in tuning the ZIFs’ properties and reactivity for their applications. Taking advantage of the solid-state thermal (SST) method as a facile and eco-friendly synthesis method, the rational coordination of metal ions with imidazole ligands in ZIF-67 through the SST method is investigated. The rational precursor ratio (metal-to-ligand source) under the solvent-free SST method emerges as a perfect strategy to tune the coordinately unsaturated sites within the ZIF-67 frameworks. Different analysis techniques, computational methods (DFT), and catalytic model reactions examine unsaturated coordination in ZIF-67 materials (defect structures). The unsaturated coordination provides unique characteristic properties on materials with excellent catalytic performance. However, the higher reactive properties are negotiated with weaker structural stability on materials. In addition, the post-SST approach is applied to enable rational coordination and modify the pristine ZIF-67 materials. The post-SST method rearranges and modifies coordination in the framework of materials. These findings are crucial to understanding the role of the uncoordinated degree to balance with structural stability based on ZIF-67, which is critical for effective heterogeneous catalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yiqian Lv,Jingmao Zhao,Baomin Fan,Muhammad Mubeen,Mahmood Mubashar,Fangze Zi,Yinxin Liu,Wanling Wang,Muhammad Jawad,Xuan Wang,Shuai Liu
To overcome the inherent limitations of epoxy (EP) coatings in terms of barrier performance, active protection, and weathering resistance, this work presents a multifunctional composite strategy based on hierarchically engineered nanohybrids. Polyaspartic acid (PASP), in coordination with Ca 2+ , was co-functionalized on zeolitic imidazolate framework-8 (ZIF-8) nanoparticles that were in-situ grown on α-ZrP platforms. The resulting PASP-Ca@ZIF-8/ZrP nanohybrids exhibited excellent dispersibility and interfacial compatibility within EP matrix, enabling the fabrication of an advanced PCZZ/EP coating with robust mechanical properties (adhesion strength of 6.7 MPa and tensile strength of 52.3 MPa) and an exceptional barrier performance (| Z | 0.01Hz of 7.1 × 10 10 Ω·cm 2 after 90 days of immersion in 3.5 % NaCl solution). The nanohybrids endowed the coating with pH-responsive release of inhibitory species (PASP, Ca 2+ , Zn 2+ , and 2-MI) imparting a dynamic self-repairing function that effectively mitigated localized corrosion, as validated by salt spray and filiform corrosion tests. During 144 h of accelerated UV exposure, the | Z | 0.01Hz value of PCZZ/EP coating retain over 1 × 10 8 Ω·cm 2 , demonstrating its excellent weathering-resistance. Molecular dynamics simulations further revealed the highest crosslinking density (96 %) and the lowest Cl − diffusion coefficient (0.0159 cm 2 /s) of PCZZ/EP model, indicating a dense internal network that restricted ion transport. This work establishes a scalable and versatile design framework for developing high-performance smart epoxy coatings, offering both mechanistic insight and practical solutions for the long-term protection of steel infrastructures in severe marine and industrial environments.
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SENSORS
·
2025
·Vol. 25
·期 22
·
IF 3.5
Canjie Hu,Pengjia Qi,Lichao Liu,Yang Chen,Jijun Tong
To meet the demand for rapid and accurate glucose determination in clinical diagnostics, food testing, and related fields, this study developed a high-performance electrochemical glucose biosensor based on multi-walled carbon nanotubes/Prussian blue/zeolitic imidazolate framework-8@glucose oxidase/chitosan (MWCNTs/PB/ZIF-8@GOx/CS). The MWCNTs/PB conductive network significantly accelerated electron transfer and catalytic activity, while the ZIF-8, with its regular pore structure and high specific surface area, provides an efficient microenvironment for the immobilization and conformational stabilization of glucose oxidase (GOx), thereby improving substrate diffusion and maintaining enzyme activity. The MWCNTs/PB/ZIF-8@GOx/CS sensor demonstrates excellent sensing performance, featuring a wide linear response to glucose concentrations ranging from 4.8 μM to 2.24 mM, a high sensitivity of 579.57 μA/mM/cm2, and a low detection limit of 0.55 μM (S/N = 3). In addition, the sensor performs excellent repeatability (RSD = 1.49%) and retained 86.23% of its initial response after 3 weeks of storage at 4 °C, highlighting its strong potential for practical application in glucose detection.
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JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Xiangyu Jia,Xiaoming Li,Shiying Li,Kai Yuan,Xiaoqing Gao,Shanhui Zhu,Mei Dong,Weibin Fan
Metals embedded nitrogen-doped carbon (M/NC) materials have garnered substantial attention due to the catalytic active centers provided by their transition metals. Here, the ZIF-67 derived Co/NC hollow structure catalyst (Co/NHC-4) exhibited remarkable performance in the hydrogenation of biomass-based 5-hydroxymethylfurfural (HMF) to valuable 2,5-dihydroxymethylfuran (DHMF). Under mild conditions of 60 °C and 2 MPa H 2 , the conversion of HMF reached nearly 100 %, with DHMF selectivity >99 %. Through the integration of advanced characterization techniques, such as TEM, XPS, XAFS, Raman spectroscopy, vapor adsorption curve, H 2 -TPD and in situ FTIR spectroscopy, it was demonstrated that the superior hydrogenation performance of hollow-structured catalysts primarily stems from unique morphology. Specifically, the hollow morphology facilitates the adsorption and diffusion of HMF on Co surface, which substantially enhances the hydrogenation efficiency. DFT calculation reveals the preferential parallel adsorption geometry of HMF and the energetically favorable hydrogenation pathway.
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INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2025
·
IF 5.2
Siqi Chen,Yizhen Yan,Jiayi Zou,Xin He,Kexin Li
Multi-modal combination therapy for tumors can overcome the limitations of single-modal therapy and bring new opportunities for high-efficient tumor treatment. Nevertheless, how to ingeniously design functionalized nanocarriers to mediate the synergistict effects among various therapeutic approaches remains a core challenge. In this study, we developed a polydopamine (PDA) coated outside and glucose oxidase (GOx) adsorbed inside copper-doped zeolitic imidazolate framework-8 (CZ8) with metformin hydrochloride (MET) / doxorubicin (DOX) as a multifunctional nano-codelivery system, abbreviated as PMDGCZ8, which could focus more on the synergy and continuity of multiple therapies including photothermal therapy (PTT), chemodynamic therapy (CDT), starving tumor therapy (STT) and chemotherapy (CT). Herein, PMDGCZ8 innovatively combined the gating effect of PDA membrane with the pH sensitivity of CZ8 skeleton to form a dual-responsive bomb that could trigger release on demand and significantly improve the accuracy of tumor localization. Furthermore, we also incorporated the strategies of reshaping the tumor hypoxia and immunosuppressive microenvironment into the synergistic treatment process in order to achieve a comprehensive anti-tumor ecological network. Both in vitro and in vivo experiments suggested that PMDGCZ8 significantly enhanced drug accumulation on tumors, reduced systemic toxicity, activated anti-tumor immune response, further inhibited the recurrence and metastasis, and consequently was expected to become a new type of nano-delivery platform with great development potential.
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Advanced Science
·
2025
·
IF 14.1
Sisi Yao,Jiawei Han,Wenjun Zhang,Dengkang Guo,Shenjie Han,Yun Lu,Jingpeng Li
Developing efficient catalytic hydrogenation microreactors with minimal catalyst loading yet high active-site density for treating concentrated organic pollutants remains challenging. Herein, a facile room-temperature method is presented to stabilize Pd single-atom catalysts (SACs) within ZIF-67 crystals during their formation, aiming to fabricate an efficient, low-loading hydrogenation catalytic microreactor (Pd@Z-P/b CMR). ZIF-67 is constructed into polydopamine (PDA)-modified bamboo microchannels under flow conditions, utilizing preimmobilized Co 2+ seeds in PDA. Despite an ultralow Pd loading (0.0014 wt.%), the Pd@Z-P/b CMR featuring atomically dispersed Pd─N 4 sites in ZIF-67 considerably outperforms its Pd nanoparticle–loaded counterpart (Pd 0.0035 wt.%) in continuous-flow hydrogenation, demonstrating superior robustness and maximized Pd utilization with 94.3% conversion efficiency for saturated 4-nitroaniline over 10 d and 97.5% conversion efficiency for gram-level methylene blue (1.0 g L −1 ) over 5 d. Crucially, it exhibits consistent, high performance in real environmental water samples. The high surface area and porosity of ZIF-67 stabilize the Pd SACs, enhance dispersion, and ensure accessibility. Simultaneously, the Pd─N 4 configuration facilitates electron transfer and optimizes hydrogen binding energy, dramatically boosting the catalytic activity. This work provides a novel strategy for room-temperature SAC synthesis and the effective treatment of high-concentration organic pollutants for sustainable wastewater remediation.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 33
·2132
·
IF 2.8
Xiao Hongbo,Feng Chaochao,Chen Yangdie,Lin Zhenqin
Traditional ZnO-based microwave absorbers and monometallic ZIF systems suffer from narrow effective absorption bandwidths due to impedance mismatch and insufficient magnetic-dielectric synergy. To address these limitations, this study proposes a self-sacrificial template strategy for constructing Zn/Co bimetallic zeolitic imidazolate frameworks (ZIFs) using spherical ZnO as a dynamic coordination host. Unlike conventional hard-template routes, the self-sacrificial templating strategy allows atomic-level control over morphology and composition via in-situ dissolution–recrystallization, leading to hierarchical architectures with rich heterointerfaces. By tuning the Co 2+ content (0.1–0.3 g) and pyrolysis temperature (700–900 °C), the resulting carbon-based composites exhibit precisely regulated microstructures and balanced electromagnetic properties. The structural evolution and composition were systematically investigated using X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM/HRTEM), X-ray Photoelectron Spectroscopy (XPS), and Vibrating Sample Magnetometry (VSM). The optimized derivative pyrolyzed at 800 ℃ (PSE3-2–800) exhibited exceptional microwave absorption performance, achieving a minimum reflection loss (RL min ) of − 51.24 dB at 4.2 mm thickness and an ultra-wide effective absorption bandwidth (EAB) of 7.36 GHz (10.64–18.00 GHz) at 2.3 mm. Structural and compositional analyses revealed that the hollow architecture formed via ZnO carbothermal reduction, coupled with graphitized carbon matrices embedded with Co 3 ZnC nanoparticles and atomic Co-Nx sites, synergistically enhanced dielectric polarization, magnetic resonance, and multi-path scattering. This work provides a paradigm for designing lightweight broadband absorbers through defect engineering and bimetallic coordination, overcoming the limitations of single-component systems in balancing impedance matching and multi-loss mechanisms.
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NANO
·
2025
·
IF 1.1
Jinglin Wang,Shikun Chen,Yuntian Wei,Shuguang Cai,Xueqing Xiao,Xingfang Huang,Chan Zheng
Due to their autonomous and controllable motions, micromotors show excellent potential for practical application to environmental remediation. We used natural pine pollens (PPs) as bio-templates (ZIF-67@PP) to develop distinctive “Mickey Mouse”-shaped ZIF-67-nanoparticle (NP)-based bubble-mediated self-propelled micromotors for dynamically degrading tetracyclines (TCs) in water. The as-prepared micromotors possessed a unique core–shell structure comprising a PP core and a ZIF-67 NP shell and were effectively self-propelled by oxygen ( O 2 ) bubbles generated by the ZIF-67-catalyzed decomposition of hydrogen peroxide ( H 2 O 2 ) . Additionally, the ZIF-67@PP micromotors’ velocity was further enhanced by optimizing the ZIF-67 NP loading and H 2 O 2 concentration. Meanwhile, the outer ZIF-67 NP shell effectively adsorbed and degraded TCs, enhancing the TC degradation efficiency of the dynamic micromotors by approximately 2.7 times compared to that of the static nonmicromotor counterpart, mainly because of the synergy of the enhanced self-motion-mediated localized mixing and outstanding adsorption and catalytic oxidation of ZIF-67 NPs. After the systematic optimization of the treatment conditions, an initial ZIF-67@PP micromotor concentration of 2 0 mg ⋅ L − 1 degraded more than 90% of the TCs within 10 min. Furthermore, the introduction of magnetic Fe 3 O 4 NPs enabled the remote magnetic control of the movement direction and magnetic recycling of the micromotors. Our work not only offers a facile strategy to incorporate a versatile family of metal–organic frameworks into the design of bubble-mediated self-propelled micromotors but also demonstrates the practical application potential of micromotors possessing distinctive morphologies for removing antibiotics from aquatic ecosystems.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xue Bai,Li-Ping Liu,Yi-Fei Xu,Yu Sun,Wan-Hong Sun,Zhe-Peng Deng,Yin-Xia Sun,Li Xu
Photocatalytic nitrogen reduction reaction (PNRR) provides a sustainable pathway for green ammonia synthesis, but still faces challenges such as high photogenerated carrier complexation rate and difficulty in N 2 activation. In this study, ZIF-67@Co-TCTB (ZC-250) MOF-on-MOF composites were prepared by liquid-phase synthesis, aiming at dual active site synergy and interfacial charge behavior modulation to enhance visible light nitrogen fixation performance. Structural and compositional analyses (FT-IR, XRD and XPS) indicate that the composite possesses both Co–N and Co–O coordination environments, and introduces N–Co and C O active sites on the surface, which effectively enhances the N 2 adsorption and activation capacity. Diffuse reflectance spectroscopy (DRS), Mott–Schottky (M–S) and steady-state photoluminescence (PL) characterization revealed that the photogenerated electrons migrated from ZIF-67 to Co-TCTB, which facilitated the interfacial charge separation, and then efficiently reduced the surface adsorbed N 2 to NH 4 + . Under the condition of no sacrificial agent, the NH 4 + yield of ZC-250 was as high as 199.73 μmol g −1 h −1 , which was an 8-fold enhancement over that of pure ZIF-67, and showed good stability after four cycles. This study provides a new material design strategy for the construction of MOF-based nitrogen fixation photocatalysts with synergistic active centers and regulated interfacial electronic behavior.
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