APPLIED SURFACE SCIENCE
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2025
·
IF 6.9
Zhengyi Zhao,Yanzhi Yang,Xin Yu,Minghong Long,Zhiyong Yan,Zhonghe Xu,Xuechun Xiao
Zeolitic imidazolate framework (ZIF) address the longstanding challenge in ammonium perchlorate (AP) catalysis by simultaneously enhancing catalytic performance and heat release, owing to their high specific surface area, abundant nitrogen-rich ligands, and unique metal dispersion architecture. In this study, various metal-incorporated ZIFs were synthesized via a classical method, among which Co-ZIF exhibited optimal catalytic activity. Performance evaluations demonstrated that Co-ZIF significantly reduced the high-temperature decomposition peak by 171.4 °C (from 471.4 °C for pure AP to 300.0 °C). The activation energy ( E a ) decreased from 301.8 kJ·mol −1 to 169.9 kJ·mol −1 . Notably, the nitrogen-rich ligands within ZIFs contributed substantial heat release during AP decomposition (increasing from 888.3 J·g −1 to 2066.8 J·g −1 ). Through TG/DTG, XRD, FT-IR, and Raman analyses of the Co-ZIF + AP composite system at 280, 290, and 300 °C, we elucidated the in-situ pyrolysis process of Co-ZIF during AP thermal decomposition. The investigation confirmed the progressive decomposition of Co-ZIF and the in-situ formation of Co 3 O 4 /N-doped carbon composites, which actively participated in catalyzing AP decomposition. Based on these findings, a stage-specific catalytic mechanism was proposed, providing new insights for the application of MOF materials in AP decomposition research.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Waqar Iqbal,Rashda,Hongzhen Cai,Jiankang Zhang,Keyan Yang,Xiangsheng Han,Shanshan Xu
The widespread pollution of water bodies with dumped antibiotics from hospital effluents, pharmaceutical wastewaters, and surface water poses a severe threat to ecosystems and human health, primarily due to the emergence of antibiotic-resistant pathogens. This study introduces an innovative electrospun cuprammonium cellulose (Cel) membrane integrating Zeolitic Imidazolate Framework-8 (ZIF-8), a metal organic framework (MOF), aimed at efficiently removing tetracycline (TC) and ciprofloxacin (CIP) in an aqueous environment. The inclusion of ZIF-8 enhances the membrane's adsorption capacity due to its high surface area and the hydrophilicity of Cel, further improving the membrane's mechanical and chemical stability. The resulting Cel/PAN@ZIF-8 composite membrane exhibited remarkable antibiotic adsorption efficiency, achieving up to 218.21 mg. g −1 for TC and 175.88 mg. g −1 for CIP, with a maximum ZIF-8 loading (4 wt%). Additionally, the membrane showed a significant antibacterial effect against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ), demonstrating its dual functionality in both pollutant removal and microbial disinfection. The adsorption kinetics followed a pseudo-second-order model, consistent with previous studies. The isotherm analysis conformed to the Langmuir model, which implies monolayer adsorption on homogeneous surfaces. The membrane exhibited high reusability, maintaining adsorption efficiencies of 88.66 % and 83.38 % after five cycles for TC and CIP, respectively, highlighting its potential for long-term use. XPS spectroscopy was employed to explore the potential adsorption mechanism for CIP and TC, with results suggesting that hydrogen bonding, π-π interactions, and electrostatic interactions play a key role in the adsorption process. The synergistic effect of ZIF-8 nanomaterials with biocompatible cellulose-based materials presents a promising approach to mitigating antibiotic contamination and combating microbial resistance. These results offer a low-cost and environmentally sustainable approach for wastewater treatment, with significant implications for public health and long-term environmental remediation.
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ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Zheng Guo,Hekai Zhang,Yunfei Song,Yaning Zong,Peng Wei,Li Yin,Minghuan Wang
Though MOFs show potential for organic dye wastewater treatment, their practical use is limited by poor recoverability of powdered MOF-based adsorbents/catalysts. To address the recovery issues and agglomeration tendencies inherent in metal-organic framework (MOF) powders, this study presents the synthesis of ZIF-67/PAN composite nanofibers via an electrospinning technique, effectively immobilizing ZIF-67 nanoparticles onto a polyacrylonitrile (PAN) matrix. The resulting composite exhibited a high specific surface area of 663.06 m 2 /g and demonstrated exceptional dual functionality for methylene blue (MB) removal. It achieved a high adsorption capacity of 1169.23 mg/g at 45 °C and enabled ultrafast catalytic degradation, achieving 100 % MB removal within 10 min through peroxymonosulfate (PMS) activation. Density functional theory (DFT) calculations revealed that demethylation and ring-opening served as the dominant degradation pathways, facilitated by the generation of sulfate (SO 4 · - ) and hydroxyl (·OH) radicals via Co 2+ /Co 3+ redox cycling. The composite material demonstrated outstanding pH resilience across a broad range (pH 3–9) and significantly reduced the ecotoxicity of degradation intermediates. Furthermore, the ZIF-67/PAN fibers exhibited excellent reusability, maintaining high performance over five consecutive cycles with an efficiency loss of less than 8 %. This work provides a robust, scalable, and environmentally friendly strategy for industrial dyeing wastewater treatment.
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Nano Today
·
2025
·
IF 10.9
Kecheng Quan,Yupu Lu,Ting Zhang,Shuren Wang,Hao Tang,Chunhao Yu,Yongsheng Zhou,Yunsong Liu,Dandan Xia,Yufeng Zheng
Antimicrobial coatings with the capabilities to prevent and treat biofilm infections on implant are promising surface treatment strategies, but it is difficult to eradicate an already-formed biofilm by the coating. Magnetically-drivable coatings can physically destruct the surface-attached biofilm to enhance antimicrobial killing. However, current magnetic coatings cannot inhibit the initial bacteria growth and the demand of coating stability restricts their magnetic controllability. Herein, a magnetically-drivable, pH-responsive coating is developed by simply mixing Fe 3 O 4 and ZIF-8 nanoparticles on titanium surface. In physiological pH, Fe 3 O 4 nanoparticles are stable and non-magnetically drivable on surface due to charge attractions and electrostatic interactions. While in acidic pH caused by bacterial growth, ZIF-8 degradation is significantly accelerated, releasing Zn 2 + and recovering the magnetic controllability of Fe 3 O 4 nanoparticles. The released Zn 2+ kills the initially-attached bacteria, inhibiting subsequent biofilm formation. Once a biofilm has formed, Fe 3 O 4 nanoparticles can be magnetically pulled-off to destruct the biofilm structure and then enhance antibiotic killing. The Fe 3 O 4 /ZIF-8 coating shows excellent biocompatibility and osteogenesis to compare with bare Ti disc. Animal experiments further proved the in-vivo antimicrobial and osteogenic performances of the coating. Therefore, this work put forward a new surface strategy to solve biofilm-related infections on implants.
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Nanoscale
·
2025
·
IF 5.1
Yi Feng,Zijing Li,Luqi Song,Shu Zhang,Bin Chen,Guanglin Wang,Kai Yang,Yan Lu,Ran Zhu
Radiation therapy is one of the core means of tumor treatment, especially in local control and radical treatment has an irreplaceable role. However, radiotherapy resistance is one of the major challenges in current clinical practice. Tumor cells have a strong ability to repair DNA damage, which can effectively resist DNA double-strand breaks caused by X-ray, thus weakening the killing effect of radiotherapy. In addition, the complexity of the tumor microenvironment (TME) will further reduce the sensitivity of radiotherapy, leading to poor treatment results. With the rapid development of nanotechnology, multi-modal combined therapy nanoplatform has gradually become a new strategy to overcome radiotherapy resistance. These nanoplatforms achieve synergies by integrating multiple therapeutic approaches, such as radiation sensitization, photothermal therapy and chemotherapy. In this study, we utilized ZIF-8, a member of the metal-organic frameworks, to simultaneously load ICG and Rapamycin for X-ray sensitization and combined photothermal therapy. In this formulation, Rapamycin enhances tumor cells' sensitivity to radiotherapy by inhibiting the mTOR signaling pathway, increasing DNA damage, regulating the cell cycle, and stimulating the STING pathway, which amplifies the tumor immune response. Meanwhile, ICG, as a photosensitizer, effectively converts light energy into heat, achieving tumor photothermal ablation. The modified drug-delivery system becomes a tumor-microenvironment-responsive smart carrier, increasing tumor cell uptake, prolonging retention at the tumor site, and achieving targeted drug delivery. It releases drugs in the specific tumor microenvironment, enhancing photothermal and radiotherapy sensitization effects. The results show that the smart dual-loaded nanoplatform effectively combines photothermal therapy and external-beam sensitization, reshapes the immunosuppressive tumor microenvironment and significantly inhibits tumor proliferation in the HepG2 subcutaneous xenograft model, demonstrating marked antitumor activity and good biosafety.
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Frontiers in Chemistry
·
2024
·
IF 3.8
Shang Xiujuan,Wang Hongdong,Yu Yongbo,Gu Jin,Zeng Jian,Hou Sinan
Antimicrobial photodynamic therapy (aPDT) has emerged as a highly promising strategy for non-antibiotic treatment of infections due to its unique advantages in efficient bactericidal action and reduction of drug resistance. The natural photosensitizing properties of curcumin (Cur) are widely acknowledged; however, its limited bioavailability has impeded its practical application. In this study, we developed a nanomaterial called Cur@ZIF-8@BA by encapsulating Cur within ZIF-8 and modifying the surface with boric acid (BA). The Cur@ZIF-8@BA exhibits pH-responsive properties and enhances bacterial binding, thereby effectively promoting photodynamic therapy. Moreover, its antibacterial activity against E. coli, Staphylococcus aureus and A. baumannii is significantly increased in the presence of light compared to a dark environment. The mechanism behind this may be that BA increases the affinity of Cur@ZIF-8@BA towards bacteria, and making released Zn2+ and BA from the nanomaterial increase bacterial cell membrane permeability. This facilitates efficient delivery of Cur into bacterial cells, resulting in generation of abundant reactive oxygen species (ROS) and subsequent bactericidal activity. In conclusion, our prepared Cur@ZIF-8@BA holds great promise as a photodynamically mediated antimicrobial strategy.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2024
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IF 4.8
Yang Zhou,Zhenzhu xia,Frank Peprah Addai,Jinping Chen,Chengxiang Feng,Zongjian Zhen,Juan Han,Feng Lin,Zhirong Wang,Yun Wang
Most pristine metal organic frameworks (MOFs) are inherently microporous. To introduce desired porosity for easy enzyme infiltration and immobilization, polystyrene spheres was used as sacrificial template to design hierarchical ordered micro-mesoporous truncated single-crystalline ZIF-8 (SOM-ZIF-8). The surface area and pore diameter of the SOM-ZIF-8 were 821 m 2 /g and 7.09 nm which changed to 669 m 2 /g and 4.98 nm respectively, after lipase immobilization, suggesting the pores and surface of the SOM-ZIF-8 served as binding sites for the enzyme, and could reach a loading capacity of 134 mg/g after 24 h. The optimal conditions for achieving maximum lipase activity for free LipaseELP, ZIF-8@LipaseELP and SOM-ZIF-8@LipaseELP were pH 7.8 at 45 °C, and maintained 33.67 %, 45.6 % and 57.78 % residual activity after incubation at 80 °C for 2 h. The specific activity towards tributyrin and p-nitrophenyl acetate were observed to be SOM-ZIF-8@LipaseELP (0.25 and 45.85 U/mg) compared to ZIF-8@LipaseELP (0.211 and 43.62 U/mg) and LipaseELP (0.179 and 41.09 U/mg) respectively. The SOM-ZIF-8@LipaseELP could further be recovered and reused for 9 rounds while maintaining 73.8 % of its original activity. This study demonstrates that introducing mesoporous structures into ZIF-8 could improve its binding enzyme property for enhanced hydrolytic function.
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ChemistrySelect
·
2025
·Vol. 10
·期 13
·e202405849
·
IF 2
Juan Dai,Qixu Chen,Yue Li,Jin Wang,Yanchao Yin,Peiyu Zhao,Peichuang Li,Luying Wang
Graphical A defect-free PVDF/ZIF-8-LS membrane prepared by loading a continuous ZIF-8-LS film layer on the PVDF membrane exhibited high and stable adsorption performance for CR and TC removal, because of a good compatibility between PVDF membrane and ZIF-8-LS layer. Lignosulfonate (LS) enhances ZIF-8 dispersion and active sites but faces challenges in recovery and secondary pollution due to its powdered form. To address this, a polyvinylidene fluoride (PVDF)/ZIF-8-LS composite membrane was fabricated via vapor deposition, where LS promoted dense ZIF-8 growth and interfacial compatibility with PVDF. The resulting PVDF/ZIF-8-LS membrane shows a higher continuous, uniform and dense ZIF-8-LS layer without macroscopic cracks or obvious defects. In addition, the PVDF/ZIF-8-LS exhibits the best adsorption capacity of 110.6 mg g −1 for Congo Red, about 8.8 mg g −1 higher than the PVDF/ZIF-8, and 110.2 mg g −1 for tetracycline, respectively. With 92% capacity retention after three cycles and stability across pH 2–10. The more active adsorption sites facilitates the contact between the ZIF-8-LS layer and the adsorbed substance, in addition to the electrostatic, H-bonding, π-π interactions, and coordination bond are also conductive to the adsorption of PVDF/ZIF-8-LS. The excellent adsorption performance and good recyclability of the PVDF/ZIF-8-LS composite membranes exhibit a potential for adsorbing other contaminants from water.
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PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
·
2015
·Vol. 14
·期 9
·1644-1650
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IF 2.267
Liu Chang,Yan Bing
We synthesize a zinc zeolite-type metal—organic framework, the zeolitic imidazolate framework (ZIF-90), which exhibits an intense blue luminescence excited under visible light. Luminescent studies indicate that ZIF-90 could be an efficient multifunctional fluorescence material for high sensitivity metal ions, anions and organic small molecules, especially for Cd 2+ , Cu 2+ , CrO 4 2− and acetone. The luminescence intensity of ZIF-90 increases with the concentration of Cd 2+ and decreases proportionally with the concentration of Cu 2+ , while the same quenched experimental phenomena appear in the sensing of CrO 4 2− . With the increase of the amount of acetone, the luminescence intensity decreases gradually in the emulsions of ZIF-90. The mechanism of the sensing properties is studied in detail as well. This study shows that ZIF-90 could be a useful luminescent sensor for metal ions, anions and organic small molecules.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Linghui Yin,Min Hu,Dongyan Li,Jiahao Chen,Kai Yuan,Yishui Liu,Zhaoxiang Zhong,Weihong Xing
A multifunctional air filtration membrane is urgently required for high efficiency removal of particulate matter (PM) and capture of airborne toxic gases (SO2, NOx, VOCs, etc.). Zeolite imidazole frameworks (ZIFs), as a subclass of metal–organic frameworks (MOFs), hold promise for poisonous pollutant capture due to their excellent adsorption performance and high thermal and chemical stability. Here, a facile strategy is demonstrated to synthesize a multifunctional air filtration membrane through in situ growth of ZIF-67 nanoparticles on a flexible silica nanofiber membrane (ZIF-67@SiO2 NFM), which significantly improved the contact area of the membrane with SO2 and PM. When it underwent a standard PM removal test, the prepared ZIF-67@SiO2 NFM showed the highest PM2.5 removal efficiency of 100% at a relatively low pressure drop of 335 Pa with the impregnation time being 24 h. At the same time, due to the load of ZIF-67, the SO2 adsorption capacity up to 1013 mg/g could be realized in the obtained membrane when exposed to a SO2/N2 mixed flow with a humidity of 55%. Furthermore, during the incense smoke experiment, the PM2.5 filtering efficiency of the prepared ZIF-67@SiO2 membrane could reach 98.9% under an initial concentration of 1000 μg·m–3. This work proposes a simple and practical strategy to not only prepare a high-performance multifunctional nanofiber membrane but also achieve the capture of SO2 and PM with high efficiency.
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Journal of CO2 Utilization
·
2018
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IF 5.503
Zhengfeng Huang,Peimei Dong,Yanzhao Zhang,Xiaoxiao Nie,Xiya Wang,Xiwen Zhang
A strategy of coupling a photocatalyst with a high CO 2 adsorption capacity material was proposed in order to integrate CO 2 capture and photoreduction processes into a single system. TiO 2 and ZIF-8 were selected for their high photoactivity and CO 2 adsorption capacity respectively. We employed a facile in-situ growth strategy to inlay ZIF-8 into the TiO 2 film grid. X-ray diffraction and scanning electron microscopy revealed that ZIF-8 was successfully prepared and inlaid into the TiO 2 film. X-ray photoelectron spectroscopy and photoluminescence spectra suggested that the TiO 2 and ZIF-8 were coupled by chemical bonding. The ZIF-8 decorated TiO 2 film exhibited excellent CO 2 capture capacity and showed remarkably enhanced yield for reducing CO 2 to CO and CH 4 when compared with pure TiO 2 film. The probable mechanism of the photoreduction process is also discussed.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Lin Sun,Yu Liu,Ming Yan,Qingjun Yang,Xiaoying Liu,Weidong Shi
The ideas of high effective specific surface area, multi-component and multi-phase synergistic are introduced to construct high-performance and high-stability electrodes. After etching and exchanging with Lewis acid (nickel ion) and annealing selenization, the hierarchical multi-phase Ni x Co 1-x Se 2 /carbon–nitrogen frameworks (CNFs, Zeolitic-Imidazolate-Framework-L derivatives) on CoO is synthesized. After systematic research, it is found that the concentration and reaction time of the Lewis acid and selenization conditions can directly affect the structure and composition (bimetal) of the electrode. In the optimal electrode, CNFs with the larger effective specific surface area can fully expose the active material to the electrolyte, the bimetal synergy (Ni-Co), and the multiphase synergy ((Ni, Co)Se 2 and CoSe 2 ) can effectively enhance the performance. The anode demonstrates a high mass-specific capacity of 207.8 mAh g −1 . A hybrid supercapacitor (Ni x Co 1-x Se 2 /CNFs/CoO@CC//activated carbon) is fabricated and displayed superior performance and stability: high energy density (45.0 Wh kg −1 , 800.0 W kg −1 ), and a cycle retention rate of 98.0% (12,000 cycles). LEDs in parallel were lit up by the devices, showing their practical value and potential.
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