CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Peng Li,Chao Ma,Ning Li,Chi Tang,Zhaolin Lv,Zhenjie Gu,Zhihua Qiao,Chongli Zhong
Metal-organic framework (MOF) membranes have demonstrated significant potential in replacing traditional polymer membranes for gas separation. However, synergistically enhancing gas permeance and selectivity remains challenging in MOF membrane design, particularly when framework pore apertures surpass gas kinetic diameters. Here, an innovative strategy is reported for engineering ultrathin ZIF-8 membranes with chemical adsorption sites via polymer bidirectional induction. The polyethyleneimine (PEI)-Zn 2+ interface layer facilitated the formation of ultrathin ZIF-8 membranes (~78.4 nm) by guiding small-sized crystal growth. Meanwhile, the competitive coordination of PEI with 2-methylimidazole induced the pendant of partially coordinated ligands in the ZIF-8 cavity to form chemisorption sites. This structural alteration enabled the in-situ chemical adsorption of CO 2 in the cavity of ZIF-8, thus contracting the window apertures and enhancing the molecular sieving efficiency. As a result, the ultrathin ZIF-8 membrane exhibited an excellent H 2 /CO 2 ideal selectivity of 34.2 with a remarkable H 2 permeance of 7143.6 GPU in single-gas tests, outperforming other reported ZIF-8 membranes. During mixed-gas H 2 /CO 2 testing, the in situ structural changes demonstrated robust pressure-performance stability and long-term gas separation capability. This work advances the development of ZIF-8 membranes for efficient separation of H 2 /CO 2 , and offers a feasible design principle and theoretical guidance for MOF-based gas separation membranes.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Xu Meng,Chengzhi Song,Zhenglong Xing,Manuel J. Lis Arias,Junfeng Yan,Qiang Ren,Yanli Xiang,Liping Liang
An efficient hydrophobic and lipophilic cotton fabric was designed for oil/water separation. ZIF-8 (zeolitic imidazolate framework-8) nanocrystals were synthesized and subsequently uniformly mixed with a GO (graphene oxide) dispersion, and then the cotton fabric was immersed in a pre-crosslinked PDMS (polydimethylsiloxane) solution and the mixture of ZIF-8 and GO to form rough and dense surface morphology and to achieve hydrophobic modification. Its surface morphologies, chemical structures , contact angles, and oil/water separation performances were characterized. The ability of prepared fabric with a separation efficiency was better than 95 % on average for various types of oil/water mixtures demonstrated the hydrophobic/oleophilic property, meanwhile, demonstrated a noteworthy degree of durability. It holds significant practical implications for the development of environmentally friendly and highly efficient materials for oil/water separation.
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Journal of Energy Storage
·
2024
·
IF 8.9
Aoji Liang,Tianyu Hou,Hui Peng,Xuan Xie,Wenjuan Li,Shuzhen Cui,Wenbin Li,Guofu Ma
Oxygen reduction reaction (ORR) electrocatalysts have the advantages of high activity, high durability and inexpensive, which are promising for promoting the mass commercialization of renewable fuel cells and metal-air batteries. Uniform N and S co-doping can enhance the integral activity and conductivity of catalysts has been shown to be important in ORR electrocatalysis. In this study, cobalt-modified N, S co-doped carbon nanofibers (Co-NSC-R) were successfully synthesized by using ZIF-8 as a template-assisted pyrolysis. The N, S co-doped carbon matrix firmly anchored the Co-N x sites on the entangled carbon fibers, which efficiently regulated the electronic structure of the Co-N x -C sites and greatly ensured their oxygen electrocatalytic activity. In addition, the half-wave potential of the Co-NSC-R catalyst reaches 0.861 V and has superior resistance to methanol intoxication and cycling stability. The assembled zinc-air batteries (ZABs) have a maximum power density of 73.1 mW cm −2 , a high specific capacity of 752.7 mAh g −1 and a long-term durability of 94 h. This work provides ideas for the application of metal-modified heteroatom-doped porous carbon nanofibers as excellent ORR catalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Huihua Wang,Jinhong Wu,Siwei Guo,Haosen Chen,Ruiqi Guo,Ding Huan,Deyong Wang,Wenchang Li,Xianglong Li,Dong Hou
Engineering interface, regulating morphology, and doping heteroatoms are regarded as effective strategies for boosting the electrocatalytic performances of transition-metal phosphides (TMPs), while still encounter some challenges to obtain desirable stability and sustaining catalytic activity. Herein, the Fe-CoP/Ni 2 P@NC/CC-350 self-supported electrode was successfully synthesized via pyrolysis of FeNi/ZIF-67/CC precursors followed by phosphating. In this structure, Fe-doped CoP and Ni 2 P composite nanoparticles are uniformly confined in the porous carbon matrix and anchored firmly on the surface of carbon cloth (CC). Moreover, the flocculent-like Fe-CoP/Ni 2 P@NC/CC-350 demonstrates superhydrophilicity to significantly facilitate mass transfer, while the unique morphology originates from a facile strategy of soaking ZIF-67/CC in the mixed solution composed of FeSO 4 and NiSO 4 . The synthesized Fe-CoP/Ni 2 P@NC/CC-350 integrates the advantages of abundant active sites, confinement effect, interface regulation and superhydrophilicity, thereby demonstrating superior HER and OER activities and stabilities in an alkaline medium (1.0 M KOH). Remarkably, Fe-CoP/Ni 2 P@NC/CC-350 electrodes used both as anode and cathode require a cell voltage of only 1.49 V at 10 mA cm −2 , much lower than that of the well-established 20 % Pt-C/CC and RuO 2 /CC couple (1.612 V). Besides, Fe-CoP/Ni 2 P@NC/CC-350 Fe-CoP/Ni 2 P@NC/CC-350 system exhibits an outstanding stability for monitoring water splitting up to 100 h at 10 mA cm −2 . DFT results further confirm that the heterointerface and Fe doping in Fe-CoP/Ni 2 P@NC/CC-350 lead to a upshift d-band center of active sites and decreased reaction Gibbs energy barrier for the rate-determining step during catalysis, thereby contributing to the superior HER and OER activities. The work provides a novel strategy to construct a superhydrophilic microstructure, and the synergistic effect of electrons originating from the heterointerface and doping paves the way for designing electrocatalysts with high activities toward water splitting.
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TALANTA
·
2024
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IF 5.6
Bin Yang,Jia Liu,Xin Liu,Shiyue Niu,Fengming Zhang,Yuting Wang,Daqian Song,Shuyun Bi
The high efficient surface-enhanced Raman scatterring (SERS) methods to detect thiacloprid and imidacloprid were established using ZIF-8-wrapped Ag nanoparticles (AgNPs) modified with β -cyclodextrin ( β -CD). The substrate of ZIF-8/ β -CD@AgNPs was characterized by ultraviolet visible spectra (UV–vis), thermogravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM). The interaction between the substrate and thiacloprid/imidacloprid was also explored. The optimum measurement conditions were obtained by response surface model based on single-factor experiments. Enhancement factors (EFs) of thiacloprid and imidacloprid were respectively 2.29 × 10 6 and 2.60 × 10 6 . A good linearity between the scattering intensity and the concentration of thiacloprid/imidacloprid within 3–1000 nmol L −1 /6–400 nmol L −1 was established. The interference experiments indicated that the methods had good selectivity . The SERS methods were successfully applied to detect thiacloprid and imidacloprid in several vegetables samples. The recoveries ranged from 95.5 % to 105 % (n = 5). The detection limits (LODs) (S/N = 3) for thiacloprid and imidacloprid were 1.50 and 0.83 nmol L −1 , respectively.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Lingrui Zhang,Li Zhao,Yating Tan,Xiaobo Gong,Meng Zhu,Yong Liu,Yucheng Liu
Oil/water separation has become a global concern due to the increasing discharge of multi-component harmful oily wastewater. Super wetting membranes have been shown to be an effective material for oil/water separation. Ultra-high flux stainless-steel meshes (SSM) with superhydrophilicity and underwater superoleophobicity were fabricated by tannic acid (TA) modified ZIF-8 nanoparticles (TZIF-8) and two-dimensional MXene materials for oil/water separation. The TZIF-8 increased the interlayer space of MXene, enhancing the flux permeation (69,093 L m −2 h −1 ) and rejection of the composite membrane (TZIF-8@MXene/SSM). The TZIF-8@MXene/SSM membrane showed an underwater oil contact angle of 154.2°. The membrane maintained underwater superoleophobic after stability and durability tests, including various pH solutions, organic solvents, reusability, etc. In addition, the oil/water separation efficiency of TZIF-8@MXene/SSM membranes was higher than 99% after treatment in harsh conditions and recycling. The outstanding anti-fouling, stability, durability, and recyclability properties of TZIF-8@MXene/SSM membrane highlight the remarkable potential of membranes for complex oil/water separation process.
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ChemistrySelect
·
2025
·Vol. 10
·期 1
·e202403550
·
IF 2
Qiulin Deng,Yuling Zhang,Xuanzhe Liao,Qianru He,Boli Zeng,Hong Luo,Lianjun Shi,Jinlong Jiang,Faqin Dong
Graphical In this study, the ZIF-8/GO composite was successfully prepared by the one-pot method and applied to the highly efficient removal of CR from high-concentration saline wastewater. The maximum removal ratio was up to 98%. Meanwhile, it was revealed that the removal of CR by ZIF-8/GO depended on hydrogen bonding, electrostatic interaction, and π-π stacking. Dye wastewater is high-concentration salt-containing chemical wastewater. It contains numerous toxic pollutants that are difficult to degrade, and its direct discharge without treatment will cause serious environmental problems. Herein, ZIF-8/GO adsorbent was prepared by the one-pot method to purify wastewater containing Congo red dye (CR). ZIF-8/GO possessed an S BET of 70.252 m 2 /g, pore volume of 0.036 cm 3 /g, and pore size of 3.22 nm. Adsorption experiments of ZIF-8/GO were performed based on various parameters, such as pH, concentration, dose, temperature, and salt concentration. The results showed that the adsorption capacity of ZIF-8/GO was better than ZIF-8 and GO for CR, which the adsorption process of 0.1-ZIF-8/GO (10.0 mg) for CR (50 mg/L) reached equilibrium in 60 min at 35 °C under the high-salt parameter (10 g/L NaCl). And the maximum removal ratio was up to 98%. Adsorption data were fitted using the Langmuir, and Freundlich isotherm models and pseudo-first-order, pseudo-second-order kinetics model and liquid film diffusion model, intra-particle diffusion model. The results indicated that the quasi-second-order kinetic model and Freundlich model were more suitable to describe the adsorption process for the removal of CR by ZIF-8/GO. ZIF-8/GO possesses a high removal ratio and it has promising applications in high-concentration salts-containing wastewater.
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ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Xiangyu Ma,Yaoying Cui,Kexing Zhu,Xiufang Zhu,Lijing Zhang,Liming Guo,Liangdong Feng,Jiadong Zhang,Yihong Wang,Ling Xia
Background Nanozymes , a new class of nanomaterials , have emerged as promising substitutes for enzymes in biosensor design due to their exceptional stability, affordability, and ready availability. While nanozymes address many limitations of natural enzymes, they still face challenges, particularly in achieving the catalytic activity levels of their natural counterparts. This indicates the need for enhancing the sensitivity of biosensors based on nanozymes. The catalytic activity of nanozyme can be significantly improved by regulating its size, morphology, and surface composition of nanomaterial. Results In this work, a kind of hollow core-shell structure was designed to enhance the catalytic activity of nanozymes. The hollow core-shell structure material consists of a nanozymes core layer, a hollow layer, and a MOF shell layer. Taking the classic peroxidase like Fe 3 O 4 as an example, the development of a novel nanozyme@MOF, specifically p-Fe 3 O 4 @PDA@ZIF-67, is detailed, showcasing its application in enhancing the sensitivity of sensors based on Fe 3 O 4 nanozymes. This innovative nanocomposite, featuring that MOF layer was designed to adsorb the signal molecules of the sensor to improve the utilization rate of reactive oxygen species generated by the nanozymes catalyzed reactions and the hollow layer was designed to prevent the active sites of nanozymes from being cover by the MOF layer. The manuscript emphasizes the nanocomposite's remarkable sensitivity in detecting hydrogen peroxide (H 2 O 2 ), coupled with high specificity and reproducibility, even in complex environments like milk samples. Significance and novelty This work firstly proposed and proved that Fe 3 O 4 nanozyme@MOF with hollow layer structure was designed to improve the catalytic activity of the Fe 3 O 4 nanozyme and the sensitivity of the sensors based on Fe 3 O 4 nanozyme. This research marks a significant advancement in nanozyme technology, demonstrating the potential of structural innovation in creating high-performance, sensitive, and stable biosensors for various applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jun Yang,Guancheng Jiang,Maen M. Husein,Wei Zhang,Shengming Huang,Fuyan Kang,Tengfei Dong,Yinbo He,Lili Yang
Assembling protective metal-organic framework (MOF) coatings for structurally fragile natural enzymes broadens their potential industrial applications. In this study, we developed an enhanced two-step biomimetic mineralization strategy, whereby cellulase acts as a biological template to pre-concentrate Zn 2+ on its surface, subsequently initiating the rapid in situ formation of zeolitic imidazolate framework-8 (ZIF-8). This approach yields a cellulase@ZIF-8 composite that effectively combines enzyme activity retention with the structural robustness of the MOF. Cellulase actively mediated ZIF-8 nucleation and framework construction through precise interfacial coordination with imidazole ligands and Zn 2+ , thus achieving in situ encapsulation. Compared with free cellulase, cellulase@ZIF-8 maintained over 90 % residual activity under acidic conditions and over 60 % activity at 80 °C. Remarkably, under alkaline conditions (pH = 9) or after 30 days of storage, cellulase@ZIF-8 residual activity exceeded twice that of the free enzyme. Even after 10 recycles, cellulase@ZIF-8 retained 60.5 % residual activity, exhibiting outstanding environmental tolerance and reusability. Our results suggest that the spatial confinement provided by ZIF-8, along with its ability to induce conformational rearrangement in the enzyme, underlies the enhanced stability and environmental tolerance observed. We further showed a pH-responsive release of cellulase facilitated by the ZIF-8 framework, enabling burst release of >90 % cellulase in a short time under acidic environment. This work offers valuable insights into enzyme-MOFs design and their applications in biocatalysis, controlled release, and adaptive biomaterials.
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CURRENT MICROBIOLOGY
·
2025
·Vol. 82
·期 9
·1-14
·
IF 2.6
Xiao Mengzhu,Wu Yujia,Li Wanzhen,Wang Jun,Zhang Weiwei,Gui Lin,Ge Fei
Antibiotics, a milestone invention in modern medicine, have significantly improved human quality of life and serve as a primary weapon against bacterial infections. However, antibiotic abuse has led to the emergence and worsening of bacterial resistance, now a major global public health challenge. Therefore, the efficient use of nanoscale antimicrobial peptides (APs) as therapeutic and diagnostic agents offers a novel strategy to replace conventional antibiotics. In this study, we innovatively combined AP with manganese dioxide (MnO 2 ) and zeolitic imidazolate framework-8 (ZIF-8) to develop a novel composite: ZIF-8-encapsulated and AP-loaded MnO 2 (AP-MnO 2 @ZIF-8). This composite exhibited superior properties, including enhanced biocompatibility, excellent aqueous stability, and increased antibacterial activity. Both in vitro and in vivo AP-MnO 2 @ZIF-8 demonstrated potent efficacy against multidrug-resistant (MDR) Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). Its minimum inhibitory concentrations (MICs) were 20 μg/ml for E. coli and 39 μg/ml for S. aureus . Furthermore, colony-forming unit (CFU) assays showed that 150-μg/ml AP-MnO 2 @ZIF-8 reduced bacterial survival below 5%, indicating effective growth inhibition. Crucially, it significantly suppressed bacterial activity in S. aureus -infected mouse wound models. Compared to free AP or MnO 2 alone, AP-MnO 2 @ZIF-8 showed significantly enhanced water solubility, bioavailability, and antibacterial activity. This work provides a foundation for developing AP-based antimicrobial strategies and offers a novel nanomaterial approach to combat the increasingly severe antibiotic resistance crisis. Graphical
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yisha Zheng,Shuoling Lei,Wenjie Guo,Wenlong Xiang,Yanmei Chen,Yanhui Zhang
The high toxicity and persistence of nitroaromatic pollutants pose a serious threat to aquatic ecosystems. In this study, inert SiO 2 was employed as an "inactive enhancer" to construct core-shell MIL-125-NH 2 @ZIF-67/SiO 2 (M@Z/SiO 2 ) heterogeneous MOF catalysts via an epitaxial-wet impregnation method, enabling the efficient reduction of p -nitrophenol ( p -NP) under ambient temperature and pressure. Although SiO 2 itself lacks catalytic activity, the micro-mesoporous network it forms effectively disperses Co active sites and prevents their aggregation. The conversion rate of p -NP increased from 92.5% to 98.4% within 6 min and retained 98% activity after three consecutive cycles. Moreover, the catalyst exhibited excellent stability across a wide pH range (3-11) and in various anionic environments. Mechanistic studies revealed that the interfacial electron transfer between ZIF-67 and MIL-125-NH 2 significantly reduces the activation energy barrier of NaBH 4 . Additionally, the incorporation of SiO 2 not only enhances the mechanical stability of the composite but also optimizes pore structure and substrate mass transfer by modulating surface hydrophilicity. This work provides valuable insights for the precise design of MOF-on-MOF heterostructures and the synergistic engineering of interfacial and surface properties in environmental catalytic materials.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Lingling Zhou,Ao Qu,Jing Guo,Zhanxiang Zhang,Hongru Li,Yanhui Zhao,Zhe Zhang,Xudong Yang
Developing solid-state red light–emitting carbon quantum dots (CQDs) with high photothermal stability remains a key challenge in this field. This study successfully constructed a new dual–function fluorescent nanocomposite material (RCDs@ZIF-8) by encapsulating 4,4-dihydroxybenzophenone and o-phenylenediamine-derived red fluorescent carbon quantum dots in ZIF-8 metal–organic frameworks. The porous structure of ZIF-8 effectively confines RCDs, significantly improving their photostability and fluorescence specificity, and successfully imparting them with intense red solid–state fluorescence. The RCDs@ZIF-8 composite material exhibits extremely high red fluorescence intensity in a solid state and can be used as an efficient, ratio–type fluorescent probe. In solution, it exhibits a highly selective fluorescence quenching response to Cr 6+ ions with a detection limit of 0.49 μM, making it suitable for the rapid, visual detection of trace amounts of Cr 6+ in environmental water samples. More importantly, the strong solid-state fluorescence of this material enables the high-contrast visualization of latent fingerprints, with clear and distinct fingerprint lines. RCDs@ZIF-8 integrates efficient solution sensing (Cr 6+ detection) and high–performance solid-state light emission/imaging (fingerprint identification, optical applications) in a dual-function manner. It has a wide range of applications in environmental monitoring, forensic identification, and optical anti–counterfeiting.
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