Journal of Inorganic and Organometallic Polymers and Materials
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2025
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IF 4.9
Liu Li,Lai Dengwang,Cao Wuyan,Bao Zanjuan,Zhao Tian,Wang Chunhua,Liu Yuejun,Yang Jun
This study synthesized zeolitic imidazolate framework (ZIF-8) using a solvothermal method and employed mechanical stirring to coat basic magnesium hypochlorite (BMH) onto the surface of ZIF-8, thus preparing antibacterial microspheres of BMH/ZIF-8. Escherichia coli ( E. coli ) was used as the model bacterium, the effect of BMH concentration on the antibacterial effect of BMH/ZIF-8 was explored, and the optimal BMH concentration was determined to be 100 µg/mL. The antibacterial rate was 73% for BMH, 20% for ZIF-8, and 100% for BMH/ZIF-8, as determined by the plate counting method. In addition, the synergistic effect factor (SEF) determination method calculated SEF > 0. This shows that BMH and ZIF-8 had a synergistic antibacterial effect. Important techniques such as Scanning Electron Microscope (SEM), Brunauer-Emmett-Teller (BET), and X-ray Diffraction (XRD) analysis were employed to investigate the synergistic antibacterial mechanism of BMH and ZIF-8. The mechanism is that porous ZIF-8 with ultra-large specific surface area cooperates with BMH to antibacterial. This synergistic effect allows BMH sheets to be adsorbed on the surface of ZIF-8, greatly increasing the contact area between the antibacterial agent BMH and bacteria. Additionally, BMH adsorbed on the surface of ZIF-8 can also serve as surface protection, thus delaying the breakage of Zn-N coordination bonds within ZIF-8. Consequently, as BMH on the surface of ZIF-8 is gradually consumed, the Zn-N coordination bonds undergo breakage, leading to slow release of internal Zn 2+ and 2-methylimidazole organic ligands. Zn 2+ possesses oxidizing properties, enabling it to bind with bacteria and disrupt their protein structures. Meanwhile, 2-Methylimidazole can undergo degradation, resulting in the generation of reactive oxygen species (ROS). The hydrophobic methyl group of 2-Methylimidazole is also able to compromise the integrity of bacterial membranes and impede the activity of key enzymes by means of chelating metal ions. Collectively, these mechanisms, in conjunction with ROS, establish a multifaceted antimicrobial network, thereby engendering a favorable antimicrobial effect.
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JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Yang Xiang,Zan Liu,Zhi-lin Cheng
The metal organic framework (MOFs)-derived porous carbon materials with highly dispersed metal active sites were of the exclusive application foreground in many field, such as catalyst, electrochemistry, adsorption desulfurization and so on. However, the loss issue of metal active sites in MOFs frame was indispensable during the high temperature carbonization because of the lower boiling point of many metals, thus fundamentally affecting the atom-scale uniform distribution merit of MOFs-derived porous carbon materials. This work was to provide a novel strategy to address the loss issue of the active metal volatilization in the fabrication of MOFs-derived porous carbon materials. The ZnO nanosheets were pre-grown on the surface of diatomite by using in-situ microwave-assisted preparation, and thereafter the Zn-containing ZIF-8 particles covered the surface of ZnO nanosheets by virtue of the ZnO-induced growth. The results affirmed that the high content Zn-doped porous carbon materials were achieved and the Zn volatilization in MOFs was restrained on account of the occurrence of ZnO on diatomite (DE) surface during the carbonization. The adsorption desulfurization performance of the ZnO/Zn-embedded porous carbon materials/DE (ZnO/Zn/C@DE) was examined by the sulfur-containing compounds in simulated oil. The adsorption desulfurization performance investigation indicated that the ZnO/Zn/C@DE had the optimum adsorption capacities of 45.3 mg/g for benzothiophene and 37.4 mg/g for thiophene. Nonetheless, the competitive adsorption desulfurization finding of toluene in simulated oil showed that the adsorption capacities of ZnO/Zn/C@DE for TH and BT were dramatically descended, suggesting the presence of S-M interaction, wherein S stood for the S atom in a thiophene molecule and their analogs, and M for Zn atoms in porous carbon materials.
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INORGANICA CHIMICA ACTA
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2024
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IF 2.7
Xinfeng zhu,Tuo Wang,Jiawei Sun,Jiaxuan Li,Jingyu Wang,Junning Wang,Rongfu Peng,Zhengjie Li,Jingquan Liu,Libin Jiang,Kai Wang,Dandan Pang,Xueping Liu,Chaohai Wang,Jinhui Zhang
A series of ZIF-67-derived materials have been prepared by stirring and roasting ZIF-67 at different temperatures and used to activate persulfate for oxidation of tetracycline. Compared with Co 3 O 4 and common MOFs (MiL-100-Fe, UiO-66, and ZIF-67), ZIF-67-derived materials exhibit excellent catalytic activity. A 95.06 % removal has been achieved for 20 mg/L tetracycline at a catalyst dosage of 0.6 g/L, PMS dosage of 0.2 g/L. The N 2 adsorption/desorption experiment and the SEM analysis show that the large specific surface area favors the full contact between the active sites and the pollutants, and the regular pore structure is conducive to the diffusion and mass transfer of the pollutants. Moreover, XRD, Raman, and XPS studies demonstrate that a suitable calcination temperature can promote the formation of oxygen vacancies and active Co 2+ , essential for the formation of active oxygen species. The free radical scavenging experiment reveals that ·O 2 – is the main active species, followed by 1 O 2 . The effects of catalyst dosage, PMS dosage, initial pH, and coexisting ions on tetracycline oxidation are also investigated. Thus, this study provides the theoretical basis and practical evidence for activating PMS as a high-performance catalytic material for the degradation of antibiotics in water.
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JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Hongjin Li,Yongchao Sun,Jianyu Guan,Lu Bai,Tianyou Li,Fake Sun,Yijun Liu,Gaohong He,Canghai Ma
Mixed matrix membranes (MMMs), composed of polymers and fillers, capitalize on the complementary strengths of both materials, offering a promising approach for developing high-performance membranes for C 3 H 6 /C 3 H 8 separation. However, the effectiveness of MMMs is often hindered by poor interfacial compatibility between the polymer and the filler. To address this challenge, we present an effective strategy that simultaneously enhances both interfacial compatibility and gas separation performance in MMMs. By etching ZIF-8 with cyanuric acid (CA), we successfully synthesized defect-engineered ZIF-8 (DZIF-8), a hollow nanoframe structure that features open metal sites. These sites not only coordinate with the amidoxime groups of amidoxime-functionalized PIM-1 (AO-PIM-1) to improve interfacial compatibility but also significantly enhance the adsorption capacity for propylene. The resulting MMMs exhibited excellent interfacial compatibility with no observable filler agglomeration. Remarkably, the 10 % DZIF-8-based MMM enhances C 3 H 6 permeability to 492 and boosts C 3 H 6 /C 3 H 8 selectivity to 24. The defect-engineered MOF-based MMM (DMMM) surpassed the 2003 upper bound for C 3 H 6 /C 3 H 8 separation and demonstrated outstanding resistance to plasticization. Furthermore, the DMMM exceeded the 2008 Robeson upper bound for H 2 /CH 4 (N 2 ) separation performance, highlighting its exceptional versatility. These results showcase the potential of defect-engineered MMMs in gas separation applications, particularly in high-performance C 3 H 6 /C 3 H 8 separation.
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Small
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2025
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IF 12.1
Xinhui Zhang,Aiping Wu,Dongxu Wang,Ying Xie,Aleksandr I. Gubanov,Gennadiy A. Kostin,Chungui Tian
The bi-transition-metal interstitial compounds (BTMICs) are promising for water electrolysis. The previous BTMICs are usually composed of irregular particles. Here, this work shows the synthesis of novel 1D Co 6 Mo 6 C-based heterojunction nanowires (1D Co/Co 6 Mo 6 C) with diameters about 50 nm and a length-to-diameter ratio about 20 for efficient water electrolysis. An interesting growth process based on pyrolytically “squeezing” PMo 12 (Phosphomolybdic acid)/ZIF-67 (Zeolitic Imidazolate Framework-67) cube precursor is demonstrated. The “squeezing” growth is related to the role of Mo species for isolating Co species. A series of tests and theoretical calculation show the mutual regulation of Co and Mo to optimize the electronic structure, accelerating H 2 O dissociation and the reduction kinetics of H + . Additionally, the nanowires provide pathways for electron transfer and the transmission of reactants. Consequently, the 1D Co/Co 6 Mo 6 C exhibits high activity for hydrogen evolution reaction ( η 10 of 31 mV) and oxygen evolution reaction ( η 10 of 210 mV) in 1 m KOH. The electrolytic cell based on 1D Co/Co 6 Mo 6 C requires a low voltage of 1.43 V to drive 10 mA cm −2 . The catalyst also exhibits good HER performance in 1 m phosphate-buffered saline solution, exceeding Pt/C at a current density >42 mA cm −2 .
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Lipeng Wu,Xiaomin Wang,Pengwei Zhao,Yongsheng Ji,Bin Li,Yongsheng Xu,Tao Liao,Qing Xia,Yang Li,Xiaobin Fan,Wenchao Peng
Atomic Zn-N-C materials are synthesized by direct carbonization of ZIF-8, which maintains the rhombic dodecahedron morphology (RDM) with abundant nanopores. Zn-N-C-RDM shows enhanced catalytic activity with bisphenol A (BPA) as model pollutant and peroxydisulfate (PDS) as oxidant. Molecular dynamic (MD) calculations show that mean square displacement (MSD) of PDS, BPA, and H 2 O molecules in the nanotunnels decreases obviously with smaller pore size. Due to the confinement, the BPA ( d i = 1.0 nm) and PDS ( d i = 0.5 nm) can easily enter and confined in the cavities of Zn-N-C-RDM. PDS can be therefore activated more easily to degrade BPA due to their faster diffusion and shorter transfer routes. > 97 % degradation of BPA can therefore be achieved by Zn-N-C-RDM within 20 min. Quenching experiments, electron paramagnetic resonance (EPR) and open circuit potential (OCP) results indicate that O 2 •− radical dominate the degradation. According to the density functional theory (DFT) results, the binding sites of Zn-pyridinic N are the main active sites. This work provides new insights for improving activity in Fenton-like reactions in the field of environmental remediation.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Zhaochuan Yu,Chao Deng,Chenhui Ding,Xing Zhang,Yuqian Liu,Chao Liu,Zhichao Lou,Farzad Seidi,Jingquan Han,Qiang Yong,Huining Xiao
Despite the tremendous efforts on developing antibacterial wearable textile materials containing Ti 3 C 2 T x MXene, the singular antimicrobial mechanism, poor antibacterial durability, and oxidation susceptibility of MXene limits their applications. In this context, flexible multifunctional cellulosic textiles were prepared via layer-by-layer assembly of MXene and the in-situ synthesis of zeolitic imidazolate framework-8 (ZIF-8). Specifically, the introduction of highly conductive MXene enhanced the interface interactions between the ZIF-8 layer and cellulose fibers, endowing the green-based materials with outstanding synergistic photothermal/photodynamic therapy (PTT/PDT) activity and adjustable electromagnetic interference (EMI) shielding performance. In-situ polymerization formed a MXene/ZIF-8 bilayer structure, promoting the generation of reactive oxygen species (ROS) while protecting MXene from oxidation. The as-prepared smart textile exhibited excellent bactericidal efficacy of >99.99 % against both Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) after 5 min of NIR (300 mW cm −2 ) irradiation which is below the maximum permissible exposure (MPE) limit. The sustained released Zn 2+ from the ZIF-8 layer achieved a bactericidal efficiency of over 99.99 % within 48 h without NIR light. Furthermore, this smart textile also demonstrated remarkable EMI shielding efficiency (47.7 dB). Clearly, this study provides an elaborate strategy for designing and constructing multifunctional cellulose-based materials for a variety of applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Kaihua Li,Yuchao Ma,Wei Zhao,Leixin Yang,Jinwei Zhang,Qian Zhang,Xiaohua Ma,Long Jiao,Zhen Yin,Bowen Cheng
The challenges of trade-off effect and long-term stability pose huge obstacles in the application of polymer-based gas separation membranes. In this study, we proposed a novel strategy to overcome these problems by in-situ thermally treating ZIF-8/polyimide mixed-matrix membranes (MMMs) at 300 °C. After thermally treatment, the T-ZIF-8 produced some unsaturated Zn site as defects that decreased BET surface area and the shrunk of micropore size as compared with ZIF-8. The MMMs with T-ZIF-8 significantly affects their gas separation performance and long-term stability, in which, the H 2 /CH 4 and CO 2 /CH 4 separation performance of T-ZIF-8/PI(3:10) and T-ZIF-8/PI(6:10) increased from far below the 2008 trade off lines for their PI matrix to approach or even above that. Additionally, both higher permeability and selectivity were observed for T-ZIF-8/PI(6:10) as compared with its precursor for H 2 /CH 4 separation, which was contributed by its higher H 2 diffusion coefficient (3834 vs 580 × 10 -8 cm 2 s −1 ) and H 2 /CH 4 diffusion selectivity (240 vs 154). Furthermore, the T-ZIF-8/PI (1:10) and T-ZIF-8/PI(3:10) MMMs demonstrate less than 15 % H 2 decreasing after 150 days, which is much better than that of the pristine PI membrane (26.7 %). These results probably contributed by the defected ZIF-8 loading induced extra ultra-micropore that caused size sieving effect and strong interaction with polyimide matrix that formed more rigid polymer chains. These findings propose a strategy to effectively enhance the gas separation performance and long-term stability by in-situ introducing the defect MOF in the polymer matrix.
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Small
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2024
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IF 13
Hongtao Zhang,Shiguo Yuan,Boyuan Zheng,Peng Wu,Xiuming He,Yi Zhao,Zhangfeng Zhong,Xiaofang Zhang,Jian Guan,Huajun Wang,Lei Yang,Xiaofei Zheng
Osteoarthritis (OA) is a progressively developing condition primarily characterized by the deterioration of articular cartilage and the proliferation of bone, along with ongoing inflammation. Although the precise pathogenesis remains somewhat elusive, restoring the homeostatic balance of the intra-articular microenvironment is crucial for the management of OA. Intra-articular injection of medication is one of the most direct and effective treatment methods; however, most injectable drugs used for osteoarthritis treatment, due to their rapid breakdown, quick release, poor biological activity, and frequent injections, leading to increased risk of infection and suboptimal therapeutic outcomes. In this study, a lubricating and dual-responsive injectable hydrogel based on zeolitic imidazolate frameworks-8 (ZIF-8) impregnated with Quercetin (Que) is designed, which can facilitate OA treatment by remodeling the microenvironment. The prepared injectable nanocomposite hydrogel (MH/CCM@ZIF-8@Que) exhibits pH and reactive oxygen species (ROS) responsiveness, alongside a controllable release of bioactive substances to modulate the microenvironment of bone tissue, thereby mitigating synovitis and the degeneration of cartilage matrix, while simultaneously facilitating cartilage repair. This developed thermosensitive injectable hydrogel, which effectively balances lubrication with the controlled release of bioactive substances, represents a highly promising therapeutic approach for osteoarthritis.
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FOOD AND CHEMICAL TOXICOLOGY
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2024
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IF 3.9
Yu Jiang,Yanqing Geng,Rufei Gao,Zhuxiu Chen,Jun Chen,Xinyi Mu,Yan Zhang,Xin Yin,Xuemei Chen,Fangfang Li,Junlin He
Adverse environmental factors during maternal gestation pose a threat to pregnancy. Environmental factors, particularly nanoparticles, can impact pregnancy by causing damage to the placenta. Compared to early gestation, foetuses in late gestation are more robustly developed and at lower risk of adverse effects from environmental factors. Delivery systems for targeted therapy during pregnancy is predominantly focused on their application in late gestation. Zeolitic imidazolate framework-8 (ZIF-8) holds great potential for targeted drug therapy. To evaluate the value of ZIF-8 in targeted treatment of disorders associated with late gestation, it is crucial to investigate the biological effects of ZIF-8 exposure during late gestation. Here, a mouse model exposed to ZIF-8 particles at different doses (5, 10, and 15 mg/kg) during late gestation was constructed. We found that ZIF-8 particles were deposited in the uterus of pregnant mice. ZIF-8 could trigger placental neutrophil aggregation and induce inflammation, which led to trophoblast pyroptosis and impair placental function, adversely affecting the foetus. Neutrophil depletion alleviated placental and foetal damage induced by ZIF-8. This study provides a novel mechanistic view of the reproductive toxicity induced by ZIF-8 and may offer clues to reduce the latent harm of adverse environmental factors to pregnancy.
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PROGRESS IN ORGANIC COATINGS
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2024
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IF 6.5
Bo Fang,Jie Xie,Dazhao Yu,Xinyue Zhang,Chaojie Jing,Hui Guo,Yuzhu Li,Wenzuo Li,Jie Liu
The hydrophilic benzimidazole@ZIF-8@tannic acid (ZBT) nanoparticles and the pH-responsive modified epoxy (EP) coatings based on ZBT were prepared innovatively. The result exhibited that the ZBT had excellent compatibility with the EP coatings, and the addition of ZBT improved the protective properties of the EP coatings, which were attributed to the formation of the Zn(OH) 2 deposition film, the inhibitor adsorption film and the ferric tannate film on the steel substrate. Meanwhile, the original adhesion and wet adhesion strengths of the ZBT/EP coatings were both enhanced, which was mainly attributed to the enhanced interaction between the ZBT/EP coatings and the carbon steel, and the crosslinking density and the degree of curing of the coatings were also improved. After 173 days of immersion, the impedance value of the ZBT coatings remained at 7.89 × 10 7 Ω·cm 2 , while the EP coatings decreased to 3.94 × 10 3 Ω·cm 2 . The wet adhesion loss of EP and ZBT/EP coatings was 63.6 % and 27.1 %, respectively. In the end, the protective mechanism of the ZBT/EP coatings was first proposed.
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ACS Applied Polymer Materials
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2024
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IF 4.4
Naipu He,Wen Li,Tingting Shi,Zongjie Li,Fengchuan Guo,Zongxin Li,Xuerui Zhao
ZIF-8@chitosan (CS)/polyvinylpyrrolidone (PVP) hydrogels (CPxHGZ) were fabricated by in situ growth of metal–organic framework (MOF) crystals on the network of CS/PVP semi-interpenetrating hydrogels. The ZIF-8 crystals were assembled in the channel of hydrogel and coated by networks of hydrogel. Morphology and distribution of the ZIF-8 crystals in CS/PVP hydrogels were modulated by the polymer network of hydrogels. PVP played a key role in guiding the growth of ZIF-8 crystals and preventing aggregation of ZIF-8 crystals in the network of CS/PVP hydrogel. Additionally, the PVP content in hydrogels influencing the adsorption capacity of CPxHGZ for CO2 was explored. With increasing PVP content in the hydrogels, the equilibrium adsorption of CPxHGZ for CO2 was increased. Especially, the equilibrium adsorption of CP10HGZ for CO2 was increased by 22%, which was higher than that of the pure ZIF-8 crystals. The results of kinetic simulation, XRD spectra, and FT-IR spectra revealed that the adsorption mechanism of CPxHGZ for CO2 was mainly chemisorption. The presence of multisites, including the amine groups in CS and PVP as well as metals in ZIF-8, was beneficial for enhancing the adsorption capacity of CPxHGZ for CO2.
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