ChemistrySelect
·
2024
·Vol. 9
·期 4
·e202304908
·
IF 1.9
Jiajia Yang,Yawei Chen,Yiting Cao,Weiming Liu,Tongtong Zhang,Huiyun Zhou
Graphical In this paper, the nanocomposites with dodecahedral structure ZIF-8@ZIF-67 and BBH@ZIF-8@ZIF-67 have been synthesized by one-pot method. Bimetallic MOFs ZIF-8@ZIF-67 exhibited superior antibacterial properties and good biocompatibility. BBH-loaded ZIF-8@ZIF-67 showed enhanced synergistic antibacterial activity. Molecular docking suggests that PBP2a and DHFR may be potential antibacterial targets of BBH. Stimulus-responsive nanocarrier materials have garnered significant attention in biomedical science. Among them, metal-organic frameworks (MOFs) have emerged as promising candidates due to their remarkable antibacterial properties and pH sensitivity. In this study, a pH-responsive bimetallic MOFs carrier, ZIF-8@ZIF-67, was successfully synthesized for the delivery of berberine hydrochloride (BBH). Comprehensive characterization using UV-Vis spectroscopy, FT-IR spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) confirmed the successful synthesis and structural integrity of ZIF-8@ZIF-67 and BBH@ZIF-8@ZIF-67. Subsequently, the drug release behavior, antibacterial efficacy, and biocompatibility of the composite material were systematically evaluated. Our findings revealed that BBH@ZIF-8@ZIF-67 exhibited well-controlled drug release properties, excellent antibacterial effects and biocompatibility. Furthermore, molecular docking results revealed that penicillin-binding protein 2a and dihydrofolate reductase in S. aureus may serve as two potential antibacterial targets for BBH. This research provides valuable insights into the use of bimetallic MOFs materials for developing highly efficient stimulus-responsive nanocarrier systems in biomedical applications.
研究领域:
纳米技术
·
生物医学科学
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材料科学
·
药学
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微生物学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Samreen Sadiq,Iltaf Khan,Muhammad Humayun,Ping Wu,Abbas Khan,Sohail Khan,Aftab Khan,Shoaib Khan,Amal Faleh Alanazi,Mohamed Bououdina
Toxic antibiotic effluents and antibiotic-resistant bacteria constitute a threat to global health. So, scientists are investigating high-performance materials for antibiotic decomposition and antibacterial activities. In this novel research work, we have successfully designed ZIF-8@ZIF-67 nanocomposites via sol–gel and solvothermal approaches. The ZIF-8@ZIF-67 nanocomposite is characterized by various techniques that exhibit superior surface area enhancement, charge separation, and high light absorption performance. Yet, ZIF-8 has high adsorption rates and active sites, while ZIF-67 has larger pore volume and efficient adsorption and reaction capabilities, demonstrating that the ZIF-8@ZIF-67 nanocomposite outperforms pristine ZIF-8 and ZIF-67. Compared with pristine ZIF-8 and ZIF-67, the most active 6ZIF-67@ZIF-8 nanocomposite showed higher decomposition efficacy for ciprofloxacin (65%), levofloxacin (54%), and ofloxacin (48%). Scavenger experiments confirmed that •OH, •O2–, and h+ are the most active species for the decomposition of ciprofloxacin (CIP), levofloxacin (LF), and ofloxacin (OFX), respectively. In addition, the 6ZIF-67/ZIF-8 nanocomposite suggested its potential applications in Escherichia coli for growth inhibition zone, antibacterial activity, and decreased viability. Moreover, the stability test and decomposition pathway of CIP, LF, and OFX were also proposed. Finally, our study aims to enhance the efficiency and stability of ZIF-8@ZIF-67 nanocomposite and potentially enable its applications in antibiotic decomposition, antibacterial activities, and environmental remediation.
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 39
·27203-27211
·
IF 3.9
Jiaxin Xiao,Shumin Zhu,Lingjun Bu,Yuan Chen,Ruoxi Wu,Shiqing Zhou
Halonitrophenols (HNPs) are an emerging type of aromatic disinfection byproduct, with detected concentrations of ∼nmol L−1 in source water and drinking water. Currently, there are no standard methods for identifying HNPs, and most of the reported methods are time-consuming and equipment-dependent. A core–shell metal–organic framework (MOF) based electrochemical sensor (Ag/ZIF-8@ZIF-67) capable of detecting 2,6-dichloro-4-nitrophenol (2,6-DCNP) is reported in this study. The electrochemical sensor obtains the concentration of 2,6-DCNP by detecting the peak current passing through the sensor. In this sensor, Ag nanoparticles (AgNPs) play a key role in electrochemical sensing by reducing nitro groups via electron transfer, and porous structure with a large surface area is offered by ZIF-8@ZIF-67. The cyclic voltammetry (CV) response of Ag/ZIF-8@ZIF-67 was found to be approximately 1.75 times and 2.23 times greater than that of Ag/ZIF-8 and Ag/ZIF-67, respectively, suggesting an ideal synergistic effect of the core–shell structures. The Ag/ZIF-8@ZIF-67 sensor exhibited exceptional sensitivity to 2,6-DCNP, exhibiting a broad linear response range (R2 = 0.992) from 240 nmol L−1 to 288 μmol L−1 and a low detection limit of 20 nmol L−1. Furthermore, the sensor exhibited good anti-interference for isomers and common distractors in water, excellent stability and reproducibility, and high recovery in actual water samples. Our reported sensor gives a novel strategy for sensitive, selective, and in situ detection of 2,6-DCNP in practical analysis.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yun Tang,Jingqi Ruan,Yalou Xin,Xiaohu Ren,Hudie Yuan,Xianhu Liu,Qiang Chen
The development of metal–organic frameworks (MOFs)-derived magnetic carbon-based materials for high-efficiency electromagnetic wave (EMW) absorption has attracted widespread attention. While these MOFs-derived composites have shown exceptional performance in absorbing EMWs within the X and Ku bands, the pursuit of effective absorption at lower frequencies remains a challenge. Herein, we demonstrate a novel strategy to synthesize hollow Co@C/C rods with excellent C-band EMW absorption via acetic acid etching and pyrolysis of core–shell ZIF-8@ZIF-67. Based on acetic acid etching, ligand-deficient ZIF-8@ZIF-67 rods with abundant mesoporous structures are constructed, enabling precise control over the Co nanoparticles content, graphitization degree, and pyridinic N doping in the derived Co@C/C. This simple fine-tuning approach simultaneously reduces dipole polarization by lowering the pyridinic N doping concentration, suppresses interfacial polarization and conduction loss through reducing the number of graphitic carbon layer, and enhances magnetic loss by increasing the Co content. These combined effects collectively improve the impedance matching of Co@C/C for low-frequency absorption. Notably, as the volume of acetic acid solution increases, the absorption frequency band of Co@C/C gradually shifts from the Ku-band to the C-band, while sustaining superior EMW absorption performance. At the filling ratio of merely 11 %, the RL min values for Co@C/C-20 and Co@C/C-30 achieve −49.8 dB and −34.7 dB at 7.2 GHz and 6.8 GHz, respectively. This study offers a valuable approach to the development of lightweight materials with excellent EMW absorption in C-band.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 27
·12387-12398
·
IF 2.7
Yafeng Jin,Fangming Han,Tao Wang,Haofu Shi,Xiaobo Li,Li Yang,Na Chen,Kaifeng Yang,Xinyue Song,Guangri Xu
Developing a facile and effective assay method is crucial due to the potential harm of metronidazole (MNZ) antibiotics to both human health and the environment. Herein, snowflake-shaped poly(3-thiophenemalonic acid, 3-TPA) combined with a carbonized core–shell-type ZIF-8@ZIF-67 (C-ZIF-8@ZIF-67) hollow polyhedra modified glassy carbon electrode (GCE), denoted as C-ZIF-8@ZIF-67/P3TPA/GCE, was fabricated by electropolymerization followed by the electrodeposition strategy. The resulting sensor demonstrates a significant electrocatalysis effect for the reduction reaction of MNZ, exhibiting a broad linear range (0.1–20, 20–800 μM) with a low limit of detection (LOD, 3S/N) of 0.024 μM. Furthermore, it has been successfully applied to determine MNZ in tablets and lake water. A synergistic effect between P3TPA and C-ZIF-8@ZIF-67 is elucidated through density functional theory (DFT) calculations. Consequently, this research introduces a sensitive and effective method for monitoring MNZ in real samples.
研究领域:
材料科学
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环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Aotian Gu,Jiuyu Chen,Qianhong Gao,Muhammad Musaa Khan,Peng Wang,Yan Jiao,Zongxiang Zhang,Ying Liu,Yi Yang
The high effective Ag/ZIF-8@ZIF-67 core-shell composite was fabricated by a convenient strategy and applied in the reduction of 4-nitrophenol. The obtained samples were fully characterized by transmission electron microcopy (TEM), element mapping, X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and the like. Catalytic experiments showed that the Ag/ZIF-8@ZIF-67 exhibit superior catalytic activity in the reduction of 4-nitrophenol and another two nitroaromatic compounds. The apparent rate constant (K app ) and the conversion frequency (TOF) of Ag/ZIF-8@ZIF-67 0.4 for 4-nitrophenol were 12.22 × 10 −3 s −1 and 5.611 min −1 , respectively, and preserved high catalytic performance after four cycles. The catalytic activity of Ag/ZIF-8@ZIF-67 was significantly increased compared to Ag/ZIF-8, which was mainly attributed to the high specific surface area of ZIF-8@ZIF-67, the synergy of ZIF-8 core and ZIF-67 shell and the restriction of pores to Ag NPs.
研究领域:
材料科学
·
环境化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Baozhong Lü,Weijie Qi,Mingsheng Luo,Qinglong Liu,Lin Guo
The preparation of highly active and stable catalysts for syngas conversion is a major challenge for Fischer–Tropsch synthesis (FTS). Herein, we report a strategy to prepare a highly dispersed Co-embedded porous carbon nanocage (CoPCN) structure derived from a core–shell metal–organic framework (MOF) ZIF-8@ZIF-67 precursor. High Co loading (over wt 30%) is achieved while maintaining an optimal dispersion and particle size of the active Co phase when a ZIF-8@ZIF-67 is pyrolyzed at 920 °C. Besides, the porous channels and hollow structures of the CoPCN strengthen the diffusion of reactants and the hydrocarbon product, enhancing the C5+ selectivity and CO conversion. The CoPCN shows high stability in FTS with a CO conversion of 18.3%, 80.2% selectivity for long-chain hydrocarbons (C5+), and 8.9% selectivity for short-chain hydrocarbons (C2–C4) after 100 h time on stream. Compared with other MOF-derived FTS catalysts, CoPCN-920 can achieve higher C5+ selectivity at a lower reaction temperature. The present work uncovers the relationship between the porous structure and catalytic performance, providing an efficient method to prepare promising materials for enhanced FTS stability, activity, and selectivity.
研究领域:
化学工程
·
材料科学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Research
·
2020
·
IF 6.992
Tengfei Li,Meng Lu,Yuhang Gao,Xiaodong Huang,Guangyang Liu,Donghui Xu
In this study, a novel metal-organic framework (M-ZIF-8@ZIF-67) was successfully prepared using the single layer Fe 3 O 4 -ZIF-8 as magnetic core and wrapped a layer of ZIF-67 outer. This M-ZIF-8@ZIF-67 was employed as an adsorbent for the adsorption and removal of fipronil and its metabolites from environmental water and cucumber samples. The characterization results suggested that M-ZIF-8@ZIF-67 has the double layer structure a polyhedral structure with uniform pores, while ZIF-67 was successfully coated on the surface of Fe 3 O 4 -ZIF-8. The unique structure endowed M-ZIF-8@ZIF-67 a high surface area (219 m 2 /g) and high adsorption capacity for fipronil, fipronil desulfinyl, fipronil sulfide and fipronil sulfone. To our knowledge, this is the first report detailing the adsorption properties of M-ZIF-8@ZIF-67 with double layer structure relating to the adsorption and removal of pesticides. Furthermore, the adsorption model analysis demonstrated that the static adsorption data fitted the Freundlich bimolecular layer adsorption model better than the Langmuir monolayer adsorption model. This study indicates that M-ZIF-8@ZIF-67 has significant potential in the adsorption and removal of fipronil and its metabolites in water and vegetable samples.
研究领域:
环境科学
·
材料科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Yuping Li,Ping Xiang,Haotian Chen,Yuan Zhou
The discharge of dye wastewater threatens the ecology and biological health. Adsorption technology is the preferred treatment method and absorbent is core. In this study, a high-performance ZIF-8@ZIF-67 adsorbent was synthesized by epitaxial growth . XRD and TEM demonstrated the successful synthesis of the core-shell ZIF-8@ZIF-67 and BET showed that the specific surface area, pore volume and diameter of ZIF-8@ZIF-67 were 1518.75 m 2 /g, 0.65 cm 3 /g and 1.71 nm, respectively, with microporous being the predominant. The optimum adsorption conditions for the adsorption of Direct Blue-86 by ZIF-8@ZIF-67 were an initial concentration of 150 mg/g, a ZIF-8@ZIF-67 dosage of 5 mg, and a pH of 8, and the adsorption capacity at this condition was 301.69 mg/g. The mechanism of adsorption on Direct Blue-86 has been speculated to be electrostatic interaction , hydrogen bonding , Lewis acid-base interaction, π-π stacking and coordination. The kinetics of adsorption of Reactive Yellow and Congo Red in the two-component system were both consistent with the pseudo-second-order kinetic models , with chemisorption being the rate-controlling step and the adsorption rates of Reactive Yellow and Congo Red were both higher than that of one-component system. Meanwhile, they were more consistent with the Langmuir monolayer adsorption models, with maximum adsorption capacities of 261.10 mg/g and 291.55 mg/g, respectively, a decrease of 56.66% and 54.52% compared to that in the one-component system.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 15
·e202200438
·
IF 4.782
Beibei Yang,Mengjiao Shao,Yufeng Xu,Yanyan Du,Hualing Yang,Duan Bin,Baohong Liu,Hongbin Lu
Graphical A novel electrochemical sensor based on core-shell ZIF-8@ZIF-67-derived Co nanoparticles/N-doped carbon nanotube polyhedron composites has been designed for the efficient determination of antibiotic drug chloramphenicol. In this work, we developed a highly selective detector towards the antibiotic drug chloramphenicol (CAP) using Co nanoparticle, which are grown in situ on N-doped carbon nanotube polyhedra (Co@NCNP), which are obtained by a pyrolysis strategy derived from core-shell ZIF-8@ZIF-67. Physical characterization verified that metal-organic framework (MOFs)-derived Co@NCNP nanocomposites present a nanotube structure on their mesoporous polyhedron surface. As a result, the as-prepared Co@NCNP can be used as a sensitive electrochemical sensor for chloramphenicol detection, and the modified electrode is also studied by electrochemical methods such as electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry (DPV). When compared with single ZIF-67-derived electrode, the Co@NCNP displays a higher electrocatalytic activity in the presence of chloramphenicol. Moreover, an excellent performance with a linear response range of 5–268.83 μM and a low detection limit of 0.5 μM (S/N=3) is observed for the Co@NCNP modified electrode. Finally, the fabricated chloramphenicol sensor achieves a good anti-interference ability, stability, excellent repeatability, and remarkable reproducibility. The sensor also could be applied in human serum to determine of chloramphenicol with a satisfactory result.
研究领域:
材料科学
·
电化学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Niu Liu,Jun Cheng,Wen Hou,Xiao Yang,Junhu Zhou
In order to form strengthened active sites for superior CO 2 adsorption on core shell ZIF-8@ZIF-67 nanocomposites , graphene oxide (GO) with oxygen-containing functional groups was used as support to synthesize hybrid adsorbents with unsaturated Zn–N 2 –O active sites. The results of XPS O 1s and FTIR analysis revealed that the Me–O functional group content in the 0.5 wt% graphene oxide (GO)-supported core shell ZIF-8@ZIF-67 nanocomposite (38.9 at.%) was much higher than that in the 0.5 wt% reduced graphene oxide (RGO)-supported nanocomposite (19.4 at.%). This was because hydroxyl functional groups in the GO formed coordination bonds with zinc atoms in core shell ZIF-8@ZIF-67. XPS N 1s spectra indicated that the incorporation of oxygen-containing functional groups in GO resulted in the transition of binding form from Me–N 4 to Me–N 2 . The CO 2 adsorption capacity of GO-supported core shell ZIF-8@ZIF-67 gradually decreased from 2.15 to 1.30 mmol/g as GO weight percentage increased from 0.5 to 4 wt%, which was consistent with the decrease in BET surface area from 1378 to 585 m 2 /g and increase in peak pore diameter from 7.7 to 8.2 Å. Density functional theory (DFT) calculations demonstrated that unsaturated Zn–N 2 –O active sites in GO-supported core shell ZIF-8@ZIF-67 nanocomposites resulted in a decreased O C⋯Zn interaction distance from 4.65 (Zn–N 4 sites in core shell ZIF-8@ZIF-67) to 3.46 Å and an increased binding energy from 34.02 to 38.87 kJ/mol. Therefore, 0.5 wt% GO-supported core shell ZIF-8@ZIF-67 nanocomposites exhibited the highest CO 2 adsorption capacity of 2.15 mmol/g (at 273 K and 1 bar), 1.34 times higher than that of core-shell ZIF-8@ZIF-67.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 23
·35204-35216
·
IF 5.19
Song Xu,Mo Jingqian,Fang Yuting,Luo Shumin,Xu Jingjing,Wang Xu
We prepared a double-layer magnetic nanocomposite Fe 3 O 4 @ZIF-8@ZIF-67 by layer-by-layer self-assembly. Fe 3 O 4 @ZIF-8@ZIF-67 was used to remove tetracycline from an aqueous solution via a combination of adsorption and Fenton-like oxidation. Depending on the outstanding porous structure of the Fe 3 O 4 @ZIF-8@ZIF-67, a high adsorption capacity for tetracycline was 356.25 mg g −1 , with > 95.47% removal efficiency within 100 min based on Fenton-like oxidation. To better understand the mechanisms involved in integrated adsorption and Fenton-like oxidation, various advanced characterization techniques were used to monitor the changes in morphology and composition of Fe 3 O 4 @ZIF-8@ZIF-67 before and after removal of tetracycline. Scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) all supported adsorption and Fenton oxidation of tetracycline. This study extends the application of Fe 3 O 4 @ZIF-8@ZIF-67 for environmental remediation. Graphical abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）