JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 9
·7083-7093
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IF 2.993
Zhang Mi,Shi Xiaowei,Dai Xiu,Huo Changan,Xie Jiong,Li Xu,Wang Xinlong
The nano-ZIF-8@GO hybrids were synthesized and blended with poly(lactic acid) (PLA) by solution method. The effect of nano-ZIF-8@GO hybrids on the crystallization was investigated by DSC and POM. The results showed that low addition amount of nano-ZIF-8@GO had a significant influence on the crystallization behavior of PLA. The tensile strength and elongation at break of the PLA/ZIF-8@GO nanocomposites with 0.5 wt% of ZIF-8@GO were increased to 49.63 MPa and 24.10% compared with 35.83 MPa and 17.66% of the pure PLA, respectively. The addition of nano-ZIF-8@GO hybrids also enhanced the flame retardancy of PLA, and the mechanism was proposed.
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ACS Omega
·
2024
·
IF 3.7
Qi Tao,Hang Yao,Feifei Wang,Zehao Gu,Xiaofei Yang,Yuchi Zhao,Huan Pang,Dong-An Wang,Hui Chong
Ulcerative colitis (UC) is a chronic inflammatory bowel disease characterized by the disruption of the intestinal epithelial barrier. This study described the synthesis and characterization of CCM-Co-ZIF-8, a novel composite material with enzyme-like activities similar to catalase, peroxidase, and superoxide dismutase. CCM-Co-ZIF-8 demonstrated the ability to scavenge reactive oxygen species that play a critical role in UC pathogenesis. In vitro studies using lipopolysaccharide-induced RAW264.7 cells showed that CCM-Co-ZIF-8 exhibited anti-inflammatory activity by promoting the transition of macrophages from an M1 to an M2 phenotype. In vivo experiments using a mouse model of UC demonstrated that CCM-Co-ZIF-8 suppressed the expression of proinflammatory cytokines. These findings suggested that CCM-Co-ZIF-8 might hold promise as a therapeutic strategy for the treatment of UC.
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PubMed
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xinyuan Yan,Juan Chai,Luohao Yuan,Hongfeng Yin
Glutathione (GSH), as an significant intracellular antioxidant, plays a vital role in preserving the balance of cellular redox homeostasis. The accurate and sensitive detection of GSH is essential for understanding the cellular redox status and for the diagnosis and treatment of many diseases. Herein, a core–shell structure composed of glucose oxidase (GOx), platinum (Pt) nanoparticles and a zeolitic imidazolate framework (ZIF-8) shell was constructed. Pt NPs in the core–shell showed high peroxidase-like catalytic activity. The as-prepared Pt-GOx@H-ZIF-8 can be utilized for colorimetric detection of GSH, exhibiting a broad linear range from 0.5 to 90 μM, and a low limit of detection (LOD) of 0.4 μM. Pt-GOx@H-ZIF-8 showed excellent sensitivity, selectivity and stability towards glutathione detection, making it a promising candidate for intracellular antioxidants.
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Nanomaterials
·
2025
·Vol. 15
·期 2
·105
·
IF 4.3
Jiuyu Chen,Chensheng Gao,Jingwen Chen,Fei Liu,Zhiwen Liu
The development of copper-based materials with a high efficiency and low cost is desirable for use in iodine (I2) remediation. Herein, Cu0-nanoparticles-functionalized, ZIF-8 (Zeolite Imidazole Framework-8)-derived, nitrogen-doped carbon composites (Cu@Zn-NC) were synthesized by ball milling and pyrolysis processes. The as-prepared composites were characterized using SEM, BET, XRD, XPS, and FT-IR analyses. The results showed that the morphology of ZIF-8 changed from a leaf-like structure into an irregular structure after the introduction of a copper salt and carbonization. The copper in the pyrolysis samples was mainly in the form of Cu0particles. The presence of an appropriate amount of Cu0particles could increase the specific surface area of Cu@Zn-NC. The subsequent batch adsorption results demonstrated that the as-fabricated composites showed high I2adsorption amounts (1204.9 mg/g) and relatively fast dynamics in an iodine–cyclohexane solution when the Cu content was 30% and the pyrolysis temperature was 600 °C, outperforming the other Cu-based materials. The isothermal adsorption followed both Langmuir and Dubinin–Radushkevich isotherm models, while the kinetics of I2adsorption followed a pseudo-second-order kinetic model. The activation energy (Eα) of the adsorbent was determined to be 47.2 kJ/mol, according to the Arrhenius equation. According to the experimental and DFT analyses, I2-Zn interactions and I2-Cu0chemisorption jointly promoted the elimination of iodine. In general, this study provided an operative adsorbent for the highly effective capture of iodine in solution, which might be worth applying on a large scale.
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OPTICAL MATERIALS
·
2024
·
IF 3.8
Yangqing Li,Xiaofeng Zhang,Chengke Huang,Haixia Lyu
The photocatalytic degradation of dyes by graphitic carbon nitrides (g-C 3 N 4 ) under sunlight has received increased attention. However, the fast recombination of charge carriers still restricts its photocatalytic application. To overcome this drawback, a g-C 3 N 4 /Mn 3 O 4 /ZIF-8 (CMZ) composite was prepared to activate peroxymonosulfate (PMS)-based advanced oxidation processes for degradation of rhodamine B (RhB) in water. Under visible light , the catalysts exhibited high activity and stability in activating PMS to generate radicals ( · OH, · O 2 − and SO 4 · - ) and the maximum RhB degradation of approximately 94.34 % was achieved. The RhB degradation followed first‐order kinetics and the rate constant of g-C 3 N 4 /Mn 3 O 4 /ZIF-8/PMS system was 2.85, 3.09, 9.82 and 17 times of g-C 3 N 4 , Mn 3 O 4 , ZIF-8 and PMS, respectively. Moreover, the synergistic effect of CMZ and PMS on the removal efficiencies of total organic carbon (TOC) for RhB and wastewater were 92.84 % and 96.13 %, respectively. After five cycles of use, the degradation rate of the prepared catalyst for RhB only decreased by 1.7 %. This work provided new insights that the synergistic effect of advanced oxidation technologies and photocatalysis holds broad prospects for the photodegradation of RhB.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xu-Wei Luo,Ming-Ran Zhou,Mao-Jin Ran,Dao-Xiang Xun,Jia-Le He,Zhi-Yi Hu,Hemdan S.H. Mohamed,Jing Liu,Li-Hua Chen,Yu Li,Bao-Lian Su
Lithium-selenium (Li-Se) batteries have attracted increasing attention because of excellent carbonate electrolyte compatibility, comparable theoretical volumetric specific capacity and high electrical conductivity. However, there are still unavoidable issues such as large volume expansion, rapid capacity decay and slow electrochemical reaction kinetics for practical applications. In this work, we report 2D ZIF-8 derived N-doped porous carbon nanosheets (NPC-NS) as Se host for high-performance Li-Se batteries. The unique 2D structure of Se@NPC-NS facilitates Li + diffusion and charge transfer, thus the Se@NPC-NS cathode exhibits fast electrochemical reaction kinetics. In addition, the N doping enhances electronic conductivity and porous structure mitigates the volume expansion. As a result, the Se@NPC-NS cathode delivers a high reversible capacity of 585 mAh/g with a capacity retention of 99.1 % at 0.5C (1C = 675 mA g −1 ) after 225 cycles. Especially after 500 cycles at a high current density of 10C, the Se@NPC-NS cathode still displays a reversible specific capacity of 307 mAh/g with only 0.03 % capacity decay per cycle. This work would shed some light on the 2D carbon host as Se-based cathode for high-rate and long-life performance Li-Se batteries.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 3.7
Guozhen Li,Shiqi Ling,Yuhui Cui,Shilong Dong,Tianyin Liu,Ting Li,Siyu Pang,Peiyong Qin
Zeolitic imidazolate framework-8 (ZIF-8) is a typical filler used to fabricate mixed matrix membranes (MMMs) on account of its attractive advantage of high selective permeability for gas separation. However, the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers, However, the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers, which will lead to a decrease of selectivity and the performance of gas separation will be strongly influenced. Herein, we modified ZIF-8 with 3-amino-1,2,4-triazole to obtain ZIF-8-NH 2 , Kapton polyamide acid was selected as the polymer matrix. Results showed that the ZIF-8-NH 2 /Kapton MMMs has a good compatibility interface between ZIF-8 and Kapton because of the covalent bridging, even the filler loading up to 45% (mass). The 45% (mass) of ZIF-8-NH 2 /Kapton membrane showed 297 barrer (1 barrer = 10 −10 cm 3 ·cm·cm −2 ·s –1 ·cmHg –1 , 1 cmHg = 1333.22 Pa, standard temperature and pressure) of the permeability of H 2 and 43.9 and 62.2 of selectivities for H 2 /N 2 and for H 2 /CH 4 , respectively, which are beyond the upper limit of Robeson 2008.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2017
·
IF 3.012
Gege Yu,Jianfei Xia,Feifei Zhang,Zonghua Wang
A hierarchical and hybrid nanocomposite of reduced graphene oxide/zeolitic imidazolate framework-8 (RGO/ZIF-8) has been successfully fabricated by the RGO as template for the in situ growth of ZIF-8. The morphology and structure of the resulted RGO/ZIF-8 nanocomposite were characterized by using scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was demonstrated that ZIF-8 nanoparticles anchored and grew well on the surfaces of RGO. The electrocatalytic activity of the RGO/ZIF-8 towards the dopamine (DA) was investigated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results demonstrated the fabricated RGO/ZIF-8 sensor exhibited high sensitivity for the determination of DA, owing to the synergistic effect from highly electrical conductivity of RGO and porosity of ZIF-8. Under the optimal conditions, the linear response range for DA was from 1.0 × 10 − 7 to 1.0 × 10 − 4 mol L − 1 and the detection limit of DA was estimated to be as low as 3 × 10 − 8 mol L − 1 . Moreover, the prepared electrochemical sensor also showed excellent selectivity for DA detection in the presence of ascorbic acid (AA) and prospective results in real samples detection.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Jia Gao,Jing Ren,Hanjie Ye,Wenhui Chu,Xuankai Ding,Lingzhi Ding,Yongqian Fu
Angiogenesis is pivotal for osteogenesis during bone regeneration. A hydrogel that promotes both angiogenesis and osteogenesis is essential in bone tissue engineering. However, creating scaffolds with the ideal balance of biodegradability, osteogenic, and angiogenic properties poses a challenge. Thymosin beta 10 (TMSB10), known for its dual role in angiogenesis and osteogenesis differentiation, faces limitations due to protein activity preservation. To tackle this issue, ZIF-8 was engineered as a carrier for TMSB10 (TMSB10@ZIF-8), and subsequently integrated into the self-assembled sericin hydrogel. The efficacy of the composite hydrogel in bone repair was assessed using a rat cranial defect model. Characterization of the nanocomposites confirmed the successful synthesis of TMSB10@ZIF-8, with a TMSB10 encapsulation efficiency of 88.21 %. The sustained release of TMSB10 from TMSB10@ZIF-8 has significantly enhanced tube formation in human umbilical vein endothelial cells (HUVECs) in vitro and promoted angiogenesis in the chicken chorioallantoic membrane (CAM) model in vivo . It has markedly improved the osteogenic differentiation ability of MC 3 T3-E1 cells in vitro . 8 weeks post-implantation, the TMSB10@ZIF-8/ Sericin hydrogel group exhibited significant bone healing (86.77 ± 8.91 %), outperforming controls. Thus, the TMSB10@ZIF-8/Sericin hydrogel, leveraging ZIF-8 for TMSB10 delivery, emerges as a promising bone regeneration scaffold with substantial clinical application potential.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shuhui Hu,Lin-Lin Yang,Chang Yan,Yanan Xiao,Zijing Jin,Xiuhai Gan,Bo Zhang,Wenneng Wu
Environmental stimulus-responsive controlled-release nanopesticides have the ability to adapt to the specific microenvironment of pathogen outbreaks, which can improve pesticide utilization efficiency. A pH and redox dual-stimuli responsively controlled release system (ZIF-8@Hex@Fe/GA) using zeolitic imidazolate framework-8 (ZIF-8) as the support and metal-phenol complex (Fe-GA) as the capping agent was constructed to deliver hexaconazole (Hex) for management of Phomopsis sp. The ZIF-8@Hex@Fe/GA composite demonstrated a high loading capacity and effectively improved the light stability of Hex. The hydroxyl groups present in the composite facilitate its diffusion on kiwifruit leaves, improving wettability. Additionally, the large specific surface area of ZIF-8@Hex@Fe/GA provides resilience against rainwater scouring. This innovative system intelligently responds to the acidic and oxidizing conditions associated with Phomopsis sp. infections, ensuring targeted and controlled release of Hex. Bioactivity assessments revealed that ZIF-8@Hex@Fe/GA exhibited protective effects of 84.16 ± 3.37 % and 80.77 ± 2.08 % on kiwifruit fruits and leaves at a concentration of 100 mg/L, outperforming Hex emulsifiable concentrate (Hex EC) by 21.34 % and 25.39 %, respectively. The acute toxicity of ZIF-8@Hex@Fe/GA to zebrafish was reduced 9-fold compared to Hex EC. Furthermore, ZIF-8@Hex@Fe/GA showed high safety for HEK293 cells, with a cell survival rate of 81.59 ± 2.11 % after 72 h of 10 mg/L treatment, whereas the cell survival rate for Hex TC, treatment was only 1.79 ± 1.32 % after 72 h. In conclusion, ZIF-8@Hex@Fe/GA demonstrates significant potential for targeted pesticide delivery and environmental protection.
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ChemSusChem
·
2024
·
IF 7.5
Yanan Dong,Ju Bai,Luqi Xiao,Shangqing Chen,Lu Bai,Huaigang Cheng,Linglong Shan,Junfeng Wang,Yi Nie
Graphical Polyethyleneimine (PEI)-templated ZIF-8 (PEI-ZIF-8) was synthesized and incorporated into the PEI aqueous solution, then interfacial polymerized with trimesoyl chloride (TMC) to obtain the PEI-ZIF-8 modified polyamide NF membrane. The optimal PEI-ZIF-8-TMC membrane exhibits a permeance of 9 L/h m 2 bar and a Mg 2+ /Li + separation factor (SF) of 19. MOFs-modified nanofiltration (NF) membranes have been gained a lot of attention due to their favorable permeability and ion separation performance. Nevertheless, the prevailing preparation techniques are afflicted by the incompatibility of MOFs with polymers and the facile loss of MOFs. In this work, polyethyleneimine (PEI)-templated ZIF-8 (PEI-ZIF-8) was synthesized and incorporated into the PEI aqueous solution, then interfacial polymerized with trimesoyl chloride (TMC) to obtain the PEI-ZIF-8 modified polyamide NF membrane. This PEI modified strategy could endow the ZIF-8 nanoparticles with positively charged properties to avoid the aggregation and increase the interfacial compatibility with the polyamide. Meanwhile, the appropriate pore size of ZIF-8 (3.4 Å), which is between the hydration sheath surrounding of Li + (2 Å) and Mg 2+ (4.2 Å) impart the membrane with precise Mg 2+ /Li + separation ability. The optimal PEI-ZIF-8-TMC membrane exhibits a permeance of 9 L/h m 2 bar and a Mg 2+ /Li + separation factor (SF) of 19, both of which surpass the performance of the pure PEI-TMC membrane, which has a permeance of 4 L/h m 2 bar and a Mg 2+ /Li + separation factor of 11. Meanwhile, the membrane exhibited excellent long-term stability of 85 h. This novel approach to preparing MOFs-modified NF membrane represents a promising avenue for the separation of lithium and magnesium.
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RSC Advances
·
2024
·Vol. 14
·期 14
·9996-10003
·
IF 3.9
Zijie Wei,Cuifeng Jiang,Jinshan Wang,Yue Chen
Metal organic framework (MOF)-derived nanostructures display remarkable characteristics and have broad application potential. Os@ZIF-8 nanocomposites were prepared by a depositional method. The Os nanoparticles distributed on the surface of ZIF-8. The nanocomposites displayed enhanced peroxidase-like activity with smaller Km for both 3,3′,5,5′-tetramethylbenzidine (TMB) and H2O2 compared to Os NPs due to the confinement effect and large surface area that ZIF-8 provided. From the average reaction rate constants obtained from three different temperatures, the activation energy values were determined. The kinetic data indicated that the Os@ZIF-8 NCs are catalytically more active than Os NPs. In addition, quantitative measurement of Hg2+ was performed based on the formation of Os–Hg alloy. Os@ZIF-8 NCs had a wide detection range between 0 μM and 71.43 μM for Hg2+ with a limit of detection (LOD) of 2.29 μM. Using a MOF with a large surface area to load Os nanoparticles to achieve enhanced nanozyme activity is the novelty of this work.
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