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
高影响因子
MICROCHEMICAL JOURNAL
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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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FUEL
·
2025
·
IF 7.5
Zhengyu Yang,Jianmin Li,Yubin Wang,Mengyao Shi,Jide Wang,Changyan Guo
Zeolitic imidazolate frameworks (ZIFs) are rich in accessible and active Lewis acid-base sites and hierarchical pores, making them effective catalysts for the cycloaddition of CO 2 to epoxides under mild conditions. In this study, a facile defect-engineering strategy using acid etching and ligand exchange was developed to convert three-dimensional ZIF-L into layered Br-ZIF-L with a tire-like surface, abundant active sites, and a structure optimized for efficient mass diffusion. This modification enabled the rapid cycloaddition of CO 2 to propylene oxide under mild conditions (1 MPa and 100 °C for 2 h). The resulting cyclic carbonate was obtained in 92 % yield and 100 % selectivity. Additionally, Br-ZIF-L exhibited excellent chemical stability without a loss of catalytic activity after six consecutive cycles, highlighting its potential as a high-performance catalyst for CO 2 conversion. The developed catalytic system exhibited a conversion rate of >90 % for five different substituted epoxides. This study introduces an efficient approach for synthesizing cyclic carbonates via CO 2 fixation under mild conditions.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Qiang Liu,Zizi Zhang,Xiang Zhang,Junling Chen,Hongwu Ma,Leizhi Zheng,Keliang Wu,Yanlong Tai
The capture and conversion of CO 2 are crucial for achieving carbon reduction targets. Currently, porous carbon is regarded as the most promising material for CO 2 capture, but it is limited by the lack of effective catalytic conversion functional sites. Frustrated Lewis Pairs (FLPs) are considered the most promising metal-free catalysts for CO 2 conversion, but homogeneous catalytic systems fall short of meeting industrial demands. To address this, this paper selected zeolitic imidazolate frameworks (ZIF-8 and ZIF-67) derived N-doped porous carbon (ZIF-8-C and ZIF-67-C) as Lewis base and subsequently introduces B(C 6 F 5 ) 3 to construct B/N-based FLPs, namely ZIF-8-C-FLPs and ZIF-67-C-FLPs. This approach aimed to simultaneously enhance the catalytic conversion ability of porous carbon towards CO 2 and the heterogenization of FLPs. These ZIF-8-C-FLPs and ZIF-67-C-FLPs exhibited exceptional CO 2 capture capacity, with CO 2 adsorption capacities of 57.4 and 41.2 cm 3 /g at 273.15 K and 1 bar, respectively. Additionally, ZIF-8-C-FLPs and ZIF-67-C-FLPs were utilized to catalyze the preparation of benzimidazole and benzoxazole from o-phenylenediamine and o-aminophenol with CO 2 , demonstrating excellent catalytic performance (yields above 86 %) and recyclability (at least 8 cycles).
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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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Analytical Methods
·
2024
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IF 2.7
Yuting Luo,Yiwei Sun,Haoxiang Wang,yuyang He,Yuxun Zhang,Hailu Lei,Hong Yang,Jinhao Wei,Dongpo Xu
C-ZIF-67@PAN nanofiber was prepared as active materials for ampicillin (AMP) detection. MOF materials can provide larger specific surface area and more binding sites. The PAN fiber can make ZIF-67 orderly arranged, further carbonization, enhance the conductivity of the material, and make the response more sensitive. The gold nanoparticles were incorporated into the material, and the aptamer was closely combined with the material by using the Au-S bond. And further enhance the conductivity of the material. Under optimized conditions, the sensor has a wide detection range (0.001~100 μM) and a low detection limit (0.67 nM). In addition, the C-ZIF-67@PAN@Au@Apta nanofiber sensor was successfully applied to AMP residues in milk samples with a recovery rate of 92.77 % ~ 101.95 %.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Pengfei Lin,Xiwei Qu,Bhaskar Jyoti Deka,Chao Hu,Lei Zhao,Dongyun Wu,Chunhai Yi,Min Wei Boey,Muhammad Usman Farid,Alicia Kyoungjin An,Jiaxin Guo
The photocatalytic Metal-organic frameworks (MOFs) membrane addresses challenges faced by MOF powders in practical applications such as aggregation and difficult recovery, but its current application is mainly confined to wastewater treatment. Expanding the application of MOFs membranes to CO 2 reduction could unleash their greater potential in energy conversion and storage field. In this study, ZIF-67 was deposited on polyacrylonitrile (PAN) nanofiber membranes (NFMs) using an in-situ growth technique, followed by thermal stabilization to produce SZIF-67/PAN NFMs for photocatalytic CO 2 reduction. ZIF-67 was uniformly and densely distributed on the NFMs, with a mass loading of up to 8 wt%. The thermal stabilization process significantly enhanced the photothermal conversion capability and solvent resistance of the NFMs, enabling SZIF-67/PAN NFMs to exhibit outstanding photocatalytic activity even under mild environmental conditions, with a remarkable CO generation rate of 39,250 μmol g −1 h −1 . Furthermore, the performance remained at 70 % even after five consecutive tests. This study presents a novel and effective method for preparing MOF NFMs with excellent photocatalytic CO 2 reduction performance, offering valuable insights for advancing the practical application of MOF materials.
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Materials Today Chemistry
·
2024
·
IF 6.7
Li Jiang,Meng Xu,Mianyu Bao,Yanmao Dong,Yan Yuan,Xing Zhou,Xiangkang Meng
The harsh acidic environment containing chloride ions has created serious corrosion hazards for ferritic stainless steels . Zeolitic imidazole frameworks (ZIFs) are a promising material for corrosion protection due to their microstructural and physicochemical properties. In this study, we proposed the electrodeposited ZIF-67 reinforced polypyrrole (PPY) coating (PPY/ZIF-67) for corrosion protection of 430 ferritic stainless steel (430SS). The morphology, microstructure, and anticorrosion behavior of the pristine PPY and hybrid PPY/ZIF-67 coating systems were characterized. The successful electrodeposition of ZIF-67 nanoparticles on the surface of the PPY layer resulted in a uniform distribution and a compact coating structure, which contributed to the overall uniformity of the coating and enhanced both the barrier and activity inhibition functions of the coating. The protective performance of PPY/ZIF-67 coatings was evaluated through electrochemical tests, the results indicated that the anticorrosion efficiency of PPY/ZIF-67 coating (with 0.4 mol/L pyrrole monomer content) reached to 99 %, and the coating demonstrated a durable corrosion protection ability (744 h) in 0.1 mol/L HCl solution. Such performance of can be attributed to the combined effect of the anodic protection provided by the inner PPY film, the active corrosion inhibiting properties of the ZIF-67 nanoparticle layer, and the hindrance of aggressive species by the compact coating structure over the prolonged service time.
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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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Journal of Materials Chemistry A
·
2024
·
IF 10.7
Hongtao Zhou,Xuefeng Sha,Fan Zeng,Xueli Wu,Minghao Yu,Zhidan Shi,Xingang Zhang,Xianyin Song,Changzhong Jiang
Nickel–cobalt layered double hydroxide (NiCo-LDH) is a promising electrode material for supercapacitors due to its high electrochemical activity. However, it easily restacks and aggregates due to its nanosheet structure, which limits the effective utilization of redox active sites. Herein, the NiCo-LDH nanosheets derived from ZIF-67 were in situ grown on the surface of a basic copper cobalt carbonate (CoCu) urchin-like skeleton and supported by nickel foam (CoCu@NiCo-LDH). The well-designed three-dimensional (3D) hierarchical nanostructure not only effectively prevents the aggregation of NiCo-LDH nanosheets, but also provides a rapid charge transport channel, which facilitates ion diffusion and electron transport, therefore enhancing the utilization of NiCo-LDH redox active sites to a greater extent. Besides, the synergistic interactions between NiCo-LDH nanosheets and CoCu nanoneedles further enrich the redox reactions and increase the electrical conductivity and reaction kinetics of the electrode at the same time. As a result, the CoCu@NiCo-LDH electrode exhibits outstanding electrochemical performance with an ultrahigh mass loading of 14 mg cm−2, including excellent specific capacitance (18.71 F cm−2 or 1346 F g−1 at 3 mA cm−2) and distinguished rate capability of 87.3% from 3 mA cm−2 to 50 mA cm−2. When the CoCu@NiCo-LDH electrode was assembled with active carbon (AC) to form an asymmetric supercapacitor (ASC), the CoCu@NiCo-LDH//AC ASCs display outstanding energy density (1.98 mW h cm−2) and power density (97.5 mW cm−2) with excellent cycling stability (86.0% initial capacitance after 5000 cycles), and could keep an LED light bulb working for 90 min after only charging for 60 s. This work provides an effective strategy for the design and application of layered double hydroxide based pseudocapacitors.
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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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