JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Cheng Zhou,Lina Wang,Junting Sun,Hongbo Wu,Jian Zhang,Zhong Li
Enhancing oxygen reduction reaction (ORR) efficiency relies heavily on designing non-noble metal single-atom catalysts (SACs) with high-density and high-activity sites. For efficient ORR, Fe single atoms are precisely regulated and embedded into porous concave carbon derived from ZIF-8 in this work. ORR performance is significantly improved by the catalyst's concave design and microporous features, which optimize mass transfer and expose more active sites. Furthermore, the high-density, high-activity, and high-spin Fe (III) sites inside the material help to explain the increased intrinsic activity of the catalyst. Due to its unique carrier structure and iron site coordination, this catalyst exhibits outstanding ORR activity in a 0.1 M KOH solution. Additionally, zinc-air batteries constructed with this catalyst display a maximum peak power density of 151 mW cm −2 and a high specific capacity of 818 mAh g Zn −1 , outperforming Pt/C-based systems. This study presents a method for precursor treatment to efficiently and conveniently synthesize microporous carbon-based ORR SACs, aiming to advance ORR catalyst design.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Yueming Xin,Haiyan Xu,Yang He,Dandan Chen,Dongcai Li,Aiguo Wang,Daosheng Sun
The regular channels and pores of metal–organic frameworks facilitate Li diffusion and insertion, reduction of polarization, and stabilization of electrolyte–electrode interfaces in lithium-ion batteries. In this paper, a thin layer of zeolitic imidazolate framework-8 (ZIF-8) with a thickness of about 2–4 nm was decorated on the surface of V2O5 by a one-step wet chemical method at room temperature. Various techniques were used to characterize the sample, including X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy coupled with energy-dispersive X-ray analysis, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller analysis, and Fourier-transform infrared spectroscopy. Cyclic voltammetry, electrochemical impedance spectroscopy, and hybrid pulse power characteristic and galvanostatic intermittent titration techniques were also used to test the electrochemical performance. The electrochemical test results showed that the capacity of V2O5@ZIF-8 was 14 and 58% higher than that of V2O5 at 0.3 and 3 C, respectively, and the capacity retention of V2O5@ZIF-8 still reached 81% after 100 cycles at 0.3 C, which means better structural stability and excellent rate performance of V2O5@ZIF-8. High-speed ion channels of V2O5@ZIF-8 led to smaller polarization. The overpotential of oxidation–reduction from V2O5@ZIF-8 reduced the maximum by more than 90%. The intervention of the porous coating prevented the erosion of V2O5 by the electrolyte and maintained the structure stability. This work aimed to improve the overall electrochemical performance of lithium-ion batteries and provided guidance for future research.
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Parviz Sukhrobov,Sodik Numonov,Xamxikamar Mamat,Yongtao Li,Thomas Wågberg,Guangzhi Hu
The present study demonstrated a highly sensitive non-enzymatic glucose biosensor in real blood samples based on simple evaluated nickel deposited on N-doped porous carbon modified glassy carbon electrode (Ni/NPC/GCE) by applying electrochemical deposition method. The prepared material initially were characterized by cyclic voltammetry, the morphology structure of the as-prepared samples was observed by SEM, and composition, crystals structure of Ni/NPC were identified by SEM mapping and EDS tests. The Ni/NPC/GCE compared with NPC/GCE and NiNPs/GCE performed the best electrocatalytic behavior towards oxidation of glucose in 0.1 M KOH medium. By applied potential of +0.6 V Ni/NPC/GCE showed very high sensitivity of 3753.78 μAmM -1 cm -2 in linear range of 1-7940 μM with the correlation coefficient of R 2 =0.995. The linear ranges get views above the concentration up to 7940 μM with the detection limit of 0.3 μM (S/N=3). Amperometric time responses of prepared electrode towards different glucose concentrations are 0.8-1.3s. Finally, several positive characteristics such as very high sensitivity, weak working potential, nice anti-interference properties, long stability, good selectivity, and comparison with some other non-enzymatic sensors Ni/NPC/GCE executed high sensitivity, low detection limit and wide linear range to glucose sensing, thus the selected electrode is supplying for future glucose level determination design.
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 23
·期 44
·10690-10697
·
IF 5.317
Yue Yu,Li Gao,Xianchun Liu,Yuanhong Wang,Shuangxi Xing
Graphical In the frame : Incorporating CeO 2 nanoparticles in zeolitic imidazolate framework-8 (ZIF-8) followed by high-temperature pyrolysis generated CeO 2 @N-doped carbon materials (see figure), which showed excellent activity in the oxygen reduction reaction, high tolerance to methanol crossover, and high stability. Incorporation of CeO 2 nanoparticles into the cavity of zeolitic imidazolate framework-8 (ZIF-8) was followed by high-temperature pyrolysis to generate CeO 2 @N-doped carbon materials. Introduction of the CeO 2 nanoparticles greatly enhanced the catalytic activity of the ZIF-8-derived carbon materials in the oxygen reduction reaction (ORR) owing to the presence of Ce 3+ and oxygen vacancies with high content of chemisorbed oxygen in CeO 2 and the well-maintained skeleton of the original ZIF-8 with uniform mesoporous structure. The material treated at 900 °C (CeO 2 @N-C-900) showed excellent ORR catalytic activity in both acidic and alkaline electrolyte. The ORR onset and half-wave potentials of CeO 2 @N-C-900 were 1.003 and 0.908 V versus RHE, respectively, in 0.1 m KOH aqueous solution, which are comparable to those of Pt/C catalysts. Furthermore, it exhibited much better stability and methanol crossover tolerance than Pt/C, indicative of its good potential for applications in energy conversion.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Qi Kang,Xilei Zhu,Xiaolong Ma,Lingqiang Kong,Weiting Xu,Dazhong Shen
In this work, the response of an electrodeless quartz crystal microbalance (EL-QCM) in gaseous phase was investigated by an impedance analysis method. The influence of the gap size, area, position and shape of the electrodes on the resonant and equivalent circuit parameters of the EL-QCM was analyzed and discussed in a modified Butterworth–Van Dyke model. Compared with a conventional QCM, the intensity of resonant peak in EL-QCM is reduced remarkably. An EL-QCM has a quality factor in the order of 10 5 even at an air gap of 1 cm, ensuring an excellent frequency stability of this type of sensor. The excitation electrode can be mounted beside of the center of the quartz disc or outside the detection cell if needed, which offers the convenience in combination with mass and optical measurements. As an example of applications, two EL-QCM sensors in a parallel combination were used to monitor the adsorption processes of iodine vapor on quartz surface and zeolitic-imidazolate framework-8 (ZIF-8) film. The transfer process of iodine between two ZIF-8 films was investigated by the series combination of two EL-QCM sensors.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Menglu Wang,Bolong Liang,Shumin Lin,Zhe Zhao,Hongbin He,Xiliang Li,Shu-xuan Liang
The magnetic Fe 3 O 4 @ZIF-8 with high adsorption properties and easy separation were embedded in BiOX (X = Cl, Br, I) to synthesize Fe 3 O 4 @ZIF-8@BiOX using a simple one-pot solvothermal strategy. The crystal structure, surface morphology, photoelectric properties, thermal stability and magnetic response of the three materials were compared and analyzed, and the effect on the removal of OTC and Cr(VI) from single and coexisting systems by adsorption-photocatalysis is discussed. The results show Fe 3 O 4 @ZIF-8@BiOI has the highest separation efficiency of photogenerated carriers upon photoexcitation and stronger light absorption capacity, and exhibits better adsorption-photocatalytic activity than the other two materials in the photocatalytic reduction of Cr(VI) (68 % and 65 % removal for single and coexisting systems) and degradation of OTC (86 % and 59 % removal for single and coexisting systems). It is noteworthy that in the coexistence of Cr(VI) and OTC, a slight decrease of removal occurred, which could be due to a competitive effect between two pollutants being greater than the synergistic effect. ∙O 2 - is the main active substances in the adsorption-photocatalysis process. Finally, this work demonstrates the excellent adsorption and photocatalytic ability of Fe 3 O 4 @ZIF-8@BiOI for the simultaneous removal of Cr(VI) and OTC, which has great potential for practical wastewater treatment.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Dongsheng Fu,Yuanzheng Ding,Ruijie Guo,Jie Zhang,Huifang Wang,Baolong Niu,Hong Yan
ZIF-8, a subclass of metal organic frameworks (MOFs), was employed as the CuO carriers because of its high surface areas and good dispersibility. A novel antibacterial agent CuO@ZIF-8 was synthesized by environmentally-friendly direct calcination strategy, and introduced into the composite double-layer films for packing materials. The double-layer films were prepared via solution casting method with polylactic acid (PLA) and polyvinyl alcohol (PVA)-quaternary ammonium chitosan as the matrix of outer layer and inner layer, respectively; and CuO@ZIF-8 nanoparticles were introduced into the PVA-quaternary ammonium chitosan layer. The double-layer films exhibited superior antibacterial activity resulted from the uniform dispersion of CuO by ZIF-8 carriers. The elongation at break was enhanced and up to 17.13%, about 2.4-fold that of PLA films. Meanwhile, the films provided low water vapor permeability and strong UV-barrier ability which were attributed to the lay-by-layer casting, CuO@ZIF-8 doping and TiO 2 addition. Cherry tomato preservation experiment revealed that the composite films retarded the growth of harmful microorganisms on the fruit surface. MTT assay confirmed the cytocompatibility of the films. The easily fabricated double-layer films presented potential possibility in the field of biodegradable food packaging.
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 6
·e70227
·
IF 0
Safdar Ali Amur,Quratulain Khuhro,Najaf Ali Soomro,Muhammad Tariq,Hao Liang,Khalid Hussain Thebo,Mohsin Kazi
This study reports a green one-pot synthesis of glabridin-loaded Zeolitic Imidazolate Framework-8 (Glab@ZIF-8) drug delivery system (DDS) with exceptional drug loading encapsulation (DLE) of ≈ 98.7% and drug loading capacity (DLC) of 32%, surpassing values reported in previous ZIF-8-based DDS. Characterizations using Fourier-transform infrared (FTIR), UV–Visible spectroscopy, dynamic light scattering (DLS), and X-ray diffraction (XRD) confirmed successful encapsulation of Glab within ZIF-8 while preserving its crystallinity. Glab@ZIF-8 exhibited a hexagonal morphology with increased particle size (138.6 ± 5.4 nm) and a higher zeta potential (+41.9 mV), suggesting enhanced colloidal stability and efficient drug entrapment. Thermogravimetric analysis (TGA) demonstrated a total of 32.1% decomposition of Glab@ZIF-8 up to 644 °C. Antibacterial assays revealed that Glab@ZIF-8 exhibited superior activity against Staphylococcus aureus (inhibition zone: 26.2 ± 0.3 mm) and Escherichia coli (23.3 ± 0.2), comparable to that of ampicillin. The minimum inhibitory concentration (MIC) was determined to be 32.5 μg/100 μL. Furthermore, the time-kill studies confirmed a dose- and time-dependent antibacterial effects of Glab@ZIF-8. In vitro drug release studies showed strong pH- and temperature-responsive behavior, with a cumulative release of 93.7% ± 2.4% release at pH 5 (at 37°C) over 72 h. The Glab@ZIF-8 system thus combines high drug loading efficiency, excellent antibacterial activity, and tuneable release characteristics, highlighting its potential as a promising DDS for combating drug-resistant infections.
✓ 已验证
产品关联
DOI
Catalysis Science & Technology
·
2025
·
IF 4.2
Bin Guan,Junyan Chen,Lei Zhu,Zhongqi Zhuang,Xuehan Hu,Chenyu Zhu,Sikai Zhao,Kaiyou Shu,Hongtao Dang,Junjie Gao,Luyang Zhang,Tiankui Zhu,Wenbo Zeng,Minfan Qian,Zhangtong Li,Yang Lu,Shuai Chen,Zhen Huang
Herein, a detailed study of ZIF-8 CO2 photo-reduction catalysts was carried out, focusing on the characterization of the physicochemical properties of the materials, the photo-catalytic performance and the reaction mechanism. Through the systematic characterization of the ZIF-8 catalyst samples, the differences in the crystal structure, morphological features, specific surface area and optical properties of the materials were investigated. In addition, the catalytic mechanism of the catalysts was investigated in detail by in situ DRIFTS and DFT calculations, and the following conclusions were obtained: among the ZIF-8 catalysts prepared with different ratios of metal centers and ligand precursors, ZIF-8 (8-1) has a more obvious crystalline structure, stronger photoelectron transfer ability (τavg = 2.47 ns), and larger specific surface area (1180.33 m2 g−1), thus possessing the optimal catalytic activity, with a CO generation rate of 1.14 μmol g−1 h−1 and a CH4 generation rate of 0.62 μmol g−1 h−1, and the selectivity of CH4 was 35.28%. The band gap width of the material can be controlled by modulating the content of Zn metal ion centers to promote the photogenerated charge transfer during CO2 adsorption reduction, which corresponds to the enhancement of catalyst activity. The deep-rooted mechanism of CO2 catalytic reduction was revealed, and *COOH and *CHO as the key rapid-control steps of the CO2 catalytic reduction reaction; the energy barrier magnitude of the former (1.56 eV) controlled the reaction product yields, while the energy barrier magnitude of the latter (1.06 eV) was the key to regulate the product selectivity.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF IMMUNOLOGY
·
2025
·
IF 3.4
Huang Saiping,Wu Guoyuan,Xu Tianfu,Lin Dong,Zhan Zhijian
This study investigates the diagnostic potential of matrix metalloproteinase-9 (MMP-9), IL-8, and myeloperoxidase (MPO) in bronchoalveolar lavage fluid (BALF) as combined biomarkers for post-infectious bronchiolitis obliterans (PIBO) in children. BALF samples from children with PIBO were analyzed using ELISA to quantify MMP-9, IL-8, and MPO levels. Receiver operating characteristic (ROC) curves were used to assess their diagnostic values, while Pearson correlation analysis examined their associations with lung function and inflammation markers. A PIBO mouse model was established via nebulized nitric acid inhalation, and targeted inhibition of MMP-9, IL-8, and MPO using small interfering RNAs (siRNAs) was performed given via intratracheal administration. The effects on airway inflammation and pathological lung changes were evaluated. Bioinformatics analysis identified upstream microRNAs (miRNAs) regulating MMP-9, IL-8, and MPO, which were validated using dual-luciferase assay and Western blotting. Results revealed significant upregulation of MMP-9, IL-8, and MPO in the BALF of children with PIBO. Combined detection of these biomarkers demonstrated high diagnostic accuracy. MMP-9, IL-8, and MPO levels in BALF were negatively correlated with lung function indicators but positively correlated with inflammatory factors. Targeted inhibition of these molecules reduced airway hyperresponsiveness and inflammation in PIBO mice. miR-766-3p was downregulated in the lung tissues of PIBO mice and in the BALF of affected children, showing a negative correlation with MMP-9, IL-8, and MPO. Functional assays confirmed that miR-766-3p directly targeted MMP-9, IL-8, and MPO. In conclusion, MMP-9, IL-8, and MPO serve as reliable combined biomarkers for PIBO diagnosis and may aid in early clinical identification. miR-766-3p is an upstream miRNA for MMP-9, IL-8, and MPO.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomedical Materials
·
2025
·Vol. 20
·期 3
·035013
·
IF 3.7
Meiting Lin,Kunyuan Tang,Wendi Zheng,Shijie Zheng,Ke Hu
Curcumin is a natural polyphenol extracted from plants that can interact with various molecular targets, including antioxidant, antibacterial, anticancer, and anti-aging activities. Due to its variety of pharmacological activities and large margin pf safety, curcumin has been used in the prevention and treatment of various diseases, such as Alzheimer's, heart, and rheumatic immune diseases. To develop curcumin eye drops that can be used as antioxidant and antibacterial agents after phacoemulsification, we have designed a nano-based drug delivery system to improve curcumin bioavailability and duration of action. We successfully prepared zeolitic imidazolate framework-8 (ZIF-8) coated with chitosan–liposome (Cur@ZIF-8/CS-Lip) for curcumin delivery. It can release curcumin for over 20 h in vitro and exhibits excellent biosafety, antioxidant, and antibacterial activities. Therefore, we hypothesized that Cur@ZIF-8/CS-Lip could reduce the incidence of oxidative stress and infection after cataract surgery.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Huijie Lv,Haohan Yu,Huayin Zhang,Feng Zhu,Ziyi Wang,Qian Xu,Wenliang Ji
ZIF-8 and polydopamine (PDA) double -modified melamine foam (MF), namely ZIF-8@PDA MF was fabricated using a new in-situ growth method for the co-removal of multiple organophosphorus flame retardants (OPFRs) from environmental water. The resulting ZIF-8@PDA MF exhibited a porous, three-dimensional (3D) cross-linked network in which ZIF-8 evenly distributed on MF via the PDA’s adhesive properties, leading to a 17-fold increase in surface area (from 1.357 to 22.964 m 2 /g) to facilitate mass transfer and target binding. Through experimental confirmation, the mechanisms of hydrogen bonding, π-π, electrostatic and hydrophobic adsorption enable the effective removal of 11 types of OPFRs including aryl-, alkyl- and Cl-OPFRs. Compared to the adsorbents reported previously, ZIF-8@PDA MF achieved higher removal efficiencies (53.8%–99.7%), particularly a 30% improvement for highly polar TEP and TCEP. The adsorption behavior of OPFRs by ZIF-8@PDA MF followed a spontaneous, endothermic process, conforming to the pseudo-second-order model and Langmuir model. The adsorption equilibrium could be reached within one hour, 2-48 times faster than most reported studies (2-48 h). In addition, ZIF-8@PDA MF was demonstrated to efficiently remove multiple OPFRs from raw environmental water and the reusability reached up to four cycles without requiring secondary separation, highlighting its practical applicability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）