ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Junhao Liu,Jinshi Yu,Xiaoyan Wang,Meng Cheng,Shuangqing Sun,Songqing Hu,Chunling Li,Zhikun Wang
Metal–nitrogen–carbon (M–N–C) catalysts obtained from zeolitic imidazolate frameworks (ZIFs) have great potential in the oxygen reduction reaction (ORR). Herein, based on the same three-dimensional (3D) topological structure of ZIF-67 and ZIF-8, ZIF-67 is grown on the ZIF-8 surface by the epitaxial growth method, and ZIF-8 is used as a sacrificial template to obtain a Co-embedded layered porous carbon nanocage (CoPCN) electrocatalyst. Meanwhile, the self-sacrificing template effectively improves the specific surface area of the porous structure and reduces the depletion of active sites. The CoPCN shows a high half-wave potential of 0.885 V and superior stability as well as excellent methanol resistance. Theoretical calculations demonstrate that the Co–N1–C2 sites of CoPCN effectively reduce the energy barrier of ORR. In addition, a zinc–air battery (ZAB) based on the CoPCN exhibits excellent peak power density (90 mW cm–2) and superior cycle performance. This work presents a novel idea in the design of ZIF precursor systems to synthesize efficient ORR catalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2016
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IF 3.014
Jianxin Liu,Rui Li,Yunfang Wang,Yawen Wang,Xiaochao Zhang,Caimei Fan
For detecting the active roles of ZIF-8 in composite photocatalyst , a novel Ag/AgCl/ZIF-8(50%) composite photocatalyst was designately prepared by anchoring Ag/AgCl nanoparticles on the surface of ZIF-8 with 50% content. The adsorption and photocatalytic performance of Ag/AgCl/ZIF-8(50%) were conducted by removal of Rhodamine B (RhB) from aqueous solution under dark and visible light irradiation (λ > 420 nm). The experimental results showed that the as-synthesized Ag/AgCl/ZIF-8(50%) exhibited higher photocatalytic activity than Ag/AgCl. The XRD , TEM , FTIR, DRS, VB XPS, ESR, N 2 adsorption isotherms and active species trapping experiments were used to characterize the performance of the composite photocatalyst. We found that the ZIF-8 in composite photocatalyst not only has the adsorption ability for RhB by its large specific area, but also has the ability for the formation of O 2 · − by an appropriate position of conduction band (CB). A reasonable reaction mechanism with a new perspective on the composite photocatalyst of Ag/AgCl/ZIF-8(50%) was proposed. This insight on the active roles of ZIF-8 in Ag/AgCl/ZIF-8(50%) may open a window for the use of MOF material in photocatalytic field.
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JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Jiali Tang,Viatcheslav Freger,Lu Shao,Xuezhong He
Metal-organic frameworks (MOFs)-based hybrid composite membranes are promising candidates for achieving highly efficient water purification. In this study, a facile, novel pressure-induced filtration method involving in-situ polymerization of butyl methacrylate (BMA) was proposed for sealing ZIF-8 nanoparticles on top of polyethersulfone (PES) ultrafiltration membrane support. The developed (ZIF-8+polyBMA)/PES composite membranes with thin toplayers of <1 μm present attractive water permeance (up to 31 LMH/bar) and good rejection of Congo red (99.2 %) and Methylene blue (99.1 %). The ZIF-8 particles served as direct-through channels with superior separation performance due to their high porosity and tunable pore structure, while the interstices were successfully sealed with polyBMA by in-situ polymerization, as demonstrated by SEM and dye removal experiments. It was found that the morphology of ZIF-8 transformed from a rhombic dodecahedron to two-dimensional hexagonal nanosheets during the fabrication process. We hypothesize that this surprising phenomenon is caused by the reaction of the initiators (Na 2 S 2 O 5 and K 2 S 2 O 8 ) that generate the hydroxyl and sulfate radicals attacking and transforming the Zn-MIM bond network of ZIF-8. However, insights into the structural changes need to be further investigated to understand the mechanism involved.
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Exploration
·
2024
·
IF 0
Xiaoxue Li,Wei Wang,Qiuxia Gao,Shanshan Lai,Yan Liu,Sitong Zhou,Yan Yan,Jie Zhang,Huanhuan Wang,Jiamei Wang,Yi Feng,Ronghua Yang,Jianyu Su,Bin Li,Yuhui Liao
Infected burn wounds are characterized by persistent drug-resistant bacterial infection coupled with an inflammatory response, impeding the wound-healing process. In this study, an intelligent nanoparticle system (CCM+TTD@ZIF-8 NPs) was prepared using curcumin (CCM), an aggregation-induced emission luminogens (TTD), and ZIF-8 for infection-induced wound healing. The CCM+TTD@ZIF-8 NPs showed multiple functions, including bacteria targeting, fluorescence imaging and pH response-guided photodynamic therapy (PDT), and anti-inflammatory. The positive charges of ZIF-8 NPs allowed the targeting of drug-resistant bacteria in infected wounds, thereby realizing fluorescence imaging of bacteria by emitting red fluorescence at the infected site upon blue light irradiation. The pH-responsive characteristics of the CCM+TTD@ZIF-8 NPs also enabled controllable CCM release onto the infected wound site, thereby promoting the specific accumulation of ROS at the infected site, with outstanding bactericidal efficacy against drug-resistant Staphylococcus aureus (S. aureus) and Pseudomonas aeruginosa (P. aeruginosa) strains in vitro/in vivo. Additionally, due to the excellent bactericidal effect and anti-inflammatory properties of CCM+TTD@ZIF-8 NPs combined with blue light irradiation, the regeneration of epidermal tissue, angiogenesis, and collagen deposition was achieved, accelerating the healing process of infected burn wounds. Therefore, this CCM+TTD@ZIF-8 NPs with multifunctional properties provides great potential for infected burn wound healing.
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International Journal of Electrochemical Science
·
2024
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IF 1.3
Shuai Gao,Hongkun Long,Weigang Liu,Zhi Zhang,Shengqiang Qiu,Maoyi Yi,Jie Li
Poor safety of liquid electrolytes and low ionic conductivity of solid electrolytes under room temperature are two major constraints for high energy density, long-term stability and safety of lithium-ion batteries (LIBs). In order to remedy the deficiencies, a quasi-solid electrolyte (QSE) is developed by immobilizing liquid electrolyte into the host of porous 2-Methylimidazole zinc salt (ZIF-8), and then mixing them with solid polymer electrolyte solvent of polyoxyethylene (PEO). The QSE has an ionic conductivity of 0.44 mS cm −1 at 20 °C and 2.27 mS cm −1 at 50 °C. The assembled LiFePO 4 /QSE/Li batteries exhibit excellent electrochemical performance in a wide temperature range. A reversible capacity of 129.7 mAh g −1 at 0.5 C and 20 °C and high capacity retentation of 94.7% at 0.5 C and 50 °C are achieved after 100 cycles. Especially, the LiFePO 4 /QSE/graphite pouch full cell exhibits a capacity retention of 97.7% at 0.5 C and 25 °C. These results indicate that QSE is a suitable candidate for enhancing the electrochemical performance of LIBs.
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PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Hao Yang,Yi Liu,Hao Chen,Hua Li
Epoxy resin coatings are widely used for corrosion protection due to their cost efficiency, strong chemical durability and favorable mechanical strength. Antifouling agents have also been commonly applied to epoxy coatings for further antifouling function. However, due to the lack of reliable control of continuous release of the antifouling agents, the antifouling effect and service life keeps elusive. This study used a zinc-based metal organic framework ZIF-8 as a nanocarrier to prepare a novel antifouling agent NH 2 -ZIF-8@BITEP. The antifouling agent has uniform particle size and can effectively kill E. coli and S. aureus . After blending with epoxy resin, the resulting ZB coating effectively achieves contact sterilization, especially the ZB coating containing 20wt%NH 2 -ZIF-8@BITEP shows pronounced capability of inhibiting the formation of bacterial biofilm and the adhesion of algae even after 14 days incubation. In addition, the coating shows significantly enhanced corrosion resistance due to the hindering effect of the nanoparticles in the coating. After 7 days of salt spray testing, the ZB coating exhibits the least corrosion occurrence and no decrease in |Z| during EIS testing. The results would give insight into further understanding and potential antifouling and anti-corrosion applications of the newly synthesized antifoulant.
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ANALYTICA CHIMICA ACTA
·
2014
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IF 4.517
Li Qiao,Ning Gan,Jiayu Wang,Huiju Gao,Futao Hu,Hongfei Wang,Tianhua Li
A novel 8-electrode array as stir bar was designed for selective extraction of trace level exogenous estrogens from food samples, followed by liquid desorption and HPLC-photodiode array detection. The array consisted of 8 screen-printed electrodes and each electrode was modified with Fe 3 O 4 @meso-/macroporous TiO 2 microspheres and molecularly imprinted film (m-TiMIF). The fabrication of the imprinted film coating was very simple without organic solvents and chemical grafting. Both bisphenol A (BPA) and diethylstilbestrol (DES) were employed as templates in m-TiMIF fabrication in order to enrich both targets simultaneously. Interestingly, the imprinted stir bar array showed higher extraction capacity and selectivity for BPA and DES than the non-imprinted counterpart. Meanwhile, it exhibited fast adsorption and desorption kinetics due to increased mass transport in the ultra-thin film. Importantly, the m-TiMIF coating was robust enough for at least 20 uses without obvious alteration in extraction performance. The main parameters affecting the extraction efficiency, including stir speeding, sample pH, ionic strength, extraction time, desorption solvent and time, were optimized. Under optimal experimental conditions, the limits of detection (S/N = 3) of the developed method were 0.28 and 0.47 μg L −1 for BPA and DES respectively, with enrichment factors of 32.6 and 52.8-fold. The linear ranges were 3.0–1500 μg L −1 and 4.0–1500 μg L −1 for BPA and DES, respectively. The m-TiMIF-coating conferred better recovery and selectivity, compared with the commercial stir bar coating. The new method was successfully applied to assess BPA and DES in pork and chicken samples with satisfactory recovery.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Yan Li,Jing-Wen Liu,Xiao-Xue Lian,Shu-Mei Yang
Triethylamine is an organic amine compound with strong irritancy and toxicity that threatens ecological balance and human health, making accurate detection crucial. However, achieving high sensitivity and selective detection of TEA in ppb level is challenging. Herein, we have successfully prepared an Au-ZnO/ZIF-8 via an interface oxidation strategy followed by Au nanoparticles loading. The synthesis process involves three key steps: firstly, ZnO nanofibers are prepared by electrospinning, followed by in-situ coordination growth to form a ZIF-8 layer on the ZnO surface; subsequently, Au nanoparticles are decorated onto the ZnO/ZIF-8 surface through an impregnation-reduction method; finally, the composites are calcined in a tube furnace to generate oxidation layers while retaining the intrinsic properties of ZIF-8. Sensing tests toward 100 ppm TEA reveal that the Au-ZnO/ZIF-8 sensor exhibits a response of 1012.5 with a low detection limit of 2.78 ppb at 235 °C. This performance is 13.9-fold higher than that of ZnO/ZIF-8 (72.9 at 303 °C) and 30.5-fold higher than that of pristine ZnO (33.1 at 328 °C). Furthermore, the sensor demonstrates high selectivity for TEA, short response times (7 s), as well as excellent repeatability and stability. It indicates that the Au-ZnO/ZIF-8 sensor holds great potential for practical TEA detection, thereby providing a feasible strategy to improve the gas detection capabilities of MOF-based sensors.
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Advanced Healthcare Materials
·
2019
·Vol. 8
·期 13
·1900174
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IF 6.27
Haishi Qiao,Jing Jia,Haowen Shen,Sibo Zhao,Enping Chen,Wei Chen,Bin Di,Chi Hu
Nanosystems responsive to tumor-specific enzymes are considered as a highly attractive approach to intracellular drug release for targeted cancer therapy. Mesoporous silica nanoparticles are capped with tryptophan-mediated cucurbit[8]uril complex with Fe 3 O 4 to minimize the premature drug leakage while being able to deliver the payload on demand at the target tissue. The supramolecular interaction between tryptophan and cucurbit[8]uril is disrupted in the presence of indoleamine 2,3-dioxygenase 1 (IDO1) enzyme (abundant in the tumor intracellular microenvironment), which catalyzes the metabolism of tryptophan into N -formylkynurenine, resulting in the disassembly of the “gate-keeper” of the nanocarriers and intracellular release of therapeutics exclusively in tumor cells. The drug release from the nanocarrier with high selectivity to overexpressed IDO1 enzyme induces significant cytotoxicity against HepG2 cells in vitro, as well as the superior antitumor effects in vivo. This robust supramolecular nanosystem with sophisticated structure and property provides a promising platform for intracellular drug release targeting the intrinsic microenvironmental enzyme inside the tumor cells.
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PubMed
高影响因子
POLYMER COMPOSITES
·
2025
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IF 4.7
Chunying Min,Yijie Yang,Hongyu Liang,Amna Siddique,Zhiwei Xu
Carbon fiber–reinforced polymers (CFRPs) inherently experience stress concentration due to the significant modulus differences between carbon fiber (CF) and the resin. In this work, the zinc oxide nanorods synthesized on the surface of CF cloth were employed as the zinc source to construct a zinc oxide@zeolitic imidazolate framework-8 (ZnO@ZIF-8) interfacial transition layer, which effectively narrowed the modulus gap between CF and poly(hexahydrotriazine) cross-linked polyimide (PI-PHT), thereby facilitating stress transfer and frictional heat dissipation. Compared to unmodified composite, CF@ZnO@ZIF-8/PI-PHT exhibited a 45% increase in tensile strength and a 54% reduction in wear rate. Furthermore, closed-loop recycling of CF@ZnO@ZIF-8 and its composite was achieved while retaining superior mechanical and tribological performance. This work provides a new strategy for developing environmentally sustainable, recyclable, and wear-resistant CFRPs. Highlights Modulus gradient design effectively reduced stress concentration. Interface was reinforced by mechanical interlocking and chemical bonding. Interphase significantly enhanced the tribological properties of composites. Closed-loop recycling was achieved through the degradability of resin. Recycled composites still maintain high performance.
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ChemistrySelect
·
2025
·Vol. 10
·期 21
·e06152
·
IF 2
Shuai Wang,BingXi Song,Ze Su,Yijie Cai,Long Liu,Chang Su,Yanqiang Zhang
Graphical A new ionic liquid plasticizer [NTAZ][NTf 2 ] was synthesized. Compared with the traditional plasticizer DOA, [NTAZ][NTf 2 ] can significantly improve the energy of the propellant formulation. Energetic plasticizer is an important means to improve the energy performance of solid propellants, but there is no suitable energetic plasticizer for HTPB/TDI system. In this work, a nitrate-functionalized ionic liquid plasticizer of 1-Methyl-4-(8-(Nitrooxy)octyl)-1,2,4-triazolium bis((trifluoromethyl)sulfonyl)imide ([NTAZ][NTf 2 ]) was synthesized, and the energy was increased by the combination of nitrate functional group and 1,2,4-triazole cation. The hydrogen bond between the anion and the cation and HTPB achieves a good plasticizing effect. When 6% [NTAZ][NTf 2 ] was added to HTPB/TDI system, the glass transition temperature decreased from −63.41 °C to −64.84 °C, the tensile strength increased from 0.52 MPa to 0.79 MPa, and the storage modulus increased from 64.02 MPa to 110.32 MPa. When 4% DOA is replaced by the same amount of [NTAZ][NTf 2 ] in the HTPB formulation system, the specific impulse is increased from 261.0 s to 271.4 s. This study will guide the design and application of new energetic solid propellant plasticisers, both theoretically and experimentally.
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Nano Today
·
2025
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IF 10.9
Majid Sharifi,Majid Salehi,Somayeh Ebrahimi-Barough,Mohammad Kamalabadi-Farahani
Neuroma formation following the repair of nerve injuries exceeding 0.9 cm in length severely impedes functional recovery. To overcome this challenge, we engineered magnetically responsive core-shell nanoparticles (MnFe 2 O 4 @ZIF-8@Retinoic acid, MFZR; 90–360 nm) to guide regeneration within a decellularized umbilical cord artery (DUCA) conduit. We investigated the synergistic effect of MFZR under an external magnetic field (MF) on Schwann cell behavior in vitro and on sciatic nerve repair in a rat model. Under MF exposure, MFZR significantly enhanced Schwann cell migration, alignment, and elongation on DUCA conduits. In-vivo , the MFZR+MF combination potently promoted functional recovery, as measured by the sciatic functional index, muscle compound action potential, and nerve conduction velocity, without inducing DUCA-related inflammation. Histological analysis demonstrated robust regeneration, characterized by increased axon diameter, an improved G-ratio, and elevated expression of S100 and NF-200. This regeneration was facilitated by a healing-promoting M2 macrophage polarization at the injury site. Critically, the strategy exhibited no systemic toxicity. These findings establish that magnetically guided MFZR effectively prevents neuroma in the DUCA conduits, orchestrates a pro-regenerative microenvironment, and achieves significant functional recovery, offering a promising translatable strategy for nerve repair.
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