International Journal of Nanomedicine
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2024
·
IF 6.6
Yutong Zheng,Xiaoyi Cai,Gui Chen,Dexuan Xiang,Wei Shi,Jianliang Shen,Bailin Xiang
Purpose: Recently, Single-atom-loaded carbon-based material is a new environmentally friendly and stable photothermal antibacterial nanomaterial. It is still a great challenge to achieve single-atom loading on carbon materials.Materials and Methods: Herein, We doped single-atom Ag into ZIF-8-derived porous carbon to obtain Ag-doped ZIF-8-derived porous carbon(AgSA-ZDPC). The as-prepared samples were characterized by XRD, XPS, FESEM, EDX, TEM, and HAADF-STEM which confirmed that the single-atom Ag successfully doped into the porous carbon. Further, the photothermal properties and antimicrobial activity of AgSA-ZDPC have been tested.Results: The results showed that the temperature increased by 30 °C after near-infrared light irradiation(1 W/cm2) for 5 min which was better than ZIF-8-derived porous carbon(ZDPC). It also exhibits excellent photothermal stability after the laser was switched on and off 5 times. When the AgSA-ZDPC concentration was greater than 50 μg/mL and the near-infrared irradiation was performed for 5 min, the growth inhibition of S. aureus and E. coli was almost 100%.Conclusion: This work provides a simple method for the preparation of single-atom Ag-doped microporous carbon which has potential antibacterial application.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Meng-Nan Liu,Ting Chen,Fang Yin,Wei Zhi Song,Lin-Xin Wu,Jun Zhang,Seeram Ramakrishna,Yun-Ze Long
For chronic wounds, frequent replacement of bandages not only increases the likelihood of secondary damage and the risk of cross infection but also wastes medication. Therefore, in situ real-time monitoring of the concentrations of residual drugs in bandages is crucial. Here, we propose a novel strategy that combines a triboelectric nanogenerator (TENG) with medical bandages to develop a smart bandage based on zeolite imidazolate framework TENG. During the process of wound healing, the electrical output of TENG changes with the continuous release of drugs. Based on the correlation between the electrical signal of TENG and drug concentration, the concentration of residual drugs in the bandage can be monitored in real-time in situ, guiding medical staff to replace the bandage at the most appropriate time. The smart bandage based on TENG provides a new strategy for in situ real-time monitoring of drug concentration and also provides an ideal and feasible solution for the field of biomedical drug sensing.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 1
·e70068
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IF 3.4
Hailong Zhang,Ruimeng Li,Haishui Xu,Ling Quan,Chengyu Zhan,Peng Han,Kehan Xu,Yuping Tong
The accumulation of copper ions in the environment can devastate the ecological systems and threaten the health of organisms. Consequently, the development of effective adsorbents to extract Cu 2+ from aqueous solutions is urgently needed. Here, the Zeolitic Imidazolate Framework-8 (ZIF-8)/polyacrylonitrile (PAN) nanocomposite fibers were synthesized by electrospinning and further characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). ZIF-8 powders were uniformly distributed on the surface of the nanocomposite fibers, and amide CO NH bonds were formed between the NH 2 groups of ZIF-8 and the CO groups of PAN. The ZIF-8/PAN nanocomposite fibers demonstrated an exceptional Cu 2+ adsorption capacity of 275.7 mg g −1 at pH = 4.0. The adsorption process adhered to the pseudo-second-order kinetics and the Langmuir isotherm model. The adsorption mechanism, as conformed by FTIR and X-ray photoelectron spectroscopy (XPS) analysis, involves the coordination of the NH 2 and CO groups with Cu 2+ and the ion exchange processes between Cu 2+ and Zn 2+ for the nanocomposite fibers. This study provides a novel approach for the removal of Cu 2+ from aqueous solutions and addresses the challenge of recovering powder materials in wastewater treatment.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jinhao Gao,Hanwen Wang,Zhiyuan Gao,He Gui,Yanxin Wang,Jianguo Tang,Linjun Huang
The flexibility, wide response range, and ultra-high sensitivity of flexible sensors make them suitable forwearable technology, automated manufacturing, and robotics. The development of raw materials for flexible sensors and the design of their source layer structures can address a range of issues. In this article, we aim to develop flexible sensors for wearable technology by preparing MXene/PVDF@ZIF-8 multilayer nanofiber membranes through electrospinning technology. By incorporating ZIF-8 particles into PVDF fibers through in situ electrospinning technology, flexible sensors with a rough structure were obtained. We similarly employed vacuum filtration technology to introduce MXene nanosheets into PVDF@ZIF-8 nanofibers, further constructing a conductive network with a multidimensional structure in the vertical direction of the film. The performance of the prepared MXene/PVDF@ZIF-8 composite fiber membrane pressure sensor was tested, revealing its wide working range (0–125 kPa), high sensitivity (25.8–77.9 kPa -1 ), load/unload Time (20 ms/30 ms), and strong mechanical stability. Various human movements and lying postures were simulated, confirming that the sensor can effectively provide feedback on external pressure applied to the skin. This also demonstrates the broad application prospects of the flexible sensor in the field of flexible wearables.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Rui Gou,Yong Li,Qilong Chen,Sha Wang,Dan Sun,Changhua Li,Xianmin Gong,Yi He
Metal corrosion causes a lot of waste of resources, and the protection of metals from corrosion is becoming increasingly important. In this study, zeolite-imidazole (ZIF-67) was grown on the surface of Co-MOF for the first time by a one-step (complexation) method. 2-Mercaptobenzimidazole (MBI) was then loaded into the inner cavity of ZIF-67, resulting in the formation of a new composite material, Co-MOF@ZIF-67@MBI. The modified Co-MOF exhibits excellent interfacial compatibility with the water-based epoxy resin, and the Co-MOF@ZIF-67@MBI composite coating demonstrates robust anti-corrosion properties. Following a 60-day immersion period, the electrochemical experiment demonstrated that the corrosion resistance modulus of the Co-MOF@ZIF-67@MBI composite coating reached 10 8 Ω cm², indicating that the coating effectively enhanced the corrosion resistance of the coating and significantly extended the service life of the coating.
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Junlei Zheng,Haifeng Gao,Chengcheng Jin,Miaomiao Tian
A novel solid phase extraction (SPE) adsorbent, polyethylene glycol (PEG) immobilized zirconium ion-modified zeolite-imidazole framework (ZIF) molecular-imprinted polymer (ZIF@PEG@Zr@MIPs), was developed for detecting hippuric acid (HA) and 4-methylhippuric acid (4-MHA) in human urine using HPLC-UV. Zirconium ions (Zr 4+ ) anchored on the porous ZIF act as binding sites, facilitating coordination and electrostatic interaction with HA and 4-MHA carboxyl groups. Dopamine (DA) imprinting introduces additional sites, enabling π-π conjugation and hydrogen bonding with HA and 4-MHA, enhancing specific adsorption. The adsorbent, using HA as a template, demonstrated adsorption capacities of 37.98 mg g −1 for HA and 32.99 mg g −1 for 4-MHA. Imprinted factors ( IF ) were 2.68 for HA and 2.17 for 4-MHA, with a limit of detection (LOD) of 0.015 mg L −1 for HA and 0.011 mg L −1 for 4-MHA. The SPE-HPLC-UV method achieved 84.8–96.2% recovery and 0.3–2.2% relative standard deviation (RSD), illustrating its potential in health monitoring and environmental safety.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Wenjing Yang,Xujie Zhang,Chenhang Ding,Wurikaixi Aiyiti,Cijun Shuai
Bacterial infections especially bacterial biofilm infections have always been a major obstacle to the reconstruction of deep skin defects. Herein, a photothermal activated multifunctional nanocatalyst (Ni@ZIF-C) is synthesized by doping Ni into zeolitic imidazolate framework-67 (ZIF-67) and carbonizing, following by introducing into polycaprolactone (PCL) to prepare porous scaffolds by selective laser sintering. Especially, the Ni@ZIF-C nanocatalyst endows scaffold favorable chemo/photodynamic/photothermal triple-mode antibacterial activity under near-infrared light irradiation. On the one hand, the highly conductive Ni@ZIF-C improves the separation efficiency of photogenerated electron-hole pairs to trigger reactive oxygen species (ROS) generation, achieving photodynamic sterilization. On the other hand, the superior photothermal conversion efficiency of Ni@ZIF-C in scaffold not only directly destruct bacterial biofilms by hyperthermia but also enhance its own peroxidase-like activity to induce more ROS production, and the latter is bactericidal by chemical mode. Importantly, the destruction of the biofilms enables the pre-generated ROS to kill deep bacteria, achieving a triple-mode combined or even synergistic antibacterial efficacy. Results demonstrated that the PCL/Ni@ZIF-C scaffold with triple bactericidal modalities presents stronger bactericidal ability than PCL/ZIF-67 and PCL scaffolds. Encouragingly, it remarkably destroyed S. aureus and E. coli biofilms and inhibited biofilm formation, effectively triggered massive ROS generation and ultimately eradicated the bacteria deep within the biofilms. Taken together, the scaffold exhibited tremendous potential in utilizing photothermal activated multimodal combined antibiofilm and antibacterial therapy.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Renchan Han,Xiangyu Wang,Min Jiang,Iseult Lynch,Jun Ma,Ping Ning
The sintering aggregation of carbon material (ZIF-N-C-600), as well as the tendency towards agglomeration and oxidation of zero-valent iron nanoparticles (Fe 0 ) limit their applications in advanced oxidation processes. Hence, a flower-like Fe 0 @ZIF-N-C-600 was rationally constructed by facile one-step self-assembly to ameliorate peroxydisulfate (PDS) activation. The polyhedral ZIF-N-C-600 aggregates were exfoliated into thinner porous nanosheets and Fe 0 nanoparticles were effectively dispersed and anchored onto ZIF-N-C-600. 96.7 % of metronidazole (MNZ) was eliminated by the Fe 0 @ZIF-N-C-600/PDS system, and the removal reaction rate constant k values were 2 and 2.55 times as high as Fe 0 @ZIF/PDS and Fe 0 /PDS, respectively. Fe 0 , defective sites, C=O and pyridinic N were identified as the active sites promoting PDS activation to produce ·OH, SO 4 · - , ·O 2 – and 1 O 2 for synergistic oxidative elimination of MNZ. The formation rate of ·OH was calculated to be 4.62 times higher than that of the SO 4 · - by multivariate nonlinear fitting, and the ·OH contributes up to 63.5 %. Fe 0 @ZIF-N-C-600/PDS system possesses excellent tolerance and selectivity to complicated water bodies, and the effective continuous degradation was achieved in a self-made catalytic reactor. Moreover, DFT calculations and LC-MS analysis were applied to deduce possible pathways for MNZ degradation. This work offers an effective strategy to regulate the morphology of sintered carbon materials and improve the application of metal nanoparticles in advanced oxidation processes.
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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 10
·4437-4445
·
IF 2.7
Ran Zhang,Shaohong Zhang,Junhao Lu,Ying Wu,Jinjin Zhao,Zhijuan Wang
Nanozymes have attracted much attention as a new type of artificial enzyme with great development potential in recent years. Here, a cubic Co and N co-doped porous carbon material (Co-HPNC@NC) was synthesized through the calcination of PDA-modified bimetallic Co–Zn ZIFs. Co-HPNC@NC exhibits exceptionally high oxidase-mimicking activity and effectively oxidizes the colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue-colored oxidized TMB (oxTMB) without H2O2. However, the formation of oxTMB was inhibited by the addition of L-cysteine (L-Cys). Therefore, the blue color faded to colorless, causing a notable decrease in absorbance. Furthermore, Co-HPNC@NC showed good selectivity and anti-interference ability toward the detection of L-Cys. As a result, a sensitive and efficient colorimetric method has been developed to determine L-Cys with a low detection limit of 0.17 μM (3σ). It is believed that this colorimetric method for the detection of L-Cys based on Co-HPNC@NC will show potential applications in biosensors and medical diagnosis.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 9
·1-11
·
IF 5.3
Lu Juan,Guo Yanjia,Shan Xiangyu,Song Yujia,Li Ruidan,Tian Li,Li Xuwen
A solid-state electrochemiluminescence (ECL) sensor was fabricated by immobilizing luminol, a classical luminescent reagent, on a Zn-Co-ZIF carbon fiber-modified electrode for the rapid and sensitive detection of procymidone (PCM) in vegetable samples. The sensor was created by sequentially modifying the glassy carbon electrode with Zn-Co-ZIF carbon fiber (Zn-Co-ZIF CNFs), Pt@Au NPs, and luminol. Zn-Co-ZIF CNFs, prepared through electrospinning and high-temperature pyrolysis, possessed a large specific surface area and porosity, making it suitable as carrier and electron transfer accelerator in the system. Pt@Au NPs demonstrated excellent catalytic activity, effectively enhancing the generation of active substances. The ECL signal was significantly amplified by the combination of Zn-Co-ZIF CNFs and Pt@Au NPs, which can subsequently be diminished by procymidone. The ECL intensity decreased proportionally with the addition of procymidone, displaying a linear relationship within the concentration range 1.0 × 10 –13 to 1.0 × 10 –6 mol L −1 (R 2 = 0.993). The sensor exhibited a detection limit of 3.3 × 10 –14 mol L −1 (S/N = 3) and demonstrated outstanding reproducibility and stability, making it well-suited for the detection of procymidone in vegetable samples. Graphical Abstract
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Food Bioscience
·
2025
·
IF 5.9
Anqi Sun,Shuo Qi,Yu Li,Yiyao Wu,Yin Zhang,Zhouping Wang
Sensitive and selective determination of azlocillin (Azl) is of great significance to food safety and human health as it is recognized as the most prevalently utilized β-lactam antibiotics. Herein, we develop a highly sensitive fluorescence aptasensor selective, and sensitive, determination of Azl in food samples. Initially, the aptamer A-58 with the highest affinity(K d = 64.5 ± 7.2 nM)was obtained by means of truncation. Subsequently, a highly stable aqueous dispersed perovskite nanocrystal MAPbBr 3 @ZIF-8 was synthesized and used as a fluorescent marker in aptasensors. The aptasensor was constructed by using MAPbBr 3 @ZIF-8 as the fluorescence signal source, aptamers as the specific recognition molecules, and AuNPs as a quenching agent. This design integrates the excellent optical properties of perovskite, the fluorescence quenching ability of AuNPs and the specificity of aptamer, exhibiting great promising for trace analysis of Azl in food samples. Under the optimal experimental conditions, the linear detection range of the developed aptasensor method spans from 0.1 to 100 ng/mL, with a detection limit of 0.025 ng/mL. The developed MAPbBr 3 @ZIF-8 based aptasensor has been effectively utilized for the quantification of azlocillin in milk, demonstrating significant potential in the realm of antibiotic detection.
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JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2024
·Vol. 30
·期 4
·1039-1051
·
IF 3.8
Yujie Yang,Xiaodong Qiao,Xinpeng Fan,Shuangquan Liao,Zhenfan Sun
Zinc oxide (ZnO) is widely used as an activator in the vulcanization process of natural rubber. However, due to its poor compatibility with natural rubber, a large amount of ZnO needs to use, and the unreacted ZnO can precipitate in various ways, posing significant harm to aquatic organisms and microorganisms. Therefore, it is necessary to reduce the dosage of ZnO in order to minimize its environmental impact. In this study, we applied ZIF-8, a zinc-based metal–organic framework, as a vulcanization additive in natural rubber. and it was found that ZIF-8 could promote the rubber vulcanization reaction by adsorbing sulfur, promoting sulfur ring-opening, and providing different ligand interactions of Zn 2+ . Moreover, even at low usage levels of ZIF-8, it effectively reduces the amount of ZnO while simultaneously improving the mechanical properties of the samples. This work provides an effective method to reduce the amount of ZnO without sacrificing the rubber properties and provides a new idea for the application of ZIF-8 in rubber materials. Highlights ZIF-8 enhances properties of natural rubber composites with low ZnO dosages. Revealing the reason why ZIF-8 promotes the vulcanization of natural rubber. Investigation of the effect of ZIF-8 on the vulcanization properties of natural rubber.
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