INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
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IF 8.5
Hong Fang,Weizhong Yuan
Treatment of diabetic wounds at different stages remains a pressing challenge. By simulating the complex structure of natural skin, a multifunctional nanofibrous membrane/self-healing hydrogel double-layer nanocomposite dressing loading nanozyme was prepared to accelerate diabetic wound healing. The upper layer was prepared from a modified self-synthesized polyurethane (APU) nanofibrous membrane, and the bottom layer was made of an injectable self-healing hydrogel loaded with nanozyme based on oxidized dextran (ODex) and carboxymethyl chitosan (CMC). The APU nanofibrous membrane on the top can maintain a breathable and sterile environment, support the dressing, and promote cell proliferation and migration. Glucose oxidase (GOx) and l -arginine (L-Arg) at the bottom were co-doped with zinc-ZIF nanoparticles (GLZ) and acted as nanozymes for enzyme catalysis. Under the catalytic action of GOx, the high blood sugar in the wound was consumed, the pH of the microenvironment was reduced, and Zn 2+ was released, achieving an effective antibacterial effect. L-Arg was catalyzed by H 2 O 2 to generate NO in a lower pH environment, accelerating angiogenesis. Overall, the double-layer composite dressings loaded with ZIF-nanozyme exhibited comprehensive blood sugar regulation capabilities and antibacterial activity, which could promote angiogenesis and cell proliferation, and effectively treat chronic diabetic wounds.
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Anqi Li,Xiaoyu Qian,Mengyan Han,Zhichun Li,Xiaobo He,Guofeng Wang
Electrochemical catalytic water splitting is considered as a promising technique for green hydrogen production, and highly active catalysts toward cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER) are required, especially bifunctional ones. In this work, the bifunctional catalysts with Co-CoO x @N, O co-doped carbon (NOC) hybrid nanostructures have been prepared via pyrolysis of ZIF-Co with assistance of a small amount of KNO 3 . KNO 3 plays important roles in tuning the inner and the outer structures of Co-CoO x @NOC hybrid nanostructures. The proposed S Ov , which is defined as the content of oxygen vacancy (O v ) per unit surface area of the inner Co-CoO x nanoparticle, and charge transfer resistance ( R ct ) are used as the descriptors of the inner structures, while hydrophilicity (or contact angle) is applied as the main feature of the outer structures. S Ov , R ct and hydrophilicity are well tuned by the fed mass of KNO 3 , and a moderate fed mass is the key to balancing S Ov , R ct and hydrophilicity and further is beneficial to accelerating specific and intrinsic activity for both HER and OER . Thus, the bifunctional HER/OER specific and intrinsic activity is peaked by Co-CoO x @NOC-0.025KNO 3 with a moderate fed mass of KNO 3 of 0.025 g, such as j s-250-HER of 539.22 μA cm -2 BET and j s-350-OER of 129.83 μA cm -2 BET at the HER and OER overpotentials of 250 and 350 mV, respectively, also corresponding to high turnover frequencies of 6.653 and 0.801 s −1 , respectively. The optimal catalyst also has high apparent activity, such as achieving high HER and OER current densities of 500 mA cm −2 , only requiring low overpotentials of 273.1 and 382 mV, respectively. It promotes overall water splitting with a high current density of 500 mA cm −2 at a cell voltage of ∼ 1.63 V, showing the high HER and OER Faradaic efficiencies of ∼ 98.2 and ∼ 98.0 %, respectively.
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DOI
高影响因子
CATALYSIS TODAY
·
2024
·
IF 5.2
Gongheng Zhang,Fengxiang Yin,Gideon Kofie,Qiuyue Gao,Jie Zhang,Guoru Li,Biaohua Chen
ZIF-67(CoFe) was synthesized using the solvothermal method , and the precursor of ZIF-67(CoFe)/xC-yIL was obtained by grinding the mixture of ZIF-67(CoFe), [BMIM][NTf 2 ] ionic liquid (IL), and carbon black. A series of ZIF-67(CoFe)/xC-yIL-T catalysts were prepared by calcining the precursor at different temperatures. The structure of the catalysts was examined using XRD , TEM, BET and XPS analysis. The results show that the high-temperature treatment of the precursor contributes to the formation of the structure of the N, S-co-doped carbon-coated nanoparticles . The introduction of ionic liquid increases the specific surface area of the catalysts and exposes more active sites. At the same time, as a sulfur source, ionic liquid forms a C-S bond, which is conducive to improving ORR activity. The optimal ORR half-wave potential and limited current density of ZIF-67(CoFe)/1.5 C-45IL-600 are 0.87 V vs. RHE and 4.64 mA cm -2 , respectively, in 0.1 mol L −1 KOH.
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DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Jingying Yang,Mingfei Pan,Xiao Yang,Kaixin Liu,Yang Song,Shuo Wang
In-situ, real-time and sensitive detection of multiple pesticide residues in food is always an important issue in food safety. Herein, a novel multifunctional bead-string like Ag nanowires@zeolitic imidazolate framework-8 (Ag NW@ZIF-8) core–shell nanochains was successfully synthesized and utilized as surface-enhanced Raman scattering (SERS) substrate for in-situ and simultaneous detection of pesticide residues . Due to the microporous framework structure of ZIF-8 shell and the plasmon property of Ag NWs core, the Ag NWs@ZIF-8 composite was demonstrated to have strong adsorption performance and high SERS activity (enhancement factor: 4.6 × 10 7 ). The Ag NWs@ZIF-8 based SERS strategy achieved sensitive detection of two water-insoluble pesticides methylparathion and carbaryl with detection limits as low as 7.6 × 10 −9 M and 5.7 × 10 −9 M, as well as the in-situ detection of multi-pesticide residues on fruits and vegetables with acceptable recovery ranged from 77.4 % to 117.5 %, demonstrating its great potential for in-situ and rapid detection of food contaminants.
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DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Mu Li,Jingwen Luo,Jianjiang Lu,Wentao Shang,Jiale Mu,Feiyun Sun,Zijun Dong,Xiaoyan Li
A novel Polyacrylonitrile (PAN) composite membrane involving ZIF-8 nanoparticles , named as ZIF-8/PAN membrane, was obtained via electrospinning to remove the Congo red (CR), Pb(II) and Cu(II) ions in industrial wastewaters , during which the adsorption mechanisms were examined in this study. The adsorption efficiency of the electrospun ZIF-8/PAN membrane was as high as 89%, 92% and 76% for CR, Pb(II) and Cu(II), respectively. Comparative analysis showed that ZIF-8 nanoparticles embedded in the ZIF-8/PAN membrane accounted for these enhanced adsorption capabilities. The adsorption behaviors of the ZIF-8 nanoparticles were investigated through experiments and theoretical analysis, and the results unraveled that the adsorption for CR by the ZIF-8 was mainly including electrostatic interaction, hydrogen bonding and π − π interaction, while those for Pb(II) and Cu(II) were mainly caused by ion-exchange and chemical adsorption. Parametric studies were conducted to optimize the conditions for removing CR, Pb(II), and Cu(II) by ZIF-8 nanoparticles, during which all of pollutants showed different reactions to the solution pH. This work not only develops a novel ZIF-8/PAN composite membrane for effective removals of pollutants, but also reveals the underlying mechanisms of pollutants adsorption in terms of molecular interactions, providing important understandings on fibrous materials design for efficient heavy metals and dyes removals in industrial wastewater treatment .
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yingying Xu,Xiangmei Meng,Tianhao Zou,Jianqiao Wang,Pengfei Xiao
Chloroquine phosphate (CQP) is a drug widely used in clinical anti malaria and treatment of novel coronavirus pneumonia. Meanwhile, it has persistence in water. This substance has become a new type of environmental pollution that requires urgent attention and effective remediation strategies. Therefore, in this study, nickel molybdenum layered double hydroxide (NixMoy-LDH) was coated on ZIF-67 through hydrothermal treatment and used as a catalyst to activate CaSO 3 for the degradation of CQP. Investigated the effects of catalyst ratio, initial pH, and coexisting substances in the system on the degradation of CQP. Under the optimal metal ratio synthesis conditions, NiMo4-LDH@ZIF-67/CaSO 3 achieved a 95.6% CQP degradation rate within 30 min, demonstrating excellent activity. Comprehensive characterization shows that the close interaction between ZIF-67 and NixMoy-LDH can improve the stability of the catalyst, accelerate the redox cycle of Ni ions, and enhance the activation of CaSO 3 . Quenching experiments, electron paramagnetic resonance, and competitive dynamics confirm that SO 4 •− , •OH and 1 O 2 , species contribute to the degradation process. By combining LC-MS and DFT calculations, the possible degradation pathways of CQP were analyzed, the main intermediates were identified, and the toxicity of the intermediates was evaluated. It is worth noting that after five cycles, the degradation rate of pollutants by the catalyst remained at 93%, proving that the catalyst has excellent stability. The catalyst has excellent reusability and effectiveness in various pollutants and different water bodies. This work emphasizes that the NiMo4-LDH@ZIF-67/CaSO 3 system is a promising pharmaceutical wastewater treatment technology.
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DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Xu Pan,Fei Li,Ye Chen,Qing Wen,Xiaoqian Li,Junhong Wang,Haitao Xu,Liuqingying Yang
As a green conversion/energy storage device, the practical application of microbial fuel cell (MFC) was limited with its low power generation. The extracellular electron transfer efficiency was one of the key factors affecting the power generation performance of MFC. This paper reported the carbonized derivative Co-Ni-ZIF@NC derived from PANI-doped Co-Ni-ZIF with conductivity, biocompatibility and high electrocatalytic activity. Density functional theory (DFT) confirmed the strong interaction between the electrode surface and microorganisms. The maximum power density of the MFC with Co-Ni-ZIF@NC anode (8.67 W/m 3 ) was 1.47 time higher than that of Co-Ni-ZIF@C-800 (5.96 W/m 3 ). High-throughput sequencing revealed that Co-Ni-ZIF@NC catalyst facilitated the screening of relevant functional microbial communities in microbial membranes, leading to the reinforcement of power generation in MFC. PICRUSt predicted the relative abundance of functional genes, confirmed the spontaneous enrichment behaviour of functional microorganisms to the electrode surface, and identified cytochrome c552 as the dominant role in the EET process. The above foregoing mainly due to the doping of PANI, improved the content of pyrrolic N on the surface of derivatives, protected the original crystal morphology, promoted the approaching behaviour of conductive flagella to the anode surface and shortened the electron transport distance, thus Co-Ni-ZIF@NC exhibited superb bioelectrocatalytic activity.
研究领域:
能源材料
·
电化学
·
微生物电化学系统
·
计算化学
·
环境生物技术
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2023
·
IF 7.4
Wei Yang,Ximing Zheng,Mingli Cao
Spent adsorbents often contain harmful substances, which may have an impact on the ecological environment if these substances enter the environment. This study mainly introduces a safe treatment method for solid waste formed after heavy metal ions are adsorbed by an efficient adsorbent, ZIF-8@GO-COOH. This work mainly discusses the impact of solidifying the spent adsorbent in the cement system on the cement mechanical properties and hydration process. The experimental results showed that when the dosage of the spent adsorbent was 0.01%, 0.02%, 0.03%, and 0.04%, respectively, the compressive strength of 28 d was increased by 4.24%, 6.16%, 7.19%, and 8.87%, respectively, compared with the cement without spent adsorbent. Introducing spent ZIF-8@GO-COOH in the cement production process does not have a negative impact on the cement mechanical properties, and can refine the cement pore structure and dense microstructure, thereby improving the compressive strength. The Toxicity Characteristic Leaching Procedure (TCLP) results showed that solidifying the spent adsorbent with cement can effectively reduce the leaching of heavy metal ions in the spent adsorbent. This study solidifies the spent ZIF-8@GO-COOH nanoadsorbent material into the cement system as a sustainable alternative to landfilling. This treatment method has certain economic benefits and safety, and has some reference significance for promoting the development and improvement of spent adsorbents and improving their safe treatment and reuse.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Pengfei Zhu,Xiaolong Wu,Xingyang Xiao,Ming Duan,Dan Luo,Jinru Lin
In this work, Bi 12 O 17 Cl 2 and ZIF-8 were synthesized via a facile in-situ precipitation method, while ZnO-CN was obtained through the pyrolysis of ZIF-8. Then, a novel Bi 12 O 17 Cl 2 /ZnO-CN composite catalyst with Z-scheme heterojunction was prepared by mechanical mixing-low temperature activation method. When the ZnO-CN is pyrolyzed at 550 ℃ and accounts for 10 wt% in the Bi 12 O 17 Cl 2 /ZnO-CN composite, the composite exhibited a significantly higher degradation rate for levofloxacin hydrochloride (LVX) (94.50%) compared to Bi 12 O 17 Cl 2 (67.30%) and ZnO-CN (36.80%), while also achieving a high removal rate of Cr(VI) under acidic conditions (92.00%). And the toxicity of LVX to wheat decreased significantly after photocatalytic degradation. Meanwhile, the Bi 12 O 17 Cl 2 /ZnO-CN has good universality, salt resistance and reuse stability. The experimental results of sample characterization show that the improved photocatalytic performance of Bi 12 O 17 Cl 2 /ZnO-CN composite can be attributed to the high-efficiency separation of electron-hole pairs (e - -h + ), enhanced light absorption in the visible region, increased specific surface area and active sites. Both the free radical capture experiment and electron paramagnetic resonance (EPR) test indicate that •O 2 - and h + are the primary active species in the process of degrading LVX by Bi 12 O 17 Cl 2 /ZnO-CN. Combined with mechanism exploration experiment and iquid chromatography-mass spectrometry (LC-MS) analysis, a possible direct Z-scheme heterojunction electron transfer mechanism and photocatalytic degradation pathways for LVX was proposed. This work enhances the photocatalytic performance of Bi 12 O 17 Cl 2 and provides an idea for antibiotic or Cr(VI) wastewater treatment.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhenfei Liu,Dingding Ye,Xun Zhu,Shaolong Wang,Yanan Zou,Linghan Lan,Rong Chen,Yang Yang,Qiang Liao
Non-precious metal materials are considered as the most promising catalysts for oxygen reduction reaction (ORR) due to their high catalytic activity, low cost, superior stability as well as good electrocatalytic selectivity. Here, in situ encapsulation of Co nanoparticles into N-doped porous carbon (Co@NPC) nanocages interconnected by carbonized multi-walled carbon nanotubes (C-MWCNTs) are prepared through direct carbonization of the MWCNTs-based ZIF-67 precursor. The obtained hybrid material (denoted as Co@NPC/C-MWCNTs) displays an excellent ORR performance with a half-wave potential of 0.79 V, effective four-electron transfer and superior formate-tolerance ability. The superior ORR activity of the Co@NPC/C-MWCNTs hybrids is mainly ascribed to the abundant catalytic active sites contributed by the Co@NPC nanocages, the high electrical conductivity and large specific surface area rooting in C-MWCNTs, and synergetic effects between Co@NPC nanocages and C-MWCNTs. The membraneless flexible direct formate fuel cell (DFFC) using Co@NPC/C-MWCNTs as the cathode catalyst delivers a peak power density of 4.32 mW cm −2 stably. Notably, the performance of the flexible DFFC can still maintain 90.9% of its initial value after repeated bending for 1000 times. Moreover, two flexible DFFCs connected in series mode can easily power some low-power electronics. The report not only opens a new door to design high-performance non-precious metal ORR catalysts for DFFCs, but also greatly boosts the development of flexible energy conversion and storage devices.
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DOI
高影响因子
Nano Research
·
2023
·
IF 9.9
Chen Tanlin,Tian Yingrui,Guo Zihao,Chen Yao,Qi Qing,Meng Fanbin
In order to meet the requirements of the marine environment for microwave absorption (MA) materials, we put forward the strategy of constructing multi-functional composite materials, which integrate microwave absorption, anti-corrosion, and antibacterial properties. Herein, graphene oxide (GO) was used as a template to induce the growth of zeolitic imidazolate framework-8 (ZIF-8), simultaneously as a two-dimensional (2D) nanocontainers to load corrosion inhibitors to achieve pH-responsive and self-healing properties. Finally, quaternary ammonium salt (dimethyl octadecyl(3-trimethoxylsilyl propyl) ammonium chloride (DMAOP)) and sodium ascorbate (VCNa) were introduced to achieve synergistic antibacterial activity and the reduction of GO. The 2D strip-like structure of ZIF-8 was due to the confined growth induced by the electrostatic attraction between ZIF-8 and GO sheets. The as-obtained reduced GO (RGO)/ZIF-8/DMAOP 5 exhibited excellent microwave absorption (MA) properties, with a minimum reflection loss (RL) value of −47.08 dB at 12.73 GHz when the thickness was 2.8 mm. Moreover, the effective absorption bandwidth reached 6.84 GHz. After soaking in 3.5% NaCl solution for 35 days, the RGO/ZIF-8/DMAOP 5 −0.7% coating still achieved an impedance value of 4.585 × 10 7 Ω·cm 2 and a protective efficiency of 99.994%, providing superior anti-corrosion properties. In addition, fantastic antibacterial activity was obtained, with the antibacterial rates of RGO/ZIF-8/DMAOP 10 reaching 99.39% and 100% against Escherichia coli and Staphylococcus aureus . This work could open new avenues towards the development of a new generation of multifunctional MA materials.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 19
·8701-8713
·
IF 3.591
Yingxue Tu,Caifen Lei,Fei Deng,Yiang Chen,Ying Wang,Zhenkun Zhang
Metal–organic frameworks (MOFs) have the potential to boost the undervalued biomedical applications of metal ions. Such endeavor has been hindered by the challenge of how to avoid the (cyto)toxicity of the prematurely released metal ions to healthy cells or organisms and amorphous precipitates of ions formed with components in biological fluids before achieving targeting applications. The current work aimed to partially address such challenges by developing a prototypical metal ion reservoir. We prepared well-defined core–shell ZIF-8@PDA nanoparticles, with zeolitic imidazolate framework-8 (ZIF-8) as the reservoir of Zn2+ and polydopamine (PDA) with inherent metal ion chelating capabilities as the shell. The well-known self-etching problem of MOF templates upon polydopamine coating was mitigated by controlling the surface properties of cubic ZIF-8 nanoparticles. As regulated by the PDA shell that can partially trap the prematurely released metal ions, ZIF-8@PDA nanoparticles had a unique Zn2+ releasing behavior consisting of a limited releasing stage followed by pH-dependent burst releasing that could quickly increase the local Zn2+ concentration to harmful levels. Enhanced antibacterial efficiency of ZIF-8@PDA against Gram-positive Staphylococcus aureus was demonstrated. This could be attributed to the strong interaction of ZIF-8@PDA with bacteria as driven by inherent bioadhesion of PDA, which could promote direct interactions of released zinc ions with bacteria by avoiding potential precipitations.
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高影响因子
危险品化学品经营许可证（带存储）