NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 34
·15503-15513
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IF 3.591
Xu Yang,Yuhong Zhou,Zhaojie Sun,Chunhui Yang,Dongyan Tang
The integrated combination of zeolitic imidazolate framework-8 (ZIF-8) into electrospun fibers and surface functioned polyacrylonitrile (PAN) fibers with polydopamine (PDA) both showed great potential in the removal of heavy metal ions (such as Cr(VI)) from aqueous solution in our previous works. Based on these results, here we report a more facile strategy to fabricate composite ZIF-8@PDA/PAN fibers as efficient adsorbents by PDA coating assisted ZIF-8 continuous growth on electrospun PAN fibers. Benefiting from the abundant functional groups (including amino and hydroxyl) of PDA, ZIF-8 particles effectively grew and were loaded on the surface of fibers with uniform distributions and thicker ZIF-8 layers were obtained easily by prolonging the reaction time. The obtained composite ZIF-8@PDA/PAN fibers retained higher surface areas (the maximum of 299.9 m2 g−1) and appropriate pore sizes, meanwhile they exhibited super hydrophilicity and good water stability, which are well known to be vital for the removal of Cr(VI). Thus, the composite fibers exhibited significant removal efficiency (especially more than 90% at a lower initial Cr(VI) concentration) and also higher adsorption capacity (with a maximum of 212.7 mg g−1) and good recyclability.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
INDUSTRIAL LUBRICATION AND TRIBOLOGY
·
2022
·Vol. 74
·期 5
·531-541
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IF 1.442
Hongxia Ma,Wei Wu,Heng Zhang,Zeyun Wang
Purpose This paper aims to propose a new strategy to functionalize zeolitic imidazolate frameworks (ZIF-8) to improve its dispersion stability and tribological properties in lubricating oil. Design/methodology/approach Dialkyl dithiophosphate polydopamine ZIF-8 (DDP@PDA@ZIF-8) was prepared via mussel-inspired chemistry and the Michael addition reaction. The tribological properties of DDP@PDA@ZIF-8 as an additive in the white oil were evaluated with four-ball friction and wear tester at different temperatures. The worn surface was analyzed using X-ray photoelectron spectrum (XPS). Findings The as-prepared DDP@PDA@ZIF-8 shows high dispersion stability in the white oil. Tribological results confirmed that the DDP@PDA@ZIF-8 exhibited a small wear scar diameter at 25°C. However, excellent friction reduction and anti-wear properties were observed at 75°C. The XPS result indicates that a series of tribochemical reactions occurred on the worn surface, forming the complex protective film. Originality/value This paper provides a study of highly dispersed ZIF-8 as lubrication additives.
研究领域:
材料科学
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化学工程
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机械工程
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纳米技术
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DOI
高影响因子
RENEWABLE ENERGY
·
2024
·
IF 9
Wenli Zhang,Jifei Liu,Hongwei Gu,Cheng Pan,Yifei Long,Qunpeng Cheng,Guozhi Fan
The metal-organic framework materials ZIF-8 and UiO-66-NH 2 , synthesized by hydrothermal methods, were characterized in detail and combined to catalyze the transfer hydrogenation of 5-hydroxymethylfurfural (5-HMF) to 2,5-di(hydroxymethyl)furan (2,5-DHMF) using isopropanol as the hydrogen source. The ZIF-8/UiO-66-NH 2 catalyst mixture exhibited abundant Lewis acid-base sites and a hierarchical multiporous structure with a large specific surface area (564.0 m 2 /g). The conversion of 5-HMF reached 98.2 %, and the selectivity and yield of 2,5-DHMF were 96.2 % and 94.5 %, respectively. The recycling performance of ZIF-8/UiO-66-NH 2 was also investigated, and the conversion of 5-HMF and selectivity of 2,5-DHMF significantly decreased to 78.4 % and 79.1 % in the second run, respectively. The loss of −NH 2 groups was found to be the main reason for the decrease in activity. However, the catalytic activity of the recovered catalyst can be almost completely restored by the addition of a small amount of fresh UiO-66-NH 2 and ZIF-8, and the conversion of 5-HMF and selectivity of 2,5-DHMF were increased to 89.4 % and 95.5 %, respectively. In the proposed reaction mechanism, Lewis acid-base sites play important roles and exhibit a synergistic catalytic effect in the selective conversion of 5-HMF to 2,5-DHMF.
研究领域:
化学工程
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催化科学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Yuxin Song,Huan Xing,Liang Ma,Fengxia Wang,Mingfang Zhang,Zherui Wan,Xuewen Li,Yan Tang,Guang Yang
Heavy metal ions (HMIs) pose a great threat to human health because of their irreversible detrimental effects, thus the fabrication of a convenient sensing platform that is capable of tracing HMIs with high accuracy remains a major challenge. Herein, a portable strategy for the fabrication of electrochemical sensor was described in which Ag-ZIF-8 and polyaniline (PANI) were combined and dropwise to glassy carbon electrode (GCE) for the recognition of Pb 2+ and Cu 2+ by DPSV. The structures and properties of the proposed working electrode (PANI/Ag-ZIF-8/GCE) were studied by TEM, SEM, FT-IR, XRD, CV and DPSV. Additionally, the results revealed that the designed sensing platform of the PANI/Ag-ZIF-8/GCE displayed excellent electrochemical performance for the simultaneous and individual tracing of HMIs including (Pb 2+ and Cu 2+ ) with satisfactory sensitivity and selectivity due to the excellent conductivity of PANI and large surface areas with abundant active sites on Ag-ZIF-8. The LODs for individual recognition of Pb 2+ and Cu 2+ were 0.003 μM and 0.006 μM, respectively. The LODs of simultaneous tracing of Pb 2+ and Cu 2+ were 0.004 μM and 0.008 μM, respectively. Moreover, real sample analysis of tap water and the Songhua River indicated good results with higher reliability for the detection of target HMIs, which may be beneficial for the fabrication of MOF-based probes by a simple strategy for the detection of HMIs to safeguard people’s lives and health.
研究领域:
环境科学
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材料科学
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分析化学
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产品关联
DOI
高影响因子
Biosensors-Basel
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2025
·Vol. 15
·期 12
·771
·
IF 5.6
Guo-Ying Chen,Mao-Ling Luo,Jing-Jing Dai,Feng-Qing Yang
A composite material of Mn oxide nanowires and ZIF-8 (MnxOyNWs@ZIF-8-RD) with controllable sizes and morphologies (rhombic dodecahedron-shape) was successfully synthesized under mild reaction conditions. The systematic investigation into the effects of synthesis conditions of the material on their microstructure and crystalline morphology was conducted. The material function as “tandem enzymes”, exhibiting multiple enzyme-like activities, such as peroxidase (POD)- and glutamate-oxidase (Glu OXD)-like activities. Kinetic studies reveal that the MnxOyNWs@ZIF-8-RD has excellent enzyme-like catalytic activity, with high substrate affinity and a maximum reaction rate of (H2O2: 840.52 × 10−8M·S−1). MnxOyNWs@ZIF-8-RD shows remarkable enantioselectivity for Glu enantiomers based on its POD- and Glu OXD-like activities. By integrating theoretical and experimental approaches, the recognition mechanism was preliminarily elucidated. In short, this study offered valuable insights for developing sophisticated functional materials and provided methodological references for Glu enantiomer recognition and quantitative detection.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2019
·Vol. 34
·期 4
·973-978
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IF 0.605
Wang Wanxia,Wang Youyun,Wang Yu,Zhu Hongda,Sun Honghao,Liu Mingxing
Fluorescent mesoporous silica nanoparticles functionalized with carboxyl group (Znq-CMS-COOH) were successfully synthesized by in situ formation route of 8-hydroxyquinolinate zinc complexes in channels of mesoporous silica nanoparticles and post-grafting of carboxyl group on the surface. Moreover, the particle size and structural properties of Znq-CMS-COOH were characterized by transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), dynamic light scattering (DLS). Fourier transform infrared spectroscopy (FT-IR), UV-vis spectrometer, fluorescence spectrometer and nitrogen adsorption-desorption measurements. The obtained results suggest that the Znq-CMS-COOH presents the uniform spherical shape with the mean diameter of about 85 nm and the obvious wormhole arrangement mesoporous. In addition, the Znq-CMS-COOH possesses green fluorescence with the emission peaks at 495 nm. So the Znq-CMS-COOH, which is beneficial to further modification and tracing, might be a great potential carrier for applying in drug delivery system in the future.
研究领域:
材料科学
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生物医学工程
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纳米技术
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Jiuyu Chen,Zhiwen Liu,Baozhong Zhu,Chensheng Gao,Yunlan Sun
Radioactive iodine (I) produced in the nuclear industry can be eliminated through solid-phase adsorption. Nevertheless, conventional adsorbents suffer from limited capacity, poor selectivity, and insufficient stability. In this study, metallic copper modified nitrogen-doped carbon composites (Cu x -NC) were prepared from a pre-synthesized template of Cu 2+ -zeolite imidazole framework-8 (Cu 2+ -ZIF-8) by ball milling combined with pyrolysis processes. The surface physical and chemical properties of Cu x -NC composites were characterized, and then applied to remove iodide (I - ) in aqueous solutions. The experimental results indicated that Cu 0 introduced to nitrogen-doped carbon not only significantly enhanced I - removal but also achieved an exceptional adsorption capacity of 269.2 mg/g by incorporating 35 % copper and setting the pyrolysis temperature at 1000 °C. Notably, under acidic (pH = 3) and blown air conditions, the adsorption capacity was markedly increased, attaining 383.3 and 474.3 mg/g, respectively. The Cu 35 -NC demonstrated exceptional selectivity for I - in the presence of interfering anions such as Cl - and SO 4 2- . Mechanism studies showed that as-fabricated materials eliminated I - through adsorption and oxidation. The presence of Cu 0 particles activated molecular oxygen to release Cu + and generate H 2 O 2 , resulting in I - being adsorbed and oxidized. These findings underscore the significant potential of the economical Cu x -NC for the effective elimination of radioactive iodide.
研究领域:
环境科学
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材料科学
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核工程
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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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.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2015
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IF 4.169
Xiaomei Liu,Zhiwei Sun,Guang Chen,Wanwan Zhang,Yiping Cai,Rongmei Kong,Xiaoyan Wang,Yourui Suo,Jinmao You
In this study, the magnetic Zeolitic Imidazolate Framework-8 (ZIF-8) microspheres were successfully synthesized and applied as an effective sorbent for preconcentration of several typical phthalate esters (PAEs) from environmental water samples. Firstly, the solvothermal treatment method was used for preparation of Fe 3 O 4 nanoparticles. Then, mercaptoacetic acid (MAA) was served as the functionalized chemical to modify Fe 3 O 4 nanoparticles. The Fe 3 O 4 @ZIF-8 core–shell microspheres were synthesized through coating the MAA-capped Fe 3 O 4 nanoparticles with ZIF-8. By coupling magnetic solid-phase extraction (MSPE) with high-performance liquid chromatography (HPLC), a reliable, sensitive and cost-effective method for simultaneous determination of five main PAEs including dimethyl phthalate (DMP), diethyl phthalate (DEP), di- n -butyl phthalate (DBP), benzyl butyl phthalate (BBP), and dioctyl phthalate (DOP) was developed. Good linearity was observed in the range of 1.0–100.0 μg/L. The limits of detection (S/N = 3) and limits of quantification (S/N = 10) were in the range of 0.08–0.24 and 0.3–0.8 μg/L, respectively. The relative standard deviations were less than 5.5% and the accuracies of the method for the PAEs were in the range from 85.6% to 103.6%. Finally, the Fe 3 O 4 @ZIF-8 was successfully applied for rapid extraction of trace amounts of PAEs in environmental water samples.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Xiaokai Feng,Jing Zhao,Mingzhu Xie,Yangyang Guo,Haojin Xu,Yinglu Li,Fei Liang,Kaijin Hu
ZIF-8 NMOFs have been widely utilized in the field of nano-drug delivery system, due to the highly ordered porous structure, large specific surface area, and pH responsiveness. In this study, ZIF-8 NMOF was synthesized using 2-methylimidazole (H-MIM) as the ligand and zinc nitrate hexahydrate as the metal salt. Utilizing 5-fluorouracil (5-FU) as a drug model, mussel biomimetic chitosan (Cat-CS) modified NMOFs was constructed as a drug carrier through surface modification. The particle size, structure and morphology were characterized using DLS, SEM, XRD, FT-IR and TG, and the pH-responsive property of the NMOFs was investigated. The results showed that the average particle size of the NMOFs was 186.75 nm, and the drug loading capacity and encapsulation efficiency were 9.02 % and 64.79 %, respectively. In vitro controlled release studies showed that the sustained and controlled drug release can be achieved after surface modification, with maximum cumulative release rates of 63.80 %, 43.81 %, and 34.88 % at pH 1.4, 4.0 and 7.4, significantly increasing drug release under acidic conditions and demonstrating excellent pH responsiveness. In all, the prepared NMOFs exhibit excellent stability, pH-responsiveness and biocompatibility, further prolonging drug release time and improving bioavailability, which can be used as an ideal drug carrier to enhance the efficient drug delivery.
研究领域:
药剂学
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生物材料
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纳米医学
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产品关联
DOI
高影响因子
BIOORGANIC & MEDICINAL CHEMISTRY
·
2025
·
IF 3
Feng Zhou,Xiaoqing Feng,Zhongqiu Xu,Fen Yan,Guoqiang Song,Long Tang
Urolithin A (UA) is a naturally occurring polyphenolic compound.Due to its remarkable efficacy in safeguarding the central nervous system, UA has emerged as a promising candidate for drug development targeting neurodegenerative diseases such as Alzheimer’s. However, the source of UA is limited and the activity of UA to inhibit PDE2 needs to be further improved. Therefore, this study will be optimized on the basis of UA to seek PDE2 inhibitors with better activity. In this study, we designed a series of UA derivatives based on 4HTX as the target protein and UA as the lead compound, utilizing the binding crystal structures of 4HTX and BAY60-7550 as references. After thorough screening, we successfully identified the 8-hydroxyl group as the precise site of modification. Utilizing 2-bromo-5-hydroxybenzoic acid as our primary raw material, we synthesized a series of the 8-hydroxyl modified UA. Subsequently, we evaluated the inhibitory activity of these synthesized UA derivatives using a phosphodiesterase assay kit. Ultimately, we screened a total of 34 derivatives; among them, compounds 1f, 1q, 2d, and 2j exhibited significant inhibitory activity against PDE2 with half-maximal inhibitory concentrations of 3.05 μM,0.67 μM, 0.57 μM, and 4.96 μM, respectively.
研究领域:
药物化学
·
神经科学
·
有机合成
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Zhina Wu,Yingtong Wang,Yaqin Zhang,Jingzheng Yi,Yutong Li,Jiasi Wang,Min Hu,Di Wang
Periodontitis is one of the most prevalent oral diseases, and the diagnosis and monitoring of periodontitis rely on clinical and imaging examinations. Matrix metalloproteinase-8 (MMP-8) in saliva is a reliable indicator of periodontitis. The traditional detection method is enzyme-linked immunosorbent assay (ELISA), which requires professional expertise and is not sensitive enough to low-abundance protein detection. In this study, we developed a nanoimmunoassay combined with clustered regularly interspaced short palindromic repeats (CRISPR) and CRISPR associated protein (Cas)12a for ultrasensitive detection of MMP-8 in saliva. Antibody-DNA-gold nanoparticles (AuNPs) and trans-cleavage activity of CRISPR/Cas12a were employed for signal amplification. With this protocol, the limit of detection (LoD) for MMP-8 was reduced to the fg/mL, indicating 100-fold higher sensitivity than that of the commercial ELISA kit and its amenability for ultrasensitive detection of trace proteins. The diagnostic sensitivity of the assay was 100 %, and the specificity was 83.3 % based on the testing of 23 clinical saliva samples. The sensitivity and specificity were considerably higher than those for ELISA. Thus, this immuno-CRISPR/Cas12a assay holds promise for both diagnosing and monitoring periodontitis in clinical settings.
研究领域:
口腔科学
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分子生物学
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生物技术
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临床诊断
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）