CHEMICAL PAPERS
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2022
·Vol. 76
·期 7
·4405-4418
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IF 2.146
Lin Yingzi,Liu Yi,Ren Ruijun,Xiao Feng,Wang Dongsheng
In this study, a ZIF-8 thin layer deposited on the surface of a hydrolyzed polyacrylonitrile (HPAN) membrane was used for highly efficient humic acid removal. The thin ZIF-8 layer was synthesized by using a two-step interfacial synthesis method, based on liquid–liquid interfacial coordination polymerization. The formation of a continuous ZIF-8 layers was confirmed by X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and atomic force microscopy. The effects of the synthesis conditions including reaction time, precursor concentration, and other operating conditions on the ZIF-8 composite membrane performance were studied using humic acid solution as organic waste. The results showed when the reaction time was extended, or when the precursor concentration was increased, the ZIF-8 layer deposited on the membrane surface became denser. Compared with the unmodified HPAN substrate, the composite membrane deposited with the ZIF-8 layer showed better processing ability for organic matters due to the strong electrostatic interaction of organic matter with the ZIF-8@HPAN membrane and the ZIF-8 particles unique structural characteristics, which shows a great application prospect for humic acid treatment compared with other membrane technologies.
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
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 31
·15275-15287
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IF 3.553
Liu Wenlong,Zhang Hua,Zhang Wen,Wang Mei,Li Jiahui,Zhang Yun,Li Hongyang
Abstract Metal–organic frameworks (MOFs) materials have unique advantages such as high surface area and favorable structures in the drug delivery system. However, MOFs have the characteristics of easy aggregation and poor dispersion, which make the drug delivery not to reach the ideal effect. Developing biodegradable carrier for controlled drug delivery is still a challenging task. In this work, the zeolitic imidazolate framework-8/polylactic acid (ZIF-8/PLA) composite membranes were prepared by secondary growth method on the surface of electrospun nanofiber membrane. As the incubation time prolonged and the 2-methylimidazole (2-MIM) concentration increased, the size of ZIF-8 particles increased and the distribution of ZIF-8 became more uniform, resulting in increased the hydrophilicity and surface roughness. Furthermore, PLA/ZIF-8 nanofiber membranes had excellent pH response and drug release capacity. While only up to 40% of loaded drug was released in the buffer of pH value of 7.4, over 90% of drug was released at pH 5.5 due to the dissolution of ZIF-8 skeleton at acidic solution. It indicates that the pH-responsive PLA/ZIF-8 nanofiber membrane can be used as highly efficient drug carriers. Graphic abstract
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
BIOPROCESS AND BIOSYSTEMS ENGINEERING
·
2021
·Vol. 44
·期 6
·1309-1319
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IF 3.21
Guo Feng,Xu Zhonghao,Zhang Wendong,Wang Tongxin,Di Xiaoxuan,Zhang Qian,Zhu Zihan
Enzymes immobilized in metal–organic frameworks (MOFs) have attracted great attention as a promising hybrid material. In the study, a novel biomimetic mineralization encapsulation process for a highly stable and easily reusable catalase (CAT)@ZIF-8 composite has been designed. This immobilization process provides a high enzyme loading of 70 wt %. The CAT@ZIF-8 composites exhibited a much lower K m value and better enzyme activity than those of free CAT, exhibiting good stability against enzymatic hydrolysis and protein denaturation under harsh conditions. The inhibitory effects of pesticides such as pH, temperature, solvent (i.e., methanol, dimethyl sulfoxide and tetrahydrofuran) and storage at room temperature (6 months) on the activity of free and immobilized catalase enzyme were investigated. The CAT@MOF composites also exhibited excellent reusability, an obvious advantage for treating a wastewater from food processing. The CAT@MOF developed is promising for the efficient removal of H 2 O 2 under harsh conditions.
研究领域:
材料科学
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生物化学
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环境工程
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产品关联
DOI
PubMed
高影响因子
RARE METALS
·
2023
·Vol. 43
·期 3
·984-994
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IF 8.8
Zhang Jin-Fang,Wang Yuan-Yuan,Li Xiao-Feng,Zhang Gen-Yan,Li Ying,Liu Rong,Hu Sheng-Liang,Hu Tuo-Ping,Knibbe Ruth,Xia Qing-Bing
Solid polymer electrolytes (SPEs) with high ionic conductivity are desirable for solid-state lithium metal batteries (SSLMBs) to achieve enhanced safety and energy density. Incorporating nanofillers into a polymeric matrix to develop nanocomposite solid electrolytes (NCSEs) has become a promising method for improving the ionic conductivity of the SPEs. Here, a novel ZIF-8-functionalized NCSE was prepared for high-temperature SSLMBs using an in situ radical polymerization method. It is found that the ZIF-8 nanoparticles could reduce the crystallinity of polymer segments and offer a Lewis acid surface that promotes the dissociation of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and stabilizes the TFSI − anion movement. Thus, the as-prepared NCSE exhibits an outstanding ionic conductivity of 1.63 × 10 –3 S·cm −1 , an electrochemical stability window of 5.0 V at 80 °C, and excellent interface compatibility with lithium metal anode with a stable polarization over 2000 h. Furthermore, the assembled SSLMBs with LiFePO 4 cathode show dendrite-free Li-metal surface, good rate capability, and stable cycling stability with a capacity retention of 70% over 1000 cycles at a high temperature of 80 °C. This work provides valuable insights into promoting the ionic conductivity of SPEs. Graphic abstract
研究领域:
材料科学
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能源存储与转换
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DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 10
·2044
·
IF 4.324
Weiwei Ye,Yu Zhang,Wei Hu,Liwen Wang,Yu Zhang,Ping Wang
A sensitive fluorescence resonance energy transfer (FRET) biosensor is proposed to detect 8-hydroxy-2′-deoxyguanosine (8-OHdG), which is a typical DNA oxidation damage product excreted in human urine. The FRET biosensor was based on carbon dots (CDs)-modified nanoporous alumina membrane with CDs as fluorescence donors. Gold nanoparticles were encapsulated in zeolitic imidazolate framework-8 to form Au@ZIF-8 nanoparticles as signal quenchers. CDs and Au@ZIF-8 nanoparticles were biofunctionalized by 8-OHdG antibody. The capture of 8-OHdG on the membrane substrates can bring Au@ZIF-8 nanoparticles closely to CDs. With 350 nm excitation, the fluorescence of CDs was quenched by Au@ZIF-8 nanoparticles and FRET effect occurred. The quenching efficiency was analyzed. The limit of detection (LOD) was 0.31 nM. Interference experiments of the FRET biosensor showed good specificity for 8-OHdG detection. The biosensor could detect urinary 8-OHdG sensitively and selectively with simple sample pretreatment processes. It shows applicability for detecting biomarkers of DNA damage in urine or other biological fluids.Keywords:nanoporous alumina membrane;fluorescence resonance energy transfer;Au@ZIF-8 nanoparticles;DNA oxidation damage;8-OHdG detection
研究领域:
生物传感技术
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医学诊断
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纳米生物学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 16
·24113-24128
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IF 0
Ma Xiaoxiao,Li Yutong,Du Yile,Chen Shuangli,Bai Yunfan,Li Lin,Qi Chuhua,Wu Pingping,Zhang Sijing
The presence of organic dyes in aquatic systems poses a significant threat to ecosystems and human well-being. Due to recycling challenges, traditional commercial activated carbon is not cost-effective. To address this, an imidazolate acid zeolite framework-8 (ZIF-8)-modified magnetic adsorbent (ZMPLB-800) was synthesized through the in-situ formation of ZIF-8 and subsequent carbonization at 800 °C, using magnetic pineapple leaf biochar (MPLB) as a carrier. The porous structure of ZMPLB-800 facilitates the rapid passage of dye molecules, enhancing adsorption performance. ZMPLB-800 exhibited remarkable adsorption capacity for methylene blue (MB) across a pH range of 3–13, with a maximum adsorption capacity of 455.98 mg g −1 . Adsorption kinetics and thermodynamics followed the pseudo-second-order kinetic model and Langmuir isotherm model. Mechanisms of MB adsorption included pore filling, hydrogen bonding, electrostatic interactions, π-π interactions, and complexation through surface functional groups. Additionally, ZMPLB-800 demonstrated excellent regeneration performance, recording a removal efficiency exceeding 87% even after five adsorption/desorption cycles. This study provides a novel strategy for treating dye wastewater with MOF composites, laying the foundation for waste biomass utilization. Graphical
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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DOI
FREE RADICAL RESEARCH
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2022
·
IF 4.354
Qian Liu,Zhen Liu,Chen-Chen Wang,Xin Gao,Chuan-Bao Li,Meng Wang,Qiang Wang,Jian-Ping Cai
Osteoporosis is a worldwide disease that seriously affects the quality of life and survival rate of the elderly. The detection of bone biomarkers will provide supplementary information on bone mineral density, contributing to the accurate diagnosis of osteoporosis and better health care for prevention. This study aimed to investigate the efficacy of oxidative stress markers—8-oxo-7,8-dihydroguanine (8-oxoGsn) and 8-oxo-7,8-dihydro-2′-deoxyguanosine (8-oxodGsn) in the assessment of osteoporosis. We conducted a cross-sectional study among menopausal women with a mean (standard deviation) age of 62.967 (7.798) years old (n = 151). Participants were recruited for the bone mineral density (BMD) assessment, blood and urinary samples. Urinary 8-oxo-7,8-dihydro-2′-deoxyguanosine and 8-oxo-7,8-dihydro-guanine concentrations were measured by ultra-performance liquid chromatography and tandem mass spectrometry (UPLC-MS/MS). The urinary 8-oxoGsn/Cre value differed significantly between normal and osteoporotic participants (p < 0.001), while the 8-oxodGsn/Cre value did not (p = 0.720). Even after adjusting for the age and body mass index, the BMD was still associated with urinary 8-oxoGsn/Cre value. ROC analysis showed that 8-oxoGsn has a strong diagnostic value for osteoporosis (AUC = 0.744). The results show for the first time that 8-oxoGsn may be a biomarker for the future diagnosis of osteoporosis in women.
研究领域:
老年医学
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内分泌学
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骨骼和矿物质代谢
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氧化应激研究
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产品关联
DOI
PubMed
高影响因子
NANO
·
2022
·
IF 1.438
Wan Gao,Yanliang Li,Wuming Xie,Jianzhi Huang,Lei Li,Zhixin Qiu
Antibiotics are a class of organic pollutant in the medical field for hundreds of years. Due to the continuous discharge of antibiotics in the environment, the phenomenon of pseudo-persistence of antibiotics is produced. Therefore, it is necessary to develop an advanced sustainable technology to remove antibiotics from water resources. In this study, Zeolite Imidazole Framework-8 (ZIF-8) was prepared by a simple and rapid method. Oxytetracycline (OTC) degradation was performed using ZIF-8 as a photocatalyst under visible light (VL) (500 W xenon lamp) irradiation. Under different experimental conditions, ZIF-8 has strong catalytic removal performance for OTC. When the reaction conditions are: OTC concentration of 80 mg L − 1 , ZIF-8 concentration of 1.0 g L − 1 , pH 5.96, the OTC removal rate is more than 90%. Through the detection and analysis of degradation intermediates, the possible degradation pathway of OTC was proposed. This study showed that the OTC removal rate of ZIF-8 could still reach 69% after four times of recycling. The results showed that the ZIF-8/VL system had high OTC removal efficiency and good recyclability.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2019
·
IF 2.291
Yueting Chen,Shaokun Tang
Zeolitic imidazole framework-8 (ZIF-8) with a novel porous hydrangea-like morphology was successfully synthesized with solvothermal synthesis using zinc nitrate as the metal source and 2-methylimidazole as the organic ligand. The effects of reaction temperature and reaction time on the morphology of the crystal were investigated and the samples were characterized in detail. The results show that the porous hydrangea-like ZIF-8 crystal can be obtained at different temperatures from 110 to 140 °C. At the same temperature, with the increase of reaction time, the particles are transformed from porous hydrangea-like into the rhombohedral polyhedron. Combining primary particle self-assembly with Ostwald ripening , we propose a mechanism for the formation of porous hydrangea-like ZIF-8 in a classical crystal growth pathway. In comparison, ZIF-8 with rhombohedral polyhedron can be quickly synthesized via microwave-assisted synthesis.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
MEDICINAL CHEMISTRY RESEARCH
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2020
·Vol. 29
·期 10
·1867-1873
·
IF 1.783
Yang Xin-Bin,Huang Yu
The water-soluble sulfated derivatives, apigenin-8-sulfonate sodium (AS) and apigenin-3′, 8-disulfonate sodium (ADS) derived from parent apigenin (AP), were synthesized and characterized by infrared (IR) spectra, hydrogen nuclear magnetic resonance ( 1 H NMR), carbon nuclear magnetic resonance ( 13 C NMR), high-resolution mass spectra (HRMS), and elemental analysis. The mice model of hepatotoxicity induced by d -Galactosamine ( d -GalN) was used to evaluate the hepatoprotective effects of AP, AS, and ADS. The results indicated that AP, AS, and ADS could reduce the level of serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), and hepatic malondialdehyde (MDA) induced by d -GalN, and restore the activities of antioxidant enzymes superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) toward normal levels. The histological results also suggested that AP, AS, and ADS could alleviate liver toxicity. The possible mechanisms could be ascribed to the protection role of AP, AS, and ADS, which kept hepatic cells from oxidative damage and maintain intracellular antioxidant enzyme activity. These findings uncovered that AP, AS, and ADS were able to protect liver from d -GalN-induced acute damage, and AS was the most potent hepatoprotective drug among the three compounds.
研究领域:
药理学
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肝病学
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生物化学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 17
·1807191
·
IF 15.621
Zequn Yang,Hailong Li,Jianping Yang,Shihao Feng,Xi Liu,Jiexia Zhao,Wenqi Qu,Pu Li,Yong Feng,Po-Heng Lee,Kaimin Shih
A key challenge in elemental mercury (Hg 0 ) decontamination from flue gas lies in the design of a sorbent with abundant reactive adsorption sites that exhibit high affinity toward Hg 0 to simultaneously achieve rapid capture and large capacity. Herein, zeolitic imidazolate framework-8 (ZIF-8) supported copper selenide (CuSe) nanocomposites are synthesized by a newly designed two-step surfactant-assisted method. The as-prepared CuSe/ZIF-8 with CuSe to ZIF-8 mass ratio of 80% (0.8NC-ZIF) exhibits unparalleled performance toward Hg 0 adsorption with equilibrium capacity and average rate reaching 309.8 mg g −1 and 105.3 µg g −1 min −1 , respectively, surpassing all reported metal sulfides and traditional activated-carbon-based sorbents. The impressive performance of 0.8NC-ZIF for Hg 0 immobilization is primarily attributed to the adequate exposure of the Se-terminated sites with high affinity toward Hg 0 resulted from the layered structure of CuSe. The adsorbed mercury selenide exhibits even higher stability than the most stable natural mercury ore—that is, mercury sulfide—hence minimizing its environmental impact when the CuSe/ZIF-8 sorbent is dumped. This work provides a new mindset for future design of sorbents for efficient Hg 0 capture from industrial flue gas. The results also justify the candidature of CuSe/ZIF to be applicable for mercury pollution remediation in real-world conditions.
研究领域:
环境科学
·
材料科学
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化学工程
·
污染控制
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiaohui Niu,Simeng Yan,Rui Zhao,Hongxia Li,Xiaoyu Liu,Kunjie Wang
In the pursuit of chiral materials with significant chiral recognition effects and stability, various strategies have been explored, among which the integration of metal nanoparticles and chiral metal–organic frameworks (CMOFs) is highly promising. However, metal nanoparticles (MNPs)/CMOFs show high chiral properties but inferior stabilities due to the MNPs being easily detached from the outside layer under certain conditions. Sandwich MOFs@MNPs@CMOF chiral materials can overcome this dilemma because the sandwich structure can maximize the regulation of the chiral interface activity, while the controlled outer layer can stop the MNPs from falling off in the procedure of chiral recognition. Here, a novel sandwich chiral material (d-His-ZIF-8@Au@ZIF-8) was synthesized by a ligand-assisted strategy with a well-defined sandwich morphology and chiral recognition capabilities. The electrochemical chiral recognition showed that d-His-ZIF-8@Au@ZIF-8 was the most efficient for the enantiomer of phenylalanine (Phe). This experiment presents a novel perspective for the fabrication of a chiral electrochemical sensing platform based on a solid sandwich chiral nanocomposite.
研究领域:
材料科学
·
电化学
·
纳米技术
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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）