ELECTROPHORESIS
·
2016
·
IF 2.482
Qishu Qu,Han Xuan,Kehua Zhang,Yi Ding,Qin Xu
In this work, open-tubular capillary column coated with zeolite imidazolate framework-8 (ZIF-8) nanocrystals was prepared by a layer-by-layer method. The coating was formed by growing ZIF-8 nanocrystals on either bare fused silica capillary wall or the capillary column premodified with amino groups. The shape and the thickness of the coating formed by using these two methods were almost the same. However, the coverage of the ZIF-8 crystals on the bare fused silica capillary wall was higher than that on the capillary column premodified with amino groups. The ZIF-8 coated capillary column was evaluated for open-tubular capillary electrochromatography. The effect of pH value, buffer concentration, and applied voltage on the separation of phenols was investigated. Good separation of nine phenolic isomers was achieved because of the strong interaction between unsaturated Zn sites and phenols. The column performance for o -nitrophenol was as high as 208 860 plates m −1 . The run-to-run, day-to-day, and column-to-column reproducibility of retention time and resolution for p -nitrophenol and o -nitrophenol were very good with RSDs of less than 6.5%.
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DOI
PubMed
高影响因子
ENVIRONMENTAL TOXICOLOGY
·
2018
·Vol. 34
·期 2
·141-149
·
IF 2.491
Xia Wang,Baida Kong,Bingnan He,Lai Wei,Jianbo Zhu,Yuanxiang Jin,Yudong Shan,Weitao Wang,Chunqiang Pan,Zhengwei Fu
8:2 Fluorotelomer alcohol (8:2 FTOH) is widely used in houseware and industrial goods and is ubiquitous in the surrounding environment. 8:2 FTOH has been linked to hepatoxicity, nephrotoxicity, and reproductive toxicity, as well as endocrine-disrupting effects. However, as of yet, the research regarding immunotoxicity of 8:2 FTOH remains largely limited. In the present study, adult male C57BL/6 mice were administered with 10, 30, and 100 mg/kg/d 8:2 FTOH by gavage for 28 days to investigate its immunotoxicity in vivo. The results showed that exposure to 8:2 FTOH caused increases in liver weight and histological changes in the liver, including vacuolation, cell swelling, immune cell infiltration, karyopyknosis and nuclear swelling. No histological change in either the spleen or the thymus was observed after administration of 8:2 FTOH. In addition, exposure to 8:2 FTOH reduced the concentration of IL-1β in serum, and mRNA levels of IL-1β, IL-6 , and TNF-α in both the thymus and spleen. CXCL-1 mRNA expression was downregulated in both the liver and thymus after 8:2 FTOH administration, while only IL-1β mRNA expression was upregulated in the liver. Moreover, the exposure of primary cultured splenocytes to 8:2 FTOH inhibited the ConA-stimulated proliferation of splenocytes at concentrations of 30 and 100 μM, and the LPS-stimulated proliferation of splenocytes at 100 μM. Furthermore, 8:2 FTOH inhibited the level of secreted IFN-γ in ConA-stimulated splenocytes. The results obtained in the study demonstrated that 8:2 FTOH posed potential immunotoxicity and liver injury in mice. Our findings will provide novel data for the health risk assessment of 8:2 FTOH.
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PubMed
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 181
·期 9
·903-910
·
IF 3.719
Wang Jia-Cheng,Wang Yong-Sheng,Rang Wei-Qing,Xue Jin-Hua,Zhou Bin,Liu Lu,Qian Qiu-Mei,Wang Yong-Song,Yin Ji-Cheng
We report on a sensitive and specific method for the visual and colorimetric detection of 8-hydroxy-2′-deoxyguanosine (8-OHdG) in human urine by using the 8-OHdG-aptamer (Apt) as the recognition element. The aptamer was adsorbed on the surface of gold nanoparticles which enhances their stability. On addition of 8-OHdG, the conformation of the aptamer changes to form a G-quadruplex structure, thereby losing the ability to protect the nanoparticles and causing a color change from red to blue. The conformational changes were also studied by circular dichroism. The response is linearly dependent on the concentration of 8-OHdG in the range from 5.6 to 282 nM, the limit of detection is 1.7 nM, the relative standard deviation ranges from 1.1 to 4.2 % (for n = 6), and the recoveries range from 95.9 to 104.9 %. The method paves the way for visual analysis of samples without the use of costly instruments.
8-OHdG-aptamer was adsorbed onto the surface of AuNPs which enhances their stability. On addition of 8-OHdG, the conformation of 8-OHdG-aptamer changes to form a G-quadruplex structure, losing the ability to protect the AuNPs and causing a color change of the system.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Qian-Qian Li,Yang Li,Heng Mao,Yan-Mei Zhang,Qiu-Ying Zhang,Xin-Ru Chen,Zi-Cong Shan,Xian-Zhe Zhou,Li-Hao Xu,Zhi-Ping Zhao
Mixed matrix membranes (MMMs) have emerged as a critical platform for molecular separation, especially carbon capture from point-emission sources. In this study, a series of novel MMMs were fabricated by incorporating the bimetallic Ag/Zn-ZIF-8 nanoparticles into the poly (ether-block-amide) (Pebax) matrix for efficient CO 2 /N 2 separation. The SEM, EDS, XRD, FTIR, XPS, TGA, N 2 adsorption-desorption measurements were employed to elucidate the microstructures and physicochemical properties of the resultant nanoparticles and membranes. The bimetallic coordination-induced optimization modulated the inherent structure of ZIF-8 framework and enhanced CO 2 affinity, thereby forming the CO 2 -selective transport channels over N 2 . The incorporation of Ag + promoted the uniform dispersion of Ag/Zn-ZIF-8 nanoparticles in Pebax matrix, indicating the excellent polymer-filler interfacial compatibility. Impressively, the resulting membrane achieved the superior separation performance with a CO 2 permeability of 359 Barrer and a CO 2 /N 2 selectivity of 53, which were 2.5 and 1.4 times higher than that of the pristine Pebax membrane. Besides, the introduction of Ag/Zn-ZIF-8 nanoparticles enhanced the thermal and mechanical stability of the membrane, ensuring the potential for long-term operation. These findings herein advance the rational design and preparation of high-performance MMMs for sustainable carbon capture.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Mingyin Qiu,Ying Men,Zhe Lin,Lipiao Bao,Ziyu Qin,Xing Lu
The growing demand for multifunctional sensors in wearable systems has prompted the need for materials that simultaneously support gas sensing and mechanical strain detection. However, current flexible sensing materials still suffer from issues such as response hysteresis, poor humidity resistance, and lack of antibacterial properties. Herein, we developed a ternary flexible composite by integrating defect-engineered ZIF-8, conductive polypyrrole (PPY), and bacterial cellulose (BC), which was further encapsulated with polydimethylsiloxane (PDMS) to form the Def-ZIF-8/PPY/BC@PDMS composite. The results demonstrated that with 2–3 layers of PDMS, the sensor achieved a fast and stable NO 2 response (9.3% at 10 ppm), with reliable recovery. Under 80% relative humidity, PDMS reduced humidity-induced signals from 34% to 10.3%, confirming markedly improved moisture resistance. The incorporation of a PDMS layer enabled enhanced stress sensing, reducing the response/recovery times to 0.4/0.3 s from 0.9/0.8 s in the uncoated structure. The sensor demonstrated high fidelity in recognizing complex biomechanical signals such as swallowing, walking, and finger articulation. Furthermore, antibacterial testing confirmed 42.18% and 64.69% inhibition against Escherichia coli and Staphylococcus aureus , respectively. This multifunctional composite simultaneously optimizes gas sensing, mechanical flexibility, humidity resistance, and antibacterial efficacy, paving the way for advanced materials in fully integrated wearable sensing technologies.
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高影响因子
Biosensors-Basel
·
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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PubMed
高影响因子
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
·
2025
·
IF 3.2
Li Fenglan,Zhang Yuanyuan,Ye Chenliu,Zhuang Junyang
The treatment of breast cancer (BC) faces multiple challenges, including high recurrence rates, drug resistance, and toxic side effects. This study constructed a cell membrane-mimicking biomimetic cascade nanoreactor, mCGH@ZIF, which is loaded with the photosensitizer chlorin e6 (Ce6), glucose oxidase (GOx), and hemin, enabling synergistic starvation-photodynamic therapy. Within the tumor microenvironment, GOx depleted glucose and generated H₂O₂; hemin converted H₂O₂ into O₂ in situ, effectively alleviated hypoxia and amplified the generation of Ce6-mediated singlet oxygen; and the cancer cell membrane coating enabled both immune evasion and homologous targeting. In vitro experiments demonstrated that mCGH@ZIF significantly suppressed 4T1 breast cancer cell proliferation while preserving excellent biocompatibility. This strategy established a closed-loop system integrating glucose depletion, oxygen production, and reactive oxygen species (ROS) generation, overcame the limitations of monotherapies, and offered a novel approach for precision combination therapy in breast cancer.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Waqar Iqbal,Rashda,Hongzhen Cai,Jiankang Zhang,Keyan Yang,Xiangsheng Han,Shanshan Xu
The widespread pollution of water bodies with dumped antibiotics from hospital effluents, pharmaceutical wastewaters, and surface water poses a severe threat to ecosystems and human health, primarily due to the emergence of antibiotic-resistant pathogens. This study introduces an innovative electrospun cuprammonium cellulose (Cel) membrane integrating Zeolitic Imidazolate Framework-8 (ZIF-8), a metal organic framework (MOF), aimed at efficiently removing tetracycline (TC) and ciprofloxacin (CIP) in an aqueous environment. The inclusion of ZIF-8 enhances the membrane's adsorption capacity due to its high surface area and the hydrophilicity of Cel, further improving the membrane's mechanical and chemical stability. The resulting Cel/PAN@ZIF-8 composite membrane exhibited remarkable antibiotic adsorption efficiency, achieving up to 218.21 mg. g −1 for TC and 175.88 mg. g −1 for CIP, with a maximum ZIF-8 loading (4 wt%). Additionally, the membrane showed a significant antibacterial effect against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ), demonstrating its dual functionality in both pollutant removal and microbial disinfection. The adsorption kinetics followed a pseudo-second-order model, consistent with previous studies. The isotherm analysis conformed to the Langmuir model, which implies monolayer adsorption on homogeneous surfaces. The membrane exhibited high reusability, maintaining adsorption efficiencies of 88.66 % and 83.38 % after five cycles for TC and CIP, respectively, highlighting its potential for long-term use. XPS spectroscopy was employed to explore the potential adsorption mechanism for CIP and TC, with results suggesting that hydrogen bonding, π-π interactions, and electrostatic interactions play a key role in the adsorption process. The synergistic effect of ZIF-8 nanomaterials with biocompatible cellulose-based materials presents a promising approach to mitigating antibiotic contamination and combating microbial resistance. These results offer a low-cost and environmentally sustainable approach for wastewater treatment, with significant implications for public health and long-term environmental remediation.
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PubMed
高影响因子
E-POLYMERS
·
2021
·Vol. 21
·期 1
·160-165
·
IF 2.025
Chao Lu,Hang Xiao,Xi Chen
Nanomaterials have been treated as effective dopants for enhancing mechanical and ion-conductive properties of polymer membranes. Among various nanomaterials, metal–organic frameworks are attracting enormous attention from researchers because of their intriguing structural and functional properties. Here we report a gentle and simple synthesis method of ZIF-8 nanomaterials, which are applied as dopants for polyvinyl alcohol composite membranes. This nanomaterials display uniform size distribution and high purity through various structural investigations. The as-prepared polymer composite membranes present enhanced mechanical and ion-conductive properties compared to pristine samples. This work provides a novel ideal on the design of nanomaterial dopants for high-performance polymer membranes.
研究领域:
材料科学
·
化学工程
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高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
He Limin,Wang Yangdong,Wang Can,Liu Zhicheng,Xie Zaiku
The hydrogenation of 4-carboxylbenzaldehyde over Pd catalysts is a crucial process during the production of pure terephthalic acid. Herein, ZIF-8 derived carbon materials (NC) with adjustable N types were synthesized and used as the supports of Pd catalysts. Pd supported on NC with 50.5% of pyridinic N exhibited best hydrogenation activity with a TOF value of 4.1 min−1. The microstructures of NC support and electronic structures of Pd in Pd/NC were investigated by techniques such as XRD, N2 physisorption, XPS, H2-O2 titration and TEM. The nitrogen species in CN surface not only can adjust chemical state and dispersion of Pd nanoparticles (NPs), but also promote the adsorption and activation capability of H2 molecular. Besides, the ratio of Pd0/Pd2+ and Pd dispersion were closely correlated with pyridinic nitrogen content. The improvement in hydrogenation activity and stability of Pd/CN catalyst in relative to Pd/C were ascribed to the synergistic effect of pyridinic nitrogen and active site Pd0.
研究领域:
催化化学
·
材料科学
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高影响因子
FOOD HYDROCOLLOIDS
·
2020
·
IF 7.053
Hao Yin,Chenxiao Wang,Jin Yue,Yun Deng,Shunshan Jiao,Yanyun Zhao,Jie Zhou,Ting Cao
Essential oils can be capsulated by cyclodextrin to enhance its thermal stability and preserve the bioactivity. In this study, 1,8-cineole was used as a guest molecule to prepare the cyclodextrin inclusion complexes (ICs). The formulation and processing parameters were optimized using the response surface methodology (RSM), and the optimal conditions were identified to be: 2.30 h of encapsulating time, 30.1 °C of encapsulating temperature and 0.99 of molar ratio of 1,8-cineole to HP-β-CD. The corresponding encapsulation efficiency and loading efficiency were 83.17% and 8.40%, respectively. The produced 1,8-cineole/HP-β-CD ICs was characterized by SEM, FTIR and TGA, and the results proved the enhanced thermal stability of IC. The release behavior and kinetics of IC was investigated and showed that at elevated temperature and relative humidity, the releasing rate of 1,8-cineole from the ICs increased and followed the Fick's law.
研究领域:
药剂学
·
食品科学
·
化学工程
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Zilong Zeng,Guoliang Liu,Jiafeng Geng,Dengwei Jing,Xinlin Hong,Liejin Guo
Methanol steam reforming (MSR) is deemed to be an effective way for hydrogen production and Pd/ZnO catalyst were found to exhibit high activity in this reaction. However, their activities are strongly related to the preparations methods. In most cases, these catalysts are synthesized by impregnation or co-precipitation methods, aiming to change the dispersion and stability of Pd nanoparticle to get better performance. Here we report an efficient Pd/ZnO catalyst that was synthesized with zeolitic imidazolate framework-8 (ZIF-8) as the precursor, on which Pd ions was supported after NaHB 4 reduction. Typically, when the catalyst reduced at 300 °C for 2 h, the methanol conversion could reach 97–98% and the CO 2 selectivity is around 86.3% under the reaction condition of 0.1 MPa, water/CH 3 OH = 1.2:1 (mol ratio), WHSV methanol = 43152ml/g cat *h, catalyst = 0.1 g, our catalyst was found to show much better performance than other Pd@ZnO catalysts prepared by other methods, especially in terms of selectivity which is particularly important for hydrogen fuel cell application considering that Pt electrode could be poisoned by even trace amount of CO. It turned out that the large surface area , enough holes, evenly distributed PdZn alloy activity sites and abundant oxygen vacancies lead to the overall excellent performance of our catalyst.
研究领域:
催化化学
·
材料科学
·
能源化学
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高影响因子
危险品化学品经营许可证（带存储）