JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 4
·1235-1252
·
IF 3.5
Wang Jianjun,Chen Jiaqi,Li Dongning,Liu Jiao,Shi Zhichun,Xu Liang,Zang Yu
The rapid development of industrialization generated an urgent requirement for the catalytic conversion of CO 2 into high-value-added chemical products. Herein, a class of novel bifunctional metalloporphyrin-based hyper-crosslinked ionic polymer (ImHCP-Co) was synthesized via one-pot Friedel–Crafts alkylation and quaternization reactions. The obtained bifunctional ImHCP-Co showed a high BET surface area and sufficient CO 2 adsorption capacity. Relying on the synergistic effect of the electrophilic and nucleophilic functionalities, the as-prepared ImHCP-Co showed an excellent performance in CO 2 cycloaddition using epichlorohydrin as the substrate (99% conversion and 99% selectivity) and can be carried out without any solvents or cocatalysts to afford a high turnover number. Importantly, it could also convert various epoxide substrates into the corresponding cyclic carbonates and can maintain 82.5% of its catalytic ability after 5 cycles. The catalytic mechanism was systematically explained by DFT calculation and proved the cooperative effect of Co 2+ centers and nucleophilic Cl − in the catalytic process. This study provides a new avenue for the design and preparation of HCP-based multifunctional catalysts used for the treatment of greenhouse gases. Graphical abstract
研究领域:
催化
·
高分子化学
·
环境化学
·
材料科学
·
绿色化学
✓ 已验证
DOI
高影响因子
Frontiers in Nutrition
·
2022
·
IF 6.59
Yajia Li,Qiangxiang Li,Ziqin Cao,Jianhuang Wu
Objectives: Previous studies have reported a potential association of polyunsaturated fatty acids (PUFAs) levels with allergic disease risk and the possible benefit of PUFAs supplementation on allergic disease prevention. This study was performed to estimate the genetic association between PUFAs and allergic diseases using the method of both univariable and multivariable two-sample Mendelian randomization (MR).Methods: As indicators of the PUFAs levels, we included the omega-3, omega-6, docosahexaenoic acid (DHA), eicosapentaenoic acid (EPA), linoleic acid (LA), and the ratio of omega-6 to omega-3 (omega-6:3). Summarized statistics of genome-wide association studies (GWASs) for these PUFAs were obtained from the United Kingdom Biobank and the Twins United Kingdom cohort. Genetic data relating to allergic diseases, including atopic dermatitis (AD), allergic rhinitis (AR), allergic conjunctivitis (AC), allergic urticaria (AU) and asthma, were accessed from the FinnGen biobank analysis. Odds ratios and 95% CIs were used to express the impact.Results: The MR results denoted a genetic association between the genetically determined increase in omega-3 levels and the decreased risk of some allergic diseases including AD (OR: 0.863; 95% CI: 0.785 to 0.949; p = 3.86E-03), AC (OR:0.720; 95% CI: 0.547 to 0.947; p = 1.87E-02) and AU (OR:0.821; 95% CI: 0.684 to 0.985; p = 3.42E-02), while omega-6 and DHA level was only found to have negatively correlation with risk of AC with ORs of 0.655 (95% CI: 0.445 to 0.964; p = 3.18E-02) and 0.671 (95% CI 0.490 to 0.918; p = 1.25E-02), respectively. Omega-6:3 were causally significantly associated with the increased risk of AD (OR:1.171; 95% CI: 1.045 to 1.312; p = 6.46E-03) and AC (IVW: OR:1.341; 95% CI: 1.032 to 1.743; p = 2.83E-02). After adjustment of age, economic level, BMI, smoking and alcohol behaviors in the multivariable MR analysis, a direct causal protective effect of omega-3 on AD and AC, as well as a direct causal association between DHA and AD were observed. Omega-6:3 was also found to be directly associated with an increased risk of AD and AC. No association was found of EPA or LA with allergic diseases.Conclusion: Higher PUFA concentrations (omega-3, omega-6, DHA) and lower omega-6:3 ratios were genetically associated with a lower risk of some allergic diseases.
研究领域:
免疫学
·
营养流行病学
·
遗传流行病学
·
过敏反应
·
公共卫生
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Jie Li,Xingxing Zhao,Zhian Zhang,Yanqing Lai
A hollow carbonized polyaniline spheres/selenium (HCPS/Se) composite was prepared by a simple combination method of a self-assembly method, pyrolysis and vapor phase infusion process as a cathode material for Li–Se rechargeable batteries. The composites were characterized and examined by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, the X-ray photoelectron spectroscopy and electrochemical methods, such as cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge/discharge tests. The HCPS/Se composite cathode can deliver relative high capacity, high Coulombic efficiency and good cycling performance. The electrochemical results show that the HCPS/Se composite cathode exhibits an initial discharge specific capacity of 571.5 mA h g −1 and retains 298.7 mA h g −1 with high Coulombic efficiency after 100 cycles at a high rate of 0.5 C (337.5 mA h g −1 ), which are higher than that of the pristine selenium cathode. The excellent electrochemical properties benefit from the high conductivity and the hollow structures of the carbonized polyaniline spheres.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Quan Xu,Shuxian Chen,Jingkun Xu,Xuemin Duan,Limin Lu,Qingyun Tian,Xinxin Zhang,Yue Cai,Xinyu Lu,Liangmei Rao,Yongfang Yu
Luteolin (LUT) is one of the biologically active functional components, which was widely used in pharmacological applications. Thus, development of sensitive analytical methods for LUT determination is highly desired. In this work, Ti 3 C 2 -MXene/ZIF-67/CNTs heterostructure was exploited as a new electrochemical sensing platform for the sensitive determination of LUT. For the design of composite, the in-situ growth of ZIF-67 on CNTs surface ensures the stability of their binding and enhances the synergetic catalysis. Conductive MXene as matrix for the loading of ZIF-67/CNTs can promote the catalytic ability of composite. Electrochemical results show that the MXene/ZIF-67/CNTs modified electrode displays preeminent electrocatalytic activity and enhances electrochemical response to the redox reaction of LUT, ascribing to the synergistic effect of ZIF-67/CNTs and MXene. Upon the optimization of experimental parameters, e.g., pH, enrichment time, the sensor based on MXene/ZIF-67/CNTs composite exhibits excellent performance with wide linear relationship ranging from 0.1–1000 nM and a low limit of detection (LOD) of 0.03 nM (S/N = 3). Besides, MXene/ZIF-67/CNTs electrode performs high selectivity, stability, and acceptable reproducibility. Furthermore, the constructed sensor was successfully utilized to detect LUT in real samples with satisfactory recovery.
研究领域:
分析化学
·
纳米生物技术
·
电分析化学
·
药物分析
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Shiyu Hou,Yiliang Tang,Tianle Zhu,Zheng-Hong Huang,Yingshu Liu,Ye Sun,Xiang Li,Fangxia Shen
Adsorptive removal of gas phase low concentration macromolecular organic component, represented by naphthalene , from the enclosed space using ordered mesoporous carbon (OMC) has been studied by molecular simulation and experimental investigation. The simulation results indicated that both adsorption capacity and adsorption stability of the OMCs for naphthalene decreased with the increase of pore sizes from 2 nm to 8 nm. Characterizations showed that the prepared OMCs had the pore structure similar to the simulated OMCs except for the rough surface. In particular, the adsorption performance of the prepared OMCs was significantly lower than that of the simulated OMCs when pore size was 2 nm and 3 nm, which was attributed to the rough inner surface of these adsorbents, blocking the narrow pore channels and significantly reducing the pore volume . OMC with pore size of 4 nm had the highest adsorption amount for naphthalene. The co-adsorption experiments in the presence of both naphthalene and toluene, acetone or water showed the adsorption performance of OMCs for naphthalene were almost unaffected by the presence of low concentration toluene and acetone, as well as high relative humidity.
研究领域:
环境科学
·
吸附科学
·
材料科学
·
大气污染控制
·
物理化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 35
·19786-19790
·
IF 2.936
X. Y. Sun,M. J. Yuan,B. Liu,J. S. Shen
In this study, we constructed a new fluorescent sensing for VB12 and investigated the mechanism of vitamin B12 (VB12) quenching fluorescence of carbon dots (CDs). The fluorescence suppression is attributed to the inner filter effect (IFE) because of the overlap between UV-vis absorption spectrum of VB12 and emission/excitation spectra of CDs. This CDs-based sensor provides obvious advantages of simplicity, convenience, rapid response, high selectivity and sensitivity, which has potential application for the detection of VB12 in the medical and food industry.
研究领域:
分析化学
·
生物医学工程
·
纳米医学
·
食品科学
·
临床检验
✓ 已验证
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 3
·1373-1381
·
IF 2.4
Liu Xun,Xiong Kaiyang,Yuan Haoxiang,Zhao Junfeng
Herein, the well-designed hybrid materials composed of Fe 2 O 3 nanoparticles embedded in hierarchical porous carbon matrix (HPCs/Fe 2 O 3 ) were prepared by a two-step approach, involving a salt template route followed by hydrothermal treatment. The hierarchical porous structure not only serves as a buffer matrix to alleviate the volume expansion of Fe 2 O 3 nanoparticles, but also provides a large surface area and high electrical conductivity, resulting in significant improvement of electrochemical performance. HPCs/Fe 2 O 3 -2 anode delivers a high reversible capacity of 1357.60 mAh g −1 after 100 cycles at 0.2 A g −1 and an outstanding rate behavior. It also exhibits an excellent cycling-life stability of 472.3 mAh g −1 after 1000 cycles at a high current density of 5 A g −1 , suggesting its potential application in LIBs anode.
研究领域:
材料科学
·
电化学
·
储能
✓ 已验证
DOI
高影响因子
Journal of Nano Research
·
2015
·
IF 0.564
Lin Qi,Li Xin Song,Xin Fei Zhao,Chang Jiang Fang,Xing Ran Lin,Jie Xiong
Flexible alumina (Al2O3)/carbon (C) composite nanofibers film has been fabricated via electrospinning, followed by pre-oxidation and carbonization. Polyacrylonitrile (PAN)/Polyvinylpyrrolidone (PVP) and aluminum hydroxyacetate (Al(OH)C4H6O4) acted as carbon precursor and Al2O3 precursor, respectively. The obtained Al2O3/C nanofibers films were systematically characterized by field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier transform infrared spectra (FTIR), energy dispersive spectrometer (EDS), X-ray diffractometer (XRD) and flexural tests. The results indicated that Al2O3/C composite nanofibers with rough surface consisted of graphitic phase and γ-Al2O3 phase. The Al2O3 covering on the surface of nanofibers improved the flexibility of carbon nanofibers (CNFs) film. Moreover, with the amount of Al2O3 increasing, both flexural rigidity and flexural modulus of Al2O3/C nanofibers film decreased drastically. In the other words, the flexibility of CNFs film improved greatly. The Al2O3/C nanofibers film with the mass ratio of Al(OH)C4H6O4: PAN being 4:1 exhibited flexural modulus that was about 11 times lower than that of CNFs film without Al2O3, suggesting that the highly flexible Al2O3/C nanofibers film was obtained.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2013
·Vol. 17
·期 11
·2789-2794
·
IF 2.279
Lv Weixin,Zhang Rui,Gao Pengran,Gong Chunxia,Lei Lixu
The electrochemical reduction of carbon dioxide (CO 2 ) is investigated in acetonitrile with tetrabutylammonium perchlorate as an electrolyte using a lead cathode and a sacrificial zinc anode, and the product under such a setup is insoluble zinc oxalate at potentials between −2.2 and −2.8 V vs. Ag rod electrode. Preelectrolysis is an effective method to remove the water in the electrolyte, which makes a distinct reduction peak of CO 2 appear at −2.6 V vs. Ag on cyclic voltammogram. Even trace amounts of water in the electrolyte can interfere with the faradaic efficiency of reduction of CO 2 to oxalate, and the product could be β-ZnC 2 O 4 (in anhydrous solution) or ZnC 2 O 4 · 2H 2 O (if water exists). The faradaic efficiency for oxalate production also depends on the cathode potential and the temperature, and the maximum is 96.8 % at −2.6 V vs. Ag and 5 °C. This is the highest value of CO 2 electrochemical reduction found in the literature under ambient pressure.
研究领域:
电化学
·
环境科学
·
材料科学
·
能源化学
·
物理化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2015
·Vol. 19
·期 6
·1827-1831
·
IF 2.446
Hou Junke,Song Jie,Niu Yubin,Cheng Chuanjun,He Hong,Li Yutao,Xu Maowen
P2-type Na 0.67 Ni 0.33 Ti 0.67 O 2 is explored as a titanium-based anode material for sodium ion batteries. The as-prepared Na 0.67 Ni 0.33 Ti 0.67 O 2 delivers a reversible capacity of 129.2 mAh g −1 at 0.05 C with smooth charge–discharge curves. A simple carbon-coating technique was used to improve the electronic conductivity of Na 0.67 Ni 0.33 Ti 0.67 O 2 particles. The carbon-coated Na 0.67 Ni 0.33 Ti 0.67 O 2 delivers a higher reversible capacity of 163.7 mAh g −1 and exhibits better rate capability than the as-prepared Na 0.67 Ni 0.33 Ti 0.67 O 2 .
研究领域:
电化学储能
·
无机非金属材料
·
能源材料
·
功能陶瓷
·
二次电池技术
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2011
·Vol. 176
·期 3
·359-366
·
IF 2.578
Cui Yang,Hu Zhang-Jun,Yang Jia-Xiang,Gao Hong-Wen
We have covalently grafted phenyl-iminodiacetic acid groups onto multi-walled carbon nanotubes via a diazotation reaction. The resulting material was characterized by FT-IR and UV–vis spectroscopy, by TGA, XPS and SEM. It is shown to be a valuable solid-phase extraction adsorbent for the preconcentration of trace quantities of Fe(III), Cu(II) and Pb(II) ion from aqueous solution prior to their determination by ICP-OES. Various factors affectting the separation and preconcentration were investigated. The enrichment factor typically is 100. Under optimized experimental conditions, the maximum adsorption capacities for Fe(III), Cu(II) and Pb (II) are 64.5, 30.5 and 17.0 mg g-1, respectively, the detection limits are 0.26, 0.15 and 0.18 ng mL-1, and the relative standard deviations are <2.5% ( n = 6). The new adsorbent shows superior reusability and stability. The procedure was successfully applied to the determination of trace quantities of Fe(III), Cu(II) and Pb (II) in water samples.
Multiwalled carbon nanotubes grafted with phenyl-iminodiacetic acid (PIDA-MWCNTs) is prepared and employed as solid phase extraction sorbent to determinate the trace Fe(III), Cu(II) and Pb (II) in water samples. The method has been applied to the preconcentration of trace amount of Fe(III), Cu(II) and Pb (II) in water samples with satisfactory results.
研究领域:
环境化学
·
分析化学
·
材料科学
·
水污染监测
·
痕量金属检测
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 36
·5502-5509
·
IF 5.047
Yifang Gao,Yuan Jiao,Huilin Zhang,Wenjing Lu,Yang Liu,Hui Han,Xiaojuan Gong,Lei Li,Shaomin Shuang,Chuan Dong
Herein, an easy and effective ratiometric fluorescent nanoprobe for the selective detection of Pb2+ and pyrophosphate (PPi) was developed based on label-free carbon dots (CDs). The CDs showed dual emission bands at 477 and 651 nm under a single-wavelength excitation (391 nm). Pb2+ and PPi were sequentially detected by the sensor with high reliability and accuracy via the exploitation of the fluorescence intensity ratio (F477/F651). The dual emission sensor exhibited high selectivity and excellent sensitivity for Pb2+ and PPi than for other analytes with detection limits as low as 0.055 μM and 0.089 μM, respectively. Moreover, the fluorescent CDs changed from pink to cyan and from cyan to pink and could be used as a fluorescent paper sensor for the visual detection of Pb2+ and PPi. To the best of our knowledge, this is the first report on the ratiometric fluorescence detection of Pb2+ and PPi by CDs; therefore, the as-synthesized CDs show great potential for application in the determination of Pb2+ and PPi in real samples.
研究领域:
分析化学
·
生物传感
·
环境监测
·
材料科学
·
荧光探针
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）