ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Heng Zhang,Chengyong Liu,Liping Zheng,Wenfang Feng,Zhibin Zhou,Jin Nie
New solid polymer electrolytes (SPEs) comprised of lithium bis(fluorosulfonyl) imide (Li[N(SO 2 F) 2 ], LiFSI) and polymeric ionic liquid (i.e., poly[ N , N -dimethyl- N -[2-(methacryloyloxy) ethyl]- N -[2-(2-methoxyethoxy) ethyl]ammonium] bis(fluorosulfonyl) imide, P[C 5 O 2 N MA,11 ]FSI) have been prepared and characterized. For comparison, the corresponding SPEs, lithium bis(trifluoromethylsulfonyl) imide (Li[N(SO 2 CF 3 ) 2 ], LiTFSI)/poly[ N , N -dimethyl- N -[2-(methacryloyloxy) ethyl]- N -[2-(2-methoxyethoxy) ethyl]ammonium] bis(trifluoromethylsulfonyl) imide (P[C 5 O 2 N MA,11 ]TFSI), are also prepared and characterized. Their physicochemical properties have been investigated in terms of phase transition behavior, ionic conductivity , lithium-ion transference number ( t Li + ), electrochemical stability, and with particular attention to the interfacial behavior between lithium electrode and SPEs. It has been demonstrated that the ionic conductivities of LiFSI/P[C 5 O 2 N MA,11 ]FSI electrolyte are higher than those of the corresponding TFSI-based one. The interface resistances of Li symmetric cell (Li metal | polymer electrolytes | Li metal) using LiFSI/P[C 5 O 2 N MA,11 ]FSI electrolyte are much lower than those using LiTFSI/P[C 5 O 2 N MA,11 ]TFSI electrolyte. These outstanding properties of the FSI-based electrolyte make it attractive as SPEs for Li battery .
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高影响因子
Materials
·
2021
·Vol. 14
·期 16
·4712
·
IF 3.623
Fan Hu,Jun Gao,Biao Zhang,Fugang Qi,Nie Zhao,Xiaoping Ouyang
In this work, a new composite material with excellent dynamic impact resistance and outstanding quasi-static mechanical properties was synthesized. The composite material is composed of a polyurethane elastomer and a novel nano-polymer. The nano-polymer was composed of silane coupling agent-modified alumina microspheres and functionalized ionic liquids by double bond polymerization. The universal testing machine and split Hopkinson pressure bar were used to characterize the compression behavior, strength and energy absorption of the composite materials under static and dynamic conditions. Additionally, the comprehensive mechanical properties of polyurethane elastomer with different nano-polymer loadings (0.5–2.5 wt.%) were studied. The results show that whether it was static compression or dynamic impact, the polyurethane elastomer with 1% nano-polymer had the best performance. For the composite material with the best properties, its compressive yield strength under the static compression was about 61.13% higher than that of the pure polyurethane elastomer, and its energy absorption of dynamic impacts was also increased by about 15.53%. Moreover, the shape memory effect was very good (shape recovery is approximately 95%), and the microscopic damage degree was relatively small. This shows that the composite material with the best properties can withstand high compression loads and high-speed impacts. The developed composite material is a promising one for materials science and engineering, especially for protection against compression and impacts.Keywords:impact resistance;ionic liquid;nano-Al2O3;polyurethane elastomer
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DOI
PubMed
高影响因子
ChemCatChem
·
2014
·Vol. 6
·期 12
·3328-3332
·
IF 5.044
Xuan Xu,Haoran Li,Yong Wang
Graphical Being picky: N-Doped carbon (CN- x ) derived from N-containing ionic-liquid precursors are used as Pd nanoparticle supports for the selective hydrogenation of phenol to cyclohexanone with high activity and selectivity under mild reaction conditions. The activities of the Pd@CN- x catalysts derived from a variety of ionic liquids are different, and studies on the physical properties, Pd status, and N species of the catalysts are performed. In this report, a kind of mesoporous N-doped carbon (CN- x ) derived from N-containing ionic-liquid (IL) precursors were synthesized, and Pd@CN- x prepared by a simple ultrasound-assisted method showed higher catalytic activity for the selective hydrogenation of phenol and its derivatives under mild reaction conditions in water than commercial Pd@C and other common Pd heterogeneous catalysts. The catalytic activities of Pd@CN- x derived from different ILs were different, and further study into the influencing factors, including physical properties, N species of CN- x , and Pd status of Pd@CN- x , were performed.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaoqing Ming,Jiaying Du,Changgeng Zhang,Miaomiao Zhou,Guijuan Cheng,He Zhu,Qi Zhang,Shiping Zhu
Self-healing ionic conductors in all solid state without evaporation or leakage offers great potential for the next-generation soft ionotronics. However, it remains challenging to endow ionic conductors with all solid state while keeping their essential features. In this study, an intrinsically conducting polymer is developed as all-solid-state self-healing ionic conductors based on ion–dipole interactions within a fluorinated poly(ionic liquid) copolymer. This unique material possesses good self-healing ability at room temperature (96% of healing efficiency in 24 h), large strain (1800%), optical transparency (96%), and ionic conductivity (1.62 × 10–6 S/cm). The self-healing polymer itself is intrinsically conductive without any additives or fillers, thus it is almost free of evaporation or leaking issues of traditional conducting gels. An alternating-current electroluminescent device with self-healing performance is demonstrated. It is anticipated that this strategy would provide new opportunities for the development of novel self-healing ionotronics.
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DOI
PubMed
高影响因子
Journal of Analytical Methods in Chemistry
·
2018
·
IF 1.262
Luwei Fang,Minglei Tian,Xuemin Yan,Wei Xiao
A solid-phase extraction method was developed by using new bifunctional ionic liquid-based silicas as sorbents to isolate aflatoxin B1 from moldy corn and peanut. Firstly, according to the adsorption efficiency, two sorbents imidazolium chloride-butylimidazolium chloride-based silica (Sil@BIm-Im) and imidazolium chloride-hexylimidazolium chloride-based silica (Sil@HIm-Im) were selected. The RSM was introduced to optimize adsorption conditions such as methanol/water ratio, time, and pH. Sil@HIm-Im, which had the highest adsorption efficiency, was used in SPE as a sorbent. After 2.0 mL of loading samples, washing solvents were optimized as 6.0 mL and 4.0 mL of water for corn and peanut, 2.0 mL of acetonitrile, and 3.0 mL of methanol. 3.0 mL of methanol/acetic acid (2.0% vol.) was investigated as an elution solvent. Finally, 0.009 μg/g and 0.023 μg/g of aflatoxin B1 were obtained in corn and peanut extract with recoveries of 80.0%–103.3% and RSDs of 2.37%–6.58%.
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DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2015
·Vol. 38
·期 18
·3279-3287
·
IF 2.737
Ji Li,Xiaoling Hu,Ping Guan,Dongmen Song,Liwei Qian,Chunbao Du,Renyuan Song,Chaoli Wang
In this study, dummy imprinting technology was employed for the preparation of l- phenylalanine-imprinted microspheres. Ionic liquids were utilized as both a “dummy” template and functional monomer, and 4-vinylpyridine and ethylene glycol dimethacrylate were used as the assistant monomer and cross-linker, respectively, for preparing a surface-imprinted polymer on poly(divinylbenzene) microspheres. By the results obtained by theoretical investigation, the interaction between the template and monomer complex was improved as compared with that between the template and the traditional l- phenylalanine-imprinted polymer. The batch experiments indicated that the imprinting factor reached 2.5. Scatchard analysis demonstrated that the obtained “dummy” molecularly imprinted microspheres exhibited an affinity of 77.4 M·10 −4 , significantly higher that of a traditional polymer directly prepared by l- phenylalanine, which is in agreement with theoretical results. Competitive adsorption experiments also showed that the molecularly imprinted polymer with the dummy template effectively isolated l- phenylalanine from l- histidine and l- tryptophan with separation factors of 5.68 and 2.68, respectively. All these results demonstrated that the polymerizable ionic liquid as the dummy template could enhance the affinity and selectivity of molecularly imprinted polymer, thereby promoting the development of imprinting technology for biomolecules.
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高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2019
·Vol. 48
·期 2
·125-141
·
IF 1.039
Wei Ying,Zhang Wenbo,Zhang Xinyuan,Yang Huige,Zhang Qingguo
In the present work, a new binary mixture system composed of the ionic liquid 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([Emim][CF 3 SO 3 ]) and propylene carbonate (PC) was prepared. The densities, dynamic viscosities, and electrical conductivities of ([Emim][CF 3 SO 3 ] + PC) were measured over the whole concentration range (mole fractions of IL from 0 to 1) for temperatures from 288.15 to 353.15 K. The excess molar volumes ( V E ) and viscosity deviations (Δ η ) of the binary systems were calculated to characterize the volume contraction and intermolecular interactions in the mixture system, and both were correlated with the Redlich–Kister polynomial equation. The Vogel–Fulcher–Tamman equation was used to describe the temperature dependences of the dynamic viscosities and the electrical conductivities of the binary system. Further, density functional theory calculations were employed to obtain the structure, energy, and COSMO charge distributions of the cation and anion of the IL and the PC molecule, and the intermolecular interactions in the binary mixture system were evaluated.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 7
·3045-3051
·
IF 3.288
Junkang Guo,Yanping Li,Xinhao Ren,Huihui Xu,Ting Wei,Honglei Jia,Li Hua,Yi Zhang,Yongtao Li
A hydrophobic functional ionic liquid (IL) [N4444]AOT based on bis(2-ethylhexyl)sulfosuccinate anions was designed and synthesized for cadmium extraction. To study the characteristics of [N4444]AOT, Fourier transform infrared (FTIR) spectroscopy, hydrogen nuclear magnetic resonance spectroscopy (1H NMR), and thermogravimetric analysis were used. The extraction ability of [N4444]AOT towards Cd under ultrasonic conditions was also investigated. The results showed that more than 95.08% of Cd in a water solution could be extracted with [N4444]AOT under ultrasonic conditions. The results of FTIR and 1H NMR analyses showed that Cd mainly coordinated with the S–O bond provided by [N4444]AOT during extraction. The extraction of Cd from soil with [N4444]AOT was high and reached the value of 62.57%. Furthermore, [N4444]AOT could extract some stable and bound Cd species from the soil, which existed in a weakly acidic, reducible or oxidizable state. The application of [N4444]AOT significantly decreased the bioavailability of Cd in the soil. [N4444]AOT can be a good agent for Cd-contaminated soil remediation without changing the soil properties.
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高影响因子
CHROMATOGRAPHIA
·
2012
·Vol. 75
·期 23
·1421-1433
·
IF 1.195
Shu Jianjun,Li Chan,Liu Mingming,Liu Hanlan,Feng Xionghan,Tan Wenfeng,Liu Fan
Three alkoxyl-functionalized ionic liquids, 1-(3-triethoxysilyl propyl)-3-methyl imidazolium hexafluorophosphate (TESPMIM[PF 6 ]), 1-(3-triethoxysilyl propyl)-3-methyl imidazolium tetrafluoroborate (TESPMIM[BF 4 ]), and 1-(3-triethoxysilyl propyl)-3-methyl imidazolium bis(trifluoromethanesulfonyl)imide (TESPMIM[N(SO 2 CF 3 ) 2 ]), were synthesized and used as selective coating materials to prepare chemically bonded ionic-liquid-based organic–inorganic hybrid solid-phase microextraction (SPME) fibers by sol–gel technology. A possible mechanism of the sol–gel process is proposed, and the successful binding of ionic liquids to the formed silica substrate was confirmed by Fourier-transform infrared spectroscopy (FT-IR). These ionic-liquid-based sol–gel coatings have porous surface structure, high thermal stability, strong solvent resistance, wide pH application range, good coating preparation reproducibility, special selectivity, and extraction efficiency for both polar and nonpolar compounds, such as phenolic environmental estrogens, fatty acids, aromatic amines, alcohols, phthalate esters, and polycyclic aromatic hydrocarbons. The TESPMIM[PF 6 ]- and TESPMIM[BF 4 ]-coated fibers have much lower thermal stability (to 300 and 285 °C, respectively) than TESPMIM[N(SO 2 CF 3 ) 2 ]-coated fiber (to 454 °C). However, the selectivity of these two fibers is higher towards strong polar analytes, while lower towards medium polar or nonpolar analytes compared with TESPMIM[N(SO 2 CF 3 ) 2 ]-based fiber. This could be explained by the fact that different counteranions in ionic liquid structures have different steric hindrance, nucleophilicity, hydrophobicity, and ability to form hydrogen bonds, resulting in significant difference in the characteristics of the ionic-liquid-based SPME fibers, such as the surface morphology, thermal stability, selective extraction ability, etc. This work demonstrates that the performance of the ionic-liquid-based coatings can be simply tuned by changing the counteranions incorporated into the ionic liquid structures.
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高影响因子
International Journal of Minerals Metallurgy and Materials
·
2018
·Vol. 25
·期 9
·1027-1034
·
IF 1.261
Wang Le-ping,Chen Gang,Shen Qi-xin,Li Guo-min,Guan Shi-you,Li Bing
SnCo alloy nanowires were successfully electrodeposited from SnCl 2 −CoCl 2 −1-ethyl-3-methylimidazolium chloride (EMIC) ionic liquid without a template. The nanowires were obtained from the molar ratio of 5:40:60 for SnCl 2 :CoCl 2 :EMIC at −0.55 V and showed a minimum diameter of about 50 nm and lengths of over 20 μm. The as-fabricated SnCo nanowires were about 70 nm in diameter and featured a Sn/Co weight ratio of 3.85:1, when used as an anode for a Li-ion battery, they presented respective specific capacities of 687 and 678 mAh·g −1 after the first charge and discharge cycle and maintained capacities of about 654 mAh·g−1 after 60 cycles and 539 mAh·g −1 after 80 cycles at a current density of 300 mA·g −1 . Both the nanowire structure and presence of elemental Co helped buffer large volume changes in the Sn anode during charging and discharging to a certain extent, thereby improving the cycling performance of the Sn anode.
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高影响因子
FUEL
·
2024
·
IF 6.7
Yongxin Ding,Jun Lin,Panjie Yu,Hongwei Zhang,Yongde Ma,Zhenping Cai,Yanning Cao,Kuan Huang,Lilong Jiang
The design of novel practical catalysts is critical for the blossoming of biodiesel green-energy, in which Mo-based catalysts are of particular interest. In this work, an in-situ synthesis method was proposed to obtain a combo Mo-based ionic liquid and SAPO-11 catalyst. The catalyst presents both highly dispersed MoS 2 as hydrodeoxygenation active sites and acidic sites for isomerization. MoS 2 with a few fine layers can be identified based on TEM images and the Brønsted acid sites are dominant based on Pyridine-IR analysis. A great performance of MoS 2 /C 8 min-15 %SA can be obtained under optimized reaction conditions with 100 % conversion of methyl palmitate, 75.0 mol% hydrodeoxygenation to n -C 15 -C 16 , and 20.5 mol % isomerization to i -C 15 -C 16 . The structure and activity of the catalyst can be retained at least for 4 cycles. Thin layers and high sulfurization, large amount of Brønsted acid sites, and suitable reaction conditions are key points to achieve a significant performance and avoid over cracking and deactivation. On basis of detected intermediates and kinetic data simulations, a complex reaction pathway was proposed and the specific k values for each elementary reaction were provided for the hydrodeoxygenation and isomerization of methyl palmitate.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yicheng Zhou,Yang Liu,Chunyu Shen,Cuili Li,Bingquan Duan,Xinglong Wang,Ying Yang,Jianwei Tang,Yong Liu,Pengfei Liu,Bo Shen,Junxiang Ding,Baoming Wang
Nano‑magnesium hydroxide (MH), an environmentally friendly inorganic material, is widely used in flame retardancy, adsorption, and nanocomposites. However, precise control of its nanostructure and crystallization kinetics during synthesis remains a key challenge. This study aims to unveil the ionic liquid-mediated MH crystallization mechanism. MH was prepared via homogeneous precipitation using NaOH and MgSO₄·7H₂O as raw materials, with two 1-butyl-3-methylimidazolium-based ILs (ILA, ILB) as regulators. Via a synergistic approach of crystallization kinetics analysis and density functional theory (DFT) simulation, this study elucidated how ionic liquids (ILs) regulate MH nucleation and growth. Real-time conductivity monitoring tracked Mg 2+ dynamics, and the effects of temperature, reactant concentration, and IL type on MH crystallization kinetics were studied. DFT calculations optimized the precursor complexes (MgSO₄-ILA/ILB), while electrostatic potential (ESP) and atom-in-molecule (AIM) analyses resolved the coordination between anions and Mg 2+ as well as the regulatory mechanism of nucleophilic attack. Experiments show that under appropriate temperatures, ILs inhibit nucleation and induce smaller particles, with ILB more effective in growth control. ESP and frontier orbital analyses reveal IL cations affect growth kinetics and particle size through hydrogen bond-mediated nucleophilic attack direction and steric effects. This work reveals IL anions control MH crystallization via synergistic electrostatic, coordination, and steric effects, offering a framework for IL-based MH nanostructure customization.
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