RSC Advances
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2018
·Vol. 8
·期 14
·7792-7799
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IF 2.936
Tao Xi,Lin Tang,Wentao Hao,Lulu Yao,Peng Cui
Blending an aromatic-selective ionic liquid (IL, namely 1-ethyl-3-methylimidazolium hexafluorophosphate, [emim][PF6]) with waterborne polyurethane (WPU) enabled us to obtain [emim][PF6]-modified waterborne polyurethane composite membranes. We characterized the structure and properties of the [emim][PF6]/WPU composite membranes by ATR-FTIR, DSC, UV, SEM, EDX, swelling tests, and pervaporation testing. Characterization of the change in the morphology of the membranes in response to the IL loading indicated that a preferential interaction between the IL and soft segments of WPU was induced by hydrogen bonding. This interaction inhibited a potential interaction with benzene (Bz), which initially lowered the permeability. However, at high IL loading, the IL incorporation became ineffective owing to macrophase separation, which caused an increase in the permeability, as indicated by the SEM results. Swelling testing of the [emim][PF6]/WPU composite membranes showed that the membranes exhibited preferential adsorption of Bz, and the swelling degree of the composite membranes in Bz solvent increased from 58% to 98% and remained almost constant in cyclohexane solvent as the IL content was increased. The [emim][PF6]/WPU composite membranes enhanced the separation selectivity of Bz/Cy for an IL loading < 10 wt%. The best separation factor was 8.4, and the total flux was 0.19 kg (m2 h)−1 (50 wt% Bz/Cy mixtures at 50 °C) at w([emim][PF6]) : w(WPU) = 10 : 100. In addition, the composite membrane exhibited excellent stability over long-term operation. These results demonstrated that the [emim][PF6]/WPU composite membranes could be effective for separation of Bz/Cy mixtures by the pervaporation method.
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ELECTROCHIMICA ACTA
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2018
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IF 5.116
Yimin Zhang,Youhai Cao,Dong Chen,Penglei Cui,Jun Yang
The use of Ionic Liquids (ILs) to enhance the electrocatalytic activity of metal nanoparticles has garnered sustained research interest. However, current strategies involving ionic liquids do not exploit their use and advantages in chemical synthesis of metal nanoparticles. Herein, we demonstrate a straightforward method, which combines the advantages of ILs in nanoparticle synthesis with the potentials of ILs in electrocatalysis , for the synthesis of Pd nanoclusters for electrochemical oxidation of formaldehyde. This method relies on the use of 1-(2′-aminoethyl)-3-methyl-imidazolum tetrafluoroborate ionic liquid as stabilizers to directly generate Pd nanoclusters with average sizes of 1.8 ± 0.3 nm in a reaction medium consisting of water and methanol at room temperature . The electrochemical measurements prove that the ionic liquid-assisted Pd nanoclusters have mass-normalized activity approximately 7 times than that of commercial Pd/C catalysts for the oxidation of formaldehyde.
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LANGMUIR
·
2024
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IF 3.7
Xinzi Wu,Jiawei Ruan,Lifang Chen,Zhiwen Qi
The development of aqueous absorbents for CO2 capture is significantly important to reduce global industrial gas emissions through high regeneration efficiency and low energy consumption. Herein, we newly designed and prepared a dihydroxylated ionic liquid (IL) bis(2-hydroxyethyl)dimethylammonium 1,2,4-triazole ([N1,1,2OH,2OH][TZ]) for highly efficient CO2 absorption through anion–cation cooperative interactions. A superior capacity of 1.33 mol of CO2 per mol of IL and excellent reversibility have been achieved by the introduction of dihydroxy sites on the ammonium-based Tz IL. 1H and 13C nuclear magnetic resonance, Fourier transform infrared, and quantum chemical calculations demonstrate bihydroxyl-cooperative absorption of CO2 via hydrogen bond interaction between the cation and anion of the IL. The theory calculation shows that IL displays a superlow reactive absorption enthalpy, favorable to the reversible CO2 absorption, which can maintain an initial absorption capacity of 98.5% with the cycle numbers of 100, implying the facile regeneration and superlow energy consumption. Thus, the functionalized ILs toward group cooperative gas absorption and excellent reversibility may open a door to designing new materials for enhancing CO2 absorption and utilization.
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APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Duo Zhang,Hairan Zhang,Nan Zheng,Jie Liu,Lei Wang,Zhizhou Li,Bo Tang,Xiaohui Ji,William W. Yu
Amphiphilic ionic liquids (ILs) with an imidazole head and two undecene tails (abbreviated as [MimV 11 , V 11 ]Br) were synthesized through alkylation reaction. They were utilized as lipoid monomers for constructing an isotropic catalytic degradation platform of azo dyes. The spherical structure of this IL-based liposome was reinforced by cross-linking polymerization of the olefin tails. The imidazole groups served as anchor points for attaching catalytic heteropolyanions (such as [PW 12 O 40 ] 3- , [PMo 12 O 40 ] 3- ) to the liposomal vehicle. Furthermore, the arrangement of these linkers on the liposome surface facilitated the trapping and enrichment of the catalytic species. Consequently, a series of isotropic catalysts decorated with heteropolyanions (poly[MimA 11 , A 11 ][heteropolyanions]) were prepared through anion exchange, where sufficiently exposed heteropolyanions maximized the catalytic degradation activity. The morphology, structure, and properties of the catalysts were confirmed using SEM, TEM, FTIR, XPS, UV–vis, and GC–MS. Experimental results found that poly[MimA 11 , A 11 ][PW 12 O 40 ] was the optimal catalyst, achieving a removal efficiency of 97.2% for methyl orange (MO) within 3 h. The intermediates involved in the reaction were analyzed to propose the degradation pathway of MO. Moreover, this kind of solid catalyst could be recovered by centrifugation, and its degradation efficiency remained above 91% even after five cycles. This research provides valuable insights for expanding the applications of IL-functionalized materials.
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GREEN CHEMISTRY
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2024
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IF 9.3
Yanhui Hu,Hua Yue,Shiqi Huang,Bingxi Song,Yuyuan Xing,Minmin Liu,Gongying Wang,Yanyan Diao,Suojiang Zhang
Paclitaxel (PTX) is a crucial medication employed in the treatment of various cancers, and its limited solubility has been a persistent clinical hurdle. Ionic liquids (ILs), considered as “green solvents”, possess remarkable attributes such as exceptional miscibility, tailorable properties, and versatility. These properties have ushered in a revolution in the realm of biomedicine, particularly in addressing the solubility challenges of poorly soluble drugs. In this work, low-toxicity diimidazolium based ILs were introduced into a PTX dissolution system for the first time. Compared to mono-imidazolium based ILs, diimidazolium based ILs exhibited lower in vitro cytotoxicity and the substitution of Cremophor EL (CrEL) with biocompatible [C10(MIM)2][Br]2 and water resulted in lower cytotoxicity at a certain concentration. Furthermore, [C10(MIM)2][Br]2 could effectively improve the solubility of PTX, and this enhancement was strongly correlated with the length of the carbon chain in the cation and the IL concentration. Significantly, the [C10(MIM)2][Br]2-based dissolution system demonstrated the capability to attain a PTX content that is on par with the widely used commercial drug Taxol. Besides, the [C10(MIM)2][Br]2–PTX complex displayed excellent physical stability for a long period of time, with no significant change of PTX concentration in the solution. Additionally, various interactions existed between [C10(MIM)2][Br]2 and PTX, encompassing hydrophobic interactions, π–π stacking, CH–π interactions, and hydrogen bonds. The results indicated that the diimidazolium based IL system showed promise as a biocompatible platform for the delivery of PTX.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jie Yin,Wendi Fu,Jinrui Zhang,Xinmiao Zhang,Wenxiang Qiu,Wei Jiang,Linhua Zhu,Hongping Li,Huaming Li
Porous ionic liquids have been highlighted with special interest for their desirable catalytic activity and extraction properties. Herein, bifunctional porous ionic liquids (denoted UiO-66-BAPILs) were synthesized by dispersing UiO-66 into a pyridinium-based Brønsted acidic ionic liquid ([BSPy][CF 3 SO 3 ]) for oxidative desulfurization. The permanent cavity of UiO-66 moiety in UiO-66-BAPILs was validated as well-preserved by the SO 2 uptake experiments and molecular size simulations. Under the optimum reaction conditions, the sulfur removal could reach up to 99.5% with hydrogen peroxide as the oxidant. Additionally, bifunctional UiO-66-BAPILs were deemed as both extractants and catalysts during the reaction. A possible mechanism has been proposed that UiO-66-BAPILs extract the aromatic sulfur compounds via π···π interactions and C-H···π interactions and meanwhile oxidize them with peroxysulfonic acids and •OH radicals. These findings will open up new avenues to facilitate the catalytic oxidation performance by constructing bifunctional Brønsted acidic porous ionic liquids.
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CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2012
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IF 0.941
Shi-Ping RU,Jian WU,Yi-Bin YING,Feng JI
An electrochemical method to continuously detect alkaline phosphatase (AP) was developed. Using home-made ionic liquid modified carbon nanotubes electrode (CNTs-ILE), on the basis of the characteristics of CNTs-ILE and the substrate p -nitrophenyl phosphate (PNPP) and product p -nitrophenol (PNP), the continuous detection of the process of AP enzymatic reaction with amperometry was achieved. The results indicated that the cyclic voltammetry feature of the CNTs-ILE was superior to conventional glassy carbon electrode, also a good anti-passivation characteristic was achieved for the detection of PNP. When the concentration of AP was in the range of 1.0 −100 U L −1 , the current showed a good linear relationship to the concentrations of AP. This method was quick to detect AP, and detection time was less than 20 min.
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ACS Applied Materials & Interfaces
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2025
·
IF 8.2
Bobo Cao,Weilu Ding,Linmeng Huo,Yumiao Lu,Yanlei Wang,Hongyan He
Balancing conductivity, adhesion, and environmental stability remains a central challenge for next-generation conductive adhesives. Here, we report a facile metal-doping strategy for poly(ionic liquid) (PIL) adhesives, embedding Li+, Na+, or Ag+ salts within an ionic-liquid–polymer network to simultaneously reinforce interfacial binding and optimize ion transport. Systematic synthesis, multiscale characterization, and molecular dynamics simulations reveal that metal coordination sites concentrate at the polymer–substrate interface, yielding record adhesion strength up to 9.15 MPa on stainless steel for PIL-[Ag]. Electrochemical impedance spectroscopy shows that Li+-doped PIL exhibits an ultralow charge-transfer resistance of 0.24 MΩ, 3 orders of magnitude lower than that of conventional PILs. These adhesives also offer tunable electromechanical properties, ∼88% optical transparency, and reliable low-temperature performance (−50 °C), making them ideal for flexible electronics, wearable sensors, and smart interface applications.
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Nano-Micro Letters
·
2024
·Vol. 16
·期 1
·1-15
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IF 31.6
Yang Jianmin,Chang Li,Zhang Xiqi,Cao Ziquan,Jiang Lei
We present a method that utilizes ionic liquid-enhanced nanomaterial assembly to fabricate highly stable and large-area MXene-silver nanowire electrodes with ordered layered structures.
This approach emphasizes the use of hydrophobic and nonvolatile ionic liquids, which form stable interfaces with water by reducing interface energy, preventing the sedimentation loss of nanomaterials during assembly.
The prepared electrodes not only exhibit excellent optoelectronic properties (9.4 Ω sq −1 sheet resistance and 93% transmittance), but also have exceptional antioxidant capacity.
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Frontiers in Bioengineering and Biotechnology
·
2025
·
IF 4.8
Yao Liu,Siyu Han,Panpan Gu,Bai Wang,Shiyan Tian,Xiaoxu Xu,Chunmei Yang,Shujun Liu,Jianshe Hu
Introduction: Modern wearable electronics demand materials that are simultaneously stretchable, conductive, and environmentally robust. Hydrogels meet some of these requirements but dehydrate or freeze easily. To overcome these limitations, we prepared a poly-ionic-liquid (PIL) ionogel that integrates high elasticity with stable ionic conductivity, aiming to enable reliable, skin-compatible strain and biopotential sensing.Methods: 1-Vinyl-3-butyl-imidazolium hexafluorophosphate and 1-butyl-3-methyl-imidazolium hexafluorophosphate were mixed at optimized mass ratios, followed by N,N’-methylenebis-acrylamide (cross-linker) and Irgacure-2959 (photoinitiator). The homogeneous precursor was UV-cured for 6 min to obtain a PIL ionogel (PIL-1 – PIL-4 series). Structural, thermal, mechanical, rheological, adhesive, and electrical characteristics were analysed by FT-IR, SEM, TGA/DSC, uniaxial tensile testing, rheometry, 90° peel tests, and real-time resistance measurements. Applications were evaluated by attaching the gel to human joints and by recording EMG/ECG signals.Results: The UV one-step process yielded a dense multi-cross-linked network that combined covalent and ionic interactions. The optimised sample (PIL-2) showed a fracture stress of ∼390 kPa with 320% elongation, sustaining a 500 g load without failure. It retained mass and softness after 30 days and adhered strongly (up to 90° peel strength >4 N) to glass, metals, and skin—even underwater. Electrical tests gave a gauge factor of 1.94 (0–100%), 3.98 (100–200%), and 4.04 (200–320%), with 400 ms response and 500 ms recovery. The gel monitored finger (30°/90°), wrist, and elbow motions reproducibly, functioned as a bioelectrode capturing stable EMG/ECG with clear PQRST waves, and reliably transmitted Morse code via hand gestures.Discussion: The solvent-free PIL ionogel couples mechanical toughness, wide-range elasticity, and stable ionic pathways, outperforming water-rich hydrogels in thermal/long-term stability. Its strong, humidity-tolerant adhesion eliminates extra fixatives, while rapid, high-gain strain transduction and low-impedance skin contact enable multimodal biosensing. These attributes position the material for next-generation flexible electronics, real-time health monitoring, and gesture-based human-machine interfaces.
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JOURNAL OF HAZARDOUS MATERIALS
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2011
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IF 3.723
Fa-tang Li,Cheng-guang Kou,Zhi-min Sun,Ying-juan Hao,Rui-hong Liu,Di-shun Zhao
A new C 5 H 9 NO·SnCl 2 coordinated ionic liquid (IL) was prepared by reacting N-methyl-pyrrolidone with anhydrous SnCl 2 . Desulfurization of dibenzothiophene (DBT) via extraction and oxidation with C 5 H 9 NO·SnCl 2 IL as extractant, H 2 O 2 and equal mol of CH 3 COOH as oxidants was investigated. The Nernst partition coefficients k N of C 5 H 9 NO·SnCl 2 IL for the DBT in n -octane was above 5.0, showing its excellent extraction ability. During the oxidative desulfurization process, the optimal molar ratio of H 2 O 2 /DBT was six. Sulfur removal of DBT in n -octane was 94.8% in 30 min at 30 °C under the conditions of H 2 O 2 /DBT molar ratio of six and V (IL):V (oil) = 1:3. Moreover, the sulfur removal increased with increasing temperature because of the high reaction rate constant, low viscosity, and high solubility of dibenzothiophene-sulfone in the IL. The kinetics of oxidative desulfurization of DBT was also investigated, and the apparent activation energy was found to be 32.5 kJ/mol. The IL could be recycled six times without a significant decrease in activity.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Heyang Liu,Shichen Zeng,Zhenyang Li,Da Zhang,Xu Liang,Hanze Ma,Jianyu Wang,Qianfeng Pan,Jinyue Wang,Jingqi Fu,Guangwei He,Zhongyi Jiang
Covalent organic framework (COF) materials exhibit considerable potential for membrane separation applications due to their long-range ordered pore structures, tunable pore chemical microenvironments, and excellent thermochemical stability. However, the intrinsic pore sizes of COF materials often exceed the kinetic diameters of target gas molecules, thereby limiting their efficacy in gas separation. In this study, we present a strategy for the functionalization of ionic COF nanosheets using ionic liquids. The immobilization of ionic liquids within the pores and interlayers of ionic COF nanosheets was accomplished through a straightforward physical blending method, which leverages the electrostatic interactions between the abundant charged groups from the ionic COF nanosheets and the ionic liquids. Subsequently, we prepared CO 2 separation membranes with a thickness of less than 100 nm. The resulting COF membranes demonstrated excellent separation performance with a CO 2 permeance of up to 1116 GPU and a CO 2 /N 2 selectivity of 20.3 as well as good stability. This study offers a simple and effective approach for developing high-performance COF membranes for carbon capture.
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