MICROCHEMICAL JOURNAL
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2011
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IF 2.48
Yunchang Fan,Sheli Zhang,Jichuan Kong,Juan Miao
In this work, the interaction of an ionic liquid (IL) 1-octyl-3-methylimidazolium chloride ([Omim]Cl) and L -tryptophan was investigated with fluorescence spectroscopic method. The quenching mechanism and binding characteristics of [Omim]Cl with L -tryptophan at different temperatures were studied from fluorescence measurement. The thermodynamic parameters such as free energy change (Δ G ), enthalpy change (Δ H ) and entropy change (Δ S ), were calculated by thermodynamic equations. The experimental results indicated that [Omim]Cl and L -tryptophan had weak interaction and the mechanism of quenching belonged to static quenching. Hydrogen bonds and van der Waals interactions played important roles in the binding of [Omim]Cl with L -tryptophan.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Siying Che,Linlin Yin,Yao Fan,Qijia Shou,Chunsong Zhou,Haiyan Fu,Yuanbin She
As a brand probe material, functional ionic liquids (ILs) have already been successfully employed in the detections of many targets, however, few of them focused on the real-time visual monitoring of trace Hg 2+ , one of the most representative heavy metal ions . Herein, we report a novel ratio fluorescent sensor using facile mixture of [RDB] [P 66614 ] IL and 7-hydroxycoumarin (HDC) for the on-site monitoring of Hg 2+ ignoring background interferences. To utilize and enhance the affinity characteristics of rhodamine B for Hg 2+ , it was first covalently linked onto the anion of IL and further mixed with HDC to construct a novel ratio fluorescent sensor for the achievement of self-calibration. Furthermore, this novel sensor showed a rapid and obvious color rendering performance from light white to opera pink even towards trace mercury(Ⅱ) in the range of 0.1–50 nM and could be further used even in common real samples such as waste water , urine, human plasma et. al. Most importantly, the sensor could be assembled into a paper sensor for the on-site visual monitoring of trace Hg 2+ ranging from 10 to 400 nM only taking 2 s, which enable to meet requirements for mercury(Ⅱ) limitations of WHO (30 nM) and EPA (10 nM).
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CARBON
·
2025
·
IF 11.6
Bo Dai,Qian Jia,Bingbing Lai,Xiaoyu Wang,Lizan Wang,Haichao Liu,Wenjing Lou,Xiaobo Wang
To address electrical erosion in rolling bearings of the motor systems of electrical vehicles, this study presents an in situ functionalization of graphene oxide (GO) with an amino-functionalized ionic liquid, [Bmim]PF 6 , resulting in a reduced graphene oxide–ionic liquid composite (rGOIL) with excellent electrical conductivity and outstanding friction-reducing and anti-wear performances. A series of conductive urea-based greases are formulated by optimizing the rGOIL content. The structure and morphology of rGOIL are characterized by FTIR, XRD, Raman spectroscopy, SEM, TEM, and XPS. Tribological tests using an SRV tribometer and electrical erosion evaluation on a bearing test rig show that grease containing 0.5 wt% rGOIL maintains a low and stable friction coefficient (0.102) under a 200 N load at 50 °C, with a 93 % reduction in wear volume compared to conventional polyurea grease. In electrical erosion tests, the bearing vibration amplitude stabilizes at 1.1 mm/s 2 , only 15 % of that measured for the reference grease. XPS and TEM analyses reveal the formation of a tribochemical film consisting of graphene nanosheets, ionically bonded liquid layers, and metal fluorides and phosphates. This film forms a conductive lubrication layer through a synergistic "lubrication–conductivity–lubrication" mechanism, effectively mitigating electrical erosion and enhancing bearing durability.
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Science Bulletin
·
2020
·
IF 9.511
Yuhan Li,Yuankun Wang,Yuchuan Shi,Hu Wu,Jiacheng Zeng,Huaitian Bu,Min Zhu,Chunhui Xiao,Yanfeng Zhang,Guoxin Gao,Shujiang Ding
The application of lithium metal anode with high specific capacity and energy density is limited by the volume expansion and pulverization caused by dendrite growth during cycle process. We propose a composite lithium anode by immersing molten lithium on the flexible three-dimensional (3D) carbon cloth scaffold with the zinc nanoparticles. The lithiophilic zinc nanoparticles layer of framework is synthesized by fast and easy electrochemical deposition from ionic liquid avoiding high temperature, high pressure and toxic reagent. The lithium is infused into the 3D lithiophilic framework, the composite anode is obtained. The steady network structure can confine the lithium and lead to Li dendrite restraining and reducing volume change due to the low interfacial resistance and reduce the effective current density, which induced the homogeneous Li growth. Benefiting from this, the Li infused 3D carbon cloth-Zn symmetric battery exhibits a low stripping/plating overpotential (~30 mV) and can be stable over 900 h at 1 mA cm −2 . The Li//LiFePO 4 battery delivers higher reversible capacity (140 mAh g −1 at 2 C and 120 mAh g −1 at 5 C) and stable cycling for 1500 and 2000 cycles than bare Li.
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PubMed
高影响因子
Analytical Methods
·
2014
·Vol. 6
·期 20
·8358-8367
·
IF 1.938
Jing Chen,Yuzhi Wang,Xueqin Ding,Yanhua Huang,Kaijia Xu
Hydroxy functional ionic liquids have been first designed and modified on the surface of silica-coated magnetic Fe3O4 nanoparticles (MNPs) for the investigation of the extraction performance of proteins by magnetic solid-phase extraction (MSPE) and characterized by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). BSA was chosen as a model protein to investigate the effect of extraction parameters. Based on the single-factor experiment, an initial serial investigative test was used to identify the optimal conditions of the extraction, and the extraction efficiency could reach up to 86.92%. The RSD of extraction efficiencies in the precision, repeatability and stability experiments were 1.17% (n = 3), 3.79% (n = 3) and 4.82% (n = 3), respectively. Compared with the other four types of ionic liquids, hydroxy functional ionic liquids-modified magnetic nanoparticles have the highest extraction rates. The desorption of proteins was up to 94.91% when the concentrations of NaCl were greater than 1.1 mol L−1. Nearly 95% of MNPs could be recovered from each run, and extraction rates decreased significantly after five runs.
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Solar RRL
·
2024
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IF 6
Xueni Shang,Zijie He,Jike Ding,Mengjia Li,Zuolin Zhang,Fanbin Meng,Cong Chen
In the rapidly developing field of photovoltaics, organic-inorganic metal halide perovskites are outstanding for their exceptional power conversion efficiencies (PCE), exceeding 26%. However, the full potential of these materials is often undermined by the prevalence of defects within their structure and at the grain surfaces, leading to significant nonradiative recombination losses. To meet this critical challenge, our study introduces a novel strategy involving a pyrrolidinium derivative and tetrafluoroborate ionic liquid, specifically 2-pyrrolidin-1-ium-1-ethylammonium tetrafluoroborate (PyE(BF 4 ) 2 ), as an additive in the perovskite precursor. This approach aims to meticulously control crystallization processes and effectively passivate defects on the surface and grain boundaries of the perovskite. The formation of N-H…I-hydrogen bonds and strong ionic interactions, PyE(BF 4 ) 2 not only stabilizes the [PbI 6 ] 4− framework but also optimizes the valence band alignment with the hole transport layer. Empirical results demonstrate that perovskite solar cells (PSCs) modified with PyE(BF 4 ) 2 have achieved a notable PCE of 23.80% and remarkable stability exceeding 1300 hours under standard testing protocols (ISOS-V-1) through vacuum flash evaporation. Our findings emphasize the transformative potential of multifunctional ionic liquids in enhancing the performance and durability of perovskite-based photovoltaic devices, marking a significant step forward in pursuing sustainable and efficient solar energy solutions. This article is protected by copyright. All rights reserved.
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Carbon Capture Science & Technology
·
2024
·
IF 10.4
Ming Jiang,Xintong Zhang,Mi Feng,Shijie Wang,Zhencai Zhang,Xiangping Zhang,Xingmei Lu,Fei Xu
Using CO 2 -derived dimethyl carbonate (DMC) instead of diphenyl carbonate (DPC) as a carbonyl source for synthesizing bio-based polycarbonates is a green and cost-effective route. However, the synthesis of high-performance polycarbonates via the DMC route remains challenging due to the poor reactivity and selectivity of DMC compared to DPC. Herein, we designed a series of highly active protic ionic liquid (PIL) catalysts for the synthesis of poly(isosorbide carbonate) (PIC) from DMC with ISB. The influences of the structures of anion and cation on the catalytic activity of PILs were systematically studied. Compared with the reported aprotic IL catalysts, the unique reactive hydrogen of the cation in PILs could form a strong hydrogen bond interaction with the carbonyl group of DMC, resulting in higher reactivity of the carbonyl carbon of DMC. Moreover, the nucleophilicity of the anion could be easily tuned by adjusting the p K a value, which effectively realized the balance of the reactivity difference between exo -OH and endo -OH in ISB. Among them, [DBUH][Im] showed the highest catalytic activity, and the weight-average molecular weight ( M w ) and glass transition temperature of PIC reached 55,700 g/mol and 160 °C, respectively. Combined with NMR analyses and DFT calculations, the mechanism that exhibited the synergetic catalytic effect of anion-cation for the polymerization of DMC and ISB was presented.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yuwei Yan,Hongyan Li,Songnan Li,Jiawei Zhang,Jingxiang Zhao,Qinghai Cai
PdCl 2 -FeCl 3 -imidazolium ionic liquid immobilized SBA-15 (SIL-PdFe) was prepared via chloropropyltriethoxysilane grafting with the surface Si-OH and N-methyl imidazole with C-Cl bond, followed by PdCl 2 and FeCl 3 coordinating to imidazolium ring. The SIL-PdFe was used as a heterogeneous catalyst for solvent-free Wacker oxidation of styrene with H 2 O 2 oxidant, exhibiting high catalytic performance with styrene conversion of 95.4% and 87.7 % selectivity (54.2% acetophenone and 33.5% benzaldehyde). The catalyst can be easily recovered and effectively reused without a significant loss in the activity and selectivity. The quenching experiments by adding tert -butanol (TBA), 1,4-benzoquinone (p-BQ) and furfural alcohol (FA) in the reaction system were conducted to identify kind of the reactive O species produced by the catalyst activating H 2 O 2 and the reaction mechanism of the Wacker oxidation was then proposed.
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CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2025
·
IF 3.9
Zuyun Luo,Jiahui Lin,Yangen Lv,Xinze Ye,Shucui Han
Ionic liquids serve as environmentally friendly alternatives to traditional catalysts for biodiesel production. In this work, the sulfonic acid-functionalized ionic liquid [TMG-PS][HSO 4 ] was synthesized via two steps and demonstrated high catalytic efficiency for esterification. The reaction process of myristic acid and methanol was optimized using single-factor experiments and response surface methodology. Specifically, [TMG-PS][HSO 4 ] achieved a high conversion rate of 97.53 % under the reaction conditions: temperature of only 42 °C, time of 5 h, catalyst dosage of 6.0 wt%, and molar ratio of methanol to myristic acid of 12:1. Remarkably, the catalyst displayed excellent stability for ten cycles. Moreover, [TMG-PS][HSO 4 ] also displayed generality and high catalytic activity in catalyzing the reactions of other free fatty acids (FFAs) with methanol to produce biodiesel. Therefore, these results demonstrate that [TMG-PS][HSO 4 ] has significant potential for biodiesel applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jihan Yang,Airong Li,Junping Guo,Zhihong Wang
The control of sulfur dioxide (SO 2 ) emissions from natural gas purification processes has become an urgent environmental priority due to increasing regulatory pressures and public concerns over air pollution. In this study, a series of 1-methylimidazolium-based ionic liquids ([MIM]-ILs) were synthesized and structurally characterized, followed by systematic evaluation of their SO 2 absorption capacities under simulated flue gas conditions (2000 ppm SO 2 ). Among them, [MIM]Lac showed the relatively better absorption performance, reaching a saturated capacity of 1.986 mol SO 2 per mol IL at a low concentration of 2000 ppm SO 2 . The regeneration experimental results demonstrated that [MIM]Lac achieved an optimal SO 2 removal efficiency of 99.71 % at 85 °C, indicating excellent thermal responsiveness. Even after 10 consecutive absorption-desorption cycles, [MIM]Lac retained 92.52 % of its initial absorption capacity, highlighting its outstanding cyclic stability and thermal durability. The insights based on FT-IR and 1 H NMR analyses revealed that SO 2 absorption by [MIM]Lac primarily involved the reversible chemical interactions between SO 2 and the lactate anion, particularly at the S O and S−O sites. This study provides a practical strategy for designing efficient SO 2 absorbents and the development of ionic liquid-based desulfurization systems.
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Journal of Physical Chemistry C
·
2025
·
IF 3.2
Jiayi Fu,Yuhang Wang,Zanyu Sun,Jun Zhu,Jinbo Zhu,Yongshuai Li,Ruoxin Li,Guangtao Chang
Prussian blue (PB) and its analogs have attracted attention in sodium-ion batteries due to their high theoretical capacity and good electrochemical stability. However, their crystal structure instability and low charge transfer efficiency limit their performance in high-rate and long-cycle applications. In this study, ionic liquid [EMIM][BF4] was introduced as a chelating agent to optimize the electrochemical properties of PB. Results show that an appropriate amount of [EMIM][BF4] significantly improves the crystallinity of PB, reduces crystal defects, enhances dispersion, and promotes the Fe3+/Fe2+ redox reaction via coordination, thereby improving the conductivity and charge transfer efficiency of the electrode material. Electrochemical tests reveal that the PB-L5 sample maintains a high specific capacity and low charge transfer resistance at a high current density of 500 mA g–1, exhibiting excellent rate performance and cycling stability. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) further confirm the positive impact of [EMIM][BF4] on battery performance. Overall, this study presents a new strategy for enhancing the performance of Prussian blue electrode materials, demonstrating that appropriate ionic liquid modification can effectively improve electrochemical performance, offering potential applications in sodium-ion batteries and other energy storage systems.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2025
·
IF 2.6
Meng Fanyu,Cheng Kaichuang,Wang Chunyu,Chen Hongyun,Tian Qinghua,Zhang Wei
Self-healing polymer electrolytes are in high demand for enhancing the cycle stability and reliability of flexible and wearable electronics. Herein, a healable, nonflammable poly(ionic liquids) (PIL) electrolyte is fabricated. It is based on an imidazolium-type PIL copolymer that contains cross-linkers with a disulfide bond and hydrogen bond (SSH), ionic liquid, and lithium salt. The prepared SSH-PIL electrolytes display high ionic conductivity and outstanding self-healing capacity due to multiple dynamic interactions. The optimized SSH-PIL2 electrolyte films exhibit superior ionic conductivity (exceeding 10 –4 S cm −1 at 30 °C), a wide electrochemical stability window (5.2 V vs. Li/Li + ), and a high lithium-ion transference number (0.43). The assembled LiFePO 4 /SSH-PIL2/Li cell delivers a specific discharge capacity of 153.3 mAh g −1 at 0.1 C, and a capacity retention of 93.3% after 100 cycles. More significantly, the SSH-PIL2 electrolyte can quickly repair mechanical damage (within 20 min at 60 °C). The healing efficiency in terms of mechanical properties and specific discharge capacity is as high as 94.6% and 98.0%, respectively. This work presents a promising approach for developing reliable and safe electronic devices.
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高影响因子
危险品化学品经营许可证（带存储）