Journal of Physical Chemistry C
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2011
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IF 4.524
Lijuan Shi,Na Li,Liqiang Zheng
The aggregation behavior of long-chain N-aryl imidazolium ionic liquids (ILs), 1-(2,4,6-trimethylphenyl)-3-alkylimidazolium bromide [Cnpim]Br (n = 10, 12, 14), was investigated in a room temperature IL, 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) by surface tension measurements. Freeze-fracture transmission electron microscopy (FF-TEM) and dynamic light scattering (DLS) measurements further verified that micelles are formed. A relatively lower critical micelle concentration (CMC) and smaller micelle size were observed compared with that of N-alkylimidazolium ILs [Cnmim]Br. The main reason for this phenomenon is that the electrostatic repulsion between the head groups of [Cnpim]Br is weakened due to the incorporation of the 2,4,6-trimethylphenyl group. The thermodynamic parameters of micelle formation of [Cnpim]Br in [bmim][BF4] were estimated from the CMC values and their temperature dependence. The micelle formation process is enthalpy-driven in the investigated temperature range, similar to the case in water. The novel N-aryl imidazolium ILs present strong fluorescence properties in [bmim][BF4], indicating their potential application in the field of photochemistry.
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JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Mingfa Ren,Hongling Fang,Lei Liu,Songwei Zhang,Qinglun Che,Litian Hu
Ionic liquids (ILs) are characterized by their exceptional friction reduction and anti-wear properties, especially those with simple structures and low melting points, which broaden their applicability. In this work, a low melting point binary ionic liquid was designed by simply blending two solid ILs together at room temperature, resulting in a new ionic liquid deep eutectic solvent (IL-IL DES). Molecular dynamics simulation provided further insights into the formation mechanisms of IL-IL DES by analyzing the interactions within the system. Tribological tests confirm that IL-IL DES with good oil-solubility significantly improve the lubrication performance of base oil when used as additive. Notably, the IL-IL DES phosphorus content in base oil was half that of its individual components, yet it maintained substantial friction reduction effect. Furthermore, IL-IL DES still maintains good lubrication performance in a wide temperature range (−20 °C to 150 °C), which can effectively meet the operational conditions of most mechanical components.
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FOOD CHEMISTRY
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2024
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IF 8.5
Yimei Wang,Yaoyao Zhang,Xing Qiao,Shangde Sun
Tyrosol is a natural phenolic compound with potent antioxidant properties in the field of food manufacturing. However, the low lipophilicity of tyrosol limited its application. Therefore, the construction of tyrosol laurate (Tyr-L) could effectively overcome the limitations of tyrosol. In this work, four ionic liquids (ILs) were applied for TYr-L preparation. Among them, the 1-butyl-3-methylimidazolium hydrogen sulfate ([Bmim]HSO 4 ) showed the best catalytic performance. The maximum TYr-L yield was achieved (94.24 ± 1.23 %) under the optimal conditions (reaction temperature 119 °C, substrate ratio 1:6.7, IL dosage 9.2 %, and reaction time 12 h). The kinetic and thermodynamic parameters were also evaluated and it was found that E a, Δ H , Δ S , and Δ G were 80.81 kJ·mol −1 , 77.63 kJ·mol −1 , −82.08 J·(mol·K) −1 , and 109.89 kJ·mol −1 , respectively. The acidic [Bmim]HSO 4 demonstrated excellent reusability and stability, even after 6 cycles. Furthermore, TYr-L showed superior ABTS radical scavenging ability, which could be further applied in various industrial processes.
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AICHE JOURNAL
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2025
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IF 4
Guokai Cui,Chengyu Ren,Ruina Zhang,Xing Li,Zhenzhen Yang,Lei Zhang,Quanli Ke,Ying Zhou,Hanfeng Lu,Sheng Dai
Carbon monoxide (CO) is a toxic but valuable precursor for organic synthesis. Thus, CO capture is an important and sustainable process. Here, a strategy of cuprous ionic liquid engineering combined with preorganized hydrogen-bond donors (HBDs) was first developed to form a series of functional deep eutectic solvents (DESs) for enhanced CO capture via promoting cooperation, and the stepped sorption isotherms with a characteristic threshold “gate-opening” pressure were obtained. It was found that the enhanced absorption capacity (up to 220%) and enhanced working capacity (up to 310%) can be reached by DESs with preorganized HBDs. Quantum-chemical calculations and spectroscopic investigations revealed that cooperative interactions and preorganized benzenediols were the reason for equimolar capacities. Additionally, at least 17 absorption–desorption cycles with high CO capacity could be reached, indicating excellent reversibility. Thus, easy preparation, high Cu(I) efficiency, and high working capacity make these DESs an alternative way for CO capture.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Qinghai Long,Yutao Bai,Anteng Dai,Huajie Qiu,Xuanang Fu,Xiaoyun Chen,Chao Liu,Waseem Hayat,Bihong Lv,Guohua Jing,Zuoming Zhou
In this study, 2-dibutylaminoethanol imidazole ([DBAE][Im]) was developed as a novel ionic liquid for energy-efficient CO₂ capture to address key challenges, such as high energy consumption and elevated regeneration temperatures, associated with conventional amine-based absorbents. The self-extractable behavior of [DBAE][Im] facilitated reversible liquid–liquid phase separation during CO₂ absorption and desorption. The CO 2 absorption loading of the [DBAE][Im] solution (0.5 mol·L −1 ) reached 0.82 mol·mol −1 at 313.15 K, and the regeneration efficiency remained high at 87 % even after five consecutive regeneration cycles at 371.15 K. The reaction and self-extraction mechanisms were determined using carbon nuclear magnetic resonance spectroscopy and quantum chemical calculations. These analyses revealed that the significant polarity difference and weak hydrogen bonding between [DBAE][Im] and water (H₂O) induced a phase transition before CO 2 absorption. During absorption, CO 2 reacted with [DBAE][Im] to form carbamate/bicarbonate (HCO₃ − /CO₃ 2− ) species, which resulted in a homogeneous solution due to the decreased polarity of CO₂ products and the strong hydrogen bonds formed between the products and H₂O. Following thermal desorption, [DBAE][Im] separated into the upper phase, restoring its high polarity and reducing intermolecular hydrogen bonding with H₂O. Owing to its self-extraction capability, the regeneration rate of [DBAE][Im] improved significantly at 371.15 K, while the regeneration heat duty was reduced by 47 % compared to monoethanolamine. The results demonstrate that the novel aqueous [DBAE][Im] absorbent offers substantial energy savings for CO₂ capture, presenting a promising approach for advancing carbon capture technologies.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Gangqiang Tang,Mingfei Jiang,Xin Zhao,Zhuoao Du,Dong Mei,Chun Zhao,Lijie Li,Yanjie Wang
Flexible sensors have broad application prospects in fields of medical electronics, environmental monitoring and wearable devices. Among them, ionic polymer sensors (IPS), with the sensing mechanism resembling biological processes, have drawn significant attention. Traditional Nafion-based IPS using water and alkali metal cations as electrolyte suffer from issues like performance degradation and signal instability water evaporation. Ionic liquids (ILs), as solvent-free electrolytes, hold promise in solving these problems. However, the impact of ILs on Nafion-based IPS performance remains unclear. In this paper, we investigated the influence of various parameters during the IL immersion process on IPS performance. By adjusting immersion temperature and time, different samples were prepared, whose mass change, stiffness, surface resistance and the electrochemical performance are studied. Furthermore, the influence of imidazolium type on sensing performance of IPS is also explored. Then an IL-based IPS sensor with optimal performance is obtained, the sensitivity of which was increased by 150 % and the sensing stability was greatly improved compared with the traditional water-based IPS. The application potential of the IL-based IPS in human motion monitoring was explored, including swallowing, speaking, mouse operation, pulse, knee joint movement and gait. The results of this work prove the effectiveness of obtaining high-performance Nafion-based IPS with IL as electrolyte through direct heating and immersion, and are expected to contribute to the rapid preparation of high-stability IPS.
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JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Jinjuan Zhao,Sizhuo Ma,Aoxue Zhang,Yuner Xu,Zheng Liu,Mengjie Li,Honglei Yang,Ruifa Jin,Shuwen Li
The hydrogen-bonding interaction among catalytic center, support material and ethanol molecule can establish an effective microenvironment for ethanol oxidation reaction (EOR). However, the surrounding of palladium nanocrystals (Pd NCs) lacks highly electronegative atoms to form hydrogen bonds with ethanol molecule. To effectively address the limitation, suitable molecules can be incorporated into Pd-based catalysts alongside the selection of an appropriate support. The pyrene tetracarboxylate ionic liquid (PTCIL), composed of pyrene tetracarboxylate anions and quaternary ammonium cations, provides abundant oxygen atoms capable of forming hydrogen bonds with ethanol molecules and the oxygen-containing functional groups in reduced graphene oxide (RGO) support, thereby creating a conducive microenvironment towards green EOR. Additionally, PTCIL can be anchored onto the RGO support via π-π stacking, yielding abundant dispersed carboxyl and pyrenyl groups that act as active sites to stabilize Pd NCs. Furthermore, synergistic interactions within the catalyst enable electron transfer from PTCIL to Pd, weakening the adsorption strength of toxic intermediates. Herein, the prepared Pd/PTCIL-RGO-2 exhibits improved electrocatalytic activity (1523.2 mA mg −1 , 5.29 mA cm −2 ) compared to commercial Pd/C (807.2 mA mg −1 , 4.14 mA cm −2 ). This study proposes a design for constructing Pd-based catalysts with tailored local microenvironments, exhibiting enhanced activity and robust durability for versatile applications, including EOR and other small molecule oxidation reactions.
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APPLIED THERMAL ENGINEERING
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2025
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IF 6.9
Yanjun Sun,Haiqi Zheng,Bohao Yin,Xiaopo Wang,Maogang He
With global energy consumption surging and environmental concerns escalating, absorption refrigeration systems are receiving increasing attention. This study investigates the absorption behavior and thermodynamic performance of absorption refrigeration systems using trans -1-chloro-3,3,3-trifluoro-1-propene (R-1233zd(E)) paired with phosphonium-based ionic liquids (ILs), trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl) amide ([P 66614 ][Tf 2 N]) and trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl) phosphinate ([P 66614 ][TMPP]). Experimental solubility measurements of R-1233zd(E) in the ILs were conducted using an isochoric saturation method across a temperature range of 293.15–343.15 K and pressures up to 0.61 MPa. The Non-Random Two-Liquid (NRTL) thermodynamic model was employed to correlate solubility data, yielding excellent agreement with deviations of less than 3.84 %. Results revealed that [P 66614 ][TMPP] exhibits higher solubility due to its branched alkyl chains, increased free volume, and favorable van der Waals interactions. Thermodynamic analyses were performed for single-effect (SARS), double-effect (DARS), and compression-assisted cycles (LC-SARS, single-effect cycle with a compressor added in the low-pressure side; HC-SARS, single-effect cycle with a compressor added in the high-pressure side; LC-DARS, double-effect cycle with a compressor added in the low-pressure side). It demonstrated that [P 66614 ][TMPP] exhibits a higher coefficient of performance (COP) compared to [P 66614 ][Tf 2 N]. Compression assistance reduced the minimum generation temperature and improved COP by leveraging electrical energy. Among all configurations, LC-DARS with a compression ratio of 1.9 demonstrated the optimal balance between COP (0.82) and thermal energy utilization efficiency. These findings highlight the potential of R-1233zd(E)/[P 66614 ][TMPP] as a sustainable working pair for absorption systems, particularly in low-grade heat recovery applications.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Zongxi Zhang,Xiaoying Guo,Hui Cao,Jiancheng Zhao,Yingxiong Wang,Shuai Chen,Yan Qiao
The key issue in electricity-drive 5-Hydroxymethylfurfural oxidation reaction (HMFOR) is to accelerate the electrochemical protons deintercalation process of catalyst for reducing the reaction potential and improving the reaction activity. Herein, we developed a novel ionic liquid (IL) modification strategy to construct 1-butyl-3-methylimidazolium trifluoroacetate modified Co 2 Ni( OH ) x ([BMIm][TFA]-Co 2 Ni( OH ) x /NF) catalyst. The introduction of IL provides assistance in the morphological structural and electronic configuration modulation, thereby enhancing mass transfer efficiency and the generation of high-valent active species (TFA-M 2+ -OH ⇌ TFA-M 3+ -O). Benefit from the above favorable regulatory strategies, the resulting [BMIm][TFA]-Co 2 Ni( OH ) x /NF exhibits remarkable low onset potential (1.13 V vs. RHE), high current density (97 mA/cm 2 at 1.40 V vs. RHE), and excellent FDCA yield (98%) with high Faradaic efficiency (98%) across a wide potential range (1.44–1.50 V vs. RHE). In addition, the experimental results reveal that IL modification strategy impedes overcover of *OH and hereby effectively suppressed OER process, thus maintaining excellent HMFOR reactivity over a wide voltage range. This route provides a novel and green ligand modification scheme for enhancing the synergistic effect of Ni/Co sites in CoNi hydroxides and rapidly formation of active species for HMFOR.
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Small
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2025
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IF 12.1
Qiankun Zhang,Zhewen Ma,Haimin Zhang,Xuan Lan,Zongkun Bian,Yongchun Luo
This study puts forward an innovative electrolyte design to resolve the problems of scarce efficient proton sources and interface instability in proton batteries. It verifies that hydrogen protons mainly come from water molecule dissociation, with acetic acid acting as an auxiliary source, leading to proton source concentration changes during charging/discharging. To address this, an ionic liquid (1-Ethyl-3-methylimidazolium acetate, abbreviated as [emim][Ac]) electrolyte containing acetic acid (HAc) and potassium acetate (KAc) ([emim][Ac] + 4 m HAc + 1 m KAc) is developed. Experimental results show the battery performs excellently, with a discharge capacity up to 1584 mAh g −1 , and retains 1217 mAh g −1 at a 6000 mA g −1 discharge current density after 300 cycles. Both experiments and simulations confirm H⁺ primarily comes from HAc and H 2 O solvated by K⁺ and imidazolium cations. K⁺ introduces a new “vehicle transport channel” to reduce proton transport resistance, while HAc and KAc form a buffer solution to optimize solvation structure and inhibit side reactions. Ionic liquids provide a stable environment for ion transport. This work offers references for developing high-rate, long-cycle proton batteries.
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TRIBOLOGY INTERNATIONAL
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2025
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IF 6.9
Mingyuan Dou,Qing Feng,Kangchun Li,Zhenpeng Li,Fuchuan Huang,Fukang Deng
The unique physicochemical properties and 2D layered structure of MXene make it a promising lubricant additive. However, its chemical instability limits its application in environmentally friendly and sustainable lubrication systems. Although various strategies have been explored to enhance the chemical stability and tribological properties of MXene aqueous solutions, these approaches often compromise MXene's chemical compatibility and require high-viscosity petroleum-based lubricants. In this study, choline hydroxide and amino acids were added to a Ti 3 C 2 T x aqueous solution, leading to the self-assembly of choline hydroxide and amino acids into ionic liquid micelles. These micelles effectively passivated the surface of Ti 3 C 2 T x and improved its chemical stability. The experimental and simulation results showed that the ionic liquid micelles facilitated the formation of hydrogen bonds and coordination bonds between the amino acid and the Ti 3 C 2 T x surface. This interaction increased the binding energy by 2.5 times, preventing oxidation and degradation for over 90 days of storage. Moreover, during frictional processes, a TiN/TiO 2 reaction film formed between choline hydroxide, amino acids, and Ti 3 C 2 T x contributed to improved tribological properties, reducing the friction coefficient by up to 39.18 % and the wear rate by up to 69.79 %, while ensuring long-term friction stability.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Jian Chen,Hongyan Wang,Hui Wang,Zengxi Li
Oligomerization of C4 olefins is one of the important pathways to utilize this type of resource for the production of high value-added chemicals. The spatial distribution of acid sites in the catalyst is closely related to the catalytic performance and product distribution. Ionic liquids (ILs) are a promising class of catalysts for butene oligomerization. Fabricating an ionic liquid into a poly(ionic liquid) is an effective approach to regulate the acid site distribution. Herein, various acidic poly(ionic liquid)s were synthesized by changing the polymerization method, copolymer block monomer structure, porogens, and assembly sequence during the synthesis process. Characterization results indicated that polymerizing the acidic ionic liquid monomer (1-vinyl-3-sulfobutylimidazolium triflate) with an appropriate amount of cross-linker (divinylbenzene) could effectively regulate the spatial distribution of active sites. The addition of lipophilic comonomers improved the lipophilicity of poly(ionic liquid)s to enhance the miscibility between butene and the catalyst. Moreover, it was found that adjusting the assembly sequence can further disperse the spatial distribution of the active sites of the IL monomer. The poly(ionic liquid) obtained by assembling the comonomer first and then copolymerizing the IL monomer and divinylbenzene, i.e., APIL-DVB@PDVB-EGDMA, contained a sufficient amount of Brønsted acid and exhibited good lipophilicity, with further improved spatial dispersion of acidic sites. When APIL-DVB@PDVB-EGDMA was used as the catalyst, isobutene was completely converted within 1 h, and the dimer selectivity reached 72.4%, in comparison with 100% for conversion and 39.2% for dimer selectivity in the catalysis by the ionic liquid monomer after 3 h.
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危险品化学品经营许可证（带存储）