Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Jun Li,Ronghao Liu,Xiaolu Yin,Yanzhao Yang
Two types of ionic liquids, Ethyl 2-(4-methylmorpholin-4-ium-4-yl)acetate bis(trifluoromethanesulfonyl)imide ([EMMi][NTf 2 ]) and Ethyl 6-(4-methylmorpholin-4-ium-4-yl)hexanoate bis(trifluoromethanesulfonyl)imide ([EHMMi][NTf 2 ]), which have exceptional extraction capabilities, were designed and synthesized. A solvent-free extraction system was established. By using only 16 mg of [EMMi][NTf 2 ], controlling the upper critical solution temperature (UCST) temperature to 333 K, and increasing the reaction time to 10 min, the Au(III) extraction efficiency can reach 98.6%. The theoretical calculations provided insight into the potential efficacy of utilizing ionic liquids for the extraction of Au(III), whereas the molecular dynamics simulations revealed the fundamental factors driving this extraction process, primarily attributed to the electrostatic interaction and van der Waals interaction interplay between the cations of the ionic liquid and Au(III). The anion exchange mechanism can be discerned from UV Vis and 13 C-NMR spectra. [EMMi][NTf 2 ] demonstrated an extraction efficiency of 97.31% and effectively extracted Au(III) from the CPU diluent solutions. [EMMi][NTf₂] exhibited remarkable stability (>89% efficiency after 5 cycles) and exceptional profitability (output–input ratio: 2006%), making it a sustainable and economically viable extractant.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.3
Guanai Qu,Lei Liu,Hongling Fang,Yi Li,Songwei Zhang,Huimin Yang,Litian Hu
In the aerospace industry, many mechanical failures result from friction-related issues, which reduce component lifespans and lead to resource waste. Consequently, effectively reducing friction and achieving ultralow wear under extreme conditions, especially on bearing steels, remain a significant challenge. Currently, lubricants exhibiting high chemical reactivity are commonly employed to generate robust tribofilms on metal surfaces, thereby providing effective protection to the metal substrate. However, these intense friction-induced chemical reactions consume the substrate at the same time. Moreover, such reactive materials frequently cause corrosion, further compromising component durability. To address these issues, this study introduces innovatively a class of low-reactivity halogen-free piperazine-derived protic ionic liquids as neat lubricants. Compared to traditional space liquid lubricants, the synthesis methods of protic ionic liquids do not require high-temperature polymerization, making the preparation process more environmentally friendly and reducing energy consumption. The piperazine-derived protic ionic liquids exhibit noncorrosiveness toward metals and achieve an ultralow wear rate of 3.77 × 10–10 mm3 N–1 m–1. The formation of a mechanically robust interface effectively extends the service life of moving parts in harsh environments. These results highlight the promising application potential of low-reactivity PILs as space lubricants and provide a greener strategy for ultralow wear and corrosion resistance on bearing steel.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Zixuan Hao,Liju Bai,Shuai Wang,Kaiqing Sun,Yali Yao,Helei Liu
Conventional CO 2 capture methods, such as amine-based absorption, are hindered by solvent degradation, and corrosion issues, while solid adsorbents often suffer from limited adsorption capacity under flue gas conditions. To address these challenges, ionic liquids (ILs)-modified materials have emerged as promising alternatives due to their high efficiency, tunability, and environmental compatibility. Herein, using Lys as the anion, DETA, TETA, and TEPA were respectively combined to synthesize ILs with different chain lengths using one-step synthesis. These ILs were then loaded onto the mesoporous silica C803 carrier by impregnation. Characterization results indicate uniform distribution of ILs within the carrier without disruption of its mesoporous structure. At 298 K and 0.1Mpa, 66 wt% [TETA][Lys]-C803 exhibited the highest CO 2 adsorption capacity (2.51 mmol/g), representing 700% increase compared to C803, which was capacity further increased to 2.82 mmol/g at 308 K and 0.1Mpa. The material exhibited an excellent IAST-predicted CO 2 /N 2 selectivity of up to 200.17 for a 15/85 CO 2 /N 2 mixture, rapid adsorption kinetics (95% equilibrium in 6 min), and stable recyclability (unchanged performance after five cycles). Combined FTIR and DFT analyses revealed that lysine anions stabilize products and zwitterionic intermediates via electrostatic networks, thus enhancing CO 2 amine binding energy remarkably. The study further provides a novel strategy and theoretical basis for developing high-performance, renewable CO 2 capture materials for flue gas.
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高影响因子
JOM
·
2026
·
IF 2.3
Yang Xue,Zhang Xin,Liu Aimin,Shi Zhongning
Magnesium-lithium alloys have emerged as promising lightweight materials for aerospace applications due to their outstanding specific strength and low density. In this study, an aluminum coating was electrodeposited onto a commercial LA103Z magnesium-lithium alloy using an environmentally friendly aluminum chloride-triethylamine hydrochloride (AlCl 3 -Et 3 NHCl) room-temperature ionic liquid electrolyte to enhance its corrosion resistance. The aluminum coating serves as a protective layer that improves the surface functionality and extends the service life of the magnesium-lithium alloy. The electrodeposition mechanism, surface morphology, microstructure, and corrosion behavior of the aluminum coatings were systematically investigated using scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and electrochemical analysis. The results reveal that aluminum electrodeposition in the AlCl 3 -Et 3 NHCl electrolyte follows a three-dimensional instantaneous nucleation mechanism, with the reduction of electroactive Al 2 Cl 7 − ions to metallic aluminum being diffusion-controlled. At a deposition potential of − 0.4 V, the resulting aluminum coating exhibited a smooth, compact, and uniform morphology. However, as the deposition potential shifted to more negative values, the coating surface became rougher, accompanied by crack formation and increased grain size. Furthermore, higher deposition temperatures led to the development of coarser and less uniform grains. The optimal coating performance was achieved at a deposition potential of − 0.4 V and a temperature of 303 K, where the aluminum layer displayed fine grains, low surface roughness, and superior corrosion resistance.
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高影响因子
ChemCatChem
·
2023
·Vol. 15
·期 5
·e202201274
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IF 4.5
Shengbin Shi,Wenting Wu,Panli Liu,Guomin Xiao
Graphical Polymeric ionic liquids for conversion of cellulose into levulinic acid : A high levulinic acid yield of 79.4 % was achieved when used cellulose as substrates and sulphonic acid-functionalized polymeric ionic liquids as catalyst. Sulphonic acid-functionalized polymeric ionic liquids (PILs) were synthesized and applied into catalytic conversion of cellulose into levulinic acid (LA). The structure, thermal stability, and Hammett acidity function (H 0 ) of PILs were characterized and all were more thermostable than those of small-molecular ionic liquids (IL). At the optimum reaction conditions, the LA yield was maximized to 79.4 % by catalyst [Pim]CH 3 SO 3 . More importantly, catalyst [Pim]CH 3 SO 3 performed well in other biomass conversion, such as cellobiose, starch and rice husk. The product LA can be easily extracted by methyl isobutyl ketone from the reaction mixture. The PILs with high catalytic activity were easily recycled with an LA yield up to 68.9 % even after five cycles. These sufficient PILs will offer new approaches for transforming biomass to platform chemicals.
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高影响因子
FUEL
·
2022
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IF 8.035
Yuke Zhang,Mingyue Qiu,Jie Li,Haonan Wu,Lijuan Shi,Qun Yi
Lewis pair catalyst is considered to be a cutting-edge tool for the low-energy activation and subsequent conversion of CO 2 , which, yet suffers from complex preparation and unclear design strategy. This work proposes a one-step strategy for precisely constructing Lewis pair heterogeneous catalysts through the coordination of amino-functionalized poly(ionic liquid) (PIL) and metal cations for atmospheric CO 2 conversion to cyclic carbonates. Self-tunability in the strength and ratio of Lewis acidic/basic sites is imparted by the facile regulation of the type/content of metal ions (Zn 2+ /Co 2+ /Cu 2+ ), which is crucial for promoting acid/base cooperation in CO 2 cycloaddition. The synergy of M 2+ , Br - and C-2 proton on imidazolium ring with an optimum acid/base molar ratio of ca. 1.47 has been proved to activate CO 2 and epoxides synchronously, inducing a promising catalytic activity with high yield (∼95 %) and selectivity (>99 %) of cyclic carbonates under atmospheric pressure and low temperature (≤75 °C) without cocatalyst.
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高影响因子
Food and Bioprocess Technology
·
2022
·Vol. 15
·期 1
·190-202
·
IF 5.581
Wang Liling,Wang Yanbin,Qin Yuchuan,Liu Bentong,Zhou Yifeng
This study aimed to develop the extraction method of protein from edible oil for rapid detection. Firstly, aqueous biphasic systems (ABS) based on six hydrophilic ionic liquids (ILs) and three salts were developed and the phase diagram was drawn by turbidimetric point method. The binodal curves were fitted to the Merchuk equation. On this basis, the ABS composed of IL and salt were applied to extract protein from edible oil. The type of IL or salt, IL concentration, salt concentration, oil mass, extraction pH, and temperature on the extraction efficiency of protein from oil were investigated. The results showed that the optimum conditions for the extraction of protein from edible oil with ABS were as follows: 50% (w/v) K 3 PO 4 , 20% (w/v) [Bmim]Cl at 35 ℃, and pH 9.0. Under the optimal conditions, the protein extraction efficiency was almost 100%. Also, the extraction mechanism was studied and the main driving factors of protein extraction may be the hydrophobicity, electrostatic interaction, and salting-out between molecules. Finally, the method was used to detect the commercial edible oils from different sources. The results showed that the ABS could also be used to extract protein from other edible oils. In conclusion, the IL-based ABS method is simple and rapid for protein extraction from edible oil, and will highlight novel possibilities in the large-scale separation and purification of protein from oily solution.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
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IF 6.633
Xiaohui Li,Yingying Guo,Huiyong Wang,Zhiyong Li,Jianji Wang
The understanding of vesicle formation mechanism of ionic liquids (ILs) in aqueous solution is of great significance for the innovation and application of IL vesicles. In this work, a series of single-tailed amphiphilic ionic liquids (ILs) consisted of 1-tetradecyl-3-methylimidazolium [C 14 mim] + and five kinds of anions have been designed to examine the regulation of anionic structures on the vesicle formation of ILs in water without any additives by surface tension, conductivity, cryogenic transmission electron microscopy, dynamic light scattering, small-angle X-ray scattering, and NMR spectroscopy. It is found that synergistic effect of hydrophobic and π-π interaction plays a vital role in the vesicle formation of 1-tetradecyl-3-methylimidazolium 1, 2, 3-benztriazole ([C 14 mim][1, 2, 3-Ben]). Interestingly, reversible structural transition between vesicle and micelle of this IL is observed by alternating CO 2 and N 2 bubbling due to the reversible formation of carbamate arising from the reaction between CO 2 and the anion of the IL.
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高影响因子
Journal of CO2 Utilization
·
2022
·
IF 8.321
Yuntao Lei,H.Q. Nimal Gunaratne,Lili Jin
Novel and facilely prepared 2-pyridinamide-functionalized ionic liquids 1–4 (PAIL1–4) were explored for the cycloaddition reaction of carbon dioxide with various epoxides to generate cyclic carbonates . The optimum temperature, CO 2 pressure, and catalyst dosage of the cycloaddition reaction, are 60 °C, 0.5 MPa, and 5 mol% respectively. The synthesized N, N -dimethyl- N -(2-oxo-2-(pyridin-2-ylamino)ethyl)butan-1-aminium iodide (PAIL-3) exhibited brilliant catalytic activities under mild conditions with nearly quantitative selectivity and conversion in the absence of any solvents, or metal co-catalysts. The catalyst PAIL-3 could be recycled 4 times without obvious loss of its catalytic activity. Moreover, a plausible mechanism is proposed based on the NMR experiments. The designed pyridinamide functionalized ionic liquids integrated pyridine unit, halogen anion and the N-H moiety in amide and they have an excellent synergistic catalytic effect in promoting the coupling reactions of carbon dioxide and epoxides.
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高影响因子
Frontiers in Bioengineering and Biotechnology
·
2022
·
IF 6.064
Xue Yu,Zhang Xiao-Guang,Lu Ze-Ping,Xu Chao,Xu Hua-Jin,Hu Yi
Various betaine ionic liquids composed of different chain lengths and different anions were designed and synthesized to modify Candida antarctica lipase B (CALB). The results showed that the catalytic activity of all modified lipases improved under different temperature and pH conditions, while also exhibiting enhanced thermostability and tolerance to organic solvents. With an increase in ionic liquid chain length, the modification effect was greater. Overall, CALB modified by [BetaineC16][H2PO4] performed best, with the modified CALB enzyme activity increased 3-fold, thermal stability increased 1.5-fold when stored at 70°C for 30 min, with tolerance increased 2.9-fold in 50% DMSO and 2.3-fold in 30% mercaptoethanol. Fluorescence and circular dichroism (CD) spectroscopic analysis showed that the introduction of an ionic liquid caused changes in the microenvironment surrounding some fluorescent groups and the secondary structure of the CALB enzyme protein. In order to establish the enzyme activity and stability change mechanisms of the modified CALB, the structures of CALB modified with [BetaineC4][Cl] and [BetaineC16][Cl] were constructed, while the reaction mechanisms were studied by molecular dynamics simulations. Results showed that the root mean square deviation (RMSD) and total energy of modified CALB were less than those of native CALB, indicating that modified CALB has a more stable structure. Root mean square fluctuation (RMSF) calculations showed that the rigidity of modified CALB was enhanced. Solvent accessibility area (SASA) calculations exhibited that both the hydrophilicity and hydrophobicity of the modified enzyme-proteins were improved. The increase in radial distribution function (RDF) of water molecules confirmed that the number of water molecules around the active sites also increased. Therefore, modified CALB has enhanced structural stability and higher hydrolytic activity.
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PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Pengrui Zhang,Ciming Wang,Zixuan Xue,Lianjing Mao,Jinhe Sun,Fei Shao,Mixiang Qi,Yan Jing,Yongzhong Jia
Controlled fusion energy is considered to be one kind of sustainable energy source with clean and green properties. The fusion process requires a large number of lithium isotopes, but the naturally stable lithium isotopes 6 Li and 7 Li cannot be directly applied to the fusion process and must be further enriched. In this paper, a system for the separation of lithium isotopes by extraction was investigated, which mainly consists of bromobenzene-15-crown-5 and ionic liquids. The effects of ionic liquids, lithium salts, crown ether concentration, and temperature on the separation performance of lithium isotopes were explored. It was found that 6 Li was enriched in the organic phase and the single-stage separation factor reached 1.032. It was proved by the temperature experiment that the exchange of lithium isotopes was a spontaneous and exothermic process. The complexation ratio of crown ether and lithium ions was 1:1. The optimized complexation model and the interaction of crown ether and lithium ions were calculated by DFT and Multiwfn. Lithium ions were weakly bonded to the crown ether and strongly bonded to the water molecule as demonstrated by the non-bonded interactions and Mayer bond order of Li-O. Meanwhile, the mechanism of lithium isotope separation with crown ether was clarified by mutual verification of experiment and theoretical calculations.
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高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Pengrui Zhang,Zixuan Xue,Ciming Wang,Jinhe Sun,Fei Shao,Xingwu Zou,Bo Li,Mixiang Qi,Yan Jing,Yongzhong Jia
Lithium and lithium isotopes are important for clean energy development. By introducing ionic liquid , the extraction performance of crown ethers for lithium ions can be significantly improved. However, the enhancement mechanism of ionic liquids in the system is not clear, which directly limits the selection of suitable ionic liquids for various applications. In this work, the synergy mechanisms of different ionic liquids with crown ether during the extraction process were investigated by molecular dynamics simulations and verified by experimental results. There were two molecular mechanisms to capture lithium ions for ionic liquids in the crown ether system: co-extraction and assisted extraction. It was generally considered that the cation exchange mechanism was responsible for the extraction of lithium ions in the crown ether-ionic liquids system. Here, a novel perspective was revealed that one [Li·H 2 O] + complexed with crown ether and then the chelate cation coordinated with the anion of the ionic liquid to form a neutral molecule based on the simulation of the whole extraction process with molecular dynamics that favored the transport of Li + from aqueous solution to organic solution. In the system without ionic liquids, Li + -crown ether chelates were distributed only at the interface and did not enter the organic phase which is supported by very low extraction efficiency. It was attributed that charge equilibrium cannot be achieved when Li + -crown ether chelates enter into organic solution in the absence of ionic liquids. Overall, a new insight into the interfacial transport mechanisms of lithium ions was proposed, in which the anion of ionic liquids played a key role in capturing lithium ions at the interface of aqueous solution and organic solution.
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高影响因子
危险品化学品经营许可证（带存储）