HYDROMETALLURGY
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2017
·
IF 2.605
Chenglong Shi,Yan Jing,Jiang Xiao,Xingquan Wang,Yongzhong Jia
A novel phosphonium ionic liquid (IL), tetrabutylphosphonium bis(2,4,4-trimethylpentyl)phosphinate([P 4444 ][BTMPP]), was prepared and characterized by NMR spectroscopy. The solvent extraction behavior of lithium from aqueous solution by this IL in toluene was investigated. The extraction behavior was carried out as a function of various parameters such as aqueous acidity, temperature and extractant concentration. The extraction efficiencies obtained in [P 4444 ][BTMPP] were compared with those observed in molecular extractant bis(2,4,4-trimethylpentyl) phosphinic acid (HBTMPP), from which the anion of the ionic liquid extractant was prepared. The extraction efficiency for extraction of lithium by [P 4444 ][BTMPP] was much higher than that for extraction by HBTMPP. The extracted species were ascertained from slop analysis method which indicated 1:1 (metal:ligand) ratio in the complex. In addition, the effects of thermodynamic parameters, the stripping of lithium from the ionic liquid, and the reusability of the phosphonium ionic liquid were studied in detail.
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CRYSTENGCOMM
·
2015
·Vol. 18
·期 5
·714-720
·
IF 4.034
Kai Sun,Changgeng Sun,Shaokun Tang
Coralloid Fe3O4 nanoclusters stacked by nanosheets are successfully synthesized using ferric nitrate as a precursor with an ionic liquid-assisted solvothermal method. For comparison, spherical Fe3O4 nanoclusters assembled by nanospheres are synthesized in the absence of ILs. The morphologies and structures of the products are further characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray power diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicate that the ionic liquid 1-n-decyl-3-methylimidazolium chloride ([Dmim]Cl) plays an important role in controlling the growth orientation of building blocks via selectively adsorbing on a specific crystal plane. A formation mechanism has been proposed based on the interaction between ILs and Fe3O4 crystal planes. The catalytic activity of nanoclusters has been evaluated with the Fenton reaction under UVA irradiation. The coralloid nanoclusters show the highest catalytic activity for the degradation of phenol due to their special morphology and unique surface properties. The synthesis strategy may provide a new way to construct nanomaterials with novel morphologies and excellent properties.
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ENERGY & FUELS
·
2017
·
IF 3.091
Yongli Sun,Yanling Zhang,Luhong Zhang,Bin Jiang,Wenhao Gu,Huawei Yang
In this work, a kind of aqueous solution of novel protic triamine-based ionic liquid was proposed for efficient SO2 capture. The mixed absorbents were prepared by blending 1,1,4,7,7-pentaethyldiethylene (PEDETA) with sulfuric acid and water, and their physicochemical properties were studied by various methods. Remarkably, the viscosities of the mixed absorbents are in the range of 1.44–1.85 mPa s at 293.2 K, which is as low as water. Detailed SO2 absorption experiments were carried out to investigate the influence of some important factors, including temperature (298.2, 313.2, and 328.2 K), SO2 partial pressure (0–1 bar), and sulfuric acid proportion. It is worth noting that the mixed absorbents showed excellent absorption capacity, especially at a low partial pressure. All absorbed SO2 could be released easily and completely by the method of heating reflux. More importantly, the absorbent could be reused for at least 5 cycles without noticeable changes in both absorption performance and chemical structure. A thermogravimetric analysis further confirmed its good thermal stability. The detailed absorption mechanism was proposed and demonstrated by an infrared spectrum. In the end, the pKa values and reaction enthalpy of the protonation reaction of PEDETA were determined by acid titration and parameter analysis based on the reaction equilibrium model. In summary, the mixed absorbents, which possess low viscosities, good resistance to sulfuric acid, excellent capacity, and reusability, may have a good perspective in industrial SO2 capture.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2024
·
IF 4.7
Xiao-qing LU,Ai-min LIU,Feng-guo LIU,Xian-wei HU,Zhong-ning SHI
The feasibility and reaction mechanism of NdFeB film electrodeposition in 1,3-dimethyl-2-imidazolidinone (DMI)−LiNO 3 ionic liquid analogs at room temperature were investigated. Cyclic voltammetry indicated that the reduction peak at −1.83 V (vs Ag) was related to the reduction of Fe(II) to Fe, while the reduction peak at −2.01 V (vs Ag) was related to the reduction of B(III) to B. The electrochemical reduction reaction of Fe(II) and B(III) were irreversible processes controlled by diffusion, and the diffusion coefficients of Fe(II) and B(III) at 313 K were 3.03×10 −6 and 6.74×10 −7 cm 2 /s, respectively. In addition, XRD analysis suggested that the product obtained by the electrodeposition in DMI−LiNO 3 −Nd(CF 3 SO 3 ) 3 −FeCl 2 −H 3 BO 3 ionic liquid analogs for 2 h on the Al substrate contained NdFe 3 B 3 . SEM and EDS analysis showed that Nd, Fe, and B in the cathode product were uniformly distributed. XPS analysis revealed that the mass fractions of Nd, Fe, and B on the W substrate were 27.44%, 27.90%, and 7.51%, respectively.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Zihao Qiao,Weilong Chen,Lei Shi,Haiwen Peng,Bin Li
Ionic conductor-based stretchable sensors are frequently adopted for epidermal electronics, but they are sensitive to changes in the surrounding temperature and humidity, resulting in unstable electrical performance. Here, we prepared a series of high-volume-content ionic liquid filled elastomers (ILE). A volume filling content of 50% (ILE 50%) was obtained, resulting in a significant improvement of the dielectric constant from 3.0 to 22.1 at 100 kHz, and the softness of the composite was perfectly preserved, which is beneficial to preparing high-performance capacitive stretchable sensors. At the same time, ILE can maintain good dielectric properties under multiple large deformations (50%) as well as temperature changes (−20 to 80 °C) and a high humidity (66% RH to 99% RH) environment, showing good mechanical and environmental stability. This strategy provides ideas for the development of reliable epidermal electronics.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Shuo Du,Xiaofu Guo,Jinlong Li,Mengmeng Sun,Yingjie Liu,Qing Ye,Jingtao Bi,Shizhao Wang,Fei Li,Jie Liu,Yeling Zheng,Yingying Zhao
The development of ionic liquids (ILs)-based extractants for the solvent extraction of rare earth elements (REEs) is of great importance but still faces challenges. Based on the molecular structure and thermodynamic characteristics of temperature-responsive ILs (TRILs), a design method for TRILs was developed with the COSMO-SAC solvation model and quantum chemical calculations. A novel dicarboxylate TRILs, 1,6-bis(carboxyethyl)-N,N,N’,N’-tetramethyl-1,6-hexanediamine bis(trifluoromethanesulfonyl)imide ([CM-TMHDA][Tf 2 N] 2 ) was successfully synthesized, along with dihydroxy TRILs 1,6-Bis(hydroxyethyl)-N,N,N’,N’-tetramethyl-1,6-hexanediaminium bis(trifluoromethanesulfonyl)imide ([HE-TMHDA][Tf 2 N] 2 ) and diester TRILs 1,6-Bis(ethyl acetate)-N,N,N’,N’-tetramethyl-1,6-hexanediaminium bis(trifluoromethanesulfonyl)imide ([EA-TMHDA][Tf 2 N] 2 ) reported in literatures. By combining experimental and molecular simulation analyses, the phase behavior of [CM-TMHDA][Tf 2 N] 2 and the effects of acids and inorganic salts on its phase behavior were systematically studied. Additionally, a temperature-controlled phase transition system composed of TRILs and aqueous solutions was developed for the extraction and separation of Nd(III) from aqueous solutions. The results indicated that the homogeneous extraction system constructed with TRILs reduced interfacial mass transfer resistance, significantly enhancing the extraction kinetics of Nd(III). Various experimental parameters were optimized, revealing that under the conditions of 80 °C for 30 min, the carboxylic functionalized IL achieved optimal extraction efficiency for Nd(III), reaching 56 %. After four cycles, the extraction performance of [CM-TMHDA][Tf 2 N] 2 maintained. This study provides new insights for improving the separation and extraction techniques of REEs, demonstrating substantial potential for applications in this field.
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LANGMUIR
·
2025
·
IF 3.9
Jinghan Ding,Jiakang Yu,Jinmeng Zhu,Liuyang Han,Hong Guo,Rui Feng,Wenqiang Dong,Xichen Zhao,Shan Wang,Li Li,Xuanhua Li
Palm leaf manuscripts, crafted from specially treated palm leaves, are invaluable historical documents. However, they degrade and tend to become brittle over time. To date, plant essential oils and glycerin are the used materials to improve the flexibility of palm leaf manuscripts, but the effective duration of these materials is short due to their volatility. This work introduces ionic liquids, a nonvolatile and stable material, to achieve durable toughening of the palm leaf manuscripts. We select 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF4]), one of the most used ionic liquids, as the subject of research. We find that [BMIm][BF4] does not alter the palm leaf manuscripts’ appearance and significantly improves their tensile strength and fracture toughness by 39.9 and 101.0%, respectively, while reducing the bending modulus by 25.7% and increasing the bending fracture deflection by 2.6 times. Notably, [BMIm][BF4]’s toughening effect for palm leaf manuscripts is sustainable for over 2 months, outperforming traditional methods that last only about 1 week. Even under harsh conditions, such as low humidity, high temperatures, alkalinity, and UV exposure, [BMIm][BF4] still maintains its effectiveness. Through the analysis of its composition, structure, and theoretical simulation, we reveal that [BMIm][BF4] penetrates the manuscripts, filling the pores between the inner structure of them and adsorbing strongly with cellulose. This enhances load transfer and reduces the stress concentration, resulting in increased toughness. This research provides innovative materials for palm leaf manuscript conservation and deepens our understanding of their mechanical properties.
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PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Jinhui Song,Jiaxin Xie,Tianfu Zhang,Mengjiao Xing,Zimin Peng,Wenyao Gu,Jianyu Tang,Lu Tang,Suyao Liu,Yi Liu,Tong Chang,Yiwen Fang
Advancing the conventional hydrothermal and ionic liquid-assisted synthesis methodologies to produce ZSM-22 zeolites with similar characteristics yet notably distinct defect sites holds substantial significance in elucidating their influence on shape selectivity and hydroisomerization performance. This study investigated the impact of the initial gel ratio and synthesis parameters on the ionic liquid-assisted crystallization process and the crystal size of the ZSM-22 zeolite. The NH4F feed exhibits a minimal effect on the crystallization process, in contrast to the beneficial effect of improved ionic liquid and decreased water feed on substantially diminishing the crystal size of the resulting zeolites, which exhibit a morphology similar to that of the ZSM-22 zeolite obtained through the conventional synthesis route. Furthermore, the investigation into the crystallization process revealed that both ionic liquids and high temperatures play indispensable roles in accelerating the nucleation and crystal growth of ZSM-22 zeolite. When applied in the n-dodecane hydroisomerization, the nanosized ZSM-22 zeolites prepared by ionic liquid-assisted route exhibit remarkable isomer yield (above 72%), surpassing the conventional and large-size ZSM-22 zeolites. After the product distribution analysis, it is evident that the fewer Si–OH defect sites and the correspondingly strict confinement environment effectively limit the formation of the multibranched intermediates prone to crack, which ultimately improves the hydroisomerization performance, intrinsically reflecting the shape selectivity of the 10-membered ring zeolite by eliminating the interference of the framework defect sites. This work emphasizes the exceptional hydroisomerization performance of the ZSM-22 zeolite, highlighting the significance of its efficient synthesis and wide application.
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MOLECULES
·
2024
·Vol. 29
·期 17
·4007
·
IF 4.2
Sheli Zhang,Yuerong Yan,Qiang Zhou,Yunchang Fan
The recovery of scandium (Sc) from highly acidic industrial effluents is currently hindered by the use of large quantities of flammable and toxic organic solvents. This study developed an extraction system using ionic liquids (ILs) and phenylphosphinic acid (PPAH) as diluents and an extractant, respectively, to selectively recover Sc from the aqueous phase. The effect of IL chemical structure, aqueous pH and temperature on the extraction of Sc was systematically investigated and the findings revealed that ILs with longer alkyl side chains had reduced Sc extraction ability due to the presence of continuous nonpolar domains formed by the self-aggregation of the IL alkyl side chain. The IL/PPAH system maintained high extraction ability toward Sc across a wide temperature range (288 K to 318 K) and the extraction efficiency of Sc could be improved significantly by increasing the aqueous pH. The extraction process involved proton exchange, resulting in the formation of a metal−ligand complex (Sc(PPA) 3 ).
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PubMed
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Molecular Catalysis
·
2024
·
IF 3.9
Lipeng Wang,Meilin Yin,Rui Li,Shaokun Tang
Converting CO 2 into high-value chemicals is an essential way to mitigate greenhouse impact and realize sustainable utilization of resources. In this work, the COF materials named X-QCOF ( X = OH, OCH 3 ) were synthesized by a three-component Povarov reaction, followed by chemical grafting of hydroxyl‑functionalized ionic liquid into the COFs neutral backbone via quaternization to obtain the hybrid materials IL-X-QCOF ( X = OH, OCH 3 ). The resultant IL-X-QCOF can efficiently catalyze the cycloaddition reaction of CO 2 and epoxides in the absence of metals, additives and solvents. Among them, IL-OH-QCOF exhibits a yield of 97.2% of cyclochloroallyl carbonate with a high turnover frequency (TOF) value of 217.7. The inherent high specific surface area of the COF-based materials promotes mass transfer efficiency, and meanwhile the abundant hydroxyl groups and bromine anions occurring in the backbone create excellent catalytic effect. Attributed to the chemical grafting approach, the product yield keeps over 90% when IL-OH-QCOF is reused for 6 cycles.
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MATERIALS RESEARCH BULLETIN
·
2011
·
IF 2.146
Jinbo Zhao,Lili Wu,Ke Zou
The novel NiO hexagonal hollow microspheres have been successfully prepared by annealing Ni(OH) 2 , which was synthesized via an ionic liquid-assisted hydrothermal method. The samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), N 2 adsorption–desorption and Fourier transform infrared spectrometer (FTIR). The results show that the hollow NiO microstructures are self-organized by mesoporous cubic and hexagonal nanocrystals. The mesoporous structure possessed good thermal stability and high specific surface area ( ca. 83 m 2 /g). The ionic liquid 1-butyl-3methylimidazolium tetrafluoroborate ([Bmim][BF 4 ]) was found to play a key role in controlling the morphology of NiO microstructures during the hydrothermal process. The special hollow mesoporous architectures will have potential applications in many fields, such as catalysts, absorbents, sensors, drug-delivery carriers, acoustic insulators and supercapacitors.
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MICROCHIMICA ACTA
·
2012
·Vol. 177
·期 1
·237-243
·
IF 3.033
Fan Yunchang,Zhang Sheli,Yang Fanming,Niu Haibo,Shi Jiajia
We have prepared the hydrophobic amino-functionalized ionic liquid (IL) 1-(2-aminoethyl)-3-butylimidazolium hexafluorophosphate and investigated its extraction behavior for copper(II) ion as a model cation. The IL, due to the presence of an amino group, is capable of complexing Cu(II) in a ratio of 6:1. The parameters affecting the extraction efficiency were optimized. The IL-based liquid–liquid microextraction was successfully applied to the analysis of Cu(II) in an environmental water standard reference material. The results are promising in terms of liquid–liquid microextraction, separation, and preconcentration of Cu(II).
A hydrophobic amino-functionalized ionic liquid (IL) [NH 2 C 2 C 4 im][PF 6 ] was synthesized. The IL exhibits good extractability for copper (II) ion due to the presence of an amino group.
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危险品化学品经营许可证（带存储）