JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2024
·
IF 1.9
Rong Wang,Shuai Liu,Zhongying Li,Guanyi Peng,Ming Duan,Jinlong Pan,Hui Dong
The synergistic effect of ionic liquids (ILs) and anionic surfactants, ILs and cationic surfactants, and ILs and nonionic surfactants to form microemulsions has been studied by other researchers, while the synergistic effect of ionic liquids and zwitterionic surfactants to form microemulsions has not been reported. Here, we report the synergistic effect of imidazolium ionic liquid, 1-hexadecyl-3-methylimidazolium bromide [C16mim] [Br], and betaine-type zwitterionic surfactant, cocamidopropyl hydroxysultaine (CAHS), as surfactants, to form microemulsions with n-butanol, n-hexane and water. Phase behavior of the systems with different mass ratios of two surfactants, varied mass ratios of surfactant to cosurfactant (Km), and different temperatures are investigated by pseudo-ternary phase diagrams. The single-phase region of the microemulsion is maximized when the ratio of CAHS to [C16mim] [Br] is 1:4 and Km is 1.5, with little temperature dependence. The size and the polarity of microemulsions are explored. The synergistic effect of [C16mim] [Br] and CAHS is confirmed by surface tension and interface tension. A universal preparation method to form microemulsions by combining ionic liquids with zwitterionic betaine-type surfactants is provided and it play a pivotal role in broadening the potential uses of ILs in microemulsions.
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Yiqian Yang,Yu Chen,Gang Wang,Hanwen Yan,Lili Wang,Shuguang Xiang,Chunshan Li
The synthesis of propylene carbonate (PC) from CO 2 and propylene oxide (PO) is a typical gas-liquid biphasic system, where gas-liquid mass transfer efficiency significantly influences CO 2 cycloaddition reactions. Here, we proposed a microchannel reaction system for the CO 2 cycloaddition reaction catalyzed by ionic liquid within an aqueous environment. The effect of liquid flow rate, temperature and residence time on gas-liquid flow pattern, catalytic performance and mass transfer were systematically investigated. The results revealed that the PC generation rate reached 560.11 mmol·ml −1 ·h −1 ) at a 50 cm of flow distance under reaction conditions of 105 °C, 2.5 MPa, Q G =176 sccm and Q L =0.3 ml·min −1 . Variations in mass transfer rate and reaction rate at different flow distances were experimentally studied. The reaction efficiency gradually decreased with increasing flow distance, which were attributed to the reduction of mass transfer caused by decreasing bubble velocity. Optimizing bubble velocity at an appropriate position enhanced reaction efficiency by improving mass transfer, achieving a 97.7% PC yield within 2.85 min. Furthermore, a kinetic model coupling intrinsic kinetics with gas-liquid mass transfer was developed for CO 2 cycloaddition reaction. The kinetic model was applied to predict PC reaction rates in microchannel reactors at various temperatures and liquid flow rates, achieving an average relative error of 9.6%.
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SEPARATION SCIENCE AND TECHNOLOGY
·
2025
·
IF 2.3
Chunlai Wu,Aimaiti Gali,Chuanyun Peng,Yalei Miao,Juan Li,Xinyu Gao
The treatment of dye wastewater is of crucial significance for alleviating water pollution, ensuring ecological security and achieving the sustainable utilization of water resources. In this work, the 1-allyl-3-butylimidazolium chloride ionic liquid modified Co/Fe-LDH (Co/Fe-LDH@IL) was successfully synthesized and explored for elimination Methylene Blue (MB) from aqueous solutions. Characterizations revealed that the incorporation of ionic liquids notably increased the specific surface area from 5.37 m2.g−1 to 8.15 m2.g−1. Additionally, the number of surface active sites, was significantly enhanced. For a 25 mL MB solution with an initial concentration of 300 mg.L−1, the optimal dosage of Co/Fe-LDH@IL was determined to be 30 mg, achieving adsorption equilibrium within 20 min. Under these conditions, the maximum adsorption capacity was 517.43 mg.g−1. Kinetic studies indicated that the pseudo-second-order model accurately described the process. The Langmuir isotherm model provided a better fit than the Freundlich model, indicating a homogeneous monolayer adsorption mechanism. Column adsorption experiments further validated the superior performance of Co/Fe-LDH@IL in treating MB solutions of different concentrations. The adsorption mechanism involved electrostatic interactions, interface regulation by IL molecules, and monolayer π-π interaction adsorption on imidazole functional group. Co/Fe-LDH@IL exhibits outstanding adsorption performance and stability, showing great potential for efficiently treating MB-containing wastewater.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 12
·2312358
·
IF 19
Xilu Wu,Zhiyuan Bai,Bingwei Bao,Qinghong Zhang,Weizhong Jiang,Yaogang Li,Chengyi Hou,Kerui Li,Hongzhi Wang
Electrochromic technology that enables modulation of a material's optical properties by application of an applied voltage is utilized in smart windows. However, avoiding water absorption by lithium salt in the electrolyte necessitates complex encapsulated device assemblies that must be constructed under strict atmosphere conditions and are largely unrepairable. Herein, a lithium-salt-free, hydrophobic, solid-state poly(ionic liquid) electrolyte based on strong C─F bonds that exhibits low polarizability, low moisture absorption, and a wide electrochemical window, allowing the fabrication of unencapsulated electrochromic devices with outstanding long-term cycling and environmental stability are presented. Intimate contact between the electrolyte and the electrode is achieved through integrated in situ polymerization, providing an interface with multiple molecular interactions that impart robust adhesion, efficient ion transport, and excellent stability. To demonstrate the potential of this electrolyte for cost-effective electrochromic smart windows, low-cost (≈110 USD m −2 ), unencapsulated, removable, electrochromic “window tint film” with customizable dimensions and shapes are fabricated.
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2018
·Vol. 25
·期 9
·1-9
·
IF 1.434
Du Huang,Han Ruitao,Tang Erjun,Zhou Jian,Liu Shaojie,Guo Xiaofeng,Wang Ruihong
A pH-responsive cellulose-g-P4VP copolymer was synthesized by atom transfer radical polymerization (ATRP) in ionic liquid 1-allyl-3-methylimidazolium chloride [AMIM]Cl. The polymer structure was characterized by Fourier transform infrared (FT-IR), 1 H nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC). The P4VP brushes that were covalently bonded to the cellulose backbone had a narrow molecular weight distribution, which was helpful for use in drug loading. The loading and controlled release of drug using aspirin as model drug in the micelles obtained the cellulose-g-P4VP copolymer was investigated. The structure and size of the copolymeric micelles were characterized by transmission electron microscopy (TEM), dynamic light scattering (DLS) and ultraviolet–visible (UV-Vis) spectroscopy, respectively. Blank micelles presented a stably spherical morphology with dimeter about 90 nm in aqueous solution. The resultant micelles had clear pH-sensitivity with a pH-dependent phase transition point at a pH of about 5.7. Drug-loaded micelles had a spherical, core–shell structure with dimeter about 150 nm. The polymeric micelles revealed an excellent controlled drug release at different pH values and the cumulative release of aspirin in phosphate buffer reached to 86.4% at pH 5.8, 60.9% at pH 7.4 and 42.2% at pH 8.0.at 50 h. The pH-sensitive cellulose-g-P4VP copolymer had an enormous potential as carriers for released drug delivery.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2012
·Vol. 18
·期 19
·5954-5969
·
IF 5.925
Meng He,Peng Huang,Chunlei Zhang,Jiebing Ma,Rong He,Daxiang Cui
Graphical Two-phase synthesis : A facile, user- and environmentally friendly ( n -octanol-induced) oleic acid (OA)/ionic liquid (IL) two-phase system for the phase- and size-controllable synthesis of small (<50 nm) water-soluble hexagonal rare earth (La, Gd, and Y) fluoride nanocrystals with uniform morphologies is described (see figure). Herein, we introduce a facile, user- and environmentally friendly ( n -octanol-induced) oleic acid (OA)/ionic liquid (IL) two-phase system for the phase- and size-controllable synthesis of water-soluble hexagonal rare earth (RE=La, Gd, and Y) fluoride nanocrystals with uniform morphologies (mainly spheres and elongated particles) and small sizes (<50 nm). The unique role of the IL 1-butyl-3-methylimidazolium hexafluorophosphate (BmimPF 6 ) and n -octanol in modulating the phase structure and particle size are discussed in detail. More importantly, the mechanism of the ( n -octanol-induced) OA/IL two-phase system, the formation of the RE fluoride nanocrystals, and the distinctive size- and morphology-controlling capacity of the system are presented. BmimPF 6 is versatile in term of crystal-phase manipulation, size and shape maintenance, and providing water solubility in a one-step reaction. The luminescent properties of Er 3+ -, Ho 3+ -, and Tm 3+ -doped LaF 3 , NaGdF 4 , and NaYF 4 nanocrystals were also studied. It is worth noting that the as-prepared products can be directly dispersed in water due to the hydrophilic property of Bmim + (cationic part of the IL) as a capping agent. This advantageous feature has made the IL-capped products favorable in facile surface modifications, such as the classic Stober method. Finally, the cytotoxicity evaluation of NaYF 4 :Yb,Er nanocrystals before and after silica coating was conducted for further biological applications.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 9
·3667-3676
·
IF 3.269
Hanbing Rao,Zhaoyi Zhang,Hongwei Ge,Xin Liu,Ping Zou,Xianxiang Wang,Yanying Wang
In our work, a NiCo2O4/nitrogen-doped reduced graphene oxide/ionic liquid (NiCo2O4/N-rGO/IL) nanocomposite was prepared using hydrothermal treatment and calcination followed by a facile reaction with stirring. The composite material was characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), FTIR spectra and thermogravimetric analysis (TGA). The biosensing properties of NiCo2O4/N-rGO/IL, NiCo2O4/N-rGO and NiCo2O4 towards glucose were studied based on a glassy carbon electrode. The NiCo2O4/N-rGO/IL nanocomposite exhibits excellent electrocatalytic activity towards glucose, with a sensitivity of 3.76 mA mM−1 cm−2 and a good linear response from 0.001 mM to 4.555 mM at a potential of +0.5 V. The limit of detection can reach 0.18 μM. It also shows significant electrochemical sensitivity, reproducibility and long-term stability. The good electrocatalytic activity is attributed to the synergistic effect of the metal oxides, graphene oxide and the IL. The N-doping of rGO accelerates the electron transfer of the IL further and enhances its electrochemical properties. In addition, the sensor is effectively applied to the determination of glucose in a human blood serum sample.
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IONICS
·
2018
·Vol. 25
·期 6
·2781-2789
·
IF 2.347
Chen Yujuan,Sun Li,Lu Zhiwei,Liu Zhaoen,Jiang Yuyang,Zhuo Kelei
In this paper, nitrogen and sulfur co-doped graphene aerogel (NS-GA) was successfully prepared using ionic liquid 1-(4-mercaptobutyl)-3-methylimidazolium bromide (HS-BMIMBr) as both reductant and dopant by a one-step hydrothermal method. The results of X-ray diffraction indicate that the doping of heteroatoms into graphene increases its degree of defects. In addition, scanning electron microscopy measurements and nitrogen adsorption–desorption analysis reveal that the as-prepared NS-GA has unique hierarchical porous nanostructures, which supply efficient networks for ionic transports and electron transfer. The symmetric electrical double-layer capacitors (EDLCs) based on the NS-GA with ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate, EMIMBF 4 ) as the electrolyte show excellent capacitive performance. And the NS-GA has a high specific capacitance of 182.3 F g −1 at a current density of 1 A g −1 . Moreover, there is a high energy density of 101 Wh kg −1 at a power density of 1 kW kg −1 . Therefore, the NS-GA can be considered as a favorable electrode material for high-performance energy storage devices.
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BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Yingyuan Wei,Sandile Fakudze,Yu Zhang,Min Song,Tianjiao Xue,Ruiyan Xie,Jianqiang Chen
Ionic liquid loaded ZSM-5 with high stability and catalytic performance was used for hydrothermal liquefaction (HTL) of pomelo peel for the first time. Bio-oil obtained at 200 °C had the highest yield (29.21 wt%) and high heating value (21.41 MJ/kg), with main constituents of 5-hydroxymethylfurfural (5-HMF, 50.10%), 3-Pyridinol (19.8%) and pentanoic acid (5.35%). The higher 5-hydroxymethylfurfural yield obtained using ionic liquid loaded ZSM-5 was further compared to other studies (0–50%). In comparison to high-temperature HTL, catalytic HTL with ionic liquid loaded ZSM-5 led to lower activation energy requirements (31.93 kJ·mol −1 ) for the conversion of glucose into 5-HMF. Additionally, the catalysts showed excellent recyclability, with 19.68 wt% of bio-oil containing 59.6% of light oil obtained after 5 cycles. Hence, this study presents a novel approach for the catalytic conversion of lignocellulosic biomass into 5-HMF-rich bio-oil for energy and green chemistry applications.
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高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 6
·1-8
·
IF 5.705
Huang Huayu,Wang Mingxia,Wang Yang,Li Xinli,Niu Zhiying,Wang Xingyu,Song Jinxi
Molybdenum disulfide (MoS 2 ) was used as an electrically conductive skeleton and functionalized with an ionic liquid and gold/silver nanorods. The resulting composite was characterized by scanning electron microscopy, transmission electron microscopy and UV–vis spectroscopy. The composites were used to modify a glassy carbon electrode (GCE) to obtain a sensor for 2,4-dichlorophenol (2,4-DCP). The results show that the oxidation power and electrocatalytic activity of the modified GCE towards 2,4-DCP are enhanced compared to a bare GCE and other modified GCEs. Response is linear in the 0.01 to 50 μM 2,4-DCP concentration range, with a 2.6 nM detection limit. The sensor is highly sensitive and long-term stable. It was successfully applied to the determination of 2,4-DCP in spiked water samples and gave satisfactory recoveries.
Schematic of an electrochemical sensor for the differential pulse voltammetric (DPV) determination of 2,4-dichlorophenol. It is based on the use of an MoS 2 -ionic liquid-Au/Ag nanorod composite.
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高影响因子
POLYMER
·
2022
·
IF 4.432
Yu Li,Yuchi Liu,Lingyu Liu,Xiaopeng Zhao,Jianbo Yin
Solvent-free double network elastomers have excellent mechanical properties and stability. However, there are few studies on ion transport in solvent-free double network elastomers. In this paper, we prepared a kind of poly(ionic liquid) (PIL)-based solvent-free elastomer with double network structure by using crosslinked poly[2-(methacryloyloxy)ethyl] trimethyl ammonium bis(trifluoromethanesulfonyl) imine (P[VBTMA][TFSI]) network as brittle network and crosslinked poly(ethyl acrylate) (PEA) as stretchable network. The mechanical properties and the ion transport of samples as a function of elongation strain were investigated by stress-strain curves and broadband dielectric spectroscopy , respectively. The results show the double network elastomer has medium elastic modulus of 0.4–0.9 MPa, high elongation strain of 1700–2300% and ionic conductivity of 1.04 × 10 −7 S·m −1 at room temperature . When the sample does not yield, stretching almost does not affect the ion transport in the network. As the strain exceeds the yield point, the conductivity relaxation time of the samples with low crosslinking degree of PIL network increases little, while the conductivity relaxation time of the samples with high crosslinking degree increases significantly. This is because the former network breaks uniformly, while the latter appears phase separation when yielding. The result improves the understanding of ion transport in double network polyelectrolyte elastomers.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2014
·Vol. 406
·期 20
·4955-4963
·
IF 3.578
Wang Ting-Ting,Chen Yi-Hui,Ma Jun-Feng,Hu Min-Jie,Li Ying,Fang Jiang-Hua,Gao Hao-Qi
A novel ionic liquid-modified organic-polymer monolithic capillary column was prepared and used for in-tube solid-phase microextraction (SPME) of acidic food additives. The primary amino group of 1-aminopropyl-3-methylimidazolium chloride was reacted with the epoxide group of glycidyl methacrylate. The as-prepared new monomer was then copolymerized in situ with acrylamide and N , N’ -methylenebisacrylamide in the presence of polyethylene glycol (PEG)-8000 and PEG-10,000 as porogens. The extraction performance of the developed monolithic sorbent was evaluated for benzoic acid, 3-hydroxybenzoic acid, cinnamic acid, 2,4-dichlorophenoxyacetic acid, and 3-(trifluoromethyl)-cinnamic acid. Such a sorbent, bearing hydrophobic and anion-exchange groups, had high extraction efficiency towards the test compounds. The adsorption capacities for the analytes dissolved in water ranged from 0.18 to 1.74 μg cm −1 . Good linear calibration curves ( R
2 > 0.99) were obtained, and the limits of detection ( S / N = 3) for the analytes were found to be in the range 1.2–13.5 ng mL −1 . The recoveries of five acidic food additives spiked in Coca-Cola beverage samples ranged from 85.4 % to 98.3 %, with RSD less than 6.9 %. The excellent applicability of the ionic liquid (IL)-modified monolithic column was further tested by the determination of benzoic acid content in Sprite samples, further illustrating its good potential for analyzing food additives in complex samples.
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