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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JOURNAL OF MOLECULAR LIQUIDS
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2025
·
IF 5.2
Zi-Quan Wang,Ya-Peng Du,Xiao-Ping Zheng,Yu Chai,Yu-Cang Zhang,Yan-Zhen Zheng
The direct conversion of raw lignocellulosic waste into specialty chemicals such as levulinic acid (LA) has the potential to significantly enhance biorefinery profitability. Here, we demonstrated that incorporating γ-valerolactone (GVL) as a co-solvent during the SO 3 H-functionalized ionic liquid-catalyzed conversion of bagasse in water markedly enhanced reaction rates and catalytic activity, achieving a LA yield as high as 76.1 % with a 1:1 vol ratio of GVL to water. This catalytic system also effectively converted other lignocellulosic waste to LA. Reaction constants and activation energies for the bagasse dehydration process to LA were obtained. Comprehensive characterization via Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD) elucidated significant changes in functional groups, surface morphology, and crystallinity index of solid residues over extended reaction times. Notably, hemicellulose and cellulose were converted within 4 h, with lignin remaining in the solid residues and forming by-products after prolonged reaction times. This efficient one-pot conversion method showed promise as a sustainable approach to transform agricultural waste into LA, offering new opportunities for eco-friendly resource utilization.
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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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EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Yue Yao,Kexin Xu,Jingyi Liu,Dongsheng Li,Baoxin Ni,Guangcheng Zhang,Xuetao Shi
The primary challenge in developing highly sensitive skin-inspired polymeric sensors with superior strength, toughness, and exceptional self-healing capabilities is the inherent brittleness of the polymer matrix, with the difficulty in constructing efficient charge transport pathways. This study proposed a new type of cross-linked ionic poly(urea-urethane) (PUU) synthesized by strategically incorporating ionic bonds into PUU matrix combining the dynamic cross-linking mechanisms of hindered urea bonds and hydrogen bonds. These materials use electrostatic interactions between the polymer network and ILs to form stable ion transport channels, effectively addressing the liquid leakage issue inherent in conventional ionogels. The synthesized PUU material exhibited outstanding mechanical properties, featuring tensile strength of 13.0 MPa and elongation at break of about 1270 %. More importantly, the PUU network displayed excellent ionic liquid affinity (contact angle of 48.5°) and high self-healing efficiency (80.8 % at 60 °C). Furthermore, flexible sensors constructed by incorporating ionic liquids (ILs) into PUU with special microstructures presented high sensitivity (−6.5 kPa −1 ), rapid response time (48 ms), and moderate detection range (0.08–4 kPa), enabling precise monitoring of human activities. These multifunctional cross-linked PUU elastomers demonstrate significant potential for applications in robust self-healing materials as well as in resistive pressure sensors.
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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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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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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 6
·6148-6156
·
IF 2.195
Xiao Mingjun,Meng Yanshuang,Duan Chaoyu,Zhu Fuliang,Zhang Yue
Co 3 O 4 /Nitrogen doped carbon (Co 3 O 4 /NDC) composite is successfully prepared using 1-butyl-3-methylimidazolium dicyanamide ([BMIm]N(CN) 2 ) as carbon and nitrogen sources. The properties of Co 3 O 4 /NDC composite and bare Co 3 O 4 are systematically characterized by X-ray diffraction, Raman spectrum, transmission electron microscopy (TEM), and scanning electron microscopy. TEM result indicates that the Co 3 O 4 particles are coated with a layer of nitrogen doped carbon film, with can enhance its conductivity and alleviate the volume effect. The results of electrochemical tests show that the discharge specific capacity of Co 3 O 4 /NDC composite is 1088 mAh g −1 of 0.1 C (1 C = 890 mA g −1 ) after 100 cycles. Compared to Co 3 O 4 /NDC composite, the discharge specific capacity of bare Co 3 O 4 is 628 mAh g −1 of 0.1 C after 100 cycles. The enhanced electeochemical properties can be attributed to the nitrogen doped carbon film that prevents the structure from being destroyed during lithium ion (Li + ) insertion/deinsertion process and improves the conductivity.
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CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yi Cao,Shuaifeng Lou,Zhen Sun,Weiping Tang,Yulin Ma,Pengjian Zuo,Jiajun Wang,Chunyu Du,Yunzhi Gao,Geping Yin
Solid-state lithium batteries (SSLBs) exhibit numerous advantages including high safety, high energy density and power density, etc., and therefore become the most promising candidate for next-generation batteries. However, constructing an intimate contact within the composite electrode and the electrode/electrolyte interface via simple mixing and cold-pressing processes is still challenging. Herein, a novel fabrication process for homogeneous composite electrodes used in SSLBs is successfully demonstrated. An in-situ liquid-phase approach employing the [Li(triglyme)] + [TFSI] - (LiG3) solvent-salt complex with excellent stability to modify the sulfide-based solid-state electrolyte interfaces, is introduced into the SSLBs system, which enables SSLBs to work efficiently at lower external pressures. The quasi-solid-state prototype cells with Li 4 Ti 5 O 12 (LTO) active material deliver excellent room-temperature performance, generating a super high capacity of 160 mA h g −1 and high capacity retention of 91.4% for 1500 cycles under 0.25 C. This work gives new insight into the interface engineering, processing and more positive impact on the industrial production of SSLBs.
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POLYMER BULLETIN
·
2014
·Vol. 71
·期 5
·1173-1195
·
IF 1.491
Ren Hui-xue,Ying Han-jie,Sun You-min,Wu Dao-ji,Ma Yong-shan,Wei Xiao-feng
Poly(lactic acid)–poly(ethylene glycol) copolymers were synthesized under the catalysis of multi-SO 3 H-functionalized ionic liquid. Compared to the ordinary ionic liquids and the traditional Lewis acid catalysts, the ionic liquids with multi-sulfonic acid groups were more catalytically active, and the reaction conversion rate reached up to 97.8 %. The molecular weight of the resulting copolymer was 5.69 × 10 4 g mol −1 and the degree of crystallinity was 42.9 %. The copolymers were also of higher hydrophilicity and better mechanical properties. The reaction kinetics of copolymerization was analyzed. The intrinsically high catalytic activity of multi-SO 3 H groups originated from the lower activation energy and the higher free acidity. The recovering catalytic activity of the multi-SO 3 H ionic liquid catalyst was higher, suggesting that it is a recyclable, environmentally friendly catalyst.
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RSC Advances
·
2013
·Vol. 3
·期 43
·20077-20084
·
IF 2.562
Jing Cuan,Bing Yan
Benzoate (4-hydroxybenzoate, 4-mercaptobenzoate and 4-aminobenzoate) functionalized polymer resin (Merrifield resin (MR) or Wang resin (WR)) and mesoporous silica SBA-15 are connected to assemble photofunctional hybrids by bridging lanthanide ions (Gd3+, Eu3+) through coordination bonds. The organically functionalized mesoporous SBA-15 are synthesized by co-condensation of tetraethoxysilane (TEOS) and modified by organic coupling agent 3-methacryloxypropyltrimethoxy-silane (denoted as MPTMS) in the presence of Pluronic P123 surfactant as a template. Europium polyoxometalates (Na9EuW10O36·32H2O, abbreviated as Na9EuW10) are encapsulated into the composite host through an ionic liquid (1-methyl-3-(trimethoxysilylpropyl) imidazolium) as a double linker, which is fixed on the surface of mesoporous SBA-15. The detailed physical characterization of these photofunctional hybrids are characterized by Fourier Transform Infrared (FTIR), X-ray diffraction (XRD), Thermo-gravimetric Analysis (TGA), Transmission Electron Micrographs (TEM), N2 absorption and desorption and luminescent performance. It is worth pointing out that some hybrids possess high luminescent output (quantum yields) and long decay time (reaching the millisecond scale) and cool-white light (from CIE diagrams). The research provides a strategy to assemble multi-component hybrids to realize the cool-white integration.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Qinming Wang,Jinlin Wan,Sen Wu,Xingfu Zhou
Commercially available carbon was used instead of the noble metals. • The grain size of the perovskite was doubly increased and grain boundaries were reduced by [C 6 Py]BF 4 modification. • [C 6 Py]BF 4 modification reduces the non-radiative recombination and enhances the charge transport. • The carbon-based device modified with 0.3 vol% [C 6 Py]BF 4 achieved an optimized efficiency of 15.42%. Additive engineering is one of the key strategies for enhancing the performance of perovskite solar cells. The ionic liquid 1-hexylpyridinium tetrafluoroborate ([C 6 Py]BF 4 ) was employed as an additive in the perovskite precursor solution. [C 6 Py]BF 4 can regulate the crystallization process of the perovskite. Meanwhile, N in the pyridinium group, possessing a lone electron pair, acts as a hydrogen bond acceptor, forming N-H···I hydrogen bonds with the I − in the perovskite. The formation of hydrogen bonds stabilizes the position of I − , suppressing its migration. Additionally, the BF 4 − passivates defects by coordinating with undercoordinated Pb 2+ . SEM characterization revealed that the perovskite films modified with [C 6 Py]BF 4 exhibited a doubling of grain size and a reduction in grain boundaries, resulting in a significant decrease in the defect density within the devices. Consequently, non-radiative recombination was suppressed, ion migration was mitigated, and charge carrier lifetime was improved. At the optimal concentration of 0.3 vol%, the power conversion efficiency of the device reached 15.42%, representing an 8.5% enhancement compared to the pristine device. Furthermore, the hysteresis effect was significantly reduced, and the long-term stability of the device was improved. The ionic liquid 1-hexylpyridinium tetrafluoroborate ([C 6 Py]BF 4 ) was employed as an additive in the perovskite precursor solution. After modification with [C 6 Py]BF 4 , the grain size of the perovskite film was significantly doubly increased, while grain boundaries were reduced, leading to a substantial decrease in defect density within the device. Consequently, non-radiative recombination was suppressed, ion migration was mitigated, and charge carrier lifetime was improved. At the optimal concentration of 0.3 vol%, the power conversion efficiency (PCE) of the device reached 15.42%, representing an 8.5% enhancement compared to the pristine device. Furthermore, the hysteresis effect was significantly reduced, and the long-term stability of the device was improved. Download: Download high-res image (148KB) Download: Download full-size image
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Inventions
·
2026
·Vol. 11
·期 3
·57
·
IF 2.4
Fenglin Zhang,Die Chen,Luo Zhang,Chenxia Zhao,Ming Zhang,Xinyi Li,Ting He,Zimiao Lu,Xiaohong He,Gengpei Xia,Dingyu Yang
Aqueous zinc-ion batteries (AZIBs) are promising for grid-scale storage due to their safety, low cost, and environmental benignity. However, water-dipole enrichment in the inner Helmholtz plane (IHP) of Zn anodes triggers hydrogen evolution, corrosion, and dendrites, limiting cycle life. We report a trace “ionic liquid–polar solvent coupling” strategy: adding only 0.01 M EMIMBF4and 0.03 M DMSO to 2 M ZnSO4electrolyte. Hydrophobic EMIM+adsorbs on the IHP to expel interfacial water, while BF4−enters the primary solvation shell and DMSO penetrates both first and second shells of Zn2+, forming a water-deficient coordination environment. This interfacial–solvation synergy suppresses parasitic reactions and directs preferentially oriented Zn deposition exclusively along the (101) facet, enabling dense vertical plating and in situ formation of a compact, inorganic-rich SEI (ZnCO3–ZnSO3–Zn(OH)2). Consequently, Zn||Zn cells cycle stably for >5362 h at 1 mA cm−2/1 mAh cm−2; Zn||Cu cells achieve 1300 cycles with 99.8% average Coulombic efficiency; and Zn||V2O5full cells retain 326.4 mAh g−1after 500 cycles. This work shows that minimal additive loading can simultaneously engineer the electrode–electrolyte interface and crystallographic deposition pathway, offering a simple yet robust design for ultra-stable AZIBs.
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