Polymer Chemistry
·
2018
·Vol. 9
·期 37
·4674-4682
·
IF 4.927
Shi Wang,Xu Liu,Ailian Wang,Zhinan Wang,Jie Chen,Qinghui Zeng,Xuefei Wang,Liaoyun Zhang
Almost all the traditional ionic liquids lack liquid crystal properties. Only a small number of ionic liquids show liquid crystal properties, which can be named as ionic liquid crystals (ILCs). The liquid crystal characteristics of ILCs endow them with good ordering. More specifically, the ILC macroscopic alignment of phase-segregated ordered nanostructures can be considered as ion pathways and further fixed by photopolymerization to fabricate nanostructured ion-conductive electrolyte films. However, there are no reports using ILC-based solid polymer electrolytes (SPEs) for solid-state polymer lithium batteries (SSPLBs). Here, a free-standing and flexible SPE through photopolymerization of ILC/poly(ethylene glycol) diacrylate/poly(ethylene glycol) dimethyl ether/LiBF4 for SSPLBs was first designed and then successfully prepared. The as-obtained ILC-based SPE exhibits superior comprehensive electrochemical properties in terms of high ionic conductivity (1.96 × 10−4 S cm−1, 30 °C) and a wide electrochemical window (5.2 V). Particularly, the SPE delivers a high transference number of Li+ (0.6) due to the construction of ion channels for efficient transport of Li+. More importantly, the SPE also shows good interface contact with electrodes and can effectively suppress the growth of lithium dendrites. Thus, ILC-based SPE LiFePO4/Li cells present excellent long cycling stability (the average discharge capacity is ∼164 mA h g−1 with coulombic efficiency close to 100% throughout 375 cycles at 0.2 C) and superior rate capability at room temperature. Even at 0 °C, the SSPLBs can run very well. Our study opens a new way for ILC-based SPE to be practically applied in SSPLBs and also provides major progress on addressing the challenges of room temperature/low temperature SSPLBs.
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高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Liying Tian,Meihuang Wang,Ying Liu,Zhe Su,Bo Niu,Yayun Zhang,Panpan Dong,Donghui Long
PEO-based electrolytes are promising for solid-state lithium metal batteries , but their low ionic conductivity and unstable interfacial compatibility with electrodes are the bottlenecks restricting their further applications. Herein, a unique ionic liquid (Pyr 14 TFSI)-encapsulated cross-linked polymer electrolyte with abundant ether–oxygen repeat units (C-SPE-IL) is proposed and prepared through an in-situ thermal polymerization process. The Pyr 14 + cations of ionic liquid present a stronger affinity towards ether–oxygen groups by means of tight coordinated interactions, which promotes ionic liquid encapsulated uniformly in the polymer matrix to release more mobile Li ions into ionic liquid and create multiple ionic conduction highways in both ionic liquid and polymer matrix . The C-SPE-IL shows a much higher ionic conductivity of 3.98 × 10 −4 S/cm at 30 °C. Moreover, tight interfaces with LiF– and Li 3 N– rich components between C-SPE-IL and Li anode are constructed to ensure effective suppression of lithium dendrites during cycling. The LiFePO 4 /Li batteries using C-SPE-IL present stable cycling performances at both 35 °C and 60 °C. This work provides a facile and accessible approach to design novel SPE with both ionic conduction highways and good interfacial stability for high-performance solid-state lithium metal batteries .
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Ting-xu Wang,Si-ruo Chen,Ting Wang,Li-guang Wu,Yu-xing Wang
Polyethersulfone (PES) mixed-matrix membranes (MMMs) incorporating a co-nanofiller of ZIF-8 and poly(ionic liquid) were constructed via a facile one-pot microemulsion strategy, aiming to increase the flux and anti-fouling properties of the original PES membranes. First, ZIF-8 nanoparticles were synthetized in the reverse microemulsion using 1-butyl-3-methylimidazolium (BmimOTF) ionic liquid as a surfactant and 1-vinyl-3-ethylimidazolium tetrafluoroborate (VeimBF 4 ) polymerizable ionic liquid as an oil phase. Subsequently, the oil phase VeimBF 4 in the reverse microemulsion was polymerized, and a latex containing ZIF-8 nanoparticles and poly(VeimBF 4 ) was formed. Finally, MMMs were constructed by blending the latex with PES via the phase-inversion method. The microstructures of ZIF-8 and the MMMs were characterized by TEM, SEM, FTIR, XRD, and XPS analysis. Results showed that the mean size of ZIF-8 are small (10 ∼ 35 nm). Addition of the poly(VeimBF 4 ) and ZIF-8 nanoparticles increased the pore size and hydrophilicity of MMMs. The maximum water flux was 105 L m −2 ·h −1 ·bar −1 and 90% flux recovery were obtained after five cycles of filtration, and little decrease of WCA appeared on all MMMs after the repeated experiment, indicated the good stability of MMMs. Compared with PES ultrafiltration membrane, pure water flux and flux recovery rate of the MMMs increased by 15 and 2.8 times respectively.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2014
·
IF 4.258
Chunyan Chen,Xiaotong Liang,Jianping Wang,Ying Zou,Huiping Hu,Qingyun Cai,Shouzhuo Yao
A novel solid-phase microextraction (SPME) fiber was developed by chemical binding of a crosslinked polymeric ionic liquid (PIL) on the surface of an anodized Ti wire, and was applied in direct-immersion mode for the extraction of perfluorinated compounds (PFCs) from water samples coupled with high performance liquid chromatography–tandem mass spectrometry analysis. The PIL coatings were synthesized by using 1-vinyl-3-hexylimidazolium hexafluorophosphate as monomer and methylacryloyl-substituted polyhedral oligomeric silsesquioxane (POSS) as cross-linker via free radical reaction. The proposed fiber coating exhibited high mechanical stability due to the chemical bonding between the coating and the Ti wire surface. The integration of POSS reagent enhanced the organic solvent resistance of the coating. The parameters affecting the extraction performance of the fiber coating including extraction time, pH of solution, ionic strength and desorption conditions were optimized. The developed PIL-POSS fiber showed good linearity ( R < 0.998) between 0.1 and 50 ng mL −1 with method detection limits ranging from 0.005 to 0.08 ng mL −1 depending on the analyte, and with relative standard deviation for single-fiber repeatability and fiber-to-fiber reproducibility less than 8.6% and 9.5%, respectively.
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高影响因子
Royal Society Open Science
·
2021
·Vol. 8
·期 4
·
IF 2.963
Liang Zhou,Hongjian Li,Runlin Han
Hierarchical AlPO-34 molecular sieves microspheres were synthesized in a [BMIm]Br ionic liquid without template or complex post-treatment process. The formation mechanism of such framework structures and their morphology were investigated. [BMIm]Br was proven to serve as both solvent and sole provider of the structure directing agent. The organic amine in the compound affects the framework density of the crystals and promotes the formation of a chabazite (CHA) type framework. After ageing for 1 h the AlPO-34 microspheres are formed due to the aggregation properties of the ionic liquid. The hierarchical mirosphere has a relatively high Brunauer–Emmett–Teller surface area and a considerably uniform mesoporous channel network. The hierarchical AlPO-34 microspheres were used as absorbers of heavy metal cations and showed a higher loading capacity and distribution coefficient compared with the AlPO-34-NH.
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高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2015
·
IF 3.302
Zhijun Wang,Yuanchao Pei,Jing Zhao,Zhiyong Li,Yujuan Chen,Kelei Zhuo
Ionic-liquid (IL)-based aqueous two-phase systems (ATPSs) have attracted much attention in the separation technology. In this work, we synthesized five novel ether-functionalized ILs and studied their applications in ATPS formation. The phase diagrams for several systems were determined at 298.15 K. An as-prepared IL (1-(2-butoxy-ethyl)-3-methylimidazolium chloride) was chosen as a representative to construct ATPSs for separation of bovine serum albumin (BSA) from aqueous saccharide solutions. Results showed that 76.1–94.3% of BSA was enriched into the IL-rich top phase and almost all the saccharides were extracted into the salt-rich bottom phase in a one-step separation process. The main factors affecting the separation process, such as kinds of saccharides and the amount of inorganic salts, were discussed. Furthermore, the size distributions of aggregates in the IL-rich top phase were determined by dynamic light scattering (DLS), and accordingly the possible mechanism for the separation was investigated.
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高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Ke Shi,Hong Zhang,Yangzhongfu Yang,Yuelin Huang,Jikun Gao,Jiaqian Zhang,Guangfeng Kan,Yanxiao Jiang,Jie Jiang
Nanoplastics have attracted much attention due to their potential hazards. However, analysis of nanoplastics remains challenging. In this study, ionic liquid-assisted cloud-point extraction (IL-assisted CPE) was developed to enrich nanoplastics in the aqueous environment and further coupled with electromagnetic heating pyrolysis mass spectrometry. The use of trace ILs improves the extraction efficiency of CPE for nanoplastics. The effects of ILs (types, contents), nanoplastic properties (type, size), and environmental factors (aging time, humic acid content) were systematically investigated to evaluate the applicability. The limits of detection of poly(methyl methacrylate) (PMMA) and polystyrene (PS) were determined to be 1.78 and 2.67 μg/L, respectively. Real environmental samples including lake water, rainwater, and influent and effluent from wastewater treatment plant were analyzed with good accuracy (79.58–116.87%) and satisfactory precision (RSD ≤ 11.99%). A possible mechanism for ILs being absorbed into the ordered surfactant micellar and generating larger micelles to synergically enclose hydrophobic nanoplastics was proposed. This work provides a simple and efficient approach to the extraction and analysis of nanoplastics in aqueous environments.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yu Chen,Yiqian Yang,Gang Wang,Feng Huo,Chunshan Li
Microchannels and ionic liquids as media of process intensification have stimulated researchers’ attention. Herein, the effect of water on the physical properties, hydrodynamics, and mass transfer behavior of CO 2 -ionic liquid systems in microchannels was unraveled. The introduced water resulted in a significant reduction in viscosity, an increase in bubble size, a shift of the transition line between bubble and Taylor flow towards a low-speed region, and a transformation of bubble morphology from bullet-shaped to ideal bubbles. As a result, bubble length and gas–liquid contact area increased. However, the added water weakened the hydrogen-bond network structure of [BMIM]BF 4 in solutions, accelerated saturation of the liquid film, and reduced the mass transfer rate ( k L ). The predominant drop in k L caused a reduction in the liquid-phase volume mass transfer coefficient ( k L a ), even though the gas–liquid contact area ( a ) increased. Additionally, correlations for predicting bubble length and liquid-phase volume mass transfer coefficients were proposed.
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高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2025
·Vol. 48
·期 4
·e70125
·
IF 2.8
Sikai Wang,Yue Li,Lei Wang,Lin Lv,Hongmei Liu,Guoqi Zhang,Yan Zhao
In this study, a novel ionic liquid/chitosan bifunctionalized magnetic multi-walled carbon nanotubes composite material (m-MWCNTs@CS@IL) was utilized for the first time to immobilize lipase. The immobilized lipase exhibited exceptional stability and reusability, as evidenced by its characteristic properties. A ligand fishing approach utilizing the immobilized lipase was developed to enable rapid screening of lipase inhibitors from Chrysanthemum . Three ligands were successfully screened from Chrysanthemum and then identified as cynaroside, quercitrin, and linarin by ultra-high performance liquid chromatography-tandem mass spectrometry. The IC 50 values of these three ligands were 76.77 ± 0.36, 83.01 ± 0.46, and 43.61 ± 0.77 µM, respectively. Furthermore, molecular docking analysis further confirmed the binding of three ligands to specific amino acid residues within the active site of lipase. This work presents a fast and efficient approach for screening lipase inhibitors from intricate natural sources, demonstrating promising prospects in discovering anti-obesity compounds.
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产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 7
·1624-1632
·
IF 4.857
Yanqi Wang,Zhipeng Zhu,Zhaofeng Sun,Qianqian Hu,Jianrong Li,Jiang Jiang,Xiaoying Huang
Graphical Fine tweaking . Six heterometallic T5 selenides and their Se/S solid solutions M-In-Q (M=Cu or Cd; Q=Se or Se/S) have been solvothermally synthesized by a two-step method. The T5 selenide clusters, the largest supertetrahedral T n clusters reported to date, show photocatalytic activity that can be tuned according to their constituent components. Although supertetrahedral T n sulfide clusters ( n= 2–6) have been extensively explored, the synthesis of T n selenide clusters with n >4 has not been achieved thus far. Reported here are ionic-liquid (IL)-assisted precursor route syntheses, characterizations, and the photocatalytic properties of six new M-In-Q (M=Cu or Cd; Q=Se or Se/S) chalcogenide compounds, namely [Bmmim] 12 Cu 5 In 30 Q 52 Cl 3 (Im) (Q=Se ( T5-1 ), Se 48.5 S 3.5 ( T5-2 ); Bmmim=1-butyl-2,3-dimethylimidazolium, Im=imidazole), [Bmmim] 11 Cd 6 In 28 Q 52 Cl 3 (MIm) (Q=Se ( T5-3 ), Se 28.5 S 23.5 ( T5-4 ), Se 16 S 36 ( T5-5 ); MIm=1-methylimidazole), and [Bmmim] 9 Cd 6 In 28 Se 8 S 44 Cl(MIm) 3 ( T5-6 ). The cluster compounds T5-1 and T5-3 represent the largest molecular supertetrahedral T n selenide clusters to date. Under visible-light illumination, the Cu-In-Q compounds showed photocatalytic activity towards the decomposition of crystal violet, whereas the Cd-In-Q compounds exhibited good photocatalytic H 2 evolution activity. Interestingly, the experimental results show that the photocatalytic performances of the selenide/sulfide solid solutions were significantly better than those of their selenide analogues, for example, the degradation time of the organic dye with T5-2 was much shorter than that with T5-1 , whereas the photocatalytic H 2 evolution efficiencies with T5-3 – T5-6 improved significantly with increasing sulfur content. This work highlights the significance of IL-assisted precursor route synthesis and the tuning of photocatalytic properties through the formation of solid solutions.
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Wenbo Li,Yilin Wang,Dongchen Li,Jiachi Jiang,Kunlan Li,Kaili Zhang,Qingda An,Shangru Zhai,Ligang Wei
The oxidative depolymerization of alkali lignin (AL) in 1-ethyl-3-methylimidazolium acetate ([C 2 C 1 im]OAc) system without additional catalyst was investigated under mild conditions (initial O 2 pressure of 1.5 MPa, 80 °C–100 °C). Compared with other ionic liquids (ILs), the cooperation of imidazolium cation and acetate anion successfully enhanced AL conversion. Among the investigated imidazolium acetate ILs with ethyl- to octyl-side chains, [C 2 C 1 im]OAc presented the best catalytic capacity for AL oxidative depolymerization. Adding an appropriate amount of water to [C 2 C 1 im]OAc can further improve the reaction efficiency. In the [C 2 C 1 im]OAc system with the addition of 0.10–0.25 mL of water, approximately 77 wt% AL was depolymerized into small molecule soluble products at 100 °C for 2 h. The extracted oil was composed mainly of phenolic derived compounds. With the use of the [C 2 C 1 im]OAc-based system, the specific inter-unit linkages of lignin were broken down, and residual lignin with low molecular weight and narrow polydispersity index (1.88–1.96) was obtained. Compared with that in AL conversion with fresh [C 2 C 1 im]OAc, only a minimal decrease (~3.2%) was observed with the recovered IL until the fifth cycle. These findings revealed that [C 2 C 1 im]OAc–based system is a simple and efficient catalytic system for lignin oxidative depolymerization.
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DOI
PubMed
高影响因子
ACS Catalysis
·
2012
·
IF 0
Sasa Wang,Ling Wang,Marijana Đaković,Zora Popović,Haihong Wu,Ye Liu
A bifunctional ionic liquid (IL), bis-[N-(propyl-1-sulfoacid)-pyridinium] hexafluorotitanate (1), was synthesized and proved to be an efficient and recyclable catalyst for room temperature sulfoxidation of sulfides using H2O2 as the oxidant. The synergetic catalysis derived from the incorporated functional moieties in the IL structure was embodied in 1. The UV–vis and Raman spectra indicated that the remarkable catalytic performance of 1 was related to the easy generation and regeneration of the active peroxo-Ti species.
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危险品化学品经营许可证（带存储）