Journal of Energy Storage
·
2024
·
IF 8.9
Ying Gu,Xuwen Zheng,Zheng Zhou,Guangxin Chen,Shimou Chen,Qifang Li
Aqueous zinc ion batteries (AZIBs) are highly promising as large-scale energy storage devices with high capacity, safety, and low cost. However, the parasitic reaction on the of Zn anode and the growth of Zn dendrites greatly prevent the practical application of AZIBs. Here, we propose an effective strategy with hydrogel electrolytes by adding dual amphiphilic ionic liquids into acrylamide, allowing for the occurrence of the following phenomena related to the Zn anode: 1) Zn 2+ preferential adsorption by the amphiphilic ionic groups to regulate the electrodeposition behavior of Zn 2+ on the Zn(002) crystal surface and inhibit the growth of Zn dendrites; 2) water removal from the Zn 2+ solvation sheath, reducing water activity and inhibiting side reactions; 3) improved environmental adaptability of the hydrogel electrolyte through enhancing its mechanical properties and adhesion. The obtained hydrogel electrolyte has a high ionic conductivity of 41.47 mS/cm, a highly reversible Zn plating/stripping cycle of 1400 h in Zn||Zn symmetric batteries and an enhanced electrochemical performance in Zn||NVO full batteries (94 % capacity retention at 5.0 A g −1 /3000 cycles). Even under harsh conditions (10 mA cm −2 /10 mAh cm −2 ), these cells maintained excellent cycling stability. This study provides new ideas for the practical applications of AZIBs.
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CHINESE JOURNAL OF CATALYSIS
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2012
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IF 1.171
Yanhong BI,Zhaoyu WANG,Yanyong MAO,Shangyong ZHENG,Haijiang ZHANG,Hao SHI
The preparation of salidroside was successfully carried out in fourteen ionic liquids (ILs)-containing systems using β-glycosidase from black plum seeds for the first time. The optimum conditions were determined for C 6 MIm·BF 4 , pH, phosphate buffer content, and molar ratio of tyrosol to D-glucose to be 1% (v/v), 5.9, 20% (v/v), and 8:1, under which the initial reaction rate and yield were 3.3 mmol/(L·h) and 24.5%, respectively. Moreover, the effects of 1-alkylimidazolium-based ILs possessing different alkyl chain lengths from C 2 to C 10 and a variety of anions including BF 4 − , PF 6 − , Cl − , Br − , and I − on enzyme activity in co-solvent systems were investigated. The results indicate that the optimal chain length of the alkyl substituent on the imidazolium ring of the cation was C 6 . 摘要 研究了混合溶剂体系中阴离子分别为 BF 4 − , PF 6 − , Cl − , Br − 和 I − 的 14 种离子液体对来源于黑布林糖苷酶催化合成红景天苷反应的影响. 结果表明, 在最佳反应条件下, β-糖苷酶的反应初速度和红景天苷的产率分别为 3.3 mmol/(L·h) 和 24.5%. 离子液体咪唑阳离子的烷基链长 (C 2 ∼C 10 ) 对 β-糖苷酶的活性影响较大, 当烷基链长为 C 6 时, 糖苷酶表现出较高的催化活性.
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ELECTROPHORESIS
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2012
·Vol. 34
·期 2
·277-283
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IF 3.303
Libo Li,Hongwei Du,Huan Yu,Lei Xu,Tianyan You
CE coupled with amperometric detection method was developed using ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate (EMImBF 4 ) as additive for the simultaneous detection of clenbuterol (CLB), terbutaline (TER), and ractopamine (RAC) in feed. The effects of detection potential, concentration of EMImBF 4 , pH, and concentration of the running buffer, separation voltage as well as injection time on the separation and detection of these three β -agonists were investigated in detail. Under the optimum conditions: the detection potential at 1.05 V, 50 mmol/L Tris-HAc at pH 8.0 with 0.6% (v/v) EMImBF 4 , electrokinetic injection 6 s at 16 kV and separation voltage at 16 kV, a baseline separation for these three analytes could be achieved within 11 min. Introduction of EMImBF 4 into the running buffer resulted in significant improvement in separation selectivity and enhancement in peak currents for those β -agonists, especially for TER and RAC, which could not be separated in the running buffer without additive. The method exhibited wide linear range with LOD (S/N = 3) of 2, 1, and 2 nmol/L for CLB, TER, and RAC, respectively. The precision was determined in both intraday ( n = 5) and interday ( n = 3) assays, and the RSDs for both migration time and peak current were less than 6%. The proposed method was also applied to analyze β -agonists in feed sample.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2010
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IF 2.338
Tao Liu,Xiangbin Zhu,Lin Cui,Peng Ju,Xiangjin Qu,Shiyun Ai
A novel and reliable electrochemical sensor based on PbO 2 -carbon nanotubes-room temperature ionic liquid (i.e., 1-butyl-3-methylimidazolium hexafluorophosphate, BMIMPF6) composite film modified glassy carbon electrode (GCE) (PbO 2 –MWNT–RTIL/GCE) was proposed for simultaneous and individual determination of guanine and adenine . The guanine and adenine oxidation responses were monitored by differential pulse voltammetric (DPV) measurement. Compared with the bare electrode, the PbO 2 –MWNT–RTIL/GCE not only significantly enhanced the oxidation peak currents of guanine and adenine, but also lowered their oxidation overpotentials, suggesting that the synergistic effect of PbO 2 , MWNT and RTIL could dramatically improve the determining sensitivity of guanine and adenine. The PbO 2 –MWNT–RTIL/GCE showed good stability, high accumulation efficiency and enhanced electrocatalytic ability for the detection of guanine and adenine. Besides, the modified electrode also exhibited good behaviors in the simultaneous detection of adenine and guanine with the peak separation of 0.29 V in 0.1 M pH 7.0 phosphate buffer solution (PBS). Under the optimal conditions, the detection limit for individual determination of guanine and adenine was 6.0 × 10 −9 M and 3.0 × 10 −8 M ( S / N = 3), respectively. The proposed method for the measurements of guanine and adenine in herring sperm DNA was successfully applied with satisfactory results.
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Food and Bioprocess Technology
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2024
·
IF 5.3
Peng Lincai,Zhou Gaojin,Jiang Wanhang,Chen Yu,Wu Tong,Yuan Ke,Ali Ahmad,Yao Shun
In the context of potential applications in food field, a new glucose biosensor was constructed by combining the advantages of tropine-amino acid based ionic liquids (TABILs), glucose oxidase (GOx), silver nanoparticles and multi-walled carbon nanotubes (MWCNTs). The effect of various ILs on GOx and their intermolecular interactions were systematically discovered, and then the different modified electrodes were fabricated and evaluated. As the result, the TABIL formed by the cation of butyl substituted tropinol and anion of serine ([BuTr][Ser]) was found to be the most ideal; the [BuTr][Ser]/Ag/MWCNTs fabricated electrode exhibited the largest active area, which was 1.68 times larger than that of the bare electrode. After further optimization, the electrode was modified with 5 mg/mL of GOx to detect glucose in phosphate-buffered saline (PBS, pH = 7), at a working potential of −0.45 V and 25°C. The GOx coverage was 2.16×10 −9 mol/cm 2 , the electron transfer rate ( ks ) was 0.91 s −1 , and the Michaelis-Menten constant ( \({\text{K}}_{\text{m}}^{\text{app}}\) ) was 5.10 mM. The test results were satisfied for actual honey samples, indicating that it had the good performance for glucose detection in potential foods. Graphical
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TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Fan Xu,Haolin Li,Bingyu Tian,Kun Cui,Rui Dong,Mingjin Fan,Meirong Cai,Feng Zhou,Weimin Liu
Introducing functional ILs into the water-glycol system can significantly improve its lubrication and corrosion resistance, therefore, it is meaningful to investigate the interaction between IL and the interface or water-ethylene glycol system. Herein, we designed two IL additives to achieve the construction of water-glycol lubricating system. The unique interfacial behavior between the IL and the sliding asperity makes it critical to the friction reduction and anti-wear effect. And the adsorbed layer with certain viscosity and elastic modulus was obtained on the metal surface, which is ascribed to the strong hydrogen bonding network structure and a hydration layer, thus showing excellent load-bearing capacity. Additionally, the tribofilm formed on the friction pair behave superior mechanical properties (high Young's modulus and hardness).
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Hanlin Zeng,Jingdong Peng,Huanjun Peng,Hanqi Yang,Xiang Wang,Zhiqiang Xu,Wenhao Chen
This work prepared two dicationic ionic liquid stationary phases for mixed-mode chromatography via thioe-ene click reaction, one of which was post-modified by p-tolyl isocyanate . The successful synthesis of two stationary phases was demonstrated by several characterizations. The separation of a wide range of substances, including nucleosides and bases, alkylbenzene, polycyclic aromatic hydrocarbons, anilines, phenols, inorganic anions and organic acids, shows that homemade stationary phases can not only be applie to RPLC/HILIC/IEC mixed-mode chromatography, but also has better separation selectivity than commercial column. Therefore, the post-modification of p-tolyl isocyanate can greatly improve the separation effect in RPLC mode, which proves that this modification method is of research significance. The retention mechanisms of two stationary phases were investigated by varying the chromatographic conditions and linear solvation energy relationships (LSER). In addition, the stationary phase is able to detect preservatives in foods quickly and accurately. In actual sample testing, the limit of detection ≤ 0.074mg·L −1 and the inter-day precision was not more than 3.33 %.
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POLYMER ENGINEERING AND SCIENCE
·
2025
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IF 3.2
Dingjun Zhang,Jia Zeng,Meiju Zhang,Huajian Sun,Yanzhen Li
Polyacrylamide-based gel microspheres have low compressive strength and relatively poor thermal stability, which makes them susceptible to mechanical stress damage and prone to degradation or dissolution in high-temperature environments, thereby limiting their application under such conditions. In this study, an imidazolium-based characteristic was incorporated into the acrylamide-acrylic acid (AA) system to synthesize a gel with enhanced compressive strength and stability. Firstly, a one-step method was used to synthesize a bipartite vinyl imidazolium bromide ionic liquid, using N -vinyl imidazole and 1,8-dibromooctane. Secondly, polymer gel microspheres (P(AA-AM-ILs)) were designed and synthesized using the microfluidic technique and titration gel method, with acrylamide (AM), AA, and β-hydroxyethyl methacrylate as raw materials, and potassium persulfate as the initiator. The morphology and structure of the polymer gel microspheres were characterized, and the effects of the ionic liquid cross-linker content on the water-absorbing properties and compressive strength of the gel microspheres were investigated. At 800°C, the gel microspheres did not fully decompose, indicating that the material possessed high stability. When the ionic liquid cross-linker content was 15%, the water absorption ratio reached its highest value at various temperatures, consistently exceeding 3.5 mm mm −1 . Additionally, it exhibited excellent aging resistance, maintaining a compressive strength of 110 kPa after being immersed at 70°C for 120 days, suggesting its suitability for long-term use. Highlights Imidazole ionic liquids cross-linking exhibits excellent thermal properties. For P(AA-AM-ILs), excellent stability and compressive strength. The appropriate content of ionic liquid cross-linkers significantly improves the gel performance.
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MICROCHEMICAL JOURNAL
·
2024
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IF 4.9
Zarfashan Shahid,Bairong Fu,Saima Rehman,Zia Ahmad,Jiping Chen,Xianbo Lu
Bisphenol compounds, including BPA and BPS, are significant pollutants found in the environment, food, and daily necessities. They pose various adverse effects, including estrogenic, immunotoxic, metabolic, and reproductive toxicity, which severely threaten human health and ecological safety. Achieving simultaneous rapid detection of BPA and BPS is still very challenging due to their similar structures and co-existence in actual samples at ultratrace level. This study addresses the problem of developing an effective method for the rapid detection of BPA and BPS simultaneously. A new electrochemical nanosensor based on ionic liquid (IL) coupled Zr-MOF@GO was developed for ultrasensitive real-time detection of BPA and BPS. The Zr-MOF@GO/IL nanocomposite features a custom-built structure with an ordered framework, abundant pores, and highly coupled interfaces. The experimental findings demonstrate that the introduction of IL enhances the conductivity and dispersibility of the nanocomposite, improves the absorption capability for target bisphenols, and significantly improves the detection limit and linear range of the Zr-MOF@GO based electrochemical sensor. The sensor demonstrated wide linear ranges with detection limits of 5.5 nmol/L for BPA and 7.1 nmol/L for BPS (S/N = 3), respectively. Comparative studies revealed that the detection limits of the Zr-MOF@GO/IL-based sensor improved by an order of magnitude compared to the Zr-MOF@GO-based sensor. Additionally, the sensor exhibited superior analytical performance regarding reproducibility, stability, and selectivity. This study investigated the capability and synergy of IL coupled high-valent stable transition metal Zr IV -based MOFs in electrochemical sensing for the first time. This development sets a new benchmark in non-enzymatic electrochemical sensing, establishing the Zr-MOF@GO/IL-based sensor as a promising platform for the individual or simultaneous rapid detection of bisphenols in actual samples.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Xu Fu,Tianyou Mao,Ying Wang,Ligang Wei,Jian Sun,Na Liu,Qingda An,Ling-Ping Xiao,Guolin Shao
Magnetic lignin nanoparticles (MLNs) were prepared by inducing their self-assembly through lignin regeneration in the [ N -methyl-2-pyrrolidone][C1–C4 carboxylic acid] ionic liquids ([NMP]ILs), which are low-cost protic ionic liquid. [NMP]ILs are self-assembling solvent that can enhance the adsorption capacity of MLNs to a greater degree than tetrahydrofuran or H 2 O. Additionally, the anion types of [NMP]IL greatly influence the physiochemical properties of MLNs. The MLNs prepared through self-assembly with [NMP][formate] (MLN/[NMP][For]) exhibited a higher maximum adsorption capacity (134.53 mg/g) than the [NMP]ILs of C2–C4 carboxylate anions. MLN/[NMP][For] demonstrated stable adsorption within a pH range of 6–10 or at high salt concentrations (0.01–0.5 mol/L), retaining over 80 % of its regeneration efficiency after 5 cycles. In addition, MLN/[NMP][For] selectively removed cationic dyes in mixed binary anionic–cationic dye solutions. This work demonstrated the feasibility of preparing magnetic biosorbents with good selectivity and stability though regeneration and by adjusting the anions of ionic liquids.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Hao Wang,Xintong Zhang,Zhencai Zhang,Yiwen Zhang,Zhao Yang,Wentao Zhang,Chunshan Li,Fei Xu
The advancement of biobased polymers is intrinsically linked to the optimization of polymerization catalyst design. This necessitates a comprehensive understanding of the structure–effect relationship and the control mechanisms inherent in these catalysts. Recent studies have demonstrated the potential of ionic liquid (IL) catalysts to activate glucose-derived diol isosorbide (ISB), which could overcome the challenge of low and imbalanced hydroxyl activity of ISB. However, the microscopic mechanism of IL-catalyzed melt polycondensation remains elusive, lacking a well-established foundation for the rational design of IL catalysts. Using the melt polycondensation of ISB as a model, this study combines computational and experimental investigations to reveal that IL-catalyzed melt polycondensation follows an addition–elimination mechanism. ILs can alter the mechanistic pathway by forming tetrahedral intermediates, thereby reducing the energy barrier for both the exo- and endo-OH routes. Additionally, cationic functionalization can significantly regulate the electrophilicity and nucleophilicity of ILs, as well as stabilize transition states by C–H bonds and π electrons in the cationic ring. The optimal catalyst 1-ethyl-2-methylpyridinium bromide ([1-C2-2-C1Py]Br) achieves the product with Mw of 133.9 kg/mol, which is due to the modification of cations by a weak electron-donating group enhancing π···π weak interactions. This research contributes a theoretical foundation for IL-catalyzed polycondensation processes and catalyst designs, thereby offering a perspective for quantum chemistry-driven investigations in biobased polymer science, and further promotes the development of sustainable, eco-friendly materials and processes in the context of green chemistry and renewable resources.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Ke Wu,Zhimin Yang,Sen Liu,Xishuang Liang,Teng Fei,Tong Zhang
Numerous applications require low humidity sensors that not only sensitive but also stable, small hysteresis, high resolution and fast response. However, most reported low humidity sensors cannot possess these properties at the same time. In this work, inspired by sea urchin , we developed an ionic liquid (IL) modified metal organic framework (UiO-66) based low humidity sensor. Owing to the synergistic effect of the hydrophilicity and ionic conductivity of IL and the steric hindrance effects of UiO-66, the optimized low humidity sensor simultaneously exhibits high response (47.5), small hysteresis (0.3 % RH), ultrafast response speed (0.2 s), high resolution (1 % RH), and excellent long-term stability (>120 days). In particular, the sensor has been proved to have potential applications in visual humidity detection and water source location. This work provides a preliminary design principle that will contribute to the preparation of high-performance low humidity sensing materials.
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高影响因子
危险品化学品经营许可证（带存储）