JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2020
·Vol. 325
·期 2
·673-682
·
IF 1.137
Liu Bing,Jia Yongzhong,Jing Yan,Zhang Quanyou,Shao Fei,Yao Ying
Abstract The lithium isotope separation (LIS) plays a vital role in development of nuclear industry. The liquid–liquid extraction technologies open up new possibilities for LIS. This work presents preliminary results of the study on the extractions and separation of 6 Li/ 7 Li by mixed system, comprising amino-derivatives of benzo-15-crown-5 (4AB), ionic liquid and anisole. 4AB was used as an extractant. The eparation factor ( α ) is 1.031 ± 0.001, and abundance of 6 Li in loaded organic phase is 7.76%. Meanwhile, the reason why 4AB has better separation efficiency than B15C5 was explored brief by Fourier transform infrared (FT-IR) spectrum and quantum chemical calculations. Graphic abstract
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高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 9
·1-9
·
IF 5.479
Li Xinli,Niu Zhiying,Lin Zhenfeng,Qin Yuan,Xu Jingxi,Huang Huayu,Wang Liancheng,Zhang Jianjian,Xu Zhigang
Boron nitride (BN) was used as a support and covered with an ionic liquid (IL) and tungsten disulfide (WS 2 ) nanoparticles to obtain an electrode for the determination of 4-aminophenol (4-AP). BN was prepared using a “solvent cutting” method, and the BN-IL-WS 2 nanocomposite was obtained by an ultrasonic method. BN and its hybrids were characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffraction. When the BN-IL-WS 2 composites were coated on the surface of the electrode, the response to 4-AP was strongly amplified due to the strong synergetic effect between the three materials. The voltammetric response of the modified sensor (with a maximum at 0.29 V vs. Ag/AgCl) in solutions with a pH of 6 is linear in the 0.01–50 μΜ 4-AP concentration range, and the limit of detection is 3 nM. A modified glassy carbon electrode was applied for the determination of 4-AP in seawater and dispersions containing paracetamol tablets. The results were consistent with those obtained by HPLC.
Schematic representation of the voltammetric determination process of 4-aminophenol (4-AP). The electrochemical sensor based on the glassy carbon electrode modified with boron nitride (BN), ionic liquid (IL) and tungsten disulfide (WS 2 ) nanomaterials. They, exhibit an excellent performance compared with other electrodes.
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PubMed
高影响因子
JOURNAL OF ANALYTICAL CHEMISTRY
·
2020
·Vol. 75
·期 11
·1430-1434
·
IF 0.84
Yuling Gao,Liang Xilong,Sun Peng,Guo Yongxia
Abstract A novel method for the determination of butachlor and fipronil in liquid milk has been developed using ionic liquid dispersive liquid-liquid microextraction coupled with ultra-high performance liquid chromatography ( UHPLC ). The optimum extraction conditions were determined to be 60 μL of 1-octyl-3-methyl imidazole six fluorine phosphate extraction solvent, 1000 μL of acetonitrile as the dispersing solvent, vortex extraction time of 3 min, centrifugation for 5 min at room temperature at 10 000 rpm. After extraction, 30 μL of extraction solvent was obtained from the sample for UHPLC analysis. It was shown that good linearity was obtained with butachlor and fipronil concentrations from 5 to 1000 μg/kg with correlation coefficient of 0.999. The average recoveries were in the range of 90 to 104% at spiked levels from 10 to 50 μg/kg with intra-day relative standard deviations lower than 3.7% ( n = 6) and inter-day relative standard deviations lower than 6.1% ( n = 3). The limits of detection were 0.5 and 0.3 μg/kg for butachlor and fipronil, respectively.
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Analytical Methods
·
2014
·Vol. 7
·期 2
·607-613
·
IF 1.938
Ligai Bai,Jiafei Wang,Hang Zhang,Sha Liu,Junxiao Qin,Haiyan Liu
A novel polymer-based monolith for high performance liquid chromatography was fabricated via atom transfer radical polymerization without the expensive complexing ligand, in which methyl methacrylate was used as the monomer, vinyl ester resin as a cross-linker, 1-butyl-3-methylimidazolium chloride/dodecanol as the porogen, carbon tetrachloride as the initiator and ferrous chloride as the catalytic agent. The morphology of the monolith was studied using scanning electronic microscopy. The chemical groups of the monolith were assayed using the infrared spectroscopy method. The pore size distribution was determined using a mercury porosimeter and nitrogen absorption–desorption isotherms. The monolith was used to separate lysozyme from chicken egg white in a short time with good resolution and reproducibility. The effects of pH and buffer concentration on elution have been investigated. In addition, the monolith was used to separate a mixture of proteins (bovine serum albumin, papain and lysozyme) and aromatic compounds with good resolution.
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高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 11
·期 3
·1301-1311
·
IF 14.511
Yan Yuan,Xiuping Peng,Bin Wang,Kesi Xue,Zhengqian Li,Yitian Ma,Bin Zheng,Yonghui Song,Hai Lu
Solid-state lithium metal batteries have great application prospects due to their high theoretical energy density but are restricted by the low ionic conductivity of the solid electrolyte and unsatisfactory interface chemistry between the electrode and electrolyte. Herein, a novel solid polymer electrolyte (SPE) was obtained by incorporating a solvate ionic liquid (SIL) [Li(G4)1][TFSI] containing LiBOB as a functional additive into the polymer matrix. Profiting from the synergistic effect of the SIL and the Li+ conductive salt, the uniquely designed SPE has high ionic conductivity, wide electrochemical window, high Li+ transference number and excellent compatibility with metallic Li. Accordingly, it endows the solid-state lithium metal battery with superior long-term cyclability at room temperature. The addition of LiBOB not only improves the Li+ coordination and conductive environment, but also contributes to the rigid-flexible coupling interface chemistry to buffer the volume change in Li metal upon cycling and achieve homogeneous and dendrite-free Li deposition.
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高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Xuejing Liu,Yaoyao Zhang,Shangde Sun
Caffeic acid (CA), as a potential green antioxidant, plays an important role in food processing. However, the low liposolubility of CA limits its applications. To overcome this issue, CA is normally modified by introducing a lipophilic group, such as alkyl alcohols, resulting in the formation of alkyl caffeate, which can significantly enhance the liposolubility of CA. In this study, a binuclear ionic liquid , 1,1-bis(2-pyrrolidinone) sulfate ([C 3 (Hnhp) 2 ][HSO 4 ] 2 ), is successfully synthesized and characterized by FT-IR and 1 H NMR. The physico-chemical properties of [C 3 (Hnhp) 2 ][HSO 4 ] 2 , including the density, viscosity, thermal stability and Brønsted acidity, were analyzed. As a novel catalyst for the esterification of CA with model dodecanol , its catalytic performance was investigated and optimized by response surface methodology. Under the optimal conditions, a 95.42 ± 1.01% yield of dodecanol caffeate was achieved. Moreover, the [C 3 (Hnhp) 2 ][HSO 4 ] 2 exhibits excellent stability and reusability, making it a highly promising catalyst for the synthesis of various lipophilic alkyl caffeates.
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PubMed
高影响因子
GREEN CHEMISTRY
·
2020
·Vol. 23
·期 1
·447-456
·
IF 9.48
Zifeng Yang,Xue Li,Fei Xu,Weiwei Wang,Yongqing Shi,Zhencai Zhang,Wenjuan Fang,Lei Liu,Suojiang Zhang
The synthesis of green products using renewable bio-monomers has become a research trend with the requirement of sustainable development. In this work, we reported a green pathway to synthesize poly(isosorbide carbonate) (PIC) via one-step melt polycondensation of biomass-derived isosorbide (ISB) and CO2-derived dimethyl carbonate (DMC) catalyzed by eco-friendly dual site-functionalized ionic liquids; a series of these catalysts were synthesized for the first time to the best of our knowledge and their effects on the molecular weight and terminal groups of PIC were systematically investigated. The results showed that the steric structure of cations and anions of catalysts could significantly influence their catalytic performance in polymer synthesis reactions. Meanwhile, it was found that the ability of catalysts to activate the reaction substrate gradually increased with decreasing steric hindrance of cations and anions. Among our exploited ionic liquid catalysts, the selectivity of carboxymethylated products was increased significantly by using bis-tetraethylammonium hydroquinone ([N2222]2 [HQ]), and a PIC with a weight average molecular weight (Mw) of 53 600 along with an ISB conversion up to 99.0% was obtained. As far as we know, the catalyst of [N2222]2 [HQ] was the most efficient catalyst for PIC one-step synthesis compared with the existing traditional ionic liquid catalysts. Besides, according to the detected intermediates of the reaction process and the results of various analytical means, a possible mechanism for the synergetic catalysis of cations–anions promoting the chain growth was proposed.
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MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 9
·3565-3572
·
IF 4.58
Li Mingshi,Wang Yanying,Ye Xiaoxue,Wang Zhengguo,Wu Tsunghsueh,Li Chunya
Icosahedral gold nanocrystals (AuNCs) were synthesized by using the ionic liquid (IL) 1-(10-bromodecyl)-3-methyl-imidazolium bromide as a morphology-controlling reagent. The novel IL 1,3-di-(3-mercaptopropyl)-imidazolium bromide was employed as a bifunctional monomer to integrate the AuNCs onto the surface of a glassy carbon electrode (GCE) modified with gold nanoparticles. After interaction with thioglycolic acid (TGA) and activation of the carboxy groups, the antibody against squamous cell carcinoma antigen was immobilized on the modified GCE. Residual active sites were blocked with bovine serum albumin. The new materials and the steps for immunosensor fabrication were fully characterized. The reduction in peak current (using hexacyanoferrate as an electrochemical probe) due to the recognition of SCCA is linearly related to the SCCA concentration in the 0.02 to 10 ng mL −1 concentration range. The detection limit is as low as 12.6 pg mL −1 (at an S/N ratio of 3). The assay was applied to the quantitation of SCCA in human serum samples. The accuracy was validated by comparison with an ELISA method. The two methods displayed excellent consistency.
Icosahedral gold nanocrystals were self-assembled onto a gold nanoparticle modified glassy carbon electrode surface by using 1,3-di-(3-mercaptopropyl)-imidazolium bromide ionic liquid as a linker. Antibody for squamous cell carcinoma antigen was immobilized onto the gold nanocrystal based interface to fabricate an immunosensor.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaoli Liang,Longzhang Niu,Jinhan Song,Zhoujing Chen,Hongwang Qu,Didi Wen,Yuqi Li,Lina Niu,Yongkang Bai
Flexible sensors are increasingly vital for next-generation wearable electronics, yet conventional materials such as hydrogels and ionogels often suffer from freezing, evaporation, and liquid leakage, limiting their reliability in complex environmental conditions. In this study, a poly(ionic liquid) (PIL) gel was successfully synthesized via the polymerization of 1-vinyl-3-butylimidazolium hexafluorophosphate (BVIM-PF₆) in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM-TFSI). The resulting gel synergistically combines the advantageous properties of ionic liquids with the three-dimensional porous structure of a gel matrix, exhibiting excellent ionic liquid retention capability. Benefiting from abundant intrinsic electrostatic interactions and hydrogen bonding, this PIL gel demonstrates excellent tensile strain (~270.7 %), notable fatigue resistance, and self-healing capability. Additionally, owing to the inherent antimicrobial properties of the ionic liquid, the gel also exhibits significant antibacterial efficacy. A strain sensor fabricated from this PIL gel shows real-time, rapid, and stable sensing performance, with a gauge factor (GF) of 6.20 and a response time of 318 ms. Moreover, a triboelectric nanogenerator (TENG) assembled using the PIL gel demonstrates outstanding energy-harvesting performance. Operating as a self-powered sensor integrated with deep learning algorithms, it enables smart infant monitoring and early hazard prediction. This work highlights the significant potential of PIL gels as advanced materials for next-generation flexible sensors.
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Xianglong Wang,Baolin Liu,Shiqiang Wang,Hongtao Xie,Ya Zha,Xueli Huang,Diogo M.F. Santos,Yizhao Li
Rational design of electrodes from suitable materials is vital for developing supercapacitors . Herein, oxygen self-doped hierarchical porous carbons (OHPCs) are prepared by a two-step heat treatment using coal liquefaction residues (CLR) and potassium hydroxide (KOH) as raw material and activation agent, respectively. The oxygen-containing functional group undergoes a redox reaction during the energy storage process to increase the pseudocapacitance when OHPC is used as electrode material for supercapacitor . Density functional theory (DFT) calculations show that the doping oxygen species in carbon enhances the adsorption to the electrolyte and provides a fast electron transfer pathway. The OHPC-600 (obtained at 600ºC) presents high specific capacitance of 457 F g −1 at 0.5 A g −1 , superior rate capability with capacitance of 261 F g −1 at 50 A g −1 . The assembled symmetric supercapacitors also exhibit outstanding cycling life with 93% retention over 10000 cycles at 4 A g −1 Moreover, when the aqueous electrolyte is replaced by an organic electrolyte or ionic liquid , this device delivers a remarkable energy density of 35.2 Wh kg −1 and 46.5 Wh kg −1 at a power density of 10000 W kg −1 , respectively. This study provides a reference for the prepare of novel carbon-based electrode materials and the effective exploitation of coal resources for energy storage.
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高影响因子
MICROCHEMICAL JOURNAL
·
2017
·
IF 3.034
Wei Yu,Kai Li,Zhongling Liu,Hanqi Zhang,Xiangqun Jin
Ionic liquid/anionic surfactant aqueous two-phase system was developed and applied for the extraction of sulfonamides in blood. High-performance liquid chromatography was applied to the determination of the analytes. The blood sample was centrifuged and added to sodium dodecyl sulfate (SDS), ionic liquid 1-Hexyl-3-MethylImidazolium Chloride([C 6 MIM] Cl), K 2 HPO 4 . After the resulting mixture was ultrasonically shaken and centrifuged, the aqueous two phase system was formed and analytes were extracted into the upper phase. The parameters affecting the extraction efficiency, such as volume of ionic liquid, amount of sodium dodecyl sulfate, ionic strength , pH value of system, extraction time and temperature were investigated. The limits of detection of Sulfamethyldiazine (SMZ), Sulfamethizole (STZ), sulfachlorpyridazine (SCP), sulfamethoxazole (SMX) and Sulfisoxazole (SSZ) were 3.29, 4.13, 3.74, 2.45 and 3.60 μg L − 1 , respectively. When the present method was applied to the analysis of real blood samples, the recoveries of analytes ranged from 85.5 to 110.9% and relative standard deviations were lower than 6.9%.
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高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Wei Bao,Weizhen Fan,Jin Luo,Shikang Huo,Zhenyuan Hu,Xiao Jing,Weijie Chen,Xinyang Long,Yunfeng Zhang
Developing a poly(ethylene oxide) (PEO)-based polymer electrolyte with high ionic conductivity and robust mechanical property is beneficial for real applications of all-solid-state lithium metal batteries (ASSLMBs). Herein, an excellent organic/inorganic interface compatibility of all-solid-state composite polymer electrolytes (CPEs) is achieved using a novel imidazolium-type poly(ionic liquid) with strong electrostatic interactions, providing insights into the achievement of highly stable CPEs. The key properties such as micromorphologies, thermal behavior, crystallinity, tLi+, mechanical property, lithium anode surficial morphology, and electrochemical performance are systematically investigated. The combined experimental and density functional theory (DFT) simulation results exhibit that the strong electrostatic interaction and ion–dipole interaction cooperated to improve the compatibility of the CPE, with a high ionic conductivity of 1.46 × 10–4 S cm–1 at 40 °C and an incredible mechanical strain of 2000% for dendrite-free and highly stable all-solid-state LMBs. This work affords a promising strategy to accelerate the development of PEO-based polymer electrolytes for real applications in ASSLMBs.
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高影响因子
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