Food Analytical Methods
·
2016
·Vol. 10
·期 6
·1653-1660
·
IF 2.167
Wang Xiaojun,Chen Peng,Cao Liang,Xu Guoliang,Yang Siyu,Fang Ye,Wang Guozhen,Hong Xincheng
A novel and sensitive magnetic ionic liquid-based up-and-down-shaker-assisted dispersive liquid-liquid microextraction (MIL-UDSA-DLLME) was developed for the graphite furnace atomic absorption spectrometric measurement of inorganic selenium speciation from various rice matrixes. In the first microextraction step, the magnetic ionic liquid (1-butyl-3-methylimidazolium tetrachloroferrate, [C 4 mim][FeCl 4 ]) was selected to extract the complex of Se(IV) and 2,3-diaminonaphthalene from aqueous solution by the assistance of up-and-down-shaker vortex agitator. After the microextraction step, the magnetic ionic liquid containing target analytes was collected at the bottom of the tube by applying an external magnetic field around the test tube. Under the optimized conditions, the method present has low detection limit (0.018 μg L −1 ), wide linear dynamic range (0.03–10 μg L −1 ), and good repeatability (<3.0%, n = 10) for Se(IV). The proposed methodology was applied for separation and preconcentration of inorganic selenium in standard reference materials including GBW10010 rice, GBW10043 Liaoning rice, and GBW10045 Hunan rice with satisfactory results. The developed methodology was also successfully used for the speciation of Se(IV) and Se(VI) in different rice samples with the relative recoveries within the acceptable range of 94.9–104.8% for the addition recovery tests.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Jonas Hilário,Berlinda Marcos Macucule,Peng Wang,Wei Yu,Chuizhou Meng
The need for wearable electronics has remarkably increased due to the fast development of flexible tactile sensors with the unique capability of responding to external pressure stimuli while maintaining a high degree of deformability. To meet the practical wearable sensing requirement, outstanding sensitivity and a wide detection range are always highly desired. Herein, we report the design and fabrication of a flexible iontronic tactile sensor based on a stretchable silver nanowire (AgNW)/Ecoflex composite film with a sandpaper-roughened surface as the electron-conductive electrode and a porous polyurethane (PU)/poly(vinylidene fluoride) hexafluoropropylene copolymer (PVDF)/1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF4]) composite foam as the ion-conductive electrolyte through a facile dip-coating method. Because of the supercapacitive sensing mechanism and the surface and internal microstructures, an ultrahigh sensitivity of 422.22 kPa–1 and a maximum wide detection range of 80 kPa are simultaneously achieved after thorough compositional and structural optimization. Toward practical wearable sensing applications, the developed iontronic tactile sensor is demonstrated to be capable of detecting various subtle and large pressures caused by different parts of the human body, such as wrist pulse, swallowing, speaking, and bending of the finger, wrist, and elbow. The proposed material and structure strategy would provide a concept and methodology for the development of sensors with excellent performance.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiaming Mao,Yuhui Ci,Jia Liu,Chang Li,Wenjuan Yang,Yanbin Yun,Guicheng Liu,Meng Li,Manxiang Wang
To break through the “trade-off” effect of biphasic solvents between rich-phase viscosity and CO 2 loading, we synthesized a novel ionic liquid (diethylenetriamine-3-hydroxypyridine, [DETA][3HPyr]) with multiple active sites and combined it with the organic solvent diethylene glycol monobutyl ether (DGME) and water to prepare a biphasic solvent for CO 2 absorption, the best absorption condition was optimized. The results demonstrated that after absorption, the solvent transformed from homogeneous to biphasic with highly self-concentrated absorption products in the rich phase. The volume of the rich phase accounted for only 36.3 % of the total solvent, while its viscosity decreased significantly to 28.1 mPa·s, with a high blend absorption capacity of 2.67 mol·kg −1 . The species of absorption product and absorption mechanism was investigated using 13 C NMR. The stable presence of carbamic acid in the system was confirmed, contributing to enhanced absorption capacity. Density functional theory calculations revealed that DGME stabilized carbamic acid through intermolecular hydrogen bonding interactions, and highly polar ions generated during absorption and uneven charge distribution between ions dominated the phase-change process and increased the water content in the rich phase. Thermodynamic energy barrier calculation showed that the solvent effect of DGME reduced the Gibbs free energy barriers of proton transfer and facilitated reaction progress. 3IL4D3H exhibited excellent cyclic performance with low regeneration energy consumption at 1.77 GJ·t −1 . This is the first work to revealing the intrinsic dynamics of carbamic acid formation, and provides a new perspective for the phase-change mechanism of ionic liquid-based biphasic solvent.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Han Jia,Qiang Wang,Hui Yan,Guopeng Wu,Jiaxin Li,Zhihao Shen,Han Sun,Pingan Pei,Haidong Jia,Dexin Liu
The ionic liquids (ILs) are regarded as the ideal candidate for the novel and high-efficiency corrosion inhibitors. While the cost problem caused by relatively large dosage limited the wide employments of conventional ILs. In the current study, we synthesized two novel phosphorus-based ionic liquids (PBILs) with different alkyl chain length (dodecyltriphenylphosphonium bromide (C 12 TPB) and cetyltriphenylphosphonium bromide (C 16 TPB)), and evaluated their anticorrosion efficiencies for mild steel (MS) in 1 M HCl aqueous solution by weight loss measurement, scanning electron microscope, X-ray photoelectron spectroscopy and electrochemical test. The results revealed that PBILs performed excellently (inhibition efficiencies > 93 %) at a very low concentration of 10 μM, which was much greater than those for traditional imidazole and pyridine ionic liquids at 500 μM. It was demonstrated that PBILs could adsorb on the metal surface to form the protective film, which should be mixed corrosion inhibitors with cathodic advantage. Then the adsorption study and molecular dynamics simulation confirmed that their special molecular structure highly promoted the intensity of the adsorption film mainly caused by the chemical adsorption. This study provided a novel approach for the structural design and development of high-performance IL corrosion inhibitors.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2018
·Vol. 410
·期 12
·2921-2935
·
IF 3.307
Wu Jia,Xu Zilin,Pan Yixuan,Shi Yi,Bao Xiujie,Li Jun,Tong Yu,Tang Han,Ma Shuyan,Wang Xuedong,Lyu Jianxin
Herein, a novel magnetic effervescence tablet-assisted microextraction coupled to in situ metathesis reaction of ionic liquid (IS-META-ILDM) is presented for the determination of four endogenous steroids in human urine, pregnant women’s blood, and fetal umbilical cord blood. The magnetic effervescent tablets, which were composed of Fe 3 O 4 nanoparticles, sodium carbonate (alkaline source), and tartaric acid (acidic source), were used to disperse the extractant and for convenient magnetic separation. After the effervescent reaction, in situ reaction between NH 4 PF 6 and [C 6 MIM]BF 4 was adopted to change hydrophilic ionic liquid to hydrophobic liquid, which could be separated from the aqueous phase. The newly developed method has three obvious advantages: (1) combination of effervescent dispersion and magnetic nanoparticles’ retrieval is cost-effective and the dispersion and collection of the extractant can be completed almost simultaneously; (2) as compared to temperature-controlled ionic liquid dispersive microextraction and cold-induced solidified microextraction, this method avoids a heating and cooling process which significantly reduces the extraction time and energy cost; and (3) the combination of adsorption by magnetic nanoparticles with extraction by in situ metathesis reaction easily produces high recoveries for target analytes. The optimized composition of effervescent tablet and experimental parameters are as follows: 0.64 g mixture of sodium carbonate and tartaric acid, 7 mg of Fe 3 O 4 (20 nm) as magnetic sorbents, 40 μL of [C 6 MIM]BF 4 as the extraction solvent, 0.15 g NH 4 PF 6 , and 300 μL of elution solvent. Under the optimized conditions, the newly developed method provided high extraction recoveries (90.0–118.5%) and low LODs (0.14–0.17 μg L −1 ) in urine and blood samples. In total, this IS-META-ILDM method provided high extraction efficiency, fast and convenient separation, and underutilization of any organic solvent, and thus it has great potential for the determination of trace endogenous steroids in complex human fluids.
The newly developed method has three obvious advantages: combination of effervescent dispersion and magnetic nanoparticles’ retrieval is cost-effective and the dispersion and collection of the extractant can be completed almost simultaneously. It avoids a heating and cooling process which significantly reduces the extraction time and energy cost and easily produces high recoveries for target analytes
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Mingshu Xie,Zeyu Zhang,Yicheng Wang,Fan Jiang,Hao Tang,Jiuqiang Li,Shuhong Jiao,Jingyi Qiu,Jing Peng,Xibang Chen,Maolin Zhai
Lithium metal batteries exhibit ultrahigh theoretical capacity but face critical challenges in cycling stability and safety due to lithium dendrite growth and dead lithium formation. Herein, a UiO-66/imidazolium-based poly(ionic liquid) (UiO/PPV-Li) gel electrolyte was synthesized through γ-ray radiation-induced in-situ polymerization and crosslinking using 1-vinyl-3-ethylimidazolium hexafluorophosphate ionic liquid ([VEIm]PF 6 ) monomer, pentaerythritol tetraacrylate (PET4A) crosslinker, and UiO-66 dispersed in liquid electrolyte. Enhanced Li + transport was achieved through dipole-ion interactions between [VEIm] + cations and carbonyl groups of PET4A and complemented by dynamic coupling between PET4A and anions. The optimized UiO/PPV-Li exhibited an ionic conductivity of 9.12 mS·cm –1 at ambient temperature. The electrochemical stability window was extended to 5.31 V (vs. Li⁺/Li) through coordination of PF 6 – with Zr–O clusters in the UiO-66 structure. The desolvation energy barrier of solvated Li + was effectively reduced by UiO-66 and optimized hopping sites for Li⁺ transport provided by polymer chains were identified through theoretical calculation. Li ‖ UiO/PPV-Li ‖ LiNi 0.8 Co 0.1 Mn 0.1 O 2 exhibited discharge specific capacity of 154 mAh·g −1 at 1 C (75.7% retention), enhanced cycle stability at 4.8 V and superior high-rate discharge capacities compared to liquid electrolytes. Significant safety improvements were exhibited through flame retardancy and structural integrity of UiO/PPV-Li. The graphite ‖ UiO/PPV-Li ‖ LiCoO 2 pouch batteries exhibited high safety under calendering and nail penetration. The UiO/PPV-Li in-situ synthesized through γ-ray radiation-induced polymerization and crosslinking is a novel strategy for the development of next-generation lithium metal batteries.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Bo Hu,Wei Wei,Fengxia Liu,Xiaofei Xu,Zhiyi Li,Zhijun Liu
To achieve superior regeneration properties of the CO 2 -rich phase without additional auxiliary measures in biphasic CO 2 absorbents (e.g., N 2 purging or co-activators), a dual-functionalized ionic liquid biphasic solvent of N-Aminoethylpiperazine-Lysine/N-Propanol/water ([AEPH][Lys]/NPA/H 2 O) was designed for CO 2 capture. It demonstrates a remarkable CO 2 loading of 1.847 mol·mol −1 , while the rich volume being only 53.0 % of the total absorbent and the viscosity as low as 6.10 mPa·s. Remarkably, 87.26 % regeneration efficiency was achieved under 393.15 K for 40 min without additives, and the regenerated lower phase could homogeneously recombine with the upper phase. After 10 cycles, regeneration efficiency remained at 84.67 %, while energy consumption was only 1.90 GJ·ton -1 CO 2 (49.87 % lower than MEA). 13 C NMR revealed that bicarbonate/carbonate dominated the CO 2 products, as well as some carbamates and a small amount of propyl carbonates. The reaction pathways of bicarbonates/carbonate based on quantum chemical calculations were indicated that through base-catalyzed hydration of tertiary amines on AEPH + cations, hydrolysis of carbamates and the reaction of water with CO 2 . The bicarbonate/carbonate exhibits lower thermal stability than carbamates, facilitating efficient regeneration. Based on MPI index, solvation-free energy and weak intermolecular interactions analysis, the solubility of CO 2 products in water is higher than NPA. This absorbent demonstrates significant potential for industrial CO 2 capture applications.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Qiao Feng Wang,Ming Sun,Jiang Bing Sun,Jun Zhou
A novel and efficient method of surfactant-assisted temperature-controlled solidification ionic liquid dispersion liquid–liquid microextraction (SA-TCS-IL-DLLME) has been developed for the preconcentration and determination of trace five phthalate esters in bottled water. The analysis was completed by ultra-high performance liquid chromatography (UHPLC). In this study, hydrophobic low-density solid quaternary phosphonate ionic liquid ([P 44412 ] BF 4 ) was used as extractant while surfactant Tergitol TMN-6 was employed as dispersant. The dispersion of the extractant in the sample solution was promoted by water bath and vortex. At the same time, the temperature was controlled to transform the extractant from liquid to solid. Then, the separation of the extractant and the sample solution was achieved. Incidentally, extraction of the analyte was also finished. Important parameters which affected SA-TCS-IL-DLLME efficiency, such as the type and volume of extractant and dispersant, the amount of salt, the vortex time and pH value were investigated and optimized by single factor experiments. Under these optimized conditions, the method exhibited linearity ranges of 0.01–1.0 ng mL −1 with correlation coefficients between 0.9994 and 0.9998. The method’s intra-day ( n = 6) and inter-day ( n = 6) precision levels were maintained at ≤ 3.37 %, which was considered to be within acceptable limits. The computed detection and quantification limits were 16.54–24.60 and 54.91–82.04 ng mL −1 , respectively. Above all, this optimized method was effectively employed to extract five phthalate esters from bottled water with recoveries ranging from 94.83 % to 98.72 %. It can be used for rapid analysis and detection of phthalate esters in bottled water samples.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2017
·
IF 3.981
Jingtang Li,Tao Yu,Guangfu Xu,Yingxiang Du,Zongran Liu,Zijie Feng,Xuan Yang,Ying Xi,Jie Liu
Recently,ionic liquids (ILs) functionalized cyclodextrins (CDs) have attracted more and more attention in the fields of enantioseparation. In this study, a novel IL amino triazolium functionalized β-CD derivative, mono-6-deoxy-6-(4-amino-1,2,4-triazolium)-β-cyclodextrin chloride (4-ATMCDCl), was synthesized for the first time and managed to separate dansyl amino acids and naproxen by capillary electrophoresis (CE). Compared with native β-CD, the new selector exhibited good water solubility and enhanced enantioselectivity. Several crucial parameters such as selector concentration, buffer pH, and applied voltage were systematically investigated. The molecular docking program Autodock was applied to further demonstrate the mechanism of chiral recognition and the enhanced enantioselectivity of 4-ATMCDCl, which showed good agreement with our experimental results.
✓ 已验证
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2024
·
IF 5.2
Gongheng Zhang,Fengxiang Yin,Gideon Kofie,Qiuyue Gao,Jie Zhang,Guoru Li,Biaohua Chen
ZIF-67(CoFe) was synthesized using the solvothermal method , and the precursor of ZIF-67(CoFe)/xC-yIL was obtained by grinding the mixture of ZIF-67(CoFe), [BMIM][NTf 2 ] ionic liquid (IL), and carbon black. A series of ZIF-67(CoFe)/xC-yIL-T catalysts were prepared by calcining the precursor at different temperatures. The structure of the catalysts was examined using XRD , TEM, BET and XPS analysis. The results show that the high-temperature treatment of the precursor contributes to the formation of the structure of the N, S-co-doped carbon-coated nanoparticles . The introduction of ionic liquid increases the specific surface area of the catalysts and exposes more active sites. At the same time, as a sulfur source, ionic liquid forms a C-S bond, which is conducive to improving ORR activity. The optimal ORR half-wave potential and limited current density of ZIF-67(CoFe)/1.5 C-45IL-600 are 0.87 V vs. RHE and 4.64 mA cm -2 , respectively, in 0.1 mol L −1 KOH.
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Xinlin Zhu,Zhao Fang,Qinghua Deng,Yang Zhou,Xiaolong Fu,Lizhi Wu,Wuwei Yan,Yong Yang
PEO-based solid electrolytes are eagerly anticipated for being explored in batteries with remarkable performance. Their narrower electrochemical window and weak mechanical strength, however, limit the potential for wide application in safe and high-capacity electronic devices. Herein, a self-healing solid-state electrolyte (PEO@BPIL) is fabricated by the incorporation of an imidazolium-based polymerized ionic liquid (poly(ethylene glycol) monomethacrylate (PEGMA)) block polymer into PEO, and the influence of copolymer configuration on electrochemical performances of the system is investigated in-depth. In addition to reducing the crystallinity of PEO, an inimitable orderly and orderless microphase separation structure is introduced in PEO@BPIL, which brings about a “green fast track” for Li-ion migration. This contributes to a lithium-ion transference number of 0.63 that is an unsurpassed level. The electrochemical stability window of the optimized PEO@BPIL can achieve 5.0 V (vs Li+/Li). As a result, the capacity and endurance discharge performances for PEO@BPIL based cells are significantly improved. Moreover, the bountiful charged ions on the scaffold endue the electrolyte with generous interactions, conferring the PEO@BPIL predominant adhesiveness toward lithium metal (the hanging weight = 200 g) and standout self-healing ability (recovering time <30 min, 60 °C). The restriction toward lithium dendrite is thus enhanced. The PEO@BPIL-based laminate polymer battery presents ascendant antifolding deformation ability and still exhibits good electrochemical performances after reiterative damage. In combination with the high flame retardancy of polymerized ionic liquid, this work affords a splendid idea for an emerging power supply battery.
✓ 已验证
DOI
高影响因子
TALANTA
·
2015
·
IF 3.545
Meseret Amde,Jing-Fu Liu,Zhi-Qiang Tan,Deribachew Bekana
Zinc oxide nanofluid (ZnO-NF) based vortex assisted liquid liquid microextraction (ZnO-NF VA-LLME) was developed and employed in extraction of inorganic mercury (Hg 2+ ) in environmental water samples, followed by cold vapor atomic fluorescence spectrometry (CV-AFS). Unlike other dispersive liquid liquid microextraction techniques, ZnO-NF VA-LLME is free of volatile organic solvents and dispersive solvent consumption. Analytical signals were obtained without back-extraction from the ZnO-NF phase prior to CV-AFS determination. Some essential parameters of the ZnO-NF VA-LLME and cold vapor generation such as composition and volume of the nanofluid, vortexing time, pH of the sample solution, amount of the chelating agent, ionic strength and matrix interferences have been studied. Under optimal conditions, efficient extraction of 1 ng/mL of Hg 2+ in 10 mL of sample solution was achieved using 50 μL of ZnO-NF. The enrichment factor before dilution, detection limits and limits of quantification of the method were about 190, 0.019 and 0.064 ng/mL, respectively. The intra and inter days relative standard deviations (n=8) were found to be 4.6% and 7.8%, respectively, at 1 ng/mL spiking level. The accuracy of the current method was also evaluated by the analysis of certified reference materials, and the measured Hg 2+ concentration of GBW08603 (9.6 ng/mL) and GBW(E)080392 (8.9 ng/mL) agreed well with their certified value (10 ng/mL). The method was applied to the analysis of Hg 2+ in effluent, influent, lake and river water samples, with recoveries in the range of 79.8–92.8% and 83.6–106.1% at 1 ng/mL and 5 ng/mL spiking levels, respectively. Overall, ZnO-NF VA-LLME is fast, simple, cost-effective and environmentally friendly and it can be employed for efficient enrichment of the analyte from various water samples.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）