ELECTROCHEMISTRY COMMUNICATIONS
·
2021
·
IF 4.724
Xin Zhang,Aimin Liu,Fengguo Liu,Zhongning Shi,Baoguo Zhang,Xu Wang
An aluminum-containing solvate ionic liquid, DMI–AlCl 3 (1 M)–MgCl 2 (0.5 M) was used as the electrolyte for magnesium electrodeposition. The results of Raman spectroscopy and 27 Al nuclear magnetic resonance spectroscopy indicated the existence of aluminum-containing [AlCl 4 ] - and [AlCl 2 (DMI) 4 ] + in the DMI–AlCl 3 (1 M) system. When 0.5 M MgCl 2 was added to DMI–AlCl 3 , the Mg(II) species was [MgCl(DMI) n ] + . X-ray diffraction analysis indicated that a coating of Al 3 Mg 2 can be prepared by potentiostatic electrodeposition at −1.45 V (vs. Al) at 323 K on a copper sheet cathode.
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DOI
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ULTRASONICS SONOCHEMISTRY
·
2025
·
IF 9.7
Liwei Niu,Siwen Zhang,Xiaoyu Si,Yuhan Fang,Shuang Wang,Lulu Li,Zunlai Sheng
This study investigates the potential of ionic liquids (ILs) as sustainable solvents in ultrasonic-assisted extraction (UAE) to efficiently recover luteolin from peanut shells. Among the range of ILs tested, 1-butyl-3-methylimidazolium tetrafluoroborate stood out as the most effective solvent, achieving the highest extraction yield. Single-factor experiments were conducted to analyze the effects of ultrasonic power, extraction time, extraction temperature, IL concentration, and solid-to-liquid ratio on extraction efficiency. Further optimization of the extraction conditions was performed using response surface methodology and neural network analysis, resulting in a significantly enhanced luteolin yield of 3.71 ± 0.06 mg/g. Interaction energy analyses were conducted to elucidate the interactions between ILs and luteolin, confirming the experimental findings and highlighting the strongest interaction energy between 1-butyl-3-methylimidazolium tetrafluoroborate and luteolin. A kinetic model for luteolin extraction was developed, demonstrating that the extraction process follows a second-order rate model, where the extraction rate is directly proportional to the square of the concentration difference between luteolin and the solvent. The outcomes of this research present an efficient protocol for luteolin extraction and provide novel insights into the application of UAE in extracting natural products.
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Hao Dai,Ziyi Deng,Yanbo Zeng,Jian Zhang,Yiwen Yang,Qinyan Ma,Wenling Hu,Longhua Guo,Lei Li,Shulin Wan,Haiying Liu
A coumarin-based fluorescent molecularly imprinted poly (ionic liquid) (FL-MIPIL) was prepared using a new coumarin-based alkenyl fluorescent ionic liquid (coumarin-FL-IL) as the functional monomer, IL [V 2 C 4 (mim) 2 ][(PF 6 ) 2 ] and ethyleneglycol dimethacrylate as the cross-linkers, and 4-NP as the template molecule. The absolute quantum yields of coumarin-FL-IL and FL-MIPIL were 7.26 % and 30.66 %, respectively. As a result of the electron transfer between coumarin-FL-IL which contains amino groups and 4-NP bearing hydroxyl groups, FL-MIPIL fluorescence was effectively quenched by 4-NP. The prepared FL-MIPIL sensor can rapidly respond to 4-NP within 60 s. The FL-MIPIL sensor had good linear response to 4-NP from 0.001–7.5 μM and low detection limit of 0.5 nM (S/N = 3). The FL-MIPIL sensor exhibited high sensitivity and good selectivity for 4-NP. The outstanding performance of FL-MIPIL could be ascribed to high fluorescence intensity of FL-MIPIL without matrixes and more interactions between FL-MIPIL and 4-NP. The FL-MIPIL sensor has successfully applied to the determination of 4-NP in lake, rain and waste water samples, river sediment, soil and urine samples.
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2015
·
IF 4.513
Youhong Ai,Faqiong Zhao,Baizhao Zeng
A novel proton-type ionic liquid doped polyaniline (HIL-doped PANI) coating was presented, which was prepared on a stainless steel wire by electrodeposition in an aqueous solution containing aniline and 1-sulfobutyl-3-methylimidazolium hydrosulfate. The HIL-doped PANI coating showed granular nanostructure and had large specific surface. When it was applied to the headspace solid-phase microextraction of several amines (i.e., aniline, N -methylaniline, 3-methylaniline, 2-chloroaniline and 3-chloroaniline), it showed high extraction efficiency. The enrichment factors were 191.8–343.9 for different amines, much higher than those of common PANI and commercial polydimethylsiloxane/divinylbenzene coatings. Coupled with gas chromatographic analysis, the linear ranges were 0.097–100 μg/L with correlation coefficients above 0.9942, and the detection limits were 0.012–0.048 μg/L (S/N = 3) for different amines. The relative standard deviations (RSD) were smaller than 8.1% for five successive measurements with single fiber and the fiber-to-fiber RSDs were 8.6–13.8% ( n = 5) for these amines. The proposed method was successfully applied to the extraction and determination of amines in organic waste water samples, and the recoveries were 78.3–112.8% for different analytes.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lei Yuan,Leihao Zhang,Jianpeng Feng,Chongyang Jiang,Jiaqi Feng,Chunshan Li,Shaojuan Zeng,Xiangping Zhang
Electric-driven CO 2 reduction to high value-added chemicals is a potential way to solve the carbon emissions. However, the current studies on CO 2 electroreduction (CO 2 ER) are mainly focused on design and preparation of novel electrocatalysts and electrolytes. The large-scale of CO 2 ER is puzzled in the serious hydrogen evolution reaction (HER) in aqueous electrolytes and inferior reaction stability in an enlarged CO 2 electrolyzer. Ionic liquids (ILs) as electrolytes have opened great opportunities for CO 2 ER due to their unique advantages. Herein, a large-scale CO 2 ER device containing an upscaling modified H-type flow cell using IL-based electrolytes (UHFC-IL) with the largest electrode active area of 495 cm 2 was established for CO 2 ER studies. The influences of key operating parameters, such as compositions of IL-based electrolytes, electrolytes velocity, CO 2 gas flow rate and cell voltage on CO 2 ER performance were systematically investigated. A high CO 2 ER performance under the optimum operating conditions achieves 83.9% Faraday Efficiency (FE) for CO with a reaction current of 6.32 A, suppressing HER to only 2% FE. After 10 hr continuous operation, the CO selectivity in IL-based electrolytes is 51.3% higher than that in 0.1 M KHCO 3 aqueous electrolytes, which maintains excellent stability with a high CO generation rate of 1.7 L hr -1 . In addition, the mechanism of CO 2 ER to CO boosted by IL-based electrolytes in UHFC-IL was proposed. This study provides experimental parameters and guidance for future research on the amplification process of CO 2 ER.
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CARBOHYDRATE POLYMERS
·
2012
·
IF 3.628
Yihao Luan,Jinming Zhang,Maosheng Zhan,Jin Wu,Jun Zhang,Jiasong He
Using 4-dimethylaminopyridine (DMAP) as the catalyst, highly efficient propionylation and butyralation of cellulose were successfully carried out in an ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl) under mild conditions. Cellulose propionate (CP) and cellulose butyrate (CB) with a degree of substitution (DS) in the range from 0.89 to 2.89 were synthesized within only 30 min at 30 °C. The DS values of the products could be well controlled just by molar ratio of acid anhydride/anhydroglucose unit (AGU). More interestingly, the conversions of acid anhydrides in both propionylation and butyralation were as high as above 90%, even 96%. Therefore, this work provides a facile and highly efficient way for the synthesis of cellulose esters CP and CB.
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DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Leqing He,Shuangbai Li,Chongpin Huang
In the context of composite materials that elude classification via conventional pretreatment methodologies such as crushing, granulating, and flotation—specifically within the domains of food packaging, construction materials, and engineering plastics—this research employed a one-step methanolysis-separation technique for the graded recycling of polypropylene (PP), polyethylene (PE), and polyethylene terephthalate (PET) in mixed plastics. Employing methanol as the reaction solvent, the benign and eco-friendly ionic liquid BMIMOH as the catalyst for the degradation of PET. PET was methanolized to produce dimethyl terephthalate (DMT), while PP and PE remained highly stable, were separated after the reaction, and subjected to subsequent recycling. The stability of PP and PE under methanolysis conditions was revealed through structural and thermodynamic analyses. Single-factor analysis and response surface methodology were employed to determine the optimal conditions for the methanolysis reaction. Additionally, the impact of different contents of PP and PE on the recovery of PET from the mixed plastics during the swelling-condensation process at high temperatures was explored. Under the optimal conditions, the yield of DMT was 94 % for the degradation of single PET, and when the ratio of PET in the mixed plastics was 50 %, the yield of DMT could still reach 90 %.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Zhanpeng Jiang,Zeyu Zhang,Yuetong Lin,Jingyi He,Xiaohang Liu,Jiuyin Pang
In a novel solvent system consisting of lithium salt/ionic liquid, glycidyl methacrylate (GMA) was grafted onto the surface of soybean protein using atom transfer radical polymerization (ATRP), resulting in the preparation of a soybean protein-based graft copolymer. To establish a strong interfacial force, N-hydroxymethyl acrylamide (NMA) was introduced between the soybean protein adhesive and poplar veneer. The effects of unfolding degree of soybean protein structure on the properties of pretreated soybean protein were studied by Fourier-transform infrared spectroscopy (FT-IR), hydrogen nuclear magnetic resonance spectroscopy ( 1 H NMR) and thermal analysis (TGA, DTG), and the results showed that the synthesis of Soybean protein macromolecular initiator (SPI-Br) and soybean protein-glycidyl methacrylate graft copolymer (SPI-g-PGMA) was successful. In addition, the pretreatment of poplar veneer with N- hydroxymethyl acrylamide improved the penetration depth of the adhesive on the veneer. The treated plywood has excellent performance and has good application prospects in construction, furniture manufacturing and other fields.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2021
·
IF 4.311
Jingjing Li,Yijia Liang,Xiaodong Tang,Xiaojie Lei
Methane sulfonic acid (MSA) was used as anion to synthesize a series of ionic liquids and its desulfurization performance was evaluated by extraction. The basic physical properties and structural properties of the ionic liquids were evaluated, and it was proved that the ionic liquids could be used and separated well in liquid–liquid extraction desulfurization (EDS) system. The liquid–liquid extraction desulfurization system was enhanced by microchannel technology. The effects of microchannel diameter, extraction temperature, residence time and extraction stage on extraction efficiency were discussed. In the microchannel extraction system, this extraction equilibrium time can be reduced to 60 s from more than 10–15 min or longer in the conventional intermittent extraction techniques, which effectively reduces the synthesis and production cost. This finding may provide some reference for the further study of the micro-reaction technology in the deep removal of sulfur compounds from gasoline by ionic liquid, and further optimize the operating conditions.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2014
·
IF 2.871
Huan Wang,WenWen Wu,DanYi Wei,ZhiYong Guo,Sui Wang
Three-phase hollow fiber based liquid phase microextraction (HF-LPME) was developed for the preconcentration of kanamycin sulfate combined with electrochemiluminescence detection. The extractant was 1-octyl-methylmidazolium hexafluorophosphate ([OMIM]PF 6 ). A hollow fiber supported liquid membrane was used between phosphate buffer solution (PBS) containing analyte (kanamycin sulfate) as donor phase and aqueous solution (pH 10) as acceptor phase. The effects of various parameters on the extraction efficiency were studied, such as pH of ECL working solution, extraction temperature, pH of donor phase, extraction time and salt content of sample. Under the optimized conditions, the linear range was 0.002–0.1 μg mL −1 , and the limit of detection (LOD) was 0.00067 μg mL −1 . No expensive equipment is necessary to perform this assay which makes it a viable replacement.
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高影响因子
Sensor Letters
·
2014
·Vol. 12
·期 10
·1462-1468
·
IF 0.558
Liu Zhi-Min,Zheng Ying-Ying,Jing Yan-Feng,Li Jie,Zhan Hai-Jun,Shen Qi
A facile, one-step synthesis of ionic liquid-functionalized graphene (IL-GR) nanocomposite using graphene oxide (GO) and amine-terminated ionic liquid (NH2-IL) was first presented through an epoxide ring-opening reaction, then acetylcholinesterase (AChE) was immobilized onto
IL-GR nanocomposite film modified glassy carbon electrode to prepare a highly sensitive AChE biosensor. The morphologies and electrochemistry properties of the composite were investigated by using scanning electron microscopy, transmission electron microscopy and cyclic voltammetry, respectively.
The nanocomposite not only provided a biocompatible microenvironment to keep the bioactivity of AChE, but also exhibited a strong synergetic effect on improving the sensing properties of phoxim. The immobilized AChE showed favorable affinity to acetylthiocholine (ATCl) and could catalyze the
hydrolysis of ATCl with a Kapp
m
value of 0.143 mM. The proposed biosensor exhibited a detection limit of 6.0 × 10–11 M (S/N = 3) towards phoxim. Besides, the biosensor is easy to prepare, have good stability, and will have potential application
in organophosphate pesticides.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 41
·19824-19833
·
IF 3.925
Xiaoxia Liu,Yang Wu,Yangyang Wang,Huiying Wei,Jinxin Guo,Yanzhao Yang
Liquid–liquid extraction technology based on ionic liquids (ILs) is an efficient and environmentally friendly method to recover Au(III). This work aims to separate Au(III) from hydrochloric acid media using a novel IL [DBA-Pyr][NTf2], which is a pyrrolidinium-based IL functionalized with amide groups. Firstly, experiments have been carried out under optimal conditions, including the concentration, acidity and temperature. It turns out that low concentrations of hydrochloric acid help in Au(III) extraction, while the increase of chloride ion concentrations has an adverse effect. Then, through Job's method, extraction complexes with a molar ratio of [DBA-Pyr][NTf2]-to-Au(III) of 1 : 1 were determined. And, the anion exchange extraction mechanism was confirmed by FT-IR, UV-Vis, and 13C NMR spectroscopies and an electrostatic potential energy (ESP). Under the optimal extraction conditions, it has excellent selectivity to Au(III) compared to both base metal ions and platinum group metals (PGMs). Furthermore, Au(III) could also be recovered from the IL phase using an aqueous solution of thiourea in 95.6% with high selectivity. After 4 cycle experiments, an extraction efficiency of more than 90% is still maintained. The results show that [DBA-Pyr][NTf2] has potential application prospects in Au(III) recovery from hydrochloric acid media.
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危险品化学品经营许可证（带存储）