FUEL
·
2023
·
IF 7.4
Qing Zhao,Mengjin Zhou,Haiyang Cheng,Jiuxu Ruan,Yangyang Wang,Zhaoyou Zhu,Peizhe Cui,Yinglong Wang,Jingwei Yang
Efficient recovery of isopropyl acetate and isopropanol from wastewater during esterification is important. An efficient separation process using ionic liquid mixed solvent extractive distillation (MSED) to separate azeotropic mixtures was proposed. The selectivity of 169 ionic liquids was calculated based on the COSMO–segment activity coefficient model for prescreening ionic liquids. The influence of the structure of the ionic liquids on the separation performance was further explored through molecular dynamics to determine 1-ethyl-3-methylimidazole acetate ([EMIM][AC]) as the best solvent. The vapor–liquid equilibrium of the system under the influence of [EMIM][AC] was measured to verify the model used for the calculation. A multi-objective genetic algorithm was used for optimizing the process parameters with the total annual cost (TAC) and gas emission as objective functions. An energy-saving heat-pump-assisted heat-integrated extractive distillation (HPHIED) process was proposed to realize heat recovery in MSED. The results showed that the TAC and gas emissions of MSED were 26.83% and 25.32%, respectively, lower than those of the single-organic solvent extractive distillation process. The TAC and gas emissions of HPHIED process were 11.02% and 35.83%, respectively, lower than those of MSED.
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Biomass Conversion and Biorefinery
·
2019
·Vol. 10
·期 4
·795-802
·
IF 2.326
Li Yan,Wu Weibo,Li Hu,Zhao Wenfeng,Yang Song
Furfuryl alcohol (FOL) is one of the versatile molecules in the chemical industry, and can be obtained from the biomass-derived furfural (FAL) via selective hydrogenation. In this study, a mild and rapid protocol was developed for the efficient reduction of FAL to FOL in the presence of an eco-friendly ionic liquid tetrabutylammonium fluoride ([TBA]F) using 1,1,3,3-tetramethyldisiloxane (TMDS) as the hydrogen source. After reacting at room temperature for 5 min, a high FOL yield of 97% with a remarkable TOF value of 310 h −1 could be achieved. The activation of TMDS with fluoride was found to play a key role in the acceleration of the hydrogenation process, and ATR-FTIR and HR-MS were used to verify the possible reaction pathway.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 11
·1-11
·
IF 5.7
Li Dan,Gao Yanmei,Mu Mengyao,Zhu Shiping,Zhang Ning,Lu Minghua
Ionic liquid (IL)-modified UiO-66-NH 2 composite was prepared and used as sorbent of dispersed solid-phase extraction (dSPE) for extracting trace benzoylurea insecticides (BUs) from complex environmental matrices. The IL in framework endowed the prepared material had electropositive characteristics, which can produce interaction with electron rich guest molecules, such as BUs. The high thermal and chemical stability of UiO-66-NH 2 /IL enabled it to be reused for 16 times without significant reduction in adsorption performance. Due to the multiple forces including π-π, hydrogen bonding, and fluorine-fluorine interaction, UiO-66-NH 2 /IL showed good adsorption performance, short adsorption time (20 s) and rapid desorption ability (60 s) for BUs. Under the optimal conditions, the method exhibited wide linear range (0.02–500 ng mL -1 ) with correlation coefficient ( R 2 ) not worse than 0.9928, high enrichment factor (252–300), and low detection limit (0.005–0.4 ng mL -1 ). The dispersed solid phase extraction coupling with high-performance liquid chromatography-diode array detector (dSPE-HPLC-DAD) was successfully used to detection of BUs in real environmental samples and satisfactory recoveries were obtained (80.5%±2.4–118%±3.2). The results indicated that UiO-66-NH 2 /IL composite can be a potential sorbent for the preconcentration of trace insecticides in environmental samples. Graphical abstract
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PubMed
高影响因子
Catalysts
·
2021
·Vol. 11
·期 2
·233
·
IF 4.146
Chao Bu,Yanyan Gong,Minchen Du,Cheng Chen,Somboon Chaemchuen,Jia Hu,Yongxing Zhang,Heriberto Díaz Velázquez,Ye Yuan,Francis Verpoort
With the aim of profitable conversion of carbon dioxide (CO2) in an efficient, economical, and sustainable manner, we developed a CuBr/ionic liquid (1-butyl-3-methylimidazolium acetate) catalytic system that could efficiently catalyze the three-component reactions of propargylic alcohols, 2-aminoethanols, and CO2to produce 2-oxazolidinones and α-hydroxy ketones. Remarkably, this catalytic system employed lower metal loading (0.0125–0.5 mol%) but exhibited the highest turnover number (2960) ever reported, demonstrating its excellent activity and sustainability. Moreover, our catalytic system could efficiently work under 1 atm of CO2pressure and recycle among the metal-catalyzed systems.Keywords:carbon dioxide chemistry;copper catalysis;synthetic methods;multicomponent reaction;cyclization
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JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Zhenguo Zhang,Jiahui Ren,Jingmei Xu,Lingxin Meng,Pengyun Zhao,Hao Wang,Zhe Wang
In this work, the MIL-100(Fe) was selected as blank-sample. Using one-pot method, phosphotungstic acids were encapsulated in the blank-sample to prepare HPW@MIL-100(Fe). Then, the ionic liquid ([EMIM][N(Tf) 2 ]) was chosen to modify the HPW@MIL-100(Fe). And the phosphotungstic acid-ionic-liquid (HPW-ILs) modified MIL-100(Fe) (HPW-ILs@MIL-100(Fe)) was obtained. The final product was introduced into polymer matrixes (C-SPAEKS) to prepare hybrid membranes. The structures and morphologies of MOFs and membranes were characterized by field emission scanning electron microscope (FTSEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). This series of membranes exhibited increasing proton conductivities from 0.043 S cm −1 of C-SPAEKS to 0.138 S cm −1 of HPW-ILs@MOF-4 at 100 °C and 100% relative humidity. Furthermore, these hybrid membranes have enhanced mechanical properties and dimensional stabilities. Obviously, the HPW-ILs@MIL-100(Fe) had a beneficial function on improving the performance of PEMs and showed great potential in PEMs applications.
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高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Zhongliang Hu,Xiaojing Zhang,Shimou Chen
Development of solid polymer electrolytes (SPEs) with superior performance is crucial for high-energy density lithium metal batteries (LMBs). Herein, a graphene oxide (GO) and ionic liquid (IL) assisted anion-immobilized polymer electrolyte (PGI) is developed, which can effectively prevent the formation of Li dendrite of LMBs. Various characterizations show that the synergetic interactions among the poly (ethylene oxide) (PEO), GO and IL in PGI, greatly reduce the crystallinity of PEO. All of the amorphous PEO, GO, and IL can effectively tether anions and enhance the ionization of lithium salts , which lead to a uniform assignment of charges and lithium ions in the electrolyte, as well as increase the transfer number of lithium ions. The PGI is utilized in all-solid-state batteries with a negligible polarization. The galvanostatic cycling tests (LiFePO 4 /Li cells using PGI electrolytes) at 60 °C show the initial capacities of 156.2 and 120 mAh g −1 at 0.1C and 0.5C, respectively. Moreover, the electrochemical tests also indicate that the LMBs using PGI electrolytes possess superior cycle stability at room temperature . The study provides a competitive solution for developing high-performance LMBs which can work well at both high temperature and room temperature.
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JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Minchen Du,Yanyan Gong,Chao Bu,Jia Hu,Yongxing Zhang,Cheng Chen,Somboon Chaemchuen,Ye Yuan,Francis Verpoort
Oxazolidinones and α-hydroxyl ketones are two series of fine chemicals that have been generally utilized in biological, pharmaceutical, and synthetic chemistry. Herein, a AgNO 3 /ionic liquid (IL) catalytic system was developed for the simultaneous synthesis of these compounds through the atom-economical three-component reactions of propargyl alcohols, 2-aminoethanols, and CO 2 . Notably, this system behaved excellent catalytic activity with the lowermost metal loading of 0.25 mol%. Meanwhile, it is the first reported metal-catalyzed system that could efficiently work under atmospheric CO 2 pressure and be recycled at least five times. Evaluation of the green metrics proved the AgNO 3 /IL-catalyzed processes to be relatively more sustainable and greener than the other Ag-catalyzed examples. Further mechanistic investigations revealed the derivative active species of N-heterocyclic carbene (NHC) silver complexes and CO 2 adducts generated during the process. Subsequently, their reactivity in this reaction was assessed for the first time, which was finally identified as beneficial for the catalytic activity.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 28
·期 13
·16470-16479
·
IF 4.223
Wang Lifang,Chen Jingfan,Li Xian,Chen Letian,Zhang Kaige,Wang Xuefeng,Zhu Guifen
A novel eco-friendly molecularly imprinted polymer (MIP) was proposed as solid-phase extraction (SPE) adsorbent to selective adsorption tylosin (TYL) in animal muscle samples. The MIP was synthesized in aqueous by using 1,4-butanediyl-3,3-bis-1-vinyl imidazolium chloride and 2-acrylamide-2-methylpropanesulfonic acid as bifunctional monomer. The obtained MIP had excellent selectivity towards TYL in water, and the maximum binding capacity can reach 123.45 mg g −1 . Combined with high-performance liquid chromatography, the presented MIP can be used as SPE sorbent to recognize and detect TYL in the range of 0.008 to 0.6 mg L −1 ( R 2 = 0.9995). The limit of detection and limit of quantification were 0.003 mg L −1 and 0.008 mg L −1 , and the intraday and interday precision were 1.05% and 3.36%, respectively. Under the optimal condition, the established MIP-SPE-HPLC method was successfully applied to separate and determine trace TYL in chicken, pork, and beef samples with satisfactory recoveries ranged from 94.0 to 106.3%, and the MIP-SPE cartridge can be cycled at least 20 times. This study implies a promising green MIP-SPE-HPLC method for highly selective adsorption and analysis trace TYL in complex matrices.
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PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2021
·
IF 7.267
Chao Lin,Weipei Li,Yurong Yan,Hanhan Ke,Zhengyu Liu,Lingli Deng,Zhiming Qiu
A novel form-stable phase change material (FSPCM) based on ionic liquid/aluminum nitride/copolyamide composite were fabricated from electrospinning approach. The ionic liquid 1-hexadecyl-3-methylimidazolium bromide (IL) was chosen as phase change materials while nano aluminum nitride (AlN) and copolyamide 6/12 (CoPA) were chesen as additive and supporting matrix, respectively. The surface morphology and heat storage property had been systematically investigated by Scanning Electronic Microscopy (SEM) and Differential Scanning Calorimetry (DSC), respectively. Results showed that the diameter of the phase change fibers are 0.92–1.07 μm and was influenced by the IL and AlN content. With 57 wt% of IL and 5 wt% of AlN, the composite fiber achieved a fusion enthalpy of 86.4 J/g and the thermal conductivity was increased by 165.2% compared to that of IL/CoPA. Thermogravimetric Analysis (TGA) and thermal cycle test also indicated a good thermal stability and reusability of the composite fiber. Furthermore, Fourier Transform Infrared Spectroscopy (FTIR) and X-Ray Diffraction (XRD) analyses indicated that new hydrogen bonds between IL and CoPA were formed in the composite and showed a significant effect on the thermal performance of the composite fibers. The electrospun composite fiber based on ionic liquids can be applied as form-stable phase change material in thermal energy storage and temperature regulation.
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高影响因子
IONICS
·
2020
·Vol. 26
·期 9
·4609-4619
·
IF 2.394
Cui Fengjuan,Deng Qingfang,Zhao Huaping,Jiang Yan,Li Jinlong
Recently, heteroatom-doped carbon has been widely used in various fields because of their inexpensive and abundant resources, especially in oxygen reduction reaction. Here, the 1-butyl-3-methlyimidazolium hexafluorophosphate (BmimPF 6 ) is explored as the precursor to offer phosphorus and fluorine, and melamine as a supporter to provide nitrogen. The N, P, F-tridoped mesoporous carbons are obtained by pyrolyzing the homogeneous mixture of melamine and BmimPF 6 , without any post-processing. This composition of the carbon can be used as a potential metal-free electrocatalyst for oxygen reduction reaction (ORR). Notably, the optimized N, P, and F tri-doped mesoporous carbon obtained at 900 °C, exhibits good electrocatalytic performance for ORR, with high electron-transfer number, great methanol crossover tolerance, and outstanding durability. This work may provide a new case to synthesis heteroatom-tridoped carbon for energy conversion and storage.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Shuai Ji,Yujie Wang,Xian Shao,Cuicui Zhu,Yan Lin,Shikai Gao,Daoquan Tang
Triterpenoid saponins in licorice are important lead compounds for nutraceutical and pharmaceutical applications. This study developed a novel method for extraction and purification of triterpenoid saponins from licorice by ionic liquid based ultrasonic-assisted extraction combined with in situ alkaline aqueous biphasic systems (IL-UAE-AABS). IL-UAE was firstly used to efficiently extract triterpenoid saponins from licorice, which were further purified using in situ IL-AABS formed by adding NaOH into the extraction solution. We screened out the best-performing IL, namely 1-butyl-3-methylimidazolium tetrafluoroborate ([C 4 MIM]BF 4 ), from various ILs able to form AABS with NaOH, and established the optimal conditions (extraction time, [C 4 MIM]BF 4 concentration and solvent to solid ratio for IL-UAE, and NaOH concentration and temperature for IL-AABS). The established method could achieve high extraction efficiency (26.0 mg/g for glycyrrhizin) and total purify (more than 81.5%) for triterpenoid saponins, which was far superior to conventional IL-ABS. In addition, [C 4 MIM]BF 4 could be easily recovered and reused for the IL-UAE-AABS process for at least three times without apparent worse performance. This is the first report on extraction and purification of natural products by IL-UAE-AABS, which was shown to be able to efficiently and selectively obtain triterpenoid saponins from herbal medicines with good prospects.
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 10
·e5816
·
IF 3.14
Shuo Zhao,Zhaolin Dou,Yuepeng Liu,Zhipeng Lv,Yingzhi Cheng,Yanyun Wang,Man Jiang,Shuping Zhuo
In this study, BiOI materials with controllable structure are designed by using ionic liquid as I source and template to create the surface oxygen defects, thus promoting the photogenerated carrier migration and enhancing the photocatalytic activity. The texture of BiOI is controlled by adjusting the pH values of reaction mixture and the corresponding formation mechanism is also explored based on the self-assembly behavior of ionic liquid. It is found that the sample BiOI-7 possesses the ultrathin nanosheets (2 ~ 4 nm) and abundant surface oxygen defects which are beneficial for accelerating carrier transfer and facilitating photocatalytic degradation. The photocatalytic activity of as-prepared BiOI is studied by using Rhodamine B (RhB), methyl orange (MO) and Bisphenol A (BPA) as target pollutants, respectively. Besides, water splitting reactions were also used to further check the photocatalytic activity. BiOI samples exhibit the enhanced photocatalytic activity than bulk BiOI and g-C 3 N 4 obtained by calcination of melamine. Especially, 92% of bisphenol A (BPA) can be degraded under light irradiation within 1 hr by using only 5 mg of BiOI-7 nanosheets, which is superior than most counterparts reported so far. This rapidly synthetic route can be applied in fabrication of other novel materials with diverse morphology and porous structure.
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危险品化学品经营许可证（带存储）