SEPARATION SCIENCE AND TECHNOLOGY
·
2025
·
IF 2.3
Qi’an Yu,Yan Li,Jinghua Yu,Jing Gao
In this study, astaxanthin was recovered from Antarctic krill waste via thermo-reversible biphasic system composed of phosphonium-based ionic liquids (ILs) and water. The phase behavior and physical properties of the mixtures were investigated. The astaxanthin extraction was compared with organic solvents and pure ILs, and the extraction mechanism was revealed through Quantum chemical computation. Moreover, the stability of the extract was evaluated. The extracted residue was further used as a biosorbent to remove methyl blue and Congo red from waste water. Results showed the [P4444]CF3COO-water system presented lower critical solution temperature (LCST)-type phase behavior, while the [P4448]CF3COO-water system presented an upper critical solution temperature (UCST)-type phase behavior. Astaxanthin has a tendency to migrate to the IL-rich phase due to the hydrogen bond between ILs and astaxanthin. The highest extraction yield of astaxanthin reached 35.78 μg/g by using the [P4444]CF3COO-water system at 308.15 K at a solid–liquid ratio of 1:40 g/mL and an extraction time of 75 min. In addition, the extracted residue with spongy and porous surface showed high removal efiiciency of Congo red (92.6%) and methylene blue (97.31%). The study provides an efficient and environmentally friendly method to selectively extract astaxanthin from natural bioresources.
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Huifeng Deng,Yanqun Yang,Jianbin Ju,Yu Jiang,Xiaowen Huang,Zhenyu Li,Rui Shi,Guihua Ruan,Yipeng Huang
In this study, 4-vinylphenylboronic acid, ionic liquid, and dipentaerythritolhexakis(3-mercaptopropionate) were used as functional monomers to prepare monolithic column in fused-silica capillaries by thermally induced sulfhydryl-alkenyl click polymerization. Based on the properties of 4-vinylphenylboronic acid and ionic liquid, the monolithic capillary column (VPBA-SH-IL) exhibited excellent permeability and chemical stability with the ability to efficiently enrich trace amounts of cytokinins from complex substrates via B←N coordination, π-π interactions, cation-π interactions, S-π interactions and hydrophobic interactions. Under the optimal adsorption conditions, the adsorption efficiency of VPBA-SH-IL for six cytokinins could reach more than 95 %, and the adsorption capacities ranged from 0.18 to 0.99 mg·m −1 . A reliable and sensitive method for the determination of six cytokinins in organs of tomato (root, stem, leaf and fruit) was established by using the monolithic capillary column as in-tube solid-phase microextraction coupled with UHPLC-MS/MS. The developed method showed a wide linear range (0.010–10.0 μg·L −1 ) and low limits of detection (1.6–3.3 ng·L −1 ). The recoveries of the six cytokinins in spiked samples ranged from 80.6 % to 108 % with the relative standard deviations of 2.4–8.7 % ( n = 5). The VPBA-SH-IL shows good potential for extraction and analysis of trace cytokinins in complex matrices such as plants, which is of great significance in exploring the mechanism of plant growth and development.
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产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Yijing Chen,Han Feng,RanRan Li,Chunhong Zhang,Yuhui Ao,Lei Shang
In this work, the synthesis of simple and convenient flame retardant curing agents for epoxy resin (EP) was investigated to solve the problems of existing flame retardant curing agents due to their complicated preparation process and poor mechanical properties. In this paper, a new type of ionic liquid curing agent (ZIM) was successfully synthesized by introducing a one-step reaction between n-octylphosphoric acid (OPA), which contains a flexible chain, and imidazole (IM) at room temperature. The results showed that the curing agent had a gel time of only 3.5 min at 120 °C, and could achieve UL94 V-0 rating with an ultimate oxygen index of 32 % or more at any additive amount of 15 phr or more. The peak exothermic rate and total exothermic rate are reduced by 55.45 % and 33.45 %, which can meet the requirements of fire safety standards in the industrial field. In addition, the incorporation of flexible chain segments and the absorption of energy dissipation by ionic bonding resulted in a 118.33 % increase in elongation at break and 127.44 % increase in impact strength of EP/ZIM-15, which greatly improved the mechanical properties. This work provides an efficient and simple method for preparing high performing EP curing agents.
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Fengli Chen,Xinglong Zhang,Xinqi Du,Lei Yang,Yuangang Zu,Fengjian Yang
A new approach for ionic liquid-based enzymatic hydrolysis in situ trans -resveratrol extraction (ILEHE) from tree peony seed oil extracted residues is presented, in which enzymatic hydrolysis is used in an ionic liquid aqueous medium to enhance the trans -resveratrol yield. Various factors of the ILEHE procedure, including the variety and concentration of enzyme, type and concentration of ionic liquid, liquid–solid ratio and pH of the solution system, and ILEHE temperature and time, were investigated by single-factor experiments, response surface methodology, and first-order kinetic models. A satisfactory yield of trans -resveratrol (5.48 ± 0.14 μmol/g) was obtained by the novel developed approach compared with other conventional techniques. Scanning electronic microscopy of the samples indicated that tree peony seed treated by mixed cellulase and pectinase (1/1, w/w) enzymes in an ionic liquid led to more efficient extraction by reducing mass transfer barrier. The proposed ILEHE method was validated by stability, repeatability, and recovery experiments and shows promising prospects in the extraction and hydrolysis aspects, for enhancing efficiency of target components in natural products.
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Yuchen Wu,Ming Chao,Chengyi Lu,Hanyu Xu,Kai Zeng,Decheng Li,Ruizhi Yang
Surface functionalization is one effective strategy for optimizing the stability of Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) with Li metal anodes and the compatibility between the components of an electrolyte for lithium battery. Herein, a bifunctional modification layer induced by the silane coupling agent (SCA) and ionic liquid (IL) are successfully introduced onto the surface of LATP particles (defined as [email protected] ) through chemical grafting and ion exchange strategies. Benefitting from the synergistic effect between the protection of modification layer and the effectively reduced interaction of PEO chain segments with Li + , the compatibility of LATP with the Li metal anode is improved, and the dispersion of LATP in PEO matrix is enhanced, a faster Li + transfer is thereby enabled. As a result, thus-prepared [email protected] composite polymer electrolyte (CPE) shows an excellent electrochemical property with high ionic conductivity (1.455 × 10 −3 S cm −1 at 60 °C), enhanced Li-ion transference number (0.40), wide electrochemical stability window (4.76 V vs. Li + /Li) and favorable Li metal compatibility (over 1200 h). Furthermore, separately assembled Li/ [email protected] CPE/LFP coin full cells and pouch cells verify the operational feasibility under extreme conditions. This work paves a new way to protect LATP and promote its practical application in all-solid-state lithium batteries.
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DOI
高影响因子
FOOD AND BIOPRODUCTS PROCESSING
·
2019
·
IF 3.324
Liling Wang,Yifeng Zhou,Yanbin Wang,Yuchuan Qin,Bentong Liu,Minge Bai
Dihydromyricetin (DMY) is the main flavonoid present in vine tea and is also known to possess various beneficial health effects. Extractions of DMY from vine tea were investigated by ultrasonic-assisted extraction (UAE) with β-Cyclodextrin (β-CD) and ionic liquid (IL), which were the two green extraction methods attracting more attentions in recent years. Single factor and response surface methodology (RSM) were used in order to optimize the extraction conditions for obtaining maximum amount of DMY in the two approaches. The results of HPLC analysis showed that the addition of β-CD or 1-hexyl-3-methylimidazolium bromide ([HMim] Br) to the water solution had excellent effects on the extraction of DMY. In β-CD-UAE, the optimum conditions were 3.6% β-CD, ultrasonic time 8 min, liquid–solid ratio of 33 (mL/g), and ultrasonic power 360 W. Molecular docking results indicated that the ‘host-guest’ effect between β-CD and the molecule of DMY in water solution, which utilized molecular recognition and interactions through non-covalent bonding and hydrogen bonding is the main driver of the binding. And for IL-UAE, the optimal conditions were 1.25 mol/L [HMim] Br, ultrasonic time 5.5 min, liquid–solid ratio of 45 (mL/g), and ultrasonic power 240 W. Under above suitable conditions, the extraction yield of DMY can reach to about 40%; moreover, β-CD-UAE and IL-UAE can be easily applied for experimental or industrial scale in food or functional food use.
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DOI
高影响因子
Materials Reports: Energy
·
2024
·
IF 0
Lingwang Liu,Jiangyan Xue,Yiwen Gao,Shiqi Zhang,Haiyang Zhang,Keyang Peng,Xin Zhang,Suwan Lu,Shixiao Weng,Haifeng Tu,Yang Liu,Zhicheng Wang,Fengrui Zhang,Daosong Fu,Jingjing Xu,Qun Luo,Xiaodong Wu
Solid polymer electrolytes (SPEs) have attracted much attention for their safety, ease of packaging, cost-effectiveness, excellent flexibility and stability. Poly-dioxolane (PDOL) is one of the most promising matrix materials of SPEs due to its remarkable compatibility with lithium metal anodes (LMAs) and suitability for in-situ polymerization. However, poor thermal stability, insufficient ionic conductivity and narrow electrochemical stability window (ESW) hinder its further application in lithium metal batteries (LMBs). To ameliorate these problems, we have successfully synthesized a polymerized-ionic-liquid (PIL) monomer named DIMTFSI by modifying DOL with imidazolium cation coupled with TFSI - anion, which simultaneously inherits the lipophilicity of DOL, high ionic conductivity of imidazole, and excellent stability of PILs. Then the tridentate crosslinker trimethylolpropane tris[3-(2-methyl-1-aziridine)propionate] (TTMAP) was introduced to regulate the excessive Li + -O coordination and prepare a flame-retardant SPE (DT-SPE) with prominent thermal stability, wide ESW, high ionic conductivity and abundant Li + transference numbers ( t Li + ). As a result, the LiFePO 4 |DT-SPE|Li cell exhibits a high initial discharge specific capacity of 149.60 mAh g -1 at 0.2 C and 30 °C with a capacity retention rate of 98.68% after 500 cycles. This work provides new insights into the structural design of PIL-based electrolytes for long-cycling LMBs with high safety and stability.
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DOI
TALANTA
·
2024
·
IF 5.6
Yanli Zhou,Hewen Yin,Junru Li,Kexian Shao,Hui Dong,Cuixia Ling,Xiaobing Wang,Maotian Xu
A nitrogen-doped carbon shell loaded with a gold and silver alloy (Au/Ag@NCS) was constructed for highly sensitive electrochemical detection of NO . The Au/Ag@NCS material was prepared by use of SiO 2 particles as a template to polymerize imidazolium-based ionic liquids loaded with gold and silver salts, and subsequent carbonization treatment and template removal. The hollow structure of the carbon material acted as a carrier for electrochemical sensing, offering high specific surface area , large pore capacity, robust electron conductivity, and excellent mechanical stability. The inclusion of gold in the composite enhanced its catalytic and sensing capabilities, while silver oxidation was employed as a reference signal for accurate detection. By utilization of the Au/Ag@NCS-modified electrode, a wide detection range from 0.5 nM to 1.05 μM with a low detection limit of 0.32 nM was achieved for NO detection. The electrochemical sensor also exhibited high selectivity and excellent stability. The fabricated sensor was further utilized to explore the release of NO from breast cancer cells, revealing that the electrochemical platform could be regarded as an important method to study the daily tests of NO in clinical application.
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DOI
高影响因子
Catalysis Science & Technology
·
2017
·Vol. 7
·期 18
·4173-4181
·
IF 5.773
Yong Wang,Xin Guan,Fangyan Chen,Shuaishuai Zhu,Yunsheng Ye,Haiyan Peng,Xingping Zhou,Xiaolin Xie,Yiuwing Mai
The first examples of bifunctional hyperbranched polymers (HBP) with high density ionic liquid (IL) moieties in the main chain and controllable amount of pyrene groups at the chain ends (Py-HBPIL) have been synthesized via a facile three-step procedure, which were then immobilized onto reduced graphene oxide (rGO) via π–π stacking interactions. Py-HBPIL(Br) bearing pyrene groups at 10% of the chain ends allowed the highest immobilization loading of 73% in weight. The resultant Py-HBPIL(Br)@rGO hybrid material displayed much better catalytic activity than ever reported for immobilized IL catalysts for coupling reaction between CO2 and propylene oxide (PO), and it could be reused up to 6 times by simple filtration process without significant decline in activity. Furthermore, the combination of bifunctional HBP and π–π stacking immobilization may provide a general and versatile platform to design highly active, selective and recyclable catalysts for various chemical transformations.
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Lijuan Zhao,Faqiong Zhao,Baizhao Zeng
In this paper, a novel sensitive and selective molecularly imprinted electrochemical sensor was presented for the determination of carbaryl (1-naphthyl methylcarbamate). The sensor was constructed by coating a glassy carbon electrode (GCE) with chitosan-AuPt alloy nanoparticles (CS-AuPtNPs), graphene-ionic liquid-nano Au (GR-IL-Au), and followed by electrodepositing carbaryl imprinted poly(p-aminothiophenol) (p-ATP) film. The CS-AuPtNPs and GR-IL-Au composites played the roles to immobilize monomer p-ATP and to improve the electrochemical response; [Fe(CN)6] 3- /[Fe(CN)6] 4- acted as electrochemical probe. The mechanism of the fabrication process and several important parameters controlling the preparation and electrochemical response of sensor were discussed and optimized. Under the optimal conditions, a linear range from 0.030 μM to 6.0 μM for the detection of carbaryl was obtained. The sensitivity was 4.0 μA/μM mm2 and the detection limit was 8.0 nM (S/N=3). The resulting sensor displayed good selectivity and stability towards carbaryl. It was successfully applied to the determination of carbaryl in practical samples and the recovery was 96 - 105%.
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Weichen Zhu,Yu Huang,Bo Jiang,Rengui Xiao
The strong self-discharge reaction is one of the key factors limiting the practical use of dual-ion batteries, which leads to low coulombic efficiency and discharge capacity loss. It is of great significance to effectively reduce the self-discharge effect through redox reactions between organic electrodes and electrolytes. Herein, a dual-ion battery study that uses 1,4,5,8-naphthalenetetracarboxylic dianhydride as the anode and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide as the electrolyte is conducted. Due to the introduction of organic materials, the storage mechanism of cations on the anode is changed, which weakens the self-discharge effect. The battery shows a low self-discharge rate of 6.12% h −1 and a high discharge capacity of 114 mAh g −1 . The voltage declines by only 0.14 V after resting for 15 h due to the strong redox reaction between Pyr 14 + cations and the C O groups of NTCDA. Meanwhile, a double-layer filter paper system with small porosity is used to improve the cycle performance of the battery.
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高影响因子
PROCESS BIOCHEMISTRY
·
2021
·
IF 3.757
Lingqi Wang,Changyong Cai,Jiajia Liu,Zhijian Tan
To explore convenient and efficient techniques for the extraction and separation of the active ingredients in medicinal plants is still ongoing. As a new class of molten salt, ionic liquids (ILs) are widely used in the extraction of bioactive compounds from plant resources. In this work, the IL-based biphasic system was developed for the extraction and separation of the homologues of baicalin and baicalein from Scutellaria baicalensis Georgi. The IL-water biphasic system is superior to the other organic solvents-water systems for the extraction and separation of baicalin and baicalein. The phase volume ratio of the IL-water biphasic system was studied, and the other influencing parameters of solid–liquid ratio, extraction temperature, extraction time, and ultrasonic time were optimized through the single factor experiments. The results revealed that the extraction yields were 43.3 mg/g and 14.3 mg/g for baicalin (aqueous phase) and baicalein (IL phase), respectively; and the distribution coefficients were 23.8 and 13.7 for baicalin and baicalein, respectively under the optimized conditions. Finally, the IL can be easily recycled and reused by means of its temperature-responsive characteristic. This study provides a green and efficient method for the selective separation of the homologues in natural plant resources.
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高影响因子
危险品化学品经营许可证（带存储）