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
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
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Ya-Peng Du,Meng Li,Xiao-Ping Zheng,Yu Chai,Yan-Zhen Zheng
Effective pre-treatment is vital for efficiently separating and utilizing the three primary components of lignocellulose. In this investigation, agricultural by-product bagasse underwent pre-treatment using a system comprising a metal-based ionic liquid ([BMIM][AlCl 4 ]) and the biomass-derived organic acid lactic acid (LA). This combination exhibited a remarkable synergistic effect in removing lignin (72.58 wt%) while preserving cellulose (70.1 wt%) in the solid residues. The mechanism of the synergistic effect of [BMIM][AlCl 4 ] and LA was revealed by density functional theory (DFT) calculations, which elucidated the formation of weak-strength, closed-shell, and electrostatically dominant hydrogen bonds between [BMIM][AlCl 4 ]/LA and lignin. [BMIM][AlCl 4 ] and LA interacted with lignin simultaneously, significantly contributing to lignin dissolution. The removal of lignin and cellulose retention without disrupting the cellulose structure was confirmed through characterization using FTIR, SEM, and XRD techniques. Besides, the pre-treatment effectively broke down the barrier to degradation, enhancing the conversion yield of cellulose into the important platform molecule levulinic acid. Additionally, the regenerated lignin, with small molecular weight and nanometer particle size, demonstrated high antioxidant and antibacterial properties. Overall, this study provides insights into the development of ionic liquid-organic acid pre-treatment strategies for efficiently converting agricultural waste into biofuels, biochemicals, and bio-based materials.
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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
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Gui-Sheng Zhou,Yi-Chu Yuan,You Yin,Yu-Ping Tang,Ren-Jie Xu,Yan Liu,Pei-Dong Chen,Lian Yin,Jin-Ao Duan
A sensitive, rapid, precise and specific analytical method of hydrophilic interaction ultra-performance liquid chromatography coupled with triple-quadrupole linear ion-trap tandem mass spectrometry (HILIC-UHPLC–QTRAP®/MS 2 ) combined with a high-efficiency and easy sample preparation technology of ultrasound-assisted ionic liquid dispersive liquid–liquid microextraction (UA-IL-DLLME) was developed to investigate neurotransmitters (NTs) in mild cognitive impairment, mild dementia and moderate dementia patients’ urine samples. Firstly, the UA-IL-DLLME parameters were optimized using Plackett–Burman screening and rotatable central composite design, and the main optimal conditions were obtained: ultrasound power of 307 W, ultrasound time of 4.3 min and agitation time of 4.8 min. Secondly, HILIC-UHPLC–QTRAP®/MS 2 method was developed to simultaneously determine 15 underivatized NTs in urine samples. The analysis results of clinical samples showed that some NTs such as γ-aminobutyric acid (GABA), acetylcholine (Ach) and glutamic acid (Glu) presented significant differences in different dementia stages. Finally, multivariate analysis based on the combination of principal component analysis and supervised counter propagation artificial neural network was developed for comprehensive analysis of the obtained clinical data sets. As a result, GABA and Glu were simultaneously presented meaningful contribution for classification of samples, and might be considered as potential differential compounds to the urine samples from cluster patients with different dementia stages. In summary, the presented strategy of preparation, analysis and statistics might be used to investigate NTs in different clinical biological fluids.
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高影响因子
Chemical Engineering Journal Advances
·
2021
·
IF 0
Fengjie Deng,Jie Liang,Guang Yang,Xin Hu,Qiang Huang,Jibo Dou,Yuanqing Wen,Meiying Liu,Xiaoyong Zhang,Yen Wei
In this paper, we report the fabrication of ionic liquid (IL)-modified molybdenum disulfide (MoS 2 ) composites via a simple but effective method, that relied on Gamma-ray-initiated polymerization of polydopamine (PDA) modified MoS 2 nanosheets using IL as a monomer. The adsorptive removal of Congo red (CR) from aqueous medium by MoS 2 @PDA@IL composites was investigated. Batch experiments were carried out thoroughly to explore the effects of various experimental factors, such as contact time, containment initial concentration, and the function of pH and system temperature on the adsorption of MoS 2 @PDA@IL composites towards CR. Based on the experimental data, the adsorption kinetics, isotherms (Langmuir and Freundlich) and thermodynamics were also studied. We demonstrated that the adsorption of CR on MoS2@PDA@IL is a spontaneous and endothermic process. The amount of adsorbed CR of the MoS 2 @PDA@IL composites (Q e, max = 112.16 mg/g) is 2.77 times that of pristine MoS 2 (Q e, max = 40.54 mg/g). The above results demonstrated that PIL functionalized MoS 2 nanosheets are promising for adsorptive removal of environmental pollutants. More importantly, owing to the universal adhesion capability of polydopamine, the method might also be extended for the fabrication of other polymeric composites with different functions for various applications. Therefore, this work will attract interest from scientists in the materials, chemistry and environmental fields.
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FOOD AND BIOPRODUCTS PROCESSING
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2019
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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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高影响因子
JOURNAL OF POWER SOURCES
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2024
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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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高影响因子
TALANTA
·
2024
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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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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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Catalysis Science & Technology
·
2017
·Vol. 7
·期 18
·4173-4181
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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
POLYMER
·
2023
·
IF 4.6
Ying Wei,Wei Chen,Xinyi Ge,Jiayi Liang,Zheng Xing,Qingguo Zhang,Zhong-Xia Wang
Ionogel electrolytes (IGEs) with chemical and thermal stability properties have attracted considerable attention for all-solid-state energy storage devices, particularly for high-performance supercapacitors (SCs). However, achieving high conductivity, flexibility, and toughness, as well as deformation and impact resistance in special cases, is challenging with the typical polymer based on ionic liquids (ILs). Here, an effective gelation strategy is proposed for the preparation of free-standing LiTFSI/[EMIM][TFSI]/PVDF-HFP ionogels (IGs) by double-additive induced physical cross-linking. The mechanical and electrochemical properties of the IGs can be synergistically optimized by the cross-linking and entanglement of LiTFSI and [EMIM][TFSI] with the PVDF-HFP network. The target IGs simultaneously exhibit excellent deformation capacity (over 50 %), high ionic conductivity (10.3 × 10 −3 S cm −1 at 25 °C), hardness (H: 728.6 kPa), and Young's modulus (E: 11.4 MPa), which can exhibit the specific capacitance of 274. 55 F g −1 , energy density of 38.13 Wh kg −1 and maximum power density of 2499.93 W kg −1 in the fabricated symmetric supercapacitor . The results will motivate us to further explore their applications for flexible electronic devices, wearable electronic skin, and flexible energy storage.
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高影响因子
危险品化学品经营许可证（带存储）