ACS Sustainable Chemistry & Engineering
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2021
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IF 8.198
Wenjie Xiong,Zhuoheng Tu,Zengyu Yin,Xiaomin Zhang,Xingbang Hu,Youting Wu
Sodium batteries are attractive alternatives to the rapidly emerging large-scale intermittent renewable energy storage devices due to their low production cost and abundant sodium resources. The electrochemical performances of sodium batteries are highly dependent on the compatibility and interface resistances between electrode materials and electrolytes. Herein, we develop a simple method to modify a glass fiber (GF) separator by interfacial ionization and in situ introduction of a sodium source into the separator for a sodium metal battery. Polyionic liquid/ionic liquid gels were synthesized to incorporate into modified GF separators to prepare supported ionic liquid gel membranes (SILGMs) as dual separators and electrolytes for sodium batteries. The sodium-ion transference number of ionogel electrolytes incorporated on the support with and without modification was measured. The electrochemical performance characteristics of the battery with and without GF modification were evaluated by cyclic voltammetry, galvanostatic charge–discharge tests, and cycling stability as well as the galvanostatic intermittent titration technique (GITT). It was found that the specific capacity of the sodium metal battery increased by more than 20% after modification at a relatively high current density. Surprisingly, the specific discharge capacity of the assembled sodium metal battery can reach 112 mAh·g–1 at 0.1 C, fairly close to the theoretical capacity of cathode materials. The specific capacity retention of the battery with the modified GF separator was up to 99% after 100 cycles at 1.0 C. This work presents a novel method for separator modification to alter the interface compatibility between electrode materials and electrolytes for sodium metal batteries and provides a new insight to improve battery performance.
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EUROPEAN POLYMER JOURNAL
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2021
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IF 4.598
Zhaoquan Zheng,Bingyu Wang,Jing Chen,Yan Wang,Ziyue Miao,Cenyao Shang,Qiang Zhang
Glycopolymer has been developed in bactericidal applications, but the traditional synthesis, such as click chemistry, needs poly-step reactions and complicated processes. Herein, incorporating the glyco-units into the polymers by quaternization has been exploited to give a facile strategy by Copper-mediated reversible deactivation radical polymerization (Cu(0)-RDRP) to prepare quaternized poly(ionic liquid)s (PILs) with pendant saccharide. The obtained PILs have the suitable property of killing typical Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus . Simultaneously, they perform the lower hemolytic rate of blood cells, higher selectivity index against bacteria, and higher affinity with Concanavalin A (ConA) than those quaternized by bromohydrin at the same quaternization degree. This result demonstrated that the introduced saccharide units, such as glucose and mannose, could maintain the electrostatic interaction to kill bacteria, perform lectin recognition behavior and interaction with ConA, and relatively harmlessness against red blood cells. Moreover, the sugar-containing PILs became insoluble and still antibacterial after anion exchange reaction. These new findings illuminated that such quaternized antibacterial agents with saccharide units that are easy-to-prepare, low cytotoxic could pave the way for further water disinfectant and pathogen control application.
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JOURNAL OF MEMBRANE SCIENCE
·
2021
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IF 8.742
Kun Yang,Yujie Ban,Weishen Yang
Olefin/paraffin separation is one of the most important chemical process in petrochemical industry. Relative to currently used cryogenic distillation with high energy penalty, membrane-based separation has the potential to significantly reduce energy consumption. MOF membranes have emerged as a promising candidate for gas separation owing to its uniform porous structures and diversified chemical components. However, the scarcity of reliable synthesis methods limits the application of MOF membranes for olefin/paraffin separation. Here, we propose the layered MOF membranes modified with ionic liquid/AgBF 4 composite for olefin/paraffin separation, which exhibit impressive separation performances for mixed gases (C 3 H 6 permeance: 129.8 ± 40.4 GPU; C 3 H 6 /C 3 H 8 separation factor: 28.8 ± 3.8; C 2 H 4 permeance: 45.6 ± 23.7 GPU; C 2 H 4 /C 2 H 6 separation factor: 12.0 ± 2.2). This work, avoiding a complicated de novo design of microstructure of membrane, demonstrates a facile but effective strategy to convert an “inert” membrane to olefin-selective one.
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Catalysts
·
2021
·Vol. 11
·期 11
·1274
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IF 4.146
Ken-Lin Chang,Chun-Hung Liu,Paripok Phitsuwan,Khanok Ratanakhanokchai,Yung-Chang Lin,Cheng-Di Dong,Ming-Hsun Lin,Gordon C. C. Yang
Fungal delignification can be a feasible process to pretreat biomass for bioethanol production if its performance is improved in terms of efficiency through a few modifications. The aim of this study was to enhance the biodelignification pretreatment of rice straw using laccase in the presence of ionic liquid (1-Allyl-3-methylimidazolium chloride, [AMIM]Cl) or surfactant (TritonX-100). Addition of 750 mg/L [AMIM]Cl and 500 mg/L TritonX-100 increases the lignin removal to 18.49% and 31.79%, which is higher than that of laccase only (11.97%). The enzymatic saccharification process was carried out based on different strategies. The highest cellulose conversion, 40.96%, 38.24%, and 37.91%, was obtained after 72 h of enzymatic saccharification when the substrate was washed with distilled water after pretreatment of rice straw with laccase + TritonX-100, laccase + [AMIM]Cl, and laccase only, respectively. In addition, the morphology and structure changes of pretreated and untreated rice straw were studied. Both surface area and cellulose crystallinity are substantially altered after laccase + [AMIM]Cl and laccase + TritonX-100 pretreatment. Enhanced saccharification efficiency of rice straw was achieved by laccase pretreatment with ionic liquid or surfactant in a single system.Keywords:laccase;ionic liquid;surfactant;pretreatment;biomass;delignification
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JOURNAL OF MEMBRANE SCIENCE
·
2021
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IF 8.742
Ju Bai,Wei Lai,Lili Gong,Luqi Xiao,Guosheng Wang,Linglong Shan,Shuangjiang Luo
In order to enhance the permeance of the acid resistance membrane, an ionic liquid (IL) regulating strategy was proposed to rearrange the interfacial polymerization process. Herein, we revisited polyethylenimine (PEI) and cyanuric chloride (CC) as the pristine acid-resistant membrane. 1-aminopropyl-3-methylimidazolium chloride ([AEMIm][Cl]) and 1-aminopropyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide ([AEMIm][Tf 2 N]) ILs were used to regulate the interfacial polymerization process. Molecular dynamic (MD) simulation was used to reveal IL and PEI diffusion behavior in aqueous solution, membrane pore size distribution , and porosity. The effects of ILs on membrane surface morphology , surface zeta potential , chemical composition, and separation property were analyzed. The IL regulating strategy endow the membrane with uniform smaller pore and higher porosity, thus improved membrane permeance and selectivity simultaneously. For the [AEMIm][Cl] IL, the corresponding AEMIC-PEI-CC membrane showed high permeance of 79.1 L m −2 h −1 bar −1 , which is 1.36 times the pristine PEI-CC membrane, combined with high Y 3+ rejection of 97.5%, low H + rejection of 1.35%. In addition, this membrane showed good acid stability in 30 days long-term test.
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CARBOHYDRATE POLYMERS
·
2019
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IF 6.044
Xueqin Zhang,Naiyu Xiao,Mingjie Chen,Yi Wei,Chuanfu Liu
An alternative transesterification with vinyl laurate (VL) was applied for chemical modification of hemicelluloses (HC) to prepare functional packaging films. Successful transesterification was confirmed by FT-IR and NMR. Semitransparent laurated HC (LHs) films were prepared by solvent casting method. SEM indicated the ordered honeycomb-patterned surface and the dense cross section of LHs films. The LHs films exhibited excellent hydrophobicity with water contact angle about 120° and the enhanced mechanical properties with tensile strength and elongation at break as 33.94 ± 3.09 MPa and 22.41 ± 2.87%, respectively. The water vapor permeability (WVP) and oxygen permeability (OP) values of LHs films ranged from 1.59 ± 0.07 to 2.23 ± 0.11 (10 −10 ·g/m·s·Pa) and 1.21 ± 0.04 to 4.24 ± 0.30 (cm 3 · μ m/m 2 ·d·kPa), respectively. Moreover, the films had acceptable antioxidant activity. In terms of these properties, the shelf life of green chilies could be largely extended to 15 days after packing with LHs films.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2019
·Vol. 20
·期 24
·6198
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IF 4.183
Fang Wang,Chong Xie,Liying Qian,Beihai He,Junrong Li
Electro-actuated polymer (EAP) can change its shape or volume under the action of an external electric field and shows similar behavioral characteristics with those of biological muscles, and so it has good application prospects in aerospace, bionic robots, and other fields. The properties of cellulose-based electroactive materials are similar to ionic EAP materials, although they have higher Young’s modulus and lower energy consumption. However, cellulose-based electroactive materials have a more obvious deficiency—their actuation performance is often more significantly affected by ambient humidity due to the hygroscopicity caused by the strong hydrophilic structure of cellulose itself. Compared with cellulose, chitosan has good film-forming and water retention properties, and its compatibility with cellulose is very excellent. In this study, a chitosan/cellulose composite film doped with ionic liquid, 1-ethyl-3-methylimidazolium acetate ([EMIM]Ac), was prepared by co-dissolution and regeneration process using [EMIM]Ac as the solvent. After that, a conductive polymer, poly(3,4-ethylenedioxythiophene)/poly (styrene sulfonate) (PEDOT: PSS), was deposited on the surface of the resulted composite, and then a kind of cellulose-based electroactive composites were obtained. The results showed that the end bending deformation amplitude of the resulted material was increased by 2.3 times higher than that of the pure cellulose film under the same conditions, and the maximum deformation amplitude reached 7.3 mm. The tensile strength of the chitosan/cellulose composite film was 53.68% higher than that of the cellulose film, and the Young’s modulus was increased by 72.52%. Furthermore, in comparison with the pure cellulose film, the water retention of the composite film increased and the water absorption rate decreased obviously, which meant that the resistance of the material to changes in environmental humidity was greatly improved.Keywords:electroactive materials;electroactive properties;chitosan/cellulose composite film;[EMIM] Ac;mechanical properties
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CATALYSIS LETTERS
·
2019
·Vol. 149
·期 11
·2994-2999
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IF 2.372
Zhang Shengnan,Wang Hongmei,Cang Ruibai,Lu Bin,Zhao Jingxiang,Cai Qinghai
Abstract A composite material (FeSIL) prepared by FeCl 3 -imidazolium ionic liquid grafted on SBA-15 exhibited effective catalytic activity for solvent-free oxidation of styrene into benzaldehyde with high selectivity using H 2 O 2 oxidant and it presented easy recovery and reusability. In situ DRIFTS spectra for styrene and H 2 O 2 adsorption showed that an intermediate Fe 3+ –π surface complex on the catalyst surface was responsible for the activation of styrene and its reaction with H 2 O 2 molecules on the surface or in the bulk phase. Graphic Abstract Iron-chloride immobilized ionic liquid (FeSIL) was prepared by N -methylimidazole reacting with chloropropylsilane grafted on SBA-15 and coordinating of FeCl 3 to the imidazolium on the surface. The higher catalytic activity of the catalyst for effective oxidation of styrene under solvent-free condition were achieved The catalyst can be easily recovered and effectively reused without a significant loss in its activity.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Pengze Zhang,Zhaobin Jiang,Yanhong Cui,Guanqun Xie,Yangzhen Jin,Lingling Guo,Yiqi Xu,Qunfeng Zhang,Xiaonian Li
Gas phase catalytic process with the advantages of simply product separation and maximized atom economy, which was a green path used in industrial production. At present, heterogeneous dehydrochlorination catalysts are facing challenge of rapid deactivation caused by released HCl and carbon deposit. In this paper, a series of supported ionic liquid catalysts (SILCs) was synthesized by wet impregnation method and applied to 1, 1, 2-trichloroethane (TCE) dehydrochlorination to produce 1, 1-dichloroethylene (VDC). Tetraarylphosphonium chlorine was the active component with the unique acid resistance and the ability to dissolve coke, which determined the activity and stability of the catalyst. For 6%Tetraphenylphosphonium chloride (TPPC)/SiO 2 (260 °C, WHSV = 0.19 h −1 ), the conversion of 1, 1, 2-TCE was ＞99.5%, selectivity of VDC was 86%, and the catalytic activity remained stable within 1100 h. Herein, highly activity for dehydrochlorination was attributed to the strong hydrogen-bond basicity of Cl-, which was decided largely by the interaction between anion and cation of ionic liquid. The reaction mechanism was investigated using FTIR, XPS, TGA-MS, XRF, DFT calculation and two step elimination model induced by alkaline active center is proposed. Such catalysts provide a viable industrial solution to gas dehydrochlorination reaction and design of heterogeneous basic catalysts.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 38
·47981
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IF 2.188
Meng Cheng,Gangfu Song,Guifen Zhu,Dongyang Shi,Jing Fan
The extensive use of sulfonamides has caused serious ecotoxicological effects, sulfonamide antibiotics are difficult to remove when they are in their anionic form. In this work, a novel polystyrene supported ionic liquid (PS-CH 2 -[TSiIm][Cl]) material was prepared for the effective removal of sulfadiazine sodium (SDS). Results showed that the adsorption efficiency maintained relatively stable and high in a wide pH (6–10) and temperature (25–70 °C) ranges. SDS adsorbed onto the PS-CH 2 -[TSiIm][Cl] could be well evaluated by Langmuir model and the maximum adsorption capacity could be reached as high as 438.2 mg g −1 . Simultaneously, the PS-CH 2 -[TSiIm][Cl] exhibited excellent removal performance toward trace SDS at ppb level (0.005 mg L −1 ). Common inorganic ions such as K + , Na + , Ca 2+ , and Cl − had no effect of on the removal of SDS even if their concentrations were 20 000 times higher than that of SDS. And the PS-CH 2 -[TSiIm][Cl] was easy to regenerate without loss in adsorption performance. Additionally, the PS-CH 2 -[TSiIm][Cl] was applied to remove the SDS from environmental water samples. The possible adsorption mechanism was also investigated. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47981.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2019
·Vol. 411
·期 13
·2905-2914
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IF 3.286
Zou Bin,Chu Yanhong,Xia Jiaojiao
Acetylcholinesterase (AChE) biosensor technology is widely applied in the detection of organophosphate pesticides in agricultural production via the inhibition of AChE activity by organophosphates. However, the AChE electrode has some drawbacks, such as low stability and high overpotential. Combining the advantages of multiwalled carbon nanotubes (MWCNTs) and ionic liquids, we constructed a novel bienzyme electrode [Cl/iron porphyrin (FePP)-modified MWCNTs/AChE/glassy carbon electrode], which included AChE and mimetic oxidase FePP. In this electrode, FePP is covalently bound to the AChE carrier via ionic liquid for increased electrode sensitivity and stability. Under optimal conditions, this novel biosensor has a monocrotophos detection limit of 3.2 × 10 –11 mol/L and good recovery of 89–104%. After 5 weeks of storage at 4 °C, the oxidation current was 97.8% of its original value. The biosensor has high stability and sensitivity for monocrotophos detection and is a promising device for monitoring food safety.
The complete synthesis process of Cl/FePP–MWCNTs/AChE/GCE
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FLUID PHASE EQUILIBRIA
·
2019
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IF 2.514
Shicheng Yang,Guowei Liu,Junfeng Wang,Li Cui,Yongmei Chen
Lithium recovery from alkaline brine was carried out by solvent extraction (SX) using a hydroxyl-functionalized ionic liquid , 1-hydroxyethyl-3-methyl imidazolium bis(trifluoromethylsulfonyl)imide ([OHEMIM][NTf 2 ]) and a neutral ligand, trialkyl phosphine oxide (Cyanex923) as the extractants. Effect of extraction parameters, i.e. concentration of ionic liquid, extraction time, pH value of aqueous phase, phase ratio and mole ratio of sodium to lithium, on lithium extraction efficiency have been studied. Under the optimal parameters, over 93% of lithium was extracted in one single run. The extraction mechanism of lithium was investigated by the combination method of experiment and UV–visible spectroscopic characterization, and it was found that the ion exchange predominated during the extraction process. The extraction complex was determined by a slope analysis method, indicating that Cyanex923, Li + and [NTf 2 ] - formed a 2:1:1 complex. The thermodynamic study indicated that lithium extraction reaction was spontaneous. Based on the above results, [OHEMIM][NTf 2 ]-Cyanex923 extraction system showed a promising application in the recovery of lithium from alkaline brine.
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