Polymers
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2022
·Vol. 14
·期 7
·1274
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IF 4.967
Fujie Yang,Qingfeng Liu,Wenfei Xie,Pu Xie,Jingqi Shang,Xugang Shu
Solid electrolytes have been regarded as the most promising electrolyte materials for the next generation of flexible electronic devices due to their excellent safety and machinability. Herein, composite solid electrolytes (CSE) with “polymer in ceramic” are prepared by using lithium aluminum titanium phosphate (LATP) as a matrix and modified poly(ionic liquid) as a binder. The results revealed that adding a poly(ionic liquid)-based binder not only endowed good flexibility for solid electrolytes, but also significantly improved the ionic conductivity of the electrolytes. When the content of LATP in the CSE was 50 wt.%, the electrolyte obtained the highest ionic conductivity (1.2 × 10−3S·cm−1), which was one order of magnitude higher than that of the pristine LATP. Finally, this study also characterized the compression resistance of the composite solid-state electrolyte by testing the Vickers hardness, and the results showed that the hardness of the composite solid-state electrolyte can reach 0.9 ± 0.1 gf/mm2at a LATP content of 50 wt.%.Keywords:lithium aluminum titanium phosphate;poly(ionic liquid);solid-state electrolyte;ionic conductivity;hardness
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Materials
·
2022
·Vol. 15
·期 8
·2780
·
IF 3.748
Xuzhao Yang,Yarong Bai,Qing Li,Jun Wang
A mesoporous molecular sieve was prepared by the hydrothermal synthesis method with symmetric Gemini surfactant 1,3-bis(hexadecyldimethylammonio)-propane dibromide, symmetric Gemini ionic liquid surfactant 1,3-bis(3-hexadecylimidazolium-1-yl) propane dibromide and self-designed asymmetric Gemini ionic liquid surfactant 1-(3-(hexadecyldimethylammonio)prop-1-yl)-3-hexadecylimidazolium dibromide as the template agent. The structure characterization results for mesoporous molecular sieves show that the material possesses a hexagonal pore structure with uniform channels. The mesoporous silica that was synthesized with self-designed asymmetric Gemini ionic liquid surfactant as the template agent possesses the largest surface area and its pore size and specific surface area are, respectively, 3.28 nm and 879.37 m2/g. The adsorption properties of the prepared MCM-41 for crystal violet were investigated, and the adsorption thermodynamics and kinetics were investigated. The results show that adsorption equilibrium can be reached under pH = 9 and 35 °C for 50 min, and the quantity of adsorption can reach up to 464.21 mg/g. The adsorption process belongs to Langmuir isothermal adsorption, conforming to second-order adsorption kinetics, and the adsorption process is an endothermic process.Keywords:Gemini ionic liquid surfactants;mesoporous molecular sieves;crystal violet;thermodynamics;kinetics
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Advanced Materials Interfaces
·
2022
·Vol. 9
·期 13
·2102570
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IF 6.389
Hua-Li Wang,Yi-Xin Wang,Ze-Hui Liang,Hao-Cheng Yang,Zhi-Kang Xu
Slippery liquid-infused porous surfaces have received great attention in anti-adhesion applications, and ionic liquids are selected as the infiltrated liquid in recent research due to their non-volatility. Beyond the complicated steps, infiltrating the viscous ionic liquid within a porous structure is challenging during the conventional fabrication process. Herein, a facile method is proposed to fabricate polyurethane-based slippery ionic-liquid-infused coatings in one step through a phase separation process. The solid structure grows from the ionic liquid through a liquid–liquid phases separation process. The coatings perform excellent anti-bacterial and anti-icing properties owing to the biocide nature, lubricity, and low freezing point of ionic liquids.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2022
·Vol. 24
·期 42
·25950-25961
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IF 3.945
Baihua Chen,Ce Shi,Shijie Xiong,Kaige Wu,Yanqiu Yang,Wanjun Mu,Xingliang Li,Yuchuan Yang,Xinghai Shen,Shuming Peng
Herein, we report a four-step mechanism for the spontaneous multi-scale supramolecular assembly (MSSA) process in a two-phase system concerning an ionic liquid (IL). The complex ions, elementary building blocks (EBBs), [EBB]n clusters and macroscopic assembly (MA) sphere are formed step by step. The porous large-sized [EBB]n clusters in the glassy state can hardly stay in the IL phase and they transfer to the IL–water interface due to both electroneutrality and amphiphilicity. Then, the clusters undergo random collision in the interface driven by the Marangoni effect and capillary force thereafter. Finally, a single MA sphere can be formed owing to supramolecular interactions. To our knowledge, this is the first example realizing spontaneous whole-process supramolecular assembly covering microscopic, mesoscopic and macroscopic scales in extraction systems. The concept of multi-scale selectivity (MSS) is therefore suggested and its mechanism is revealed. The selective separation and solidification of metal ions can be realized in a MSSA-based extraction system depending on MSS. In addition, insights into the physicochemical characteristics of ILs from microscopic, mesoscopic to macroscopic scales are provided, and especially, the solvation effect of ILs on the large-sized clusters leading to the phase-splitting is examined. It is quite important that the polarization of uranyl in its complex, the growing of uranyl clusters in an IL as well as the glassy material of uranyl are investigated systematically on the basis of both experiment and theoretical calculations in this work.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Xiaofei Ma,Jing Cao,Juan Yu,Liangliang Cai
Herein, an ionic liquid chiral selector based on sulfobutylether-β-cyclodextrin (SBE-β-CD) was prepared for enantioseparation in capillary electrophoresis (CE) for the first time. Compared to native SBE-β-CD, ionic liquid (SBECDIL) exhibited much more superior enantioselectivity towards several model drugs. Differentiating with the previous research, the introduction of ionic liquid in this study did not prolong the migration time obviously for most analytes. Factors affecting the enantioseparations including ionic liquid concentration, type and proportion of organic solvents, buffer pH and applied voltage were investigated in detail. Furthermore, the established method was successfully used to determinate the enantiomeric purity of amlodipine besylate (AML). In addition, capillary electrophoresis, nuclear magnetic resonance (NMR) and molecular modeling were employed to probe into the chiral recognition mechanism. Several interactions jointly promoted the enantioseparations in CE.
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Inorganic Chemistry Frontiers
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2022
·Vol. 9
·期 15
·3679-3691
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IF 7.779
Lei Fan,Lianming Zhao,Yuchao Lv,Tinghu Wang,Yupeng Tian,Jianye Fu,Xinmei Liu
The synthesis of highly-dispersed non-noble metal based catalysts and their application in hydrogenation/dehydrogenation still remain challenging. Therefore, it is of great importance to protect metals from aggregation in both calcination and reduction processes. In this research, density functional theory (DFT) calculations were used to elucidate the stabilization effect of ionic liquid [Bmim][BF4] on Ni in the reduction process, showing that [Bmim][BF4] could efficiently inhibit Ni aggregation on the support. By further analysis combined with theoretical calculations, we found that the degree of metal dispersion before reduction directly determines the effect of [Bmim][BF4]. Guided by the DFT results, the method of co-assisted preparation of Ni/SAPO-11 using [Bmim][BF4] and lysine was adopted. Lysine forms a coordination compound with nickel oxides. The steric hindrance generated by the Ni–lysine complex can effectively inhibit the aggregation of nickel oxides during the calcination process. The DFT calculations revealed that during the reduction process, [BF4−] plays a dominant role in stabilization and electronic modulation by directly interacting with Ni on the support. The combination effects of [Bmim][BF4] and lysine effectively inhibit metal aggregation, leading to ultra-small nickel particles with a mean size of 4.4 nm over the obtained catalyst. Furthermore, the presence of [Bmim][BF4] also tunes the electronic state of Ni species. Using hexane isomerization as a probe reaction, the result indicates the excellent catalytic activity of the obtained catalyst (≈93.7% isomer selectivity at 63.5% conversion), much superior to that of Ni/SAPO-11 obtained from the traditional impregnation route (≈75.8% isomer selectivity at 64.6% conversion). This work provides a new method for the preparation of highly effective non-noble metal supported catalysts.
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BioEnergy Research
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2022
·Vol. 16
·期 2
·1108-1120
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IF 3.852
Xie Ruosong,He Weiwei,Qu Guangfei,Wu HuanHuan,Li Ziying,Li Junyan,Li Weijie
The application of biomass pyrolysis was still limited owing to the high pyrolysis temperature and the complicacy of pyrolysis products. In this work, a homogeneous low-temperature cellulose catalytic pyrolysis system is proposed to directional products 5-methylfurfural. The low-temperature catalytic activity and products distribution of cellulose pyrolysis in [bmim][FeCl 4 ] (Fe-IL) and [bmim] 2 CoCl 4 (Co-IL) at temperature gradients from 150 to 300 °C were studied. As the results, both Fe-IL and Co-IL can catalyze the pyrolysis of cellulose, especially for Fe-IL, which effectively reduced the pyrolysis temperature of cellulose to 200 °C. Nano-scale and micron-scale particles were produced by the catalysis of Fe-IL and Co-IL, respectively. Fe-IL have a high selectivity for the production 5-methylfurfural (5-MF) and furfural (FF), which were 71.12% and 19.14% respectively at the pyrolysis temperature of 200 °C. Furthermore, the mechanism of low-temperature catalytic pyrolysis and the directional evolution mechanism of 5-MF and FF were suggested. Graphical abstract
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Ningxin Zhang,Ping Li,Xuan Li,Shaokun Tang
Covalent organic frameworks (COFs) have been considered promising hydroxide-conducting materials for their highly ordered crystalline porous structure and tunable functionality. However, the lack of hydroxyl conduction functional groups on the COFs frameworks restricts their further development in anion exchange membrane fuel cells (AEMFCs). At present, impregnated ionic liquids (ILs) are mainly used to solve this problem, but they still face the challenge of ILs leakage under working conditions. Here, we report a novel IL-functionalized covalent organic framework (IL-COF), which is prepared by grafting guanidinium-based IL onto the channel walls of COF via the Williamson ether reaction and then doped into guanidinium-functionalized poly(2,6-dimethyl-1,4-phenylene oxide) (GPPO) to prepare IL-COF/GPPO composite membranes . The ILs grafted into the COFs nanochannels act as the “active sites” in the membranes to enhance the migration rate of the hydroxide ions and thus improve the conductivity. Accordingly, the hydroxide conductivity of the resultant IL-COF/GPPO composite membrane with IL-COF doping amount of 5 wt% can reach up to 89.93 mS cm −1 at 80 °C under hydrated condition, 61% higher than that of the pristine GPPO membrane. Meanwhile, its hydroxide conductivity retains 90.31% after alkaline treatment for 14 days. Compared with IL-impregnated COF composite membrane (IL@COF/GPPO), IL-COF/GPPO membrane has superior hydroxyl conductivity and long-term stability since chemical grafting can more firmly immobilize ILs into COF channels than impregnation.
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Molecular Catalysis
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2022
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IF 5.089
Yifan Liu,Li Dong,Yichao Wang,Qian Su,Xianghai Meng,Weiguo Cheng
Polymeric ionic liquid membranes (PILMs) were prepared by photo-initiated polymerization of DMAEMA-based ionic liquids (ILs) and co-monomers for the conversion of CO 2 into cyclic carbonates. The influences of functional groups and anions were investigated to find the optimal ionic liquid monomer. The PILM based on [DMAEMA-EtOH]Br exhibited the highest propyl carbonate (PC) yield (98%), which was close to that of the [DMAEMA-EtOH]Br monomer. Moreover, the PILMs can catalyze the gas state propylene oxide (PO) and CO 2 into PC with a PO conversion of 87.3%, while the PO conversion of the pure polymeric ionic liquids was only 3.1% for gas state PO. The excellent catalytic activity can be attributed to the highly active catalytic sites and superb swelling ability of PILMs. The dry PILMs could absorb the PO vapor and swell into membranes with abundant pores, which contained plentiful active sites to catalyze PO and CO 2 to PC efficiently.
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ACS Applied Materials & Interfaces
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2021
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IF 9.229
Ningning Zhu,Kaixuan Xu,Jun Xing,Jun Zhang,Jiangnan Dai
In quasi-two-dimensional (quasi-2D) perovskite films, carriers transport in the cascade structural systems involving various quantum wells (QWs) n, but their efficiency is limited by the severe nonradiative recombination within plentiful n = 1, 2, 3 domains induced by traditional ammonium bromide passivation. Here, we fabricate the quasi-2D films with the elimination of n = 1, 2, 3 domains by introducing the ionic liquid n-butylamine acetate (BAAc) instead of n-butylamine hydrobromide (BABr), which increases the photoluminescence quantum yield (PLQY) and lowers the surface roughness of films. Due to the anion exchange between BAAc and methylamine hydrobromide (MABr), BAAc exhibits a sole passivation effect on methylamine-based perovskites. As a result, the ionic liquid-derived perovskite light-emitting diodes (PeLEDs) display blue emission at 479 nm and show significantly improved performance on external quantum efficiency (EQE) and luminance. Our finding provides insights into the passivating effect of ionic liquid on quasi-2D perovskites and will benefit fabricating PeLEDs with enhanced performance.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Hongshuai Zheng,Jiaqi Huang,Tao Dong,Yifan Sha,Haitao Zhang,Jie Gao,Suojiang Zhang
In light of the increasing demand for environmental protection and energy conservation, the recovery of highly valuable metals, such as Li, Co, and Ni, from spent lithium-ion batteries (LIBs) has attracted widespread attention. Most conventional recycling strategies, however, suffer from a lack of lithium recycling, although they display high efficiency in the recovery of Co and Ni. In this work, we report an efficient extraction process of lithium from the spent LIBs by using a functional imidazolium ionic liquid. The extraction efficiency can be reached to 92.5% after a three-stage extraction, while the extraction efficiency of Ni-Co-Mn is less than 4.0%. The new process shows a high selectivity of lithium ion. FTIR spectroscopy and ultraviolet are utilized to characterize the variations in the functional groups during extraction to reveal that the possible extraction mechanism is cation exchange. The results of this work provide an effective and sustainable strategy of lithium recycling from spent LIBs.
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LANGMUIR
·
2021
·
IF 3.882
Xuelian Wang,Mei Liu,Xueqin Ding
Six hydrophobic magnetic guanidinium ionic liquids (HMILs) were designed and prepared for the extraction of DNA. The physical and thermal properties of the HMILs were characterized using vibrating sample magnetometry, density meter, rotational rheometer, Karl Fischer moisture, Fourier transform infrared spectrometry, and thermogravimetric analysis. Single-stranded DNA and duplex DNA extracted by HMILs can be rapidly collected by a magnet. Three assisted extraction methods, including vortex extraction, mechanical shaking extraction, and ultrasonic extraction, were introduced to extract DNA with HMILs and the extraction efficiencies were evaluated using NanoDrop. Influencing factors of the DNA extraction were comprehensively evaluated, involving the HMIL volume, extraction time, pH, and extraction temperature. The HMIL-based extraction method can well extract DNA from complex matrices and Escherichia coli cell lysates.
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