Separations
·
2025
·Vol. 12
·期 11
·
IF 2.7
Zhaojin Zhang,Subhan Mahmood,Yu Cao,Shun Yao
At present, ionic liquids (ILs) are increasingly being used to extract natural products as green solvents, but their residues can lead to risks in terms of further use for the extracted herbal materials. Therefore, it is necessary to remove them with simple and effective methods. For example, after the toxic anthraquinones inPolygonum multiflorumare removed by extraction with the IL of [C4Bim][PTSA], it needs to be recovered and reused, and the useful stilbene glycosides should not suffer from obvious loss as they are the main functional components. In this study, an ultrasonic method withn-propanol was used to remove the residual [C4Bim][PTSA] in the solid powders ofPolygonum multiflorumthat had been extracted for anthraquinones. After single-factor optimization, the removal conditions were as follows: the removal temperature was 303.15 K, the solid–liquid ratio was 1:200 (w (1 g):v (200 mL)), the ultrasonic time was 40 min, and there were four operations. Under these conditions, ILs could be completely removed with almost no loss of stilbene glycosides in solid powders. After that, the IL in the extracting solution and scrubbing solution was recovered by the back-extraction method, and an IL with high purity could be obtained for reuse. The total recovery efficiency of the IL reached more than 98%. Then gas chromatography (GC) was conducted for the determination of residual ethanol andn-propanol in the solid powders ofPolygonum multiflorum, which could be used to quickly detect the contents of two organic solvents within three minutes. Besides that, the method could also be applied to the determination of residual organic solvents in the raw materials ofPolygonum multiflorum, and the results showed that the residue of ethanol andn-propanol in the solid powders were in accordance with the general provisions of the currentChinese Pharmacopoeia. According to the developed procedures and optimized conditions, the recovered IL could be reused in five runs at least. General applicability and greenness assessment for the developed process also proved that it is an ideal method, which has potential in large-scale application.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Xuexue Ding,Siyuan Liu,Feng Wang,Shuang Zhao,Juqun Xi,Defeng Wu
Expanding the application of carboxymethyl konjac glucomannan (CMK) beyond the fields of food and medicine is very important for enhancing the high-value utilization of konjac glucomannan (KGM) derivatives. Herein, we used CMK and poly(vinyl alcohol) (PVA) as the matrices and ionic liquids (ILs)/glycol (Eg)/water as the mixed solvents to construct a hydrogel with multi-dissipative structures. Eg acted as plasticizer, leading to the swelling of the CMK/PVA chain entanglements. This was able to compensate for the loss of PVA crystallinity caused by the CMK-PVA hydrogen bonding, and also favored enhancing electrostatic interactions and hydrogen bonding between ILs and CMK/PVA chains simultaneously. Owing to this synergism, the mechanical properties of hydrogel were remarkably improved. The strength and elongation of the hydrogel with optimized ILs/Eg ratio (1/4) are 1.3 MPa and 1266.9 %, respectively, much higher than those of the hydrogels only with ILs (PCB, 0.7 MPa and 738.1 %) and only with Eg (PCE, 0.7 MPa and 690.5 %). The anti-freezing ability, and the tolerance to dehydration and swelling, were also significantly improved. Thus, the flexible strain sensor prepared could be well applied in harsh environments. Furthermore, by controlling the heterogeneity of ILs, the actuating ability of hydrogel could be activated through a bilayer structuring strategy. This work opens up new application scenarios of CMK-based hydrogels in the fields other than the traditional hydrocolloid areas.
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高影响因子
Nanoscale
·
2014
·Vol. 7
·期 3
·1116-1126
·
IF 6.739
Fa-tang Li,Qing Wang,Jingrun Ran,Ying-juan Hao,Xiao-jing Wang,Dishun Zhao,Shi Zhang Qiao
Heterostructured BiOBr/Bi24O31Br10 nanocomposites with surface oxygen vacancies are constructed by a facile in situ route of one-step self-combustion of ionic liquids. The compositions can be easily controlled by simply adjusting the fuel ratio of urea and 2-bromoethylamine hydrobromide (BTH). BTH serves not only as a fuel, but also as a complexing agent for ionic liquids and a reactant to supply the Br element. The heterojunctions show remarkable adsorptive ability for both the cationic dye of rhodamine B (RhB) and the anionic dye of methylene orange (MO) at high concentrations, which is attributed to the abundant surface oxygen vacancies. The sample containing 75.2% BiOBr and 24.8% Bi24O31Br10 exhibits the highest photocatalytic activity. Its reaction rate constant is 4.0 and 9.0 times that of pure BiOBr in degrading 50 mg L−1 of RhB and 30 mg L−1 of MO under visible-light (λ > 400 nm) irradiation, respectively, which is attributed to the narrow band gap and highly efficient transfer efficiency of charge carriers. Different photocatalytic reaction processes and mechanisms over pure BiOBr and heterojunctions are proposed.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2016
·Vol. 40
·期 7
·6036-6045
·
IF 3.277
Xiaoqin Fu,Xiaoli Sheng,Yuming Zhou,Zhiwei Fu,Shuo Zhao,Zewu Zhang,Yiwei Zhang
Hierarchical zeolites have bridged the gap between conventional zeolite and mesoporous materials, which not only maintain the excellent advantages of microporous sieves, but also effectively resolve the diffusion limitations. Herein, a novel alkoxy-functionalized ionic liquid was employed as a mesoporous structure-directing agent to synthesize hierarchical aluminosilicates with dual micro–mesoporous channels. X-ray diffraction (XRD), N2 adsorption–desorption isotherms (BET), scanning electron microscopy (SEM), transmission electron microscopy (TEM), temperature-programmed desorption (TPD), thermogravimetric analysis (TGA) and 27Al magic-angle spinning nuclear magnetic resonance (27Al MAS NMR) were used to characterize the structural and textural features of the hierarchical aluminosilicates. The results showed that the ionic liquid (MTPI) employed played the role of a mesoporous structure-directing agent which was trapped within the pores of a faujasite structure through –Si–O–Al– and –Si–O–Si– linkages. The mesoporous diameters and structures of the final hierarchical materials could be uniformly tailored by tuning the added amount of template. Hierarchical aluminosilicates with the combined advantages of both mesoporous properties and the microporous crystalline structure of zeolites exhibited high catalytic activity and resistance to deactivation in the alkylation of o-xylene with styrene, as compared to the conventional zeolite with the sole presence of micropores. The distinct catalytic performance of hierarchical aluminosilicates could be attributed to the short diffusion routes and abundant exposed acidic sites on the external surface.
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高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Yang Nan,Wen Li,Shaojie Li,Qi Wei,Weiping Li
Aluminum coating is a potential candidate for cadmium coating replacement due to its excellent corrosion resistance and nontoxicity. Among the fabrication methods of Al coating, plating Al via ionic liquids has drawn major attention of researchers because of the superiority of controllability, stability and low energy consumption. However, the evolution rules of plating aluminum on high-strength steel via pulse current modes at room temperature requires deeper investigation. In this work, pulse current density and pulse duty factor are regulated to reveal the plating patterns of Al on 300M high-strength steel in AlCl 3 -EMIC (2:1 in mole) ionic liquid. It is found that higher current density can significantly facilitate the nucleation of Al grains and the compactness of morphology, while an enlarged pulse duty factor tends to result in more regular Al crystals. When the current density and the pulse duty factor are fixed at 20 mA cm −2 and 80 %, the densest and most uniform aluminum coating is obtained. The component of Al coating is verified to be pure Al crystals with good adhesion and the plating process achieves a high current efficiency of 97.27 %. Under the protection of Al coating, the impedance and galvanic corrosion current density of 300M steel substrate are optimized by two orders of magnitude, and the corrosion current density is markedly decreased from 5.58 μA cm −2 to 0.77 μA cm −2 .
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高影响因子
ChemElectroChem
·
2017
·Vol. 5
·期 2
·328-334
·
IF 4.136
Sijian Li,Zhengxi Zhang,Kaihua Yang,Li Yang
A new family of composite polymer electrolytes (CPEs) is developed by blending pyrrolidinium-based polymeric ionic liquid [P(DADMA)TFSI], poly(ethylene glycol) [PEG800], and lithium bis(trifluoromethanesulfonyl) imide (LiTFSI). The structure, thermal behavior, electrochemical properties of these CPEs, as well as their potential application in high-temperature lithium-ion batteries (LIBs) are studied. The FTIR result reveals the interactions among P(DADMA)TFSI, PEG800, and Li + cations. X-ray diffraction and differential scanning calorimetry measurements show that the as-prepared CPEs have amorphous structures. Furthermore, CPEs exhibit satisfactory ionic conductivity, as well as high thermal and electrochemical stabilities. In addition, Li/LiFePO 4 cells with the as-prepared CPE at 0.2C rate can achieve a discharge capacity of about 150 mA h g −1 at 80 o C, with good capacity retention. These findings indicate that the as-obtained CPEs have great potential for applications as safe electrolytes in high-temperature LIBs. Graphical PEG power : Polymeric ionic liquid-poly-(ethylene glycol) composite electrolytes show good ionic conductivity, high thermal and electrochemical stabilities, and allow successful battery operation at high temperature.
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高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 15
·4374-4381
·
IF 6.641
Qikai Li,Manjiao Deng,Shuangmeng Zhang,Duokai Zhao,Qinglin Jiang,Chuanfei Guo,Qing Zhou,Weishu Liu
Flexible thermoelectric films have received increasing attentions due to their ability to generate power for use in vigorous wearable electronics and internet of things (IoT) sensors. In this study, synergistic enhancements in both the thermoelectric and mechanical performances of poly(3,4-ethylenedioxythiophene) (PEDOT)-based flexible thermoelectric films were obtained by utilizing the modulation effect of an ionic liquid (IL), in this case bis(trifluoromethane)sulfonimide lithium salt (LiTFSI). The electrical conductivity of the as-fabricated ionic liquid/poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonate) (IL/PEDOT:PSS) films increased from 5 S cm−1 (IL-free PEDOT) to nearly 1000 S cm−1 (PEDOT with 60 wt% IL content). Simultaneously, the thermoelectric power factor of the PEDOT thin film was boosted by nearly two orders from less than 1 μW m−1 K−2 to 75 μW m−1 K−2 due to the modulated electrical conductivity and enhanced Seebeck coefficient with increasing temperature. Furthermore, mechanical bending tests showed that the electrical conductivity change was less than 0.03% after 10 000 bending cycles, which is much better than that of the IL-free film, suggesting good bendability. The tensile test indicated enhancements in the tensile strain of free-standing films from less than 3% to more than 20% before and after adding LiTFSI into PEDOT:PSS. X-ray diffraction (XRD) and Raman measurements demonstrated that the enhancements in both the thermoelectric and mechanical performances were related to the increased ordering structure due to the weak chemical bonding effect between PEDOT and the ILs. The as-prepared IL/PEDOT:PSS thermoelectric films have promising applications for wearable electronics.
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高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2021
·
IF 4.724
Xin Zhang,Aimin Liu,Fengguo Liu,Zhongning Shi,Baoguo Zhang,Xu Wang
An aluminum-containing solvate ionic liquid, DMI–AlCl 3 (1 M)–MgCl 2 (0.5 M) was used as the electrolyte for magnesium electrodeposition. The results of Raman spectroscopy and 27 Al nuclear magnetic resonance spectroscopy indicated the existence of aluminum-containing [AlCl 4 ] - and [AlCl 2 (DMI) 4 ] + in the DMI–AlCl 3 (1 M) system. When 0.5 M MgCl 2 was added to DMI–AlCl 3 , the Mg(II) species was [MgCl(DMI) n ] + . X-ray diffraction analysis indicated that a coating of Al 3 Mg 2 can be prepared by potentiostatic electrodeposition at −1.45 V (vs. Al) at 323 K on a copper sheet cathode.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Xiao-Min Zhang,Zhuo-Heng Tu,He Li,Lei Li,You-Ting Wu,Xing-Bang Hu
In this work, four diamine-monocarboxylate-based protic ionic liquids (PILs) were firstly introduced to prepare supported ionic liquid membranes (SILMs) and the selective separation of CO 2 /N 2 and CO 2 /CH 4 gas pairs in these SILMs under humidified condition were investigated. The effects of transmembrane pressure and temperature on the permeablity of CO 2 and the permselectivity of CO 2 /N 2 and CO 2 /CH 4 gas pairs were also studied. It is found that the supported PILs with 15 wt% water exhibit much higher CO 2 permeabilities under humidified conditon than those pure PILs under dry condition. The permeability increases with the decreasing transmembrane pressure, indicating a typical feature of facilitated transport membrane . The permeability of CO 2 increases with the increasing temperature whereas the permselectivity of CO 2 /N 2 and CO 2 /CH 4 decreases at the same time. The highest CO 2 /N 2 selectivities obtained is 151, and the highest CO 2 /CH 4 selectivities is 72. These PILs is found to be tunable and selective carriers of CO 2 in the presence of water, and the supported protic-ionic liquid membranes exhibit competitive permeability and higher permselectivity in comparison with the supported aprotic- ionic- liquid membranes.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jiaqi Huang,Xiaowei Chi,Yuexiu Du,Qiliang Qiu,Yu Liu
The side reaction and dendrite of a zinc anode in an aqueous electrolyte represent a huge obstacle for the development of rechargeable aqueous Zn batteries. An electrolyte with confined water is recognized to fundamentally stabilize the zinc anode. This work proposes acetamide/zinc perchlorate hexahydrate (AA/ZPH) ionic liquid (IL)-polyacrylamide (PAM) polymer electrolytes, here defined as IL-PAM. The novel Zn2+-conducting IL is able to accommodate trace water and can achieve both high conductivity (15.02 mS cm–1) and alleviation of side reactions (>90% reduction). Cross-linked PAM acts as the three-dimensional framework to suppress dendrites and obtain flexibility. As a result, the Zn anode with IL-PAM can cycle stably over 2000 h with a record highest cumulative capacity of 3000 mAh cm–2 and well-preserved morphology. Based on IL-PAM, the flexible LFP|Zn hybrid batteries can be successfully assembled and operate normally in series and parallel conditions. Moreover, the low volatility of IL and binding forces exerted by the PAM network endues IL-PAM with an anti-dehydration property. In a 50 °C unsealed environment, the weight loss of IL-PAM is about two-fifths of PAM hydrogel and an aqueous electrolyte, and the corresponding hybrid battery with IL-PAM can also prolong a 4 times longer lifespan.
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高影响因子
ELECTROCHIMICA ACTA
·
2012
·
IF 3.832
G.F. Cai,C.D. Gu,J. Zhang,P.C. Liu,X.L. Wang,Y.H. You,J.P. Tu
Nanostructured nickel oxide (NiO) thin films were prepared by a simple electrodeposition in choline chloride-based ionic liquid followed by an oxidation in air. Uniform granules and some voids opened between these granules were presented in the polycrystalline NiO films deposited for 10 and 30 s, but the film became compact as the deposition time increased to 60 s. The optical transmittance of the film decreased with the increase of the film thickness. All the NiO films exhibit high coloration efficiency, fast electrochromic switching and good cycling durability. The ultra fast switching time (0.74 s and 0.88 s) and maximum coloration efficiency of 250 cm 2 C −1 were observed for the film deposited for 10 s.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xiang Gao,Jiajia Zhao,Hao Song,Xintong Zhou,Yuehua Deng,Jiali Liu,Yanrui Li
Graphitic carbon nitride (CN), a promising photocatalyst for CO2 reduction, suffers from inefficient light harvesting and sluggish charge separation dynamics, which severely restricts its application. Ionic liquids (ILs) have been used for the assisted preparation of photocatalysts, thus effectively altering their geometric and electronic properties. Herein, the 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim]PF6) IL was introduced as a modifier to successfully construct a P- and F-co-doped porous CN catalyst via simple calcination of the IL and urea without any organic solvents and templates. The optimized catalyst exhibited an enhanced photocatalytic activity for CO2 reduction via gas–solid mode under visible light irradiation, achieving CO and CH4 evolution rates of 39.9 and 2.63 μmol g−1 h−1 (CO selectivity of 94%), which were 7.8 and 4.8 times higher than those of pristine CN, respectively. PFCN also demonstrated excellent reusability and stability. Comprehensive characterization revealed that the strategy of doping of P and F atoms significantly enlarged the surface area, improved CO2 adsorption, broadened visible-light harvesting, and accelerated charge transfer and separation efficiency. This work highlights the potential of ILs as multifunctional agents for designing high-performance doped CN photocatalysts.
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高影响因子
危险品化学品经营许可证（带存储）