Catalysts
·
2025
·Vol. 15
·期 7
·622
·
IF 4
Mengyue Chen,Tianqi Huang,Shuang Tong,Chao Wang,Ming Zhang
To address the challenge of ultra-deep desulfurization in fuels, a series of heteropolyacid-based poly(ionic liquid) catalysts (C4-PIL@PW, C8-PIL@PW, and C16-PIL@PW) were synthesized via radical polymerization and anion exchange methods. The prepared catalysts were characterized via FT-IR, XRD pattern, and Raman spectroscopy. Optimal reaction parameters (e.g., temperature, catalyst dosage, and O/S molar ratio) were systematically investigated, as well as the catalytic mechanism. The typical sample C8-PIL@PW exhibited exceptional oxidative desulfurization (ODS) performance, achieving a sulfur removal of 99.2% for dibenzothiophene (DBT) without any organic solvent as extractant. Remarkably, the sulfur removal could still retain 89% after recycling five times without regeneration. This study provides a sustainable and high-efficiency catalyst for ODS, offering insights into fuel purification strategies.
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Gels
·
2024
·Vol. 10
·期 2
·138
·
IF 5
Long Quan,Xueqian Shi,Jie Zhang,Zhuju Shu,Liang Zhou
A novel lignocellulosic aerogel, MT-LCA, was successfully prepared from MT by undergoing partial dissolution in an ionic liquid, coagulation in water, freezing in liquid nitrogen, and subsequent freeze-drying. The MT-LCA preserves its original honeycomb-like porous structure, and the newly formed micropores contribute to increased porosity and specific surface area. FT-IR analysis reveals that MT, after dissolution and coagulation, experiences no chemical reactions. However, a change in the crystalline structure of cellulose is observed, transitioning from cellulose I to cellulose II. Both MT and MT-LCA demonstrate a quasi-second-order kinetic process during methylene blue adsorption, indicative of chemical adsorption. The Langmuir model proves to be more appropriate for characterizing the methylene blue adsorption process. Both adsorbents exhibit monolayer adsorption, and their effective adsorption sites are uniformly distributed. The higher porosity, nanoscale micropores, and larger pore size in MT-LCA enhance its capillary force, providing efficient directional transport performance. Consequently, the prepared MT-LCA displays exceptional compressive performance and efficient directional transport capabilities, making it well-suited for applications requiring high compressive performance and selective directional transport.
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PubMed
高影响因子
ChemSusChem
·
2025
·
IF 6.6
Shucan Qin,Jiaming Mao,Longmei Shi,Shengyun Xu,Jinbiao Liang,Anshuang Wu,Yanrong Liu,Yunqian Ma
Preventing electrode passivation is a critical challenge in direct electrochemical desulfurization of aqueous solution systems. Here, a hydrophobic imidazole ionic liquid [HMIM]PF 6 was introduced into the electrode and electrolyte for constructing a new sulfide oxidation reaction (SOR) system. [HMIM]PF 6 was utilized as both a phosphating agent and a dopant in the synthesis of catalysts. It promoted the attachment of precursors to nickel foam, which was then fully selenized to form P-, F-, and N-doped Co 0.85 Se/NF. At a potential of only 0.29 V, a current density of 100 mA cm −2 was achieved, with no degradation in catalytic performance observed after 600 h of stability testing. [HMIM]PF 6 incorporated biphasic can prevent sulfur adhesion to the electrodes, because [HMIM]PF 6 accelerates the extraction of SOR products from the electrode phase. The SOR products were identified as S 8 and Na 2 SO 3 , which were successfully extracted using a novel green condensation reflux method, ensuring the recyclability of [HMIM]PF 6 . This work offers a novel approach to improve the electrochemical performance of the SOR. Graphical This article introduces a novel electrochemical sulfide oxidation reaction system utilizing the ionic liquid (IL) ([HMIM]PF 6 ) to effectively reduce sulfur-induced electrode passivation while promoting hydrogen production. The system achieved a current density of 100 mA cm −2 at 0.29 V with stability over 600 h. The biphasic system with [HMIM]PF6 facilitates S 8 and Na 2 SO 3 product extraction and ensures IL recyclability through an ecofriendly reflux method, offering a sustainable route for green H 2 generation and sulfur products recovery.
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PubMed
高影响因子
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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Nuclear Engineering and Technology
·
2021
·
IF 2.341
Hao Wu,Tatsuya Kudo,Seong-Yun Kim,Misako Miwa,Shigeo Matsuyama
A porous silica-based adsorbent was prepared by impregnating the pores of a silica support with the extractant 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (Calix[4]arene-R14) and an additive agent 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (C 2 mim + NTf 2 − ) as the materials to remove cesium(I) (Cs + ) ions from seawater. The as-prepared adsorbent showed excellent adsorption performance toward Cs + ions, with adsorption equilibrium reached within 2 h and an adsorption amount of 0.196 mmol/g observed. The solution pH, temperature, and the presence of coexisting metal ions were found to have almost no effect on Cs + adsorption. The adsorption mechanism was considered to proceed via ion exchange between Cs + and C 2 mim + . In addition, the particle-induced X-ray emission analysis results further clarified that the adsorbed Cs + ion species on the adsorbent was in the form of both CsCl and CsBr.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Hao Chen,Chaofang Li,Jing Yuan,Ding Bao,Fenghua Shen,Pingshan Wang,Xingzheng Dai,Zhanqing Lu,Kaisong Xiang,Hui Liu
The application of Fe-based ionic liquids (ILs) in elemental mercury (Hg 0 ) removal from flue gas is limited by the low oxidative activity of the Fe(III) center. Here, a strategy of engineering halogen ligand to enhance the oxidative activity of Fe-based ILs for mercury removal was proposed. We developed a series of ionic liquids [Bmim][FeCl 4-x Br x ] (x = 0–4) with varying ratios of Cl − and Br − ligand substitutions. Mercury removal performance evaluations demonstrated a positive correlation between the oxidative activity towards Hg 0 and the number of Br ligand substitutions in the ILs. [Bmim][FeBr 4 ] achieved ∼99 % removal efficiency in the temperature range of 50–150 °C, with a saturated adsorption capacity reaching 205.4 mg/g (at 150 °C). In-situ Raman spectroscopy, DFT calculations, Hg-TPD, and XPS collectively revealed that the introduction of Br significantly lowered the excitation energy of the ligand–metal p-d orbital electron transitions, which facilitates the generation of active bromine species with unfilled 4p orbital, consequently enhancing the oxidative removal performance of Fe-based ILs for Hg 0 . This work provides an application of metal-based ILs in the realm of mercury removal and broadens the scope of ligand–metal interaction for IL design.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhiwen Wang,Long Zhang,Xiong Shang,Weizhe Wang,Xinlin Yan,Chuang Yu,Li-min Wang
Na 3 SbS 4 -based solid electrolytes show the merits of a high ionic conductivity and aqueous-processible syntheses. However, Na 3 SbS 4 (NSS) is incompatible with metallic Na and Na alloys. Incorporation of an ionic liquid can solve this issue, but it is hard to coat it on sulfide powders homogeneously in a minimal quantity. Herein, a facile preparation is realized by using a PVDF filtration membrane with submicro-size vertical channels to constrain the flow of the liquid. By this constraint effect, the well mixed BMPTFSI and a NSS aqueous solution are soaked by the vertical channels and inhibited the segregation. Homogeneous BMPTFSI coating layers on NSS particles with a thickness less than 500 nm are encapsulated in the vertical channels after evaporating the water. The coating layers not only improve the physical contact of the NSS particles for enhanced ion transport, but more importantly effectively stabilize the interface between NSS and the metallic Na. The Na 3 V 2 (PO 4 ) 3 ||Na half cells with this composite electrolyte demonstrate superior cycling stability and good rate capability. This green method provides a facile way to optimize the interfacial performance for solid state batteries using ionic liquid.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yafei Sang,Jianhan Huang
Porous materials with high Brunauer-Emmett-Teller (BET) surface area ( S BET ) and abundant ionic active sites facilitate efficient CO 2 capture and conversion. Herein, a kind of novel benzimidazole-based hyper-cross-linked poly(ionic liquid)s (HPILs) were developed via the hyper-cross-linking strategy and the as-prepared HPILs possessed high S BET (485–780 m 2 /g), plentiful micro/mesoporosity, and abundant ionic active sites. The HPILs showed noteworthy CO 2 uptake (79–143 mg/g at 273 K and 1.0 bar), moderate isosteric heats (32–45 kJ/mol), and acceptable CO 2 /N 2 selectivity (IAST: 23–46). Intriguingly, HPILs-Cl-2 exhibited excellent catalytic activity for CO 2 cycloaddition and 99% of propylene oxide was successfully converted to cyclic carbonates under mild conditions (70 °C, 0.1 MPa CO 2 , 9 h). This synthetic strategy is of great importance for the functionalized hyper-cross-linked polymers and the synthesized HPILs are promising for efficient CO 2 capture and conversion under mild conditions.
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Energy Storage Materials
·
2020
·
IF 16.28
Jiewen Tan,Xin Ao,Alvin Dai,Yifei Yuan,Hao Zhuo,Hao Lu,Libin Zhuang,Yuxuan Ke,Chenliang Su,Xinwen Peng,Bingbing Tian,Jun Lu
Poly(ethylene oxide) (PEO)-based polymer electrolytes are promising candidates for solid-state electrolytes in safer, next generation lithium metal batteries. Despite their benefits however, PEO-based electrolyte exhibits highly crystalline ethylene oxide chains that provide poor ionic conductivity and, thus severely limit its practical application. Here, we report the use of hydroxypropyl trimethylammonium bis(trifluoromethane) sulfonimide chitosan salt (HACC-TFSI), which is an amorphous poly(ionic liquid) based biomass chitosan derivative, as a modifier for PEO-based solid polymer electrolytes (SPEs) to address these deficiencies. Hybrid SPEs with HACC-TFSI display enlarged amorphous regions with enhanced ionic conductivity. Interactions between quaternary ammonium cations and TFSI − anions in hybrid SPEs are also found to promote dissociation between Li + and TFSI − , which further increases ionic mobility. Moreover, the electrochemical stability, mechanical strength, and thermal stability of hybrid SPEs are collectively superior to blank SPEs without HACC-TFSI. LiFePO 4 /SPEs/Li full-cells assembled using 10wt% HACC-TFSI in PEO (10%HACC-TFSI/SPEs) electrolyte provide a capacity of 161.3 mAh g −1 and operate with excellent cycle performances at 0.2 C and 60 °C. Even when the temperature is increased to 150 °C, LiFePO 4 /SPEs/Li cells with 10%HACC-TFSI/SPEs still display remarkable cycle performance with 73% capacity retention after 100 cycles at 1 C rate.
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高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Qi Shen,DingYu Xing,Feiyun Sun,Wenyi Dong,Wentao Shang,Lingyan Zhao,Zijun Dong
Ceramic membrane bioreactor (CMBR) is an attractive alternative for wastewater treatment , although still subjects to fouling problem. This study facilely modified CM by oxidative polymerization of pyrrole with ionic liquid , to greatly enhance its conductivity and hydrophilic, and to sustainably mitigate fouling in an electric CMBR. Highly conductive ceramic membrane, BVIMBF 4 -CM, was facile obtained involving an ionic liquid 1-vinyl-3-butylimidazolium tetrafluoroborate (BVIMBF 4 ) on the base CM (Base-CM). After simple modification, the electrical resistance of CM was reduced significantly from 1017 Ω/sq to 349 Ω/sq, while its water contact angle decreased from 44.0° to 30.5°. With the assistant of minute electric field, BVIMBF 4 -CM exhibited a high rejection efficiency of over 85% Cu 2+ , 65% Ni 2+ and 93% bovine serum albumin (BSA). The interaction energy analysis verified BVIMBF 4 -CM itself prevent BSA from the membrane surface by the positive total interfacial energy. Meanwhile, the electrophoretic force provided by electric field enhanced the removal efficiency and antifouling capability of the BVIMBF 4 -CM. By using this modified CM to form an E-CMBR, a comparable removal efficiency as the CMBR could be stably obtained, which especially demonstrated significantly anti-fouling performance, as fouling rate decreased by 31.4–43.5%, and the total membrane resistance was only 60.8% of the Base-CM, under a minute electric field of 0.8 V/m. Enhanced hydrophilicity and conductivity of the BVIMBF 4 -CM take major responsible for this stable fouling alleviation in the E-CMBR. The new and facile method for CM modification proposed herein can serve as a reliable effort towards the application of antifouling E-CMBR system in wastewater treatment.
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2018
·
IF 2.631
Qian Zeng,Biao Hu,Hongye Cheng,Lifang Chen,Junmei Huang,Zhiwen Qi
Isobutyl isobutyrate is an important chemical which can be formed in a reactive extraction process with ionic liquid as dual solvent-catalyst. To design such an intensified process, the liquid-liquid equilibria (LLE) data for the esterification system involving ionic liquid are essential. In this work, the LLE of ternary systems {isobutyl isobutyrate (IBIBE) + isobutyric acid (IBAc) or isobutanol (IBOH) + 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIm][HSO 4 ])} and the quinary system {IBAc + IBOH + IBIBE + H 2 O + [BMIm][HSO 4 ]} were measured at temperature T = (298.2, 323.2 and 353.2) K, T = (323.2, 333.2, 343.2 and 353.2) K and atmospheric pressure, respectively. Based on the experimental data, the solute distribution coefficient and the selectivity were determined, which confirms the feasibility of the ionic liquid for isobutyl isobutyrate formation. The phase behaviour was explained by the molecular interaction using σ -potential analysis. Moreover, the binary parameters of the NRTL model for [BMIm][HSO 4 ] catalysed isobutyl isobutyrate formation system were fitted.
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2020
·Vol. 35
·期 4
·750-757
·
IF 0.64
Zhang Dongyu,Qu Rong,Zhang Haining,Zhang Fangfang
Amine-functionalized imidazolium-based poly(ionic liquid) brushes on mesoporous silica were synthesized via “grafting through” technique and were applied as model sorbents to understand physisorption and chemisorption of carbon dioxide molecules. The experimental results reveal that the total adsorption capacity of model sorbents derived from temperature programmed desorption (TPD) approach reaches 1.72 mmol·g −1 that is much higher than the sum of adsorption capacity of bare mesoporous silica and free polymers at 25 °C under carbon dioxide partial pressure of 0.2 bar. The proposed physical adsorption and chemical adsorption of carbon dioxide molecules in TPD response curves were validated by volumetric desorption measurement. It is also observed that physical adsorption is completely reversible and chemical adsorption is irreversible. The results demonstrate that the temperature programmed desorption technique is an effective approach to differentiate chemisorption and physisorption of gaseous species on solid sorbents, which is beneficial for understanding of adsorption mechanism and materials design.
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