ACS Omega
·
2025
·
IF 4.3
Jiaxin Cui,Mengfan Yin,Tao Zheng,Han Liu,Rui Zhang,Haiyan Liu,Zhichang Liu,Chunming Xu,Xianghai Meng
The separation of olefins and alkanes is beneficial for resource utilization of oil products, and liquid–liquid extraction is an important method of liquid-phase olefin/alkane separation. This study investigated the feasibility of bimetallic ionic liquids for the extraction of olefin from liquid-phase olefin/alkane mixtures using 1-hexene/n-hexane as a model hydrocarbon mixture. The bimetallic ionic liquids were first synthesized from different metal chlorides (ZnCl2, SnCl2, AlCl3, FeCl3) and CuCl with triethylamine hydrochloride. This newly prepared Fe–Cu bimetallic ionic liquid [Et3NH]Cl–0.47FeCl3-0.8CuCl had a good extraction performance, and the extraction selectivity could reach up to 8.41, which was about 4 times that of the organic solvent such as N-formylmorpholine and γ-butyrolactone used in the industry. The liquid–liquid equilibrium (LLE) of 1-hexene/n-hexane and Fe–Cu bimetallic ionic liquid system was investigated under different extraction temperatures, extraction times, and mass ratios of extractant to feed. Through 5 recycling experiments, the extraction selectivity decreased by less than 2%, and the characteristic peaks of the recovered bimetallic ionic liquids were unchanged by IR analysis, which proved that the bimetallic ionic liquid had excellent reversibility. Furthermore, the mechanism of 1-hexene extraction was investigated by quantum chemistry calculation and Raman spectroscopy, and there was π-complexation between Cu+ and 1-hexene. Then, the charge density of Cu+ in bimetallic ionic liquids was larger than that of cuprous-based ionic liquids. The results revealed that the addition of FeCl3 could activate Cu+ and weaken the Cu–Cl bond, enhancing the ability of the bimetallic ionic liquid to extract 1-hexene. Therefore, [Et3NH]Cl–0.47FeCl3-0.8CuCl was a good potential extractant during the efficient extraction of 1-hexene.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 26
·11776-11782
·
IF 2.7
Yuwei Yan,Hongyan Li,Songnan Li,Jiawei Zhang,Jingxiang Zhao,Qinghai Cai
Copper, iron–chloride ionic liquids (ILs) were immobilized on SBA-15 via N-methylimidazole grafting with C–Cl in chloropropylsilane pre-anchored on SBA-15, followed by FeCl3 and CuCl2 coordination to imidazolium chloride to generate a double metal IL-supported mesoporous composite (SIL-CuFe). The prepared composite exhibited an effective catalytic performance for the solvent-free oxidation of styrene to benzaldehdye (BzH) with H2O2 oxidant, offering 51% conversion, a turnover number (TON) of 330.5 mol molFe+Cu−1, and a selectivity of 71% at a reaction temperature of 70 °C. The composite catalyst can be easily recovered and effectively reused without a significant loss in activity and selectivity. The quenching experiments by adding tert-butanol (TBA), 1,4-benzoquinone (p-BQ) and L-histidine (L-HIS) in the reaction system were conducted to identify the type of reactive O species, specifically ˙OH, ˙O2−, and 1O2, produced by catalyst activation with H2O2 and played a main role in the oxidation. The reaction mechanism of the oxidation process is also proposed.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Haiyan Jiang,Bingbing Yang,Kuilin Peng,Zetao Liu,Shaojuan Zeng,Xiangping Zhang,Lu Bai
The combination ionic liquids (ILs) with membranes is a potential method for direct NH 3 separation. In particular, ILs can modulate the interactions with NH 3 and construct pathways in membranes for preferential NH 3 transport, which is expected to overcome the trade-off effect and achieve a desirable separation performance. In this work, four metal ILs (MILs) with different metal centres and hydrogen bond donating ability, including [2-Mim][Li(NTf 2 ) 2 ], [Eim][Li(NTf 2 ) 2 ], [Bmim] 2 [Co(NCS) 4 ], and [Bim] 2 [Co(NCS) 4 ], were incorporated into sulfonated block copolymers to prepare MIL-based hybrid membranes for NH 3 separation. The investigation of structure–performance relationships suggested that the interaction sites and transport channels could be tuned by the MIL type, which greatly affects the NH 3 separation performance of the membranes. The Nexar/2-Mim-Li-10 membrane exhibits NH 3 permeability of 735.6 Barrer with NH 3 /N 2 selectivity of 844.5 and NH 3 /H 2 selectivity of 154.7, which is higher than other MIL-based hybrid membranes owing to self-assembled transport channels and moderate complexation. Increasing the MIL content and feed pressure significantly improved NH 3 separation performance.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yanyan Cheng,Fujian Li,Qingrong Wu,Kuilin Peng,Bangyu Fan,Yinge Bai,Zhongzhi Wang,Nian Zhang,Xiangping Zhang
Metal-containing ionic liquids (MILs) have been considered as promising solvents for ethylene/ethane (C 2 H 4 /C 2 H 6 ) separation. With multiple 4f and 5d empty electronic orbitals, special electronic configuration and abundant electron energy levels, rare earth elements have potential to be great electron acceptor of C 2 H 4 . Herein, a new strategy of rare earth metal ionic liquids (REMILs), 1-butyl-3-methylimidazolium trifluoromethanesulfonate containing erbium ([Bmim][TFO]/Er(TFO) 3 ) in N, N-dimethylformamide (DMF) was exploited to separate C 2 H 4 /C 2 H 6 for the first time. The complexation between Er 3+ and C 2 H 4 and interactions in absorbents were adopted to achieve fast and selective C 2 H 4 absorption. The physical properties of the absorbents were measured and studied firstly. The addition of 20 wt% DMF in REMILs was optimized with a decrease in viscosity of 6–7 times at 293 K. The absorption parameters, such as Er 3+ concentration, temperature and regeneration of absorbents were also investigated systematically. The results showed that the selectivity of C 2 H 4 /C 2 H 6 was enhanced with increasing Er 3+ concentration. The solubility of C 2 H 4 in [Bmim][TFO]/Er(TFO) 3 + 20 wt% DMF was 0.95 mg/g with C 2 H 4 /C 2 H 6 selectivity of 10 (at 303 K, 0.1 MPa), much higher than that of conventional ILs. The interaction energy (ΔE) of Er 3+ -C 2 H 4 was more negative than Er 3+ -C 2 H 6 through density functional theory (DFT). Furthermore, the rare earth absorbents exhibited excellent reversibility after five cycles. In summary, this work provides a potential method for efficient separating C 2 H 4 /C 2 H 6 via REMILs in DMF solution.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2023
·
IF 9
Fa-Ping Liu,Ai-Rong Li,Cheng Wang,Yu-Ling Ma
The complex kinetic process of CO 2 hydrate formation limits its applications of CO 2 capture and sequestration et al. In this work, the effects of metal-based ionic liquids with different cations and anions on CO 2 hydrate nucleation and growth was studied. The results showed that CO 2 hydrate nucleation was promoted by the anions of [NiCl 3 ] - , [MnCl 3 ] - , [FeCl 4 ] - , [C 8 MIM] + and [C 16 MIM] + ions due to the enhancement of local hydrogen-bonding network to construct crystal nuclei. The induction time of CO 2 hydrate nucleation was decreased by 75.0% in the [C 16 MIM]FeCl 4 aqueous solution. However, CO 2 hydrate nucleation was inhibited by [C 2 MIM] + and [ZnCl 3 ] - anion. The gas storage capacity of CO 2 hydrate was increased by mass transfer channels around the metal complex anions which could accelerate the diffusion rate of H 2 O and CO 2 molecules. The co-effect between [C 16 MIM] + cations and [FeCl 4 ] - anions on CO 2 hydrate growth was the strongest, which increased gas storage capacity by 16.1%. Hence, CO 2 hydrate formation can be controlled and tuned by changing cations and anions of metal-based ionic liquids.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2019
·Vol. 14
·期 11
·2008-2017
·
IF 3.698
Cancan Wang,Qi Li,Jiangna Guo,Yongyuan Ren,Juewen Zhang,Feng Yan
Graphical Electrospun carbon nanofibers based on metal-containing ionic liquids are prepared to boost oxygen reduction reaction in Zn–air batteries. Practical applications of Zn–air batteries are usually limited by sluggish kinetics of oxygen reduction reaction. Replacing Pt-based catalysts with convenient, efficient and low-cost materials to boost oxygen reduction reaction is highly desirable. Herein, a class of Fe−N co-doped carbon nanofibers is successfully synthesized by pyrolysis of polyacrylonitrile/metal-containing ionic liquid-based electrospun films. The ionic liquids act as porogen to provide multiscale pores as well as activator to bring carbon nanofibers active sites. The catalyst possessing appropriate active sites and unique 3D porous architecture exhibits remarkable long-term stability and electrocatalytic activity. Particularly, the catalyst maintains a shape of membrane after carbonization, manifesting its direct use as air electrode without binders. It is notable that an all solid-state Zn–air battery based on the carbon nanofibers exhibits good flexibility, indicating its promising application as wearable devices.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Shaojuan Zeng,Junli Wang,Pengfei Li,Haifeng Dong,Hui Wang,Xiaochun Zhang,Xiangping Zhang
The emerging of ionic liquids (ILs) provides a promising way to efficiently separate ammonia (NH 3 ) and simultaneously recover NH 3 due to their negligible volatility, good affinity with NH 3 and designable structures. However, the relatively high viscosities of ILs and the limited gas-liquid interface severely affect gas diffusion in ILs, which hinders their practical use in industries. In this work, in order to overcome the mass-transfer limitations of ILs in gas separation, three metal ILs (MILs), [Bmim] 2 [CuCl 4 ], [Bmim] 2 [NiCl 4 ] and [Bmim] 2 [Co(NCS) 4 ], with good affinity toward NH 3 were incorporated into porous silica gels with large surface area and abundant hydroxyl groups, by an impregnation-vaporization method to form novel MIL@silica gel composites for rapid, efficient and reversible adsorption of NH 3 . The FT-IR and BET results indicated that the prepared adsorbents with different loadings of MILs are mesoporous composites. The [Bmim] 2 [Co(NCS) 4 ]@silica gel composites not only show much higher NH 3 capacity and NH 3 selectivity than pristine silica gel and faster adsorption rate than the corresponding pure MILs, but also exhibit excellent reversibility. The highest capacity of NH 3 adsorption up to 99.808 mg NH 3 ·(g adsorbent) −1 in 15 min was obtained when the loading of [Bmim] 2 [Co(NCS) 4 ] in the MIL@silica gel composite was 48.89 wt%, which could be attributed to the synergistic interaction of the complexation and hydrogen bonding between cobalt coordinated anion and NH 3 as well as mesoporous structures. Moreover, the NH 3 absorbed by the [Bmim] 2 [Co(SCN) 4 ]@silica gel can be completely released in 15 min, and no obvious losses in NH 3 capacity were detected during five adsorption and regeneration cycles, indicating great potentials as adsorbents for NH 3 separation applications.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2018
·Vol. 13
·期 8
·1029-1037
·
IF 3.692
Cancan Wang,Jiangna Guo,Dan Xu,Juewen Zhang,Muzi Chen,Feng Yan
Graphical Is this exciting ORR what ? Metal-containing ionic liquids are used as precursors to obtain porous metal-nitrogen-doped carbon materials without additional dopants and templates to improve the efficiency of the oxygen reduction reaction (ORR). This study describes a self-doping and additive-free strategy for the synthesis of metal-nitrogen-doped porous carbon materials (CMs) via carbonizing well-tailored precursors, metal-containing ionic liquids (M-ILs). The organic skeleton in M-ILs serves as both carbon and nitrogen sources, while metal ions acts as porogen and metallic dopants. A high nitrogen content, appropriate content of metallic species and hierarchical porosity synergistically endow the resultant CMs (MIBA-M-T) as effective electrocatalysts for the oxygen reduction reaction (ORR). MIBA-Fe-900 with a high specific surface area of 1567 m 2 g −1 exhibits an activity similar to that of Pt/C catalyst, a higher tolerance to methanol than Pt/C, and long-term durability. This work supplies a simple and convenient route for the preparation of metal-containing carbon electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Haiyue Wang,Liying Guo,Rongrong Zheng,Hongshuang Guo,Bing Fang,Jingyu Chai
The escalating global concern surrounding lithium battery electrolyte (LBE) arises from the substantial accumulation of discarded, hazardous, and valuable materials. While there has been extensive documentation on electrolyte recovery, research on harnessing the potential of solvent carbonates remains relatively sparse. To tackle this issue, we pioneered the development of three innovative metal anion-cation coordination ionic liquid catalysts. These catalysts were meticulously crafted to facilitate the synthesis of polycarbonate from spent LBE carbonate. Our approach involved intricate reactions between organic cations and inorganic anions with various metal compounds, resulting in synergistic catalytic effects. Comprehensive characterization unequivocally verified the intended chemical structure and thermal stability. Through systematic optimization of reaction conditions, our efforts yielded exceptional outcomes. The standout performer among the 1,3-(p-toluic acid Zinc Salt)Im ZnCl 3 achieved an impressive conversion rate and a robust yield. The catalyst demonstrated exceptional efficiency, selectivity, and degree of polymerization, offering auspicious avenues for future applications.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Keyi Huang,Chengqi Zhao,Zixuan Xu,Qing Zhao,Huiqin Xu,Xiaomin Zhang,leizhi zheng,You-Ting Wu
The efficient capture and conversion of hydrogen sulfide (H2S) represent a critical challenge in addressing key issues in energy and environmental fields. In this study, we innovatively designed and synthesized a series of carbonyl-functionalized metallic ionic liquids (CMILs), which exhibit dual functionality as both absorbents and catalysts under mild conditions. Experimental results demonstrate that the [Na-15C][LA] system delivers outstanding performance under ambient conditions (30 ℃, 1.0 bar), achieving an H 2 S absorption capacity of 1.73 mol/mol, H 2 S/CO 2 selectivity of 101.2, and an exceptionally high H 2 S/CH 4 selectivity of 1122.2. NMR, FT-IR, and DFT calculations confirm that the carbonyl group serves as the active site for efficient H 2 S capture.Notably, these CMILs function as highly effective catalysts, facilitating the solvent-free conversion 2 of H 2 S with α, β-unsaturated carboxylates into thiols and thioethers under mild conditions. Moreover, the system enables spontaneous phase separation between the catalyst and products without requiring additional components, achieving quantitative conversion (> 99%) while adhering to green chemistry principles. This integrated design provides a novel technical approach for the efficient capture and resource utilization of H2S.
✓ 已验证
产品关联
DOI
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.
研究领域:
能源存储
·
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）