Green Chemical Engineering
·
2022
·
IF 0
Lingling Peng,Mingzhen Shi,Xiaomin Zhang,Wenjie Xiong,Xingbang Hu,Zhuoheng Tu,Youting Wu
Selective separation of CO 2 and H 2 S from CH 4 is of importance to the natural gas upgrading because of its corrosivity. As is well known, amine group can recognize reversibly CO 2 and H 2 S with a moderate interaction. With this in mind, this work prepared a series of amine-functionalized supported-protic-ionic-liquid membranes (SPILMs) for the selective separation of CO 2 and H 2 S from CH 4 . For comparison, aprotic ionic liquid membrane was also prepared for natural gas sweetening. The effect of temperature and transmembrane pressure difference on the permeability of single gas and ideal selectivity of CO 2 /CH 4 and H 2 S/CO 2 were studied. Facilitated transport mechanism was studied by NMR spectra. The permeability of CO 2 in primary amine functionalized [DMPDAH][Tf 2 N]-based membrane decreases with the increasing transmembrane pressure, indicating a typical feature of facilitated transport membrane. The permeability of CO 2 and the ideal selective of CO 2 /CH 4 are as high as 2000 barrers and 53.2 at 313.2 K in [DMPDAH][Tf 2 N] membrane, significantly higher than those in conventional ILs membrane. It is anticipated that these amine-functionalized SPILMs can provide alternative insight for the selective separation of CO 2 and H 2 S from CH 4 .
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Jintao He,Junyuan Hua,Xiaohua Ma,Jianxin Li
The global high-tech industry is experiencing a consistent rise in the demand for cesium. Consequently, it is essential to establish a continuous and energy-efficient method for the recovery of Cs + from aqueous solutions. In this study, a novel supported ionic liquid membrane (SILM) was engineered by incorporating a crown ether-ionic liquid extraction system into the pores of a crown ether-based porous membrane, which was synthesized from 18-crown-6 ether-based polyimide (CE-PI) through non-solvent induced phase separation (NIPS). The findings indicate that the Cs + permeation rate in the SILM system containing free crown ether with a concentration of 0.12 mol/L achieved 3.36 μm/s, representing a 24-fold increase compared to that of the SILM system without free crown ether. When the feed phase comprised mixed ions (K + /Cs + /Rb + ) at a concentration of 50 ppm each, and 0.5 mol/L HCl was used as a stripping phase, the Cs + permeation flux of the SILM system reached 0.233 μg m −2 s −1 , which is substantially greater than that of the competing ions K + (0.001 μg m −2 s −1 ) and Rb + (0.005 μg m −2 s −1 ). The corresponding separation factors (SF) for Cs/K and Cs/Rb in the SILM system were determined to be 10.10 and 7.44, respectively. The high performance of the SILM system is attributed to the ion transport channels established by the free crown ether and ionic liquid within the membrane pores. DFT calculations and MD simulations demonstrated that the free crown ethers in the ionic liquid are instrumental in selectively complexing Cs + owning to their unique chelation interaction (E Cs = −288.5 kJ/mol), thereby promoting the transport of Cs + within the SILM system.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Yongli Sun,Hanrong Bi,Haozhen Dou,Huawei Yang,Zhaohe Huang,Baoyu Wang,Rong Deng,Luhong Zhang
For the separation of an ethylene/ethane mixture, a novel copper(I)-based supported ionic liquid membrane (SILM) with high permeability has been fabricated. This SILM was prepared from a polyvinylidene fluoride microporous membrane impregnating the copper(I) based IL which formed by the cuprous chloride (CuCl) and 1-butyl-3-methylimidazolium chloride ([Bmim][Cl]). Scanning electron microscopy, attenuated total reflection Fourier transform infrared spectroscopy, and time of flight mass spectroscopy were used to characterize the SILM. Pure and mixed gas permeation experiments were carried out to investigate the influences of ILs composition, trans-membrane pressure, temperature, and time upon the separation performance. This SILM showed comparable C2H4 permselectivity but outstanding permeability with a long-term stability beyond the reported polymeric membrane upper bound. At the CuCl/[Bmim][Cl] ratio of 2, the C2H4 permeability and permselectivity reached 2653 barrer and 11.8, respectively. Furthermore, the facilitated transport effect was studied by 1H NMR and quantum mechanical calculations. The anionic species formed by sp hybridization of Cu+ possesses unfilled attachment sites to selectively complex with C2H4 and weaken the interionic hydrogen bond of [Bmim][Cl], thus lowering the system’s viscosity.
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
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Qianqian Shang,Hang Mei,Xinrui Feng,Chuixiu Huang,Stig Pedersen-Bjergaard,Xiantao Shen
Electromembrane extraction (EME), involving the migration of charged analytes across a supported liquid membrane (SLM) with an external power supply, is a promising sample preparation method in analytical chemistry . However, the presence of boundary double layers at the SLM/solution interfaces often restricts extraction efficiency. To avoid this, the current work proposed an ultrasound-assisted EME (UA-EME) method based on a novel type of supported semi-liquid membrane (SsLM). The characterizations showed that the SsLM was stable under ultrasound conditions. Ultrasound was found to reduce the boundary double layers and thus increase the mass transfer. Major operational parameters in UA-EME including ultrasound power density, temperature, applied voltage and extraction time were optimized with haloperidol , fluoxetine , and sertraline as model analytes. Under the optimal conditions, extraction recoveries of model analytes in water samples were in the range of 66.8%–91.6%. When this UA-EME method was coupled with LC-MS/MS for detection of the target analytes in human urine samples, the linear range of the analytical method was 10–1000 ng mL −1 , with R 2 > 0.997 for all analytes. The limits of detection (LOD) and limits of quantification (LOQ) were in the range of 1.7–2.1 ng mL −1 and 5.7–6.7 ng mL −1 , respectively. The UA-EME expands the application field of ultrasound chemistry and will be very important in development of stable and fast sample preparation systems in the future.
研究领域:
分析化学
·
超声化学
·
药物分析
✓ 已验证
DOI
高影响因子
Small
·
2025
·
IF 12.1
Yu-Ren Xue,Guang-Chang Xu,Kai Li,Xin-Yu Guo,Jian Wu,Hong-Qing Liang,Hao-Cheng Yang,Chao Zhang,Zhi-Kang Xu
The growing demand for energy-efficient carbon capture has spurred significant advancements in supported ionic liquid membranes (SILMs), which utilize ionic liquid (IL) with high CO 2 solubility for continuous gas purification processes. However, conventional SILMs are hindered by a persistent limitation: thick IL layers (> 50 µm) significantly reduce CO 2 permeance to below 1 GPU, while also causing mechanical failure under prolonged operational pressure. Inspired by the interlocking elytra of Tenebrionidae beetles, which use microscale “teeth” to withstand mechanical stress, locked ionic liquid membranes (LILMs) are engineered by composeing two interpenetrating polyamide nanofilms with biomimetic protrusions. These nanofilms confine ILs within cavities formed by protrusions, thinning IL layers to sub-0.5 µm while resisting shear stresses. The LILMs demonstrate a CO 2 /N 2 selectivity of 55 and an enhanced CO 2 permeance of 8.2 GPU, surpassing the performance of conventional SILMs by ≈20-fold while maintaining stability over 168 h of continuous mixed gas separation. By dual-purposing ILs as both solvents for interfacial polymerization and CO 2 transporters, this bio-inspired architecture overcomes the thickness-stability limitations, enabling energy-efficient carbon capture.
研究领域:
材料科学
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环境科学
·
仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 9
·3526-3535
·
IF 2.5
Shuang Meng,Yan Zhuang,Xue Yang,Dongxuan Guo,Jinlong Li
Volatile organic compounds (VOCs) emitted from industrial activities and transportation pose significant health risks to humans and contribute to environmental issues. As a result, there has been growing interest in developing effective technologies for VOC removal. This study investigates the removal of low-concentration VOCs from air using a membrane catalytic process that combines a supported ionic liquid membrane (SILM) with a novel visible light-driven photocatalyst. The system, consisting of a 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF6) SILM and N-doped La–TiO2 photocatalysts, achieves a mineralization rate of 40%–60% and a removal efficiency of approximately 75% for VOCs under visible light exposure for 10 hours. The synergistic effects of membrane separation and photocatalytic degradation significantly enhance the overall VOC removal efficiency compared to using either method alone. The membrane catalytic system demonstrates particular applicability and stability for various organic compounds, including toluene, acetone, chloroform, benzene, and xylene. Overall, this work presents a promising approach for the removal and mineralization of VOCs.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Haozhen Dou,Bin Jiang,Xiaoming Xiao,Mi Xu,Baoyu Wang,Li Hao,Yongli Sun,Luhong Zhang
Facilitated transport membranes (FTMs) for olefin/paraffin separations have failed to achieve commercial success due to the instability of carriers although great efforts have been made. In this work, ultra-stable and cost-efficient protic ionic liquid based FTMs (PIL-FTMs) were firstly prepared by utilizing the Brönsted acidic property of PILs to stabilize the carrier. The gas solubility in the carrier/PILs was measured and the separation performances of PIL-FTMs were evaluated systemically. The results indicated that the structure of PILs affected the C 2 H 4 permeability and the presence of ether group and hydroxyl group in PILs significantly enhanced the C 2 H 4 /C 2 H 6 selectivity. The carrier concentration led to structural variation of PIL-FTMs, thus manipulating the gas separation performances of PIL-FTMs. The increase of transmembrane pressure decreased C 2 H 4 permeability and C 2 H 4 /C 2 H 6 selectivity, indicating a typical feature of FTMs. The increase of temperature increased the C 2 H 4 permeability but decreased C 2 H 4 /C 2 H 6 selectivity. The separation performances of PIL-FTMs were much higher than other results in the literature. Furthermore, the PIL-FTMs exhibited excellent stability during the long-term experiments carried out for six months. Finally, the investigation of separation mechanism revealed that the hydrogen-bonding and coordinative interactions between PILs and carrier accounted for the high separation efficiency of PIL-FTMs. In all, the excellent long-term stability, outstanding separation performances and economic feasibility of PIL-FTMs could play an important role in moving these membranes toward industrial application.
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
JOURNAL OF MOLECULAR STRUCTURE
·
2021
·
IF 3.196
Jinlong Li,Boxin Li,Guozhe Sui,Lijuan Du,Yan Zhuang,Yulin Zhang,Yuanfang Zou
Volatile organic compounds (VOCs) with toxicity properties discharged from industrial emissions and combustion engines threaten human health and cause environmental problems. Therefore, it is important to develop technologies to remove VOCs from air. In this study, the performance of Nd (neodymium) -TiO 2 nanoparticles embedded in a supported ionic liquid membrane (SILM) for removal of VOCs from air was investigated. Aiming at functionalizing the ionic liquid membrane with photocatalytic capability, we developed a facile and effective approach for the removal of VOCs by coupling highly efficient photocatalysts with the SILM. Nd-TiO 2 nanoparticles , which are ultraviolet-visible (UV–Vis) light-driven photocatalysts, were prepared by sol-gel and immersed in the SILM for use as a photocatalytic membrane-based reactor. The gaseous VOCs tested were toluene, acetone, chloroform, benzene, and xylene. We confirmed that at a loading of 50 wt% Nd-TiO 2 nanoparticles (1 wt% Nd content) and 1-hexyl-3-methylimidazolium hexafluorophosphate ([HMI m ]PF 6 ) as SILM ([HMI m ]PF 6 /Nd-TiO 2 SILM), the as-prepared photocatalytic membrane-based reactor exhibited higher removal efficiency of VOCs from air (60~80% removal after 10 h) under UV–Vis light illumination than individual SILM or photocatalytic systems. Effluent gas analysis revealed that 25–55% of VOCs was decomposed and mineralized in the photocatalytic membrane reactor, which exhibited higher VOCs removal efficiency than membrane separation. These results indicate that the photocatalytic membrane-based reactor containing Nd-TiO 2 nanoparticles and SILM designed in this study is highly active and stable. This study on [HMIm]PF 6 /Nd-TiO 2 SILM was initiated to couple membrane separation with photocatalytic degradation of gaseous VOCs and can serve as a promising way for eliminating harmful VOCs with low concentration from air.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2014
·
IF 4.258
Mei-Qiang Cai,Xiao-Qing Wei,Chun-Hui Du,Xu-Ming Ma,Mi-Cong Jin
A novel amphiphilic polymeric ionic liquid membrane containing a hydrophilic bromide anion and a hydrophobic carbonyl group was synthesized in dimethylformamide (DMF) systems using the ionic liquid 1-butyl-3-vinylimidazolium bromide (BVImBr) and the methylmethacrylate (MMA) as monomers. The prepared amphiphilic ploy-methylmethacrylate-1-butyl-3-vinylimidazolium bromide (MMA-BVImBr) was characterized by a scanning electron microscope and an infrared spectrum instrument. The results of solid-phase micro-extraction membrane (SPMM) experiments showed that the adsorption capacity of membrane was about 0.76 μg μg −1 for aniline. Based on this, a sensitive method for the determination of trace aniline, as a degradation product of azo dye Orange G under sonication, was developed by liquid chromatography–tandem mass spectrometry (LC–MS/MS). The calibration curve showed a good linearity ranging from 0.5 to 10.0 μg L −1 with a correlation coefficient value of 0.9998. The limit of quantification was 0.5 μg L −1 . The recoveries ranged from 90.6% to 96.1%. The intra- and inter-day relative standard deviations were less than 8.3% and 10.9%. The developed SPMM-LC–MS/MS method was used successfully for preconcentration of trace aniline produced during the sonication of Orange G solution.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhengda Lin,Yijun Liu,Zhongming Zhang,Jie Yao
In this study we used a high-temperature steam-induced hydrolysis method to obtain a fluorinated OH/SiO 2 -TiO 2 /polyethersulfone (PES) composite hollow fiber membrane for CO 2 capture. The purpose of grafting SiO 2 and TiO 2 on the surface of PES by hydrolyzing silicon precursors and titanium precursors at high temperature, is to improve the alkali corrosion resistance and hydrophobicity of the PES membrane. The OH/SiO 2 -TiO 2 /PES composite hollow fiber membranes prepared by the high-temperature steam-induced hydrolysis method and the graft coating method were measured by SEM, EDS , FTIR, WCA, AFM , XRD and XPS in order to characterize the morphology and structure of the prepared membranes. In the CO 2 /CH 4 separation performance test experiment, the OH/SiO 2 -TiO 2 /PES membrane prepared by the high-temperature steam hydrolysis method showed better separation performance than the original PES membrane. The effects of absorbent flow rate, absorbent concentration and feed gas flow rate on CO 2 flux and CO 2 /CH 4 were selectivity investigated. When the flow rate of the absorbent (DEA) reached 16 L/h, the flow rate of the feed gas (CO 2 /CH 4 = 40 : 60) was 30 ml/min, the concentration of the absorbent was 1 mol/L, The CH 4 concentration was 99.88 % and the optimal separation factor was as high as 554.89. In general, the results obtained in this work may provide promising insights into the use of fluorinated OH/SiO 2 -TiO 2 /PES composite membranes for carbon capture and CO 2 /CH 4 separation in GLMC application.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 29
·2310092
·
IF 13
Yu-Ren Xue,Chang Liu,Hao-Cheng Yang,Hong-Qing Liang,Chao Zhang,Zhi-Kang Xu
Supported ionic liquid membranes (SILMs), owing to their capacities in harnessing physicochemical properties of ionic liquid for exceptional CO 2 solubility, have emerged as a promising platform for CO 2 extraction. Despite great achievements, existing SILMs suffer from poor structural and performance stability under high-pressure or long-term operations, significantly limiting their applications. Herein, a one-step and in situ interfacial polymerization strategy is proposed to elaborate a thin, mechanically-robust, and highly-permeable polyamide armor on the SILMs to effectively protect ionic liquid within porous supports, allowing for intensifying the overall stability of SILMs without compromising CO 2 separation performance. The armored SILMs have a profound increase of breakthrough pressure by 105% compared to conventional counterparts without armor, and display high and stable operating pressure exceeding that of most SILMs previously reported. It is further demonstrated that the armored SILMs exhibit ultrahigh ideal CO 2 /N 2 selectivity of about 200 and excellent CO 2 permeation of 78 barrers upon over 150 h operation, as opposed to the full failure of CO 2 separation performance within 36 h using conventional SILMs. The design concept of armor provides a flexible and additional dimension in developing high-performance and durable SILMs, pushing the practical application of ionic liquids in separation processes.
研究领域:
膜科学与技术
·
气体分离
·
环境化学
·
材料化学
·
化学工程
·
可持续能源技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2019
·Vol. 10
·期 1
·1-10
·
IF 11.878
Nie Jinhui,Wang Ziming,Ren Zewei,Li Shuyao,Chen Xiangyu,Lin Wang Zhong
Triboelectric nanogenerators are an energy harvesting technology that relies on the coupling effects of contact electrification and electrostatic induction between two solids or a liquid and a solid. Here, we present a triboelectric nanogenerator that can work based on the interaction between two pure liquids. A liquid–liquid triboelectric nanogenerator is achieved by passing a liquid droplet through a freely suspended liquid membrane. We investigate two kinds of liquid membranes: a grounded membrane and a pre-charged membrane. The falling of a droplet (about 40 μL) can generate a peak power of 137.4 nW by passing through a pre-charged membrane. Moreover, this membrane electrode can also remove and collect electrostatic charges from solid objects, indicating a permeable sensor or charge filter for electronic applications. The liquid–liquid triboelectric nanogenerator can harvest mechanical energy without changing the object motion and it can work for many targets, including raindrops, irrigation currents, microfluidics, and tiny particles.
研究领域:
纳米技术
·
能源工程
·
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）