Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Zeyu Geng,Qin Xie,Zhongjiao Fan,Weining Sun,Wei Zhao,Junhao Zhang,Jianqiu Chen,Yun Xu
Four tertiary amine-based protic ionic liquids (PILs) have been carefully designed to investigate the performance of SO 2 uptake. Their physical properties of densities and viscosities were determined. In the four PILs, the highest capacity for SO 2 of the four PILs reached up to 5.64 mol/kg ILs (P = 1.0 bar, T = 313.2 K). The ideal selectivity of SO 2 /CO 2 was up to 250 in the separation application of SO 2 from CO 2 . The kinetic study demonstrated that the PILs could efficiently capture SO 2 quickly under the ambient pressure. Based on the SO 2 absorption capacity and selectivity, excellent recyclability , and fast absorption process, the PILs in this work are considered as a potential alternative to traditional absorbents in the flue gas desulfurization (FGD).
研究领域:
化学工程
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环境科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Lixin Xia,Chunfang Zhao,Qian Zhang,Yaxian Chen,Meiqi Bao,Xiaoyan Ma,Ling Zhang,Zhiqiang Xing,Huiting Wang
An exceptionally stable biosensor for pesticide monitoring was engineered through the assembly of a multilayered core-shell nanostructure incorporating polymeric ionic liquid (PIL)-encased acetylcholinesterase (AChE). In this design, AChE is encapsulated within PILs to form the inner core, PILs serve as the intermediate layer, and silver nanoparticles (Ag NPs) are uniformly assembled on the outer layer to provide surface enhancement effects. The PILs microspheres provide a biocompatible microenvironment to stabilize AChE activity while enabling tunable charge density and ordered structural frameworks to guide the uniform assembly of Ag NPs into nanoscale arrays. This precise arrangement of Ag NPs amplifies localized electromagnetic coupling, significantly enhancing surface-enhanced Raman scattering (SERS) signals. The composite was further modified with 2-(pyridyldithio)ethylamine (PDEA), which functions as a SERS reporter through its pyridine ring vibrations. The detection mechanism involves two critical steps: (1) AChE hydrolyzes acetylthiocholine (ATCl) to generate thiocholine (TCl), which cleaves PDEA's disulfide bonds, releasing pyridine rings and attenuating SERS signals; (2) Organophosphate pesticides inhibit AChE activity, thereby reducing TCl production and preserving PDEA's signal intensity for indirect quantification. Owing to the synergistic integration of hierarchical stability, electromagnetic enhancement, and molecular recognition capabilities, the multilayer core-shell structure (denoted as AChE@PILs@Ag NPs-PDEA) achieves ultrasensitive detection across a wide linear range from 3.8 × 10 −7 to 3.8 × 10 −12 M, reaching an exceptional detection limit of 1.38 × 10 −13 M. The biosensor demonstrates robust thermal stability, long-term storage reliability, and reliable matrix interference resistance in food/environmental matrices (tomato homogenates, tap water), validating its practicality for on-site pesticide monitoring in agricultural products under variable environmental conditions.
研究领域:
分析化学
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生物传感器
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纳米技术
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环境监测
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食品安全
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酶学
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表面增强拉曼光谱
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yuxin Yuan,Quanlan Liao,Tianxiang Zhao
Metal-organic frameworks (MOFs) have been hybridized with other functional materials, such as ionic liquids, covalent organic frameworks (COFs), and metallic nanoclusters, to fabricate composite materials. These composites possess the structural characteristics of their individual components and exhibit synergistic properties. In this work, we demonstrate the synthesis of core-shell structure UiO-66-NH 2 @PILs-x composite materials by encapsulating MOFs within ionic polymers (PILs) with varying thicknesses of PILs shell. These hybrid materials serve as bifunctional catalysts for the conversion of CO 2 into cyclic carbonates under solvent- and additive-free conditions through a synergistic catalytic effect facilitating the conversion of CO 2 into cyclic carbonates under solvent- and additive-free conditions through synergistic catalytic effect, exhibiting superior catalytic performance and excellent recyclability. This MOFs-based composite material provides a competitive approach for CO 2 catalytic conversion.
研究领域:
材料科学
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催化化学
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高影响因子
RSC Advances
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2021
·Vol. 11
·期 14
·8255-8263
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IF 3.361
Jun Wu,Wei Liu,Rui Zhu,Xiashi Zhu
A special self-designed device based on poly-1-vinyl-3-pentylimidazole hexafluorophosphate (PILs-C5) solid-phase extraction and high performance liquid chromatography (HPLC) is proposed as a novel method for the on-line separation and analysis of Rhodamine B (RhB) dye. Single factor experiment design and orthogonal experiment design were used to optimize the experimental parameters, such as pH, the amount of PILs-C5, sample volume, flow rate, eluent type, eluent concentration, eluent volume, and the flow rate of eluent. Under the optimized conditions, the linear range was 0.02–2.4 μg mL−1, with the correlation coefficients (R2) of 0.997. The limit of detection (LOD) and limit of quantification (LOQ) were 0.004 μg mL−1 and 0.02 μg mL−1, respectively. The extraction capacity was 6.22 mg g−1, and enrichment ratio was 15. The extraction mechanism and the post-treatment method of PILs-C5 were also studied. This method was applied to analyze RhB in a wide variety of real samples with satisfactory results.
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
Molecular Catalysis
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2026
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IF 4.3
Zhendong Pan,Ying Liu,Yong Li,Yifan Liu,Zifeng Yang
PILs@ZnOx nanocatalyst was constructed via in-situ self-assembly of pyrrolium-based PILs and ZnO, featuring tailored oxygen vacancies for potentially relieving the entrainment phenomenon of reactive distillation, dual alkaline sites and unique interfacial microenvironment to facilitate transesterification. • The catalyst exhibited outstanding activity and good stability for room-temperature synthesis of DMC from CO 2 -derived cyclic carbonate, far superior to metal oxide catalyst. • Multiple characterizations combined with in-situ spectroscopy elucidated the synergistic catalysis of dual basic active sites at the catalyst interface. Pyrrolium-based polymeric ionic liquids-functionalized ZnO nanocatalysts (PILs@ZnO) with an oxygen-vacancy-enriched interface were fabricated via in-situ oxidative polymerization to resolve the entrainment phenomenon in reactive distillation process of producing DMC. The unique interfacial microenvironment effectively modulates the electronic structures and enhances the synergistic catalysis, which could lower the reaction temperature of transesterification between ethylene carbonate and dimethyl carbonate to ambient conditions, and performed the results of EC conversion with 86.7% and DMC selectivity with over than 99.0%. Physicochemical characterizations including FTIR, XRD, XPS and HRTEM were combined with in-situ FTIR and NMR to reveal the structure-activity relationship and further proposed its probably real-time catalytic process. At room temperature, the designed PILs@ZnO x catalyst behaved multiple functional active sites, including strongly basic OH - , pyrrolium-N + cations and Lewis-basic ZnO nanoparticles with a newly constructed oxygen-vacancy microelectronic interface to potentially relieve the entrainment phenomenon in reactive distillation process of producing DMC. Benefiting from the synergistic effect of these multifunctional moieties, PILs@ZnO x exhibits outstanding catalytic performance for the synthesis of DMC from cyclic carbonate. Its catalytic activity is far superior to the pristine ZnO, pure PPY + OH - , and other corresponding PILs-supported metal oxide (PPY + OH - @MgO, PPY + OH - @Al 2 O 3 , PPY + OH - @CaO and PPY + OH - @ZrO 2 ). Download: Download high-res image (327KB) Download: Download full-size image
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DOI
高影响因子
Micro & Nano Letters
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2019
·Vol. 14
·期 13
·1287-1292
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IF 0.975
Feng Wang,Jie Li,Long Xu,Feng Jiang,Jianfeng Zhang
In this work, the study of synthesis and denitrogenation of magnetic polymeric ionic liquids (PILs) for N-compounds in simulated oils and diesel are reported. Three functionalised magnetic particles, Fe 3 O 4 @SiO 2 @PILs with side alkyl chain of C2, C4 and C6, respectively, were prepared by grafting PILs on the surface of silica-coated Fe 3 O 4 . Fourier transform infrared spectra, thermogravimetric analysis, X-ray diffraction and scanning electron microscopy were carried out to characterise the structure of Fe 3 O 4 @SiO 2 @PILs. It has shown that Fe 3 O 4 @SiO 2 @ PILs possess precious merits for sorbents, such as regular morphology, good stability and magnetic properties. Denitrogenation experiments of simulated oils demonstrate that Fe 3 O 4 @SiO 2 @ PILs show better denitrogenation efficiency of basic N-compounds than neutral N-compounds. The effects of temperature, reaction times, ratio of reagent to oil on denitrogenation for simulated oils were explored, and 92.1% denitrogenation efficiency was obtained to remove quinoline from simulated oils. Denitrogenation of Fe 3 O 4 @SiO 2 @PILs in diesel leads to 84.3% denitrogenation efficiency, and it can remain 82.5% denitrogenation efficiency after five times of recycles. Compared with other similar sorbents, Fe 3 O 4 @SiO 2 @PILs show competitive performances to eliminate organic N-compounds. It is hopeful that Fe 3 O 4 @SiO 2 @PILs can be promising sorbents for purification of liquid fuel by adsorptive denitrogenation.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2021
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IF 3.171
Xiaocheng Lin,Youjie Huang,Ling Li,Changshen Ye,Jie Chen,Ting Qiu
A series of polymeric ionic liquids (PILs) used as effective heterogeneous catalysts for biodiesel production via esterification of free fatty acids (FFAs) were effectively prepared by the reaction of poly (ethylene imine) (PEI) polymers with different molecular weight and 1,3-propanesultone, followed by the further acidification with differential effective acids, i.e. H 2 SO 4 , CF 3 SO 3 H, CH 3 SO 3 H or p -toluenesulfonic acid ( p -TSA). Ultrahigh acidity and catalytic performance were achieved and could be fine-tuned by simply adjusting the molecular weight of PEI and by further treatment of acids. Specifically, under the optimal conditions ( i.e. reaction temperature was 70 °C, reaction time was 2.0 h, catalyst dosage was 3.15% (mass), and alcohol/acid molar ratio was 14:1) acquired through the Box-BEHNKEN response surface methodology, a high oleic acid conversion of 98.42% could be obtained over the optimal PIL, PEI(70000)-PS- p -TSA. Additionally, our PILs also showed high generality for esterification of other FFAs, with general high conversion over 90% noted in each case even under much milder reaction conditions compared to other conventional catalysts.
研究领域:
化学工程
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可再生能源
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
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IF 6.76
Jiarong Li,Chang Li,Lilong Yang,Zhe Liu,Ruimin Gao,Jianshe Zhao
In order to obtain the clean fuel, two types of inorganic–organic hybrid catalysts with core–shell structures have been prepared as efficient and reusable catalysts for oxidative desulfurization, in which ionic liquids (1-vinylimidazole and 4-vinylpyridine) were grafted and polymerized on the surface of silicon through free radical polymerization and polyoxometalates (H 3 PMo 6 W 6 O 40 , attributed as PMoW) was functionalized on the surface of silicon. The as-prepared catalysts were characterized by FT-IR, UV–Vis, N 2 adsorption–desorption, SEM and TEM. It could be proved that these two types of catalysts show high sulfur removal efficiency over 98% in the model fuel with 2000 ppm of DBT under mild reaction condition. The effective catalytic abilities of synthesized catalysts are mainly attributed to the hierarchical functional core–shell structures. The successful preparation of the PILs-polyoxometalates based catalysts with high catalytic activities could provide the demonstration of the application of polymer in oxidative desulfurization.
研究领域:
材料科学
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环境化学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2023
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IF 6
Ding Jiang,Yuting He,Jinrui Zhang,Jie Yin,Jing Ding,Shuang Wang,Hongping Li
Conjugate acid-base bi-functional PILs (CAB-PILs) with carboxylate and carboxyl branches were synthesized and used as catalysts for the cycloaddition reaction of glycidol with CO 2 . Two functional ionic monomers, 3-(carboxymethyl)-1-vinyl-1H-imidazol-3-ium chloride (CEImCl) and 2-(1-vinyl-1H-imidazol-3-ium-3-yl) acetate (CCIm), were introduced into the CAB-PILs skeleton. In this case, we proved the excellent characteristics of the catalyst containing both Lewis base and Bronsted acid sites for converting CO 2 to cyclic carbonate under mild conditions. The catalyst showed good reusability and remained excellent activity after five reaction cycles. Combined with XPS, FTIR and DFT calculations, it is proved that the CCIm ionic monomer not only play the role of CO 2 absorption center, but also has synergistic effect with CEImCl in CAB-PILs to promote cycloaddition reaction.
研究领域:
化学工程
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催化材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Bin Jiang,Tong Lei,Weida Chen,Meisi Chen,Chen Lu,Feng Zhang,Zhibing Zhang
Due to the proton transfer between aqueous solution of protic ionic liquids (PILs) and N,N,N’,N’-tetramethyl-1,6-hexanediamine (TMHDA), the liquid–liquid phases are gradually transformed into one phase during the absorption which is restored to two phases by carbon dioxide desorption, thus both the absorption and desorption processes were effectively intensified by phase conversion. The experimental results showed that CO 2 load of TPH (composed of TMHDA, PILs and H 2 O) was 45% higher than that of PILs-H 2 O, as well as an obvious increase of absorption rate. Moreover, the regeneration energy consumption of TPH was only 2.10 GJ/tonCO 2 . The spectral analysis and molecular dynamics simulations revealed that the proton transfer was the key of phased conversion, and it was regulated by the synergistic interaction between PILs and TMHDA during the CO 2 capture process. This kind of phase conversion strengthening absorbent with low viscosity is a useful way to achieve low energy carbon dioxide capture.
研究领域:
化学工程
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环境科学
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材料科学
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DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
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2016
·Vol. 35
·期 1
·54-65
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IF 1.811
Chen Qi-jing,An Ze-sheng
A series of well-defined core cross-linked star (CCS) polymeric ionic liquids (PILs) were synthesized via a three-step approach. First, the styrenic imidazole-based CCS polymer (S-PVBnIm) was prepared by the RAFT-mediated heterogeneous polymerization in a water/ethanol solution, followed by the quaternization of S-PVBnIm with bromoalkanes and anion exchange. The CCS polymers were characterized by gel permeation chromatography (GPC), nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC). The obtained CCS polymers were used as the effective emulsifiers for oil-in-water high internal phase emulsions (HIPEs). Multiple oils with different polarity including n -dodecane, undecanol, toluene and octanol were emulsified using 0.5 wt% S-PVBnIm aqueous solution under the acidic condition to form HIPEs with long-term stabilities. The excellent emulsification properties of CCS PILs were demonstrated by HIPE formation for a variety of oils. The properties of HIPEs in terms of emulsion type and oil droplet size were characterized by the confocal laser scanning microscopy (CLSM). The intriguing capability of CCS PILs to stabilize HIPEs of various oils holds great potentials for the practical applications.
研究领域:
聚合物化学
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材料科学
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胶体与表面化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）