Asia-Pacific Journal of Chemical Engineering
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2025
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IF 1.6
Xueqiang Shao,Changyu Fu,Yujing Zhang,Jinyi Chen,Jinbei Yang,Zhongliang Yao
A novel self-solidifying polymeric ionic liquid (P-[DMT-PS][PHSA]) was synthesized via phenolic condensation and applied as a recyclable acidic catalyst for biodiesel production. The catalyst demonstrated high acidity (4.68 mmol/g), excellent thermal stability, and effective catalytic performance, achieving 98.19% oleic acid conversion under optimized conditions. Notably, P-[DMT-PS][PHSA] is soluble during the esterification, allowing it to act as a homogeneous catalyst, and re-precipitates upon methanol evaporation for easy recovery. Even after 10 cycles, the catalyst maintained 97.0% oleic acid conversion, highlighting its stability and reusability. Additionally, P-[DMT-PS][PHSA] exhibits remarkable substrate adaptability, effectively catalyzing the esterification of a range of substrates. This study presents a simple and mild synthesis method for polymeric ionic liquids and showcases P-[DMT-PS][PHSA] as a promising alternative to conventional catalysts for biodiesel production.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ao Men,Liangliang Xiong,Cong Cai,Xiaoqiang Fan,Minhao Zhu
A double-walled microcapsule was fabricated by integrating Ti 3 C 2 T x onto polysulfone through electrostatic self-assembly, effectively overcoming the limitations of conventional single-walled microcapsules, such as inadequate thermal stability, premature release and susceptibility to breakage. By incorporating Ti 3 C 2 T x @PSF microcapsule loaded with ionic liquid (IL) into the coating, a self-lubricating and self-repairing anti-wear and corrosion resistance epoxy coating was developed and evaluated. The coating exhibited an 83.24 % reduction in wear rate, attributed to the uniform lubricating films formed by the released IL and the broken Ti 3 C 2 T x microcapsule. Additionally, the enhanced thermal stability of the double-walled structure helps to prevent the uncontrolled loss of the ionic liquid. For corrosion resistance, the coating containing 10 wt% Ti 3 C 2 T x @PSF@IL demonstrated the ability to withstand up to 40 days of salt spray exposure before notable corrosion occurred. This noticeable performance is attributed to the enhanced interface between the microcapsules and resin, the extended diffusion path created by Ti 3 C 2 T x , and the adsorption effect of IL. Herein, this Ti 3 C 2 T x @PSF double-walled microcapsule loaded IL provides an effective solution for high-performance anticorrosive and wear-resistant epoxy coatings in harsh environments.
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TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Lisha Liu,Longxia Wang,Shifan Sun,Yujuan Zhang,Chunli Zhang,Shengmao Zhang
The designed synthesis of ionic liquid-type organic molybdenum (IOMo) compounds was investigated for their tribological performance as additives in alkylated naphthalene base oil, and their performance was compared with commercial additives. When IOMo is combined with ZDDP as additive, they synergistically enhance its anti-friction properties and further improve its anti-wear performance effectively. By analyzing worn surface, coupled with the adsorption performance of the additive, the "adsorption-reaction-film formation" lubrication mechanism is proposed. IOMo forms strongly adsorbed ultra-thick adsorption film on the friction pair surface through electrostatic adsorption, effectively avoiding the running-in wear stage. During the friction process, frictional chemical reactions facilitate the formation of a complex boundary lubrication film, thereby demonstrating excellent anti-friction and anti-wear capabilities across the entire lubrication range.
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MICROCHEMICAL JOURNAL
·
2025
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IF 5.1
Xiutan Peng,Yuqing Xu,Weiye Zhou,Yiting Tao,Haiyan Fu,Siying Che,Yuanbin She
Evaluation of glyphosate content in tea products is a food safety topic worthy of social attention due to most glyphosate is dissolved in water as well during tea brewing. So it requires that the probe can not only realize the sensitive detection of glyphosate, but also has good water solubility to realize the practical detection of glyphosate in water-based samples such as tea infusions. To better suit the demands of practical applications, a water-soluble quinoline fluorescent ionic liquid probe (EHQCA) was synthesized for the sensitive detection of glyphosate by fluorescence “turn-off-on”. Interestingly, the introduction of the imidazolium cation module easily achieved the switchable water solubility of the fluorophore without complex group modification. According to the different competitive coordination ability, EHQCA-Cu 2+ with fluorescence-off was first constructed, and then Cu 2+ was captured by glyphosate to restore fluorescence. The probe behaved a sensitive (detection limit of 2.2 × 10 −8 M), rapid (less than 5 s) and selective response (among 20 interferences) to glyphosate. Meaningfully, satisfactory recovery (98–103 %) and low RSD (< 1.27 %) were obtained in 12 green tea infusions from different varieties and origins. Therefore, the ionic liquid-based fluorescent probes offers strong technical support for the detection of pesticides in foods such as tea, and have broad prospects in the field of food safety monitoring and evaluation.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shuting Zhang,Jianwen Wei,Xuequan Zou,Linlin Geng,Xiaobin Zhou
This work demonstrates a strategic fabrication of high-performance CO 2 adsorbents by impregnating three conventional ionic liquids (ILs: [BMIM][NTf 2 ], [EMIM][NTf 2 ] or [EMIM][SCN]) with a covalent organic framework (COF) for carbon dioxide (CO 2 ) capture under simulated flue gas streams (1 bar, 15 vol% CO 2 , 60 ℃). Through the systematical assessment of the effects of IL structural features (different anions and cations), adding ratios (15–95 wt%), and operational temperatures (30–90 °C), it was shown that the adsorbent modified by [EMIM][SCN] in an appropriate amount (35 wt%) achieves the remarkable CO 2 adsorption capacity (5.273 mmol·g −1 at 60 ℃), representing a 3.7-fold enhancement compared to the original COF (1.419 mmol·g −1 ) due to its optimal combination of small molecular weight, short alkyl chain cation, and high CO 2 affinity anion. FTIR analysis revealed the potential adsorption mechanisms: the amine of COF chemisorbs CO 2 through carbamate formation, while the ILs enhance both chemisorption and physisorption of CO 2 via the thiocyanate nucleophilicity, the [NTf 2 ] - electronic redistribution, and hydrogen bonding of imidazolium, which is dominated by anion. The optimum CO 2 adsorption temperature (45–60 ℃) matches post-desulfurization flue gas conditions in coal-fired plants. With excellent performance and robust stability, these innovative adsorbents show practical potential for CO 2 capture in real post-combustion flue gas scenarios.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Qianqian Peng,Chengxuan Zhou,Shucan Qin,Jinbiao Liang,Shengyun Xu,Jiaming Mao,Jianming Shi,Yanrong Liu,Yunqian Ma
Electrochemistry allows for the simultaneous conversion of hydrogen sulfide (H2S) to hydrogen (H2) and sulfur, achieving atomic economy, and is a sustainable and cost-effective method. At the same time, an electrolyte with high conductivity and H2S absorption that can effectively capture H2S in an electrochemical process is essential. An ionic liquid electrolyte system for the absorption and electrolysis of H2S was constructed using the guanidine salt ionic liquid with amine-based functional groups as the carrier electrolyte, water as the solvent, and NaOH as the H2S absorber. The prepared electrolyte ([TMG][IM]-AE-30) showed a strong absorption of H2S with an equilibrium solubility of 100.82 g L−1. Under constant potential electrolysis at 1.0 V vs. RHE, the maximum hydrogen production rate reaches 2919.97 μmol h−1 and the Faraday efficiency reaches 99%, and the anodic product is α-sulfur with a production of 0.881 g after electrolysis for 8 h; the current density and hydrogen production rate are still higher than those of the AE systems after three cycles. Overall, the system has good hydrogen sulfide absorption and electrolysis performances, and [TMG][IM] can effectively improve the H2S absorption and electrolysis efficiencies.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
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IF 19
Jiada Han,Huanhuan Yang,Hao Yan,Xianglong Sun,Qingwu Huang,Man Zhang,Shasha Zhang,Yiqiang Zhang,Yanlin Song
Perovskite solar cells (PSCs) have become a highly anticipated research direction in the field of next-generation photovoltaic technology due to their excellent photoelectric conversion performance. One core issue for high-performance PSCs is to suppress the non-radiative recombination caused by defects in the perovskite layer and at the interfaces. In this work, a novel functionalized sulfonate-based ionic liquid, 1-ethyl-3-methylimidazolium methyl sulfonate (EMIM-MS), is introduced for in situ defect passivation during the perovskite crystallization process. For the anionic part of EMIM-MS, the -SO 3 − group can form coordination with Pb 2+ , and the -CH 3 groups can form hydrogen bonds with I−. Coupled with the formation of hydrogen bonds between EMIM-MS and formamidinium (FA + ), high-quality perovskite films with large crystal size and low defect density are achieved. In addition, due to its large molecular size, EMIM-MS can be squeezed to the surface during annealing, playing an important role in passivating defects at the interfaces. Therefore, the efficiency of PSC based on EMIM-MS is significantly improved to 25.48% from the controlled 22.24%, and the long-term storage and wet heat stability are also improved. This strategy provides valuable insights for defect passivation and helps promote the industrialization of PSC.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Jia-Qi Wu,Qing He,Zhuang-Zhuang Li,Si-Wen Li,Wei Wang,Jian-She Zhao
Lignin, a major component in renewable plant biomass, serves as a potential source of high-value aromatic chemicals. However, efficiently decomposing lignin while maintaining its aromaticity for fossil fuel substitution remains a significant challenge. This study synthesized a [VimAm]Br@POM@AC catalyst, composed of a Keggin-type polyoxometalate (POM) modified by ionic liquid ([VimAm]Br) and supported on activated carbon (AC). The response-surface methodology was applied to explore the catalytic performance of this catalyst in the oxidative depolymerization of lignin β-O-4 model compounds. Under the reaction conditions of 160 °C, 3 mL H 2 O 2 , and 0.4 g catalyst within 8 h, the conversion rate of lignin model compounds reached 83.01 %. The reaction generated diverse aromatic products, with the selectivity of methyl mandelate and methyl benzoate reaching 27.70 % and 59.02 %, respectively. Mechanistic studies revealed that the [VimAm]Br@POM@AC catalyst selectively cleaves C O bonds in β-O-4 dimers, facilitating the formation of aromatic compounds. Moreover, FT-IR spectroscopy and SEM analysis confirmed the good stability of the recovered catalyst. This work achieves efficient directional conversion of lignin model compounds through the design of a multilevel-structured catalyst, precise optimization of reaction conditions, and innovative mechanistic interpretation. It offers a novel strategy with both academic significance and application potential for the high-value utilization of biomass resources.
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Reaction Chemistry & Engineering
·
2024
·
IF 3.4
Yinghui Mu,Xin Ju,Cuiying Hu,Lishi Yan,Jiayi Tian,Su Ma,Liangzhi Li
Protein surface charge engineering has promising applications for a deeper understanding of the adsorption and action mechanisms between enzymes and substrates. The engineering modification of β-glucosidase (BGL) is conducive to greatly reducing the negative feedback inhibition in biomass resource utilization and improving the utilization efficiency. Herein, the mutants BGL-14 and BGL-1, which had the largest difference in surface ζ-potential (−12.5 mV and −4.6 mV) obtained by rational design in previous studies, were selected to explore their adsorption behaviors on cellulose and lignin using an adsorption isotherm model. The results showed that more negative charges on the enzyme surface facilitated adsorptive contact with substrates while repelling lignin to reduce competitive adsorption, and that the monolayer coverage might be the main mechanism for cellulose/lignin adsorption of enzyme. Secondly, commercial cellulases were added to the modified BGLs to form a “cocktail” of enzymes (BGL-C) to synergistically participate in the in situ saccharification of biomass pretreated with ionic liquids (ILs). The BGL-14-C synergistic hydrolysis system presented a strong conversion ability in low concentrations of ILs, and its catalytic biomass production of reducing sugars at 5% (v/v) 1-ethyl-3-ethyl-imidazolium diethylphosphate ([EEIM]DEP) reached a yield of 1.24 g L−1, which was 130% and 136% of that of WT-C and BGL-1-C, respectively. BGL-1-C, on the other hand, exhibited higher thermal stability, with the catalytic rate remaining at 51% when the temperature was increased from 50 °C to 70 °C in 1-ethyl-3-methyl-imidazolium diethylphosphate ([EMIM]DEP). Our study delves into the role of enzyme surface charge in reducing unproductive adsorption and increasing the probability of contact with the substrate, providing a theoretical basis for understanding the role of surface charge in mixed systems.
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JOURNAL OF RARE EARTHS
·
2025
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IF 7.2
Yanxu Wang,Siyuan Yang,Qianqian Wang,Bo Chen,Shenxu Bao,Wenbo Li,Cheng Liu
The efficient flotation separation of rare earth elements (REEs) from gangue minerals is crucial in mineral processing. This study synthesized a quaternary ammonium salt ionic liquid collector, tetrabutylammonium salicylhydroxamate (T-S), and investigated its performance in separating bastnaesite and fluorite. T-S was synthesized from salicylhydroxamic acid (SHA) and tetrabutylammonium chloride (TBAC), and its molecular structure was characterized using Fourier transform infrared (FTIR) spectroscopy. Microflotation tests indicate that T-S outperforms SHA and TBAC in both collecting ability and selectivity for bastnaesite. Adsorption, zeta potential, and infrared spectroscopy measurements reveal that T-S exhibits stronger adsorption on bastnaesite compared to SHA and TBAC. X-ray photoelectron spectroscopy (XPS) and molecular dynamics simulations (MDS) results confirm that chemical adsorption occurs between Ce on the bastnaesite surface and the –C(=O)NHOH groups of T-S. Moreover, the interaction between T-S and the bastnaesite surface is stronger than that with the fluorite surface. This work provides valuable insights for designing ionic liquid collectors for the flotation separation of bastnaesite and fluorite.
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JOURNAL OF SEPARATION SCIENCE
·
2025
·Vol. 48
·期 9
·e70265
·
IF 2.8
Yingying Zhang,Ruixue Zhang,Xuzhao Yang,Longhuan Wu,Ying Li,Yakun Li,Dan Ping,Runyi Liu,Daming Wu,Xintong Jiang
The extraction of bioactive compounds from natural plants has received considerable attention, with deep eutectic solvents (DESs) being considered as a novel kind of green solvent in the extraction processes. To extract bioactive ingredients from natural plants, a series of DESs was synthesized by combining a newly Gemini ionic liquid (IL), C 3 (MIM) 2 Br 2 with ethylene glycol (EG) in various molar ratios (1:3, 1:4, 1:5, and 1:6). The structure of the C 3 (MIM) 2 Br 2 /EG(1:6) system was characterized using Fourier-transform infrared spectroscopy, as well as 1 H and 13 C nuclear magnetic resonance spectroscopy. The synthesized DESs were employed for the ultrasonic-assisted extraction (UAE) of flavonoids from Lycium barbarum L., and the flavonoid was quantified using ultraviolet-visible spectroscopy. Key process parameters, including extraction time, temperature, and solid-liquid ratio, were optimized through single-factor analysis and L 9 (3 3 ) orthogonal array experiments. The results demonstrated optimal extraction conditions as follows: extraction time of 40 min, extraction temperature of 50°C, and a solid-liquid ratio of 1/50 (g/mL) (the ratio of the mass of the solid material to the volume of the liquid as the extract, g/mL). Statistical analysis revealed that extraction temperature and extraction time had both probability values less than 0.05, indicating a significant impact on the extraction rate, and the extraction yield of flavonoids reached 17.94 mg/g, exceeding that achieved with 60% ethanol. The Gemini IL-based DESs exhibited distinct advantages in flavonoid extraction compared to traditional organic solvents. Additionally, the mechanisms underlying UAE using DESs were investigated through thermogravimetric analysis and scanning electron microscopy. The findings indicate that ultrasonically-assisted incorporation of Gemini ILs holds promise for advancing the extraction of bioactive substances.
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Nature Catalysis
·
2025
·
IF 44.6
Xing Chuanwang,Mao Chengliang,Wang Shenghua,Zhou Yuxuan,Wu Lei,Zhang Dake,Kang Dingxuan,Yang Di,Gong Weiting,Wei Wendong,Wang Liang,Li Chaoran,Ozin Geoffrey A.,Yang Deren,Sun Wei
The accumulation of plastic waste has become a global issue. Socially and industrially viable, sustainable technical solutions are therefore required. Here we report a solar thermal catalytic system for polyolefins upcycling using copper nanoparticles encapsulated by stacked two-dimensional silicon. In a chloroaluminate ionic liquid solvent, unlike conventional thermal techniques, the upcycling can proceed under a mild temperature (55 °C) created photothermally under 4 sun irradiation. The polyethylene can be completely transformed into distinct and separable fractions of alkanes (C 3 –C 7 ) and cyclic hydrocarbons (C 8 –C 26 ) within hours, with a total yield of 91%. Mechanistic studies show a pathway involved two β-scissions of C–C bonds and a rapid cyclization. The approach offers versatility in the upcycling of various real-world polyolefin waste and features excellent feasibility in outdoor practices. The analyses of a conceptual upcycling facility using this technology showcase its appeal in both economic and eco-friendliness.
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危险品化学品经营许可证（带存储）