Petroleum Science
·
2024
·
IF 6
Ran Liu,Chang Wang,Qiang Yang,Jing-Ran Yang,Chen Liu,Liberty Mguni,Xin-Ying Liu,Ya-Li Yao,Fa-Tang Li
The development of highly active functionalized ionic liquids (ILs) as both extractants and catalysts for use in achieving deep desulfurization continues to pose challenges. In this study, a highly efficient oxidative desulfurization system was constructed, composed of dual-acidic ionic liquids (DILs) and H 2 O 2 -AcOH. The investigation results of four DILs prepared from different metal chlorides ([HSO 3 C 3 NEt 3 ]Cl-MnCl n , MnCl n = AlCl 3 , ZnCl 2 , CuCl 2 , FeCl 3 ) in oxidative desulfurization showed that [HSO 3 C 3 NEt 3 ]Cl-AlCl 3 had an outstanding catalytic effect and significantly promoted the oxidation of sulfides. With a 0.2 g [HSO 3 C 3 NEt 3 ]Cl-AlCl 3 , the removal rate of dibenzothiophene (DBT) reached 100% in 10 mL model oil under mild conditions at 55 °C for 20 min. The key is its ability to induce the dismutation of superoxide anions (•O 2 − ), which facilitates the generation of singlet oxygen ( 1 O 2 ). The efficient oxidation of DBT is accomplished through a predominantly 1 O 2 -mediated non-radical mechanism. [HSO 3 C 3 NEt 3 ]Cl-AlCl 3 serves as a favorable medium for contact to be made between 1 O 2 and sulfides, which indicates an efficient catalytic-adsorption synergy.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yaoxian Hu,Hui Su,Wensen Liu,Zhaowu Zhu,Tao Qi
Effective lithium extraction from magnesium-rich brines is crucial to meet the increasing lithium demand. Traditional solvent extraction using tributyl phosphate (TBP) as the main extractant exhibits limited Li/Mg separation and dissolution losses during long-term operation. Herein, a novel ionic liquid-assisted lithium extraction system (2-Ethylhexyl diphenyl phosphate (DPOP)/1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide [Emim][NTf 2 ]) using organophosphate containing rigid phenyl groups was proposed. The phenyl group increased the steric hindrance of the extractant, enhancing the system efficiency for separating Li + from impurities. Results demonstrated that introducing the phenyl group into phosphate considerably improved the Li/Mg and Li/Ca separation factors, reaching 4,641 and 93, respectively, under optimal conditions, with a single-stage Li + extraction efficiency of 67%. After washing and stripping, a LiCl solution (purity = 99.68%) was obtained. Electrospray ionization mass spectrometry confirmed that the molecular formula of the extracted Li + complex was [Li·2DPOP][NTf 2 ]. Subsequent density functional theory calculations on the complexes revealed shorter bond lengths for the DPOP/[Emim][NTf 2 ] system with Li + than those with Mg 2+ and more negative binding energy and Gibbs free energy change during Li + extraction. Therefore, this system preferentially extracts Li + with tighter and more stable binding than Mg 2+ , exhibiting excellent Li selectivity.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Kaiyu Yang,Baolin Xu,Qiuxiang Lin,Yongshen Yu,Hailong Hu,Fushan Li
Perovskite light-emitting diodes (PeLEDs) have attracted wide attention due to their excellent photoelectric properties. A variety of additives have been studied for perovskite emission layers to enhance the performance of PeLEDs. However, the buried interface, which also has significant influence on the crystallization kinetics and exciton recombination dynamics of the perovskite emission layer, remains to be explored. In this work, we introduced a new ionic liquid 1-Ethyl-3-methylimidazolium dicyanamide (EMIM DCA) with the characteristics of low viscosity and high conductivity into the interfacial layer between the hole transport layer (HTL) and the perovskite film. Due to the strong interaction between the EMIM DCA and perovskite, the crystallization of the perovskite film is obviously improved and the defects at the interface are well passivated. As a result, the nonradiative recombination in the interlayer is significantly reduced. In addition, the introduction of EMIM DCA promoted the injection of charge carriers, thus achieving a high luminance of 32310 cd m −2 and enabling the maximum external quantum efficiency (EQE) of the PeLEDs increased from 10.2 % to 18.7 %.
✓ 已验证
产品关联
DOI
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.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2018
·
IF 4.908
Wenlei Xie,Fei Wan
The main purpose of this present work is to fabricate a magnetically recyclable solid catalyst for the production of biodiesel to meet the demand of green and clean production. To accomplish this, the core–shell structured Fe 3 O 4 @HKUST-1 composites with a magnetic core and a porous metal-organic framework shell were fabricated by using a versatile Layer-by-Layer assembly method, and then basic ionic liquids were encapsulated within the core–shell magnetically responsive material, resulting in a solid hybrid base catalyst. Various techniques such as XRD, TEM, FT-IR, VSM and nitrogen adsorption–desorption were employed to characterize the as-prepared solid base catalyst. The characterization results revealed that Fe 3 O 4 nanoparticles were well coated with metal-organic framework HKUST-1 with the formation of core–shell structured nanocomposites, and moreover the basic ionic liquid had been successfully encapsulated within the magnetic nanocomposites. Furthermore, the solid base catalysts possessed superparamagnetic behavior and high saturation magnetization, allowing them to be facilely separated from the reaction mixture by using an external magnetic filed. The solid base catalyst appeared to be an efficient and environmentally benign catalyst for the transesterification of soybean oil with methanol for the production of biodiesel, giving 92.3% oil conversion to methyl esters within 3 h with a catalyst loading of 1.2 wt% and a methanol/oil molar ratio of 30:1 at reflux temperature of methanol. The solid catalyst could be readily recovered by simple magnetic decantation and reused for several times without significant degradation in its catalytic activity.
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2018
·Vol. 64
·期 7
·2536-2544
·
IF 3.326
Lifeng Yang,Qiwei Yang,Jingyi Hu,Zongbi Bao,Baogen Su,Zhiguo Zhang,Qilong Ren,Huabin Xing
Ionic liquid (IL)-stabilized metal nanoparticles (NPs) have attracted increased attention as novel catalysts for various reactions due to their excellent stability and high activity. However, the high viscosity of ILs limits their applications. Here, for the first time, we reported an NPs@IL-cosolvent liquid–liquid biphasic system for metal NPs catalysis. The NPs were successfully confined to IL phase, and abundant IL droplets containing NPs were generated under the reactant flow. The NPs@IL droplets served as microreactors for the catalysis; while the low viscosity organic phase enabled the rapid mass transfer of substances. The biphasic system exhibited improved performance for acetylene hydrochlorination than that of the pure IL system. An acetylene conversion of 98% and a selectivity of 99.5% were achieved along with a 90% decrease on IL usage. The tolerable gas hourly space velocity in the biphasic system for a satisfactory conversion was almost double that of the pure IL system. © 2018 American Institute of Chemical Engineers AIChE J , 64: 2536–2544, 2018
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zhonghai Tang,Yunlan Chen,Changyong Cai,Shaoping Ma,Zhijian Tan
The extraction of Rosa roxburghii polysaccharides using conventional methods suffers from low extraction efficiency and poor selectivity. Recently, green and efficient methods of polysaccharide extraction have received increasing attention. In this study, a CO 2 -responsive ionic liquid (IL) was developed for the extraction of Rosa roxburghii polysaccharides. This IL can achieve efficient extraction, and can be recycled, and reused in the extraction process. The maximum polysaccharide extraction yield of the IL was 253 mg/g under optimal single-factor experiment conditions. Three fractionated polysaccharides, RTFP-1, RTFP-2, and RTFP-3, were obtained by further purification, and their preliminary structures were characterized. RTFP-2 and RTFP-3 showed higher antioxidant and hypoglycemic activities than RTFP-1. This IL maintains high extraction efficiency after 5 cycles and reuse. This extraction method based on a CO 2 -responsive IL provides an efficient and sustainable method for polysaccharide extraction.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2024
·
IF 3.7
Wei Zhao,Chi Fan,Li Liu,Xiaohui Ma,Bin Feng
Functionalized ionic liquids have great potential for capturing CO 2 in mixed absorbents due to their unique structural and adjustable properties. In this work, a novel, highly efficient, and renewable non-aqueous absorbent of amino-functionalized ionic liquid, [TETAH][3-Br-PhO]-PEG200, is utilized for CO 2 capture. Here we mixture [TETAH][3-Br-PhO] and PEG200 in different proportions and studied the effects of reaction temperature, mass ratios, and the interaction between [TETAH][3-Br-PhO] and PEG200 on CO 2 absorption capacity. Based on the experimental results, the mechanism of CO 2 capture by [TETAH][3-Br-PhO]-PEG200 is elucidated using 13 C NMR and FTIR spectroscopy. The results indicate that at 298.15 K and a mass ratio of 3:7, the designed absorbent achieves an optimal effective absorption capacity of 2.37 mol/kg. The interaction between [TETAH][3-Br-PhO] and PEG200 enhances the CO 2 capture capacity of [TETAH][3-Br-PhO]-PEG200 and leads to the formation of a solid phase. After five cycles of absorption and desorption at 393.15 K, the optimal absorbent still maintains excellent recyclability and achieves a 72 % regeneration efficiency. Additionally, the non-aqueous absorbent of [TETAH][3-Br-PhO]-PEG200 exhibits high absorption performance and efficient recyclability compared to the traditional MEA. These findings suggest that [TETAH][3-Br-PhO]-PEG200 shows promise as a sustainable CO 2 absorbent material.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Qina Sun,Mengzhou Wang,Yujia Yang,Jinshan Song,Junfeng Li,Qingrui Zhang
Commonly used polyoxometalate (POM) adsorbents exhibit high cesium (Cs) adsorption capacity. However, its impotent ability to sequester adsorbates poses a risk of Cs migration in radioactive waste decontamination and disposal. By leveraging the cesium affinity of POMs and the regulatory properties of ionic liquids (ILs), POM-IL composites hold promise for mitigating the risk of cesium migration through efficient adsorption and retention. Herein, we designed two POM-ILs composed of the phosphotungstate anion (PW) and tetrabutylammonium cation (TBA), i.e., the {WO 6 }-saturated TBA-PW 12 and mono-lacunary TBA-PW 11 , for the capture and retention of aqueous Cs. The composites were then characterized, and the performance and mechanism of Cs uptake were investigated. TBA-PW 12 exhibited ∼300 nm aggregate of particles around 20–60 nm. TBA-PW 12 retained the Keggin structural features of PW 12 O 40 3− , which was proven essential for the binding of Cs + . With a retention efficiency of 97.3% in an NH 4 Cl eluent and a maximum adsorption capacity of 400.9 mg/g at 338 K, TBA-PW 12 exhibited superior Cs capture and retention compared to the POM-IL derived from common Cs adsorbent phosphomolybdate. The Cs adsorption onto TBA-PWs achieved equilibrium within 180 min. Cs uptake by TBA-PWs was monolayer chemisorption of Cs + accompanied by H + release, and the removal efficiencies stabilized around initial pH 5–10. Due to intense affinity between {WO 6 } and Cs + , TBA-PW 12 efficiently sequestered Cs + through {WO 6 } octahedra so that the {WO 6 }-saturated TBA-PW 12 presented better Cs uptake performance than the mono-lacunary TBA-PW 11 . The IL anion [N(C 4 H 9 ) 4 ] + provided a composite-water biphasic interface for aqueous Cs adsorption, while retaining the ability of POM cation PW 12 O 40 3− to form a stable structure with Cs via its affinity to {WO 6 } octahedra. These findings support the design of POM-IL composites as efficient adsorbents for capturing and retaining Cs, aiding in the decontamination and safe disposal of radioactive waste, thereby minimizing the risk of nuclide leakage into the environment.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Ruiqi Zhang,Panpan Hao,Xiujie Cheng,Rana R. Neiber,Ling Wang,Yi Li,Junli Xu,Dongxia Yan,Qing Zhou,Jiayu Xin,Xingmei Lu
Ionic liquids (ILs) have been recognized as environmentally friendly and effective catalysts for poly (ethylene terephthalate) (PET) glycolysis. However, further investigation is required to gain a deeper understanding of the depolymerization mechanism. In this study, a series of experiments are conducted to investigate the impact of metallic and non-metallic ILs, containing diverse anions, on the interaction with PET surfaces. The findings indicate that the catalytic efficiency of IL is strongly correlated to the intensity of the interaction with PET. When the interface adhesion strength is more than twice that of PET/PET, the IL exhibits efficient catalytic properties in PET glycolysis. Therefore, an innovative approach involving the use of AFM for efficiently assessing highly effective IL catalysts is proposed. In addition, attenuated total reflectance Fourier transform-infrared (ATR-FTIR) spectroscopy and density functional theory (DFT) calculations further demonstrate the predominant interaction mechanism between ILs and PET. This research provides guiding significance for understanding the mechanism of PET glycolysis.
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 7
·1548
·
IF 4.2
Qian Wang,Tianqi Huang,Shuang Tong,Chao Wang,Hongping Li,Ming Zhang
With the increasingly strict limitations on emission standards of vehicles, deep desulfurization in fuel is indispensable for social development worldwide. In this study, a series of hybrid materials based on SiO2-supported polyoxometalate ionic liquid were successfully prepared via a facile ball milling method and employed as catalysts in the aerobic oxidative desulfurization process. The composition and structure of prepared samples were studied by various techniques, including FT-IR, UV-vis DRS, wide-angle XRD, BET, XPS, and SEM images. The experimental results indicated that the synthesized polyoxometalate ionic liquids were successfully loaded on SiO2with a highly uniform dispersion. The prepared catalyst (C16PMoV/10SiO2) exhibited good desulfurization activity on different sulfur compounds. Moreover, the oxidation product and active species in the ODS process were respectively investigated via GC-MS and ESR analysis, indicating that the catalyst can activate oxygen to superoxide radicals during the reaction to convert DBT to its corresponding sulfone in the fuel.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2012
·
IF 4.531
Juanjuan Feng,Min Sun,Jubai Li,Xia Liu,Shengxiang Jiang
Physical and chemical properties of ionic liquids (ILs) are significantly affected by types of their cations and anions. In this paper, a novel aromatically functional 1-vinyl-3-octylimidazolium 2-naphthalene-sulfonate salt was synthesized through metathesis reaction between 1-vinyl-3-octylimidazolium bromide and sodium 2-naphthalene-sulfonate, and polymerized onto the stainless steel wire in situ via surface radical chain-transfer reaction. Octanol/water distribution coefficient of the ionic liquid was studied and compared with that of 1-vinyl-3-octylimidazolium hexafluorophosphate. Partition coefficients of polycyclic aromatic hydrocarbons (PAHs) on these two polymeric ionic liquids-coated fibers indicated the enhanced hydrophobicity and aromaticity of the target IL. Analytical parameters exhibited high extraction efficiency of the novel fiber. Calibration ranges for several PAHs were from 0.02 to 200 μg L −1 . Limits of detection (LODs) were ranged from 0.005 to 0.01 μg L −1 . Application reliability of the proposed fiber was also investigated with some phthalate ester plasticizers. LODs were ranged from 0.02 to 0.05 μg L −1 . Hair spray and nail polish were used as real samples, and di-n-butyl phthalate and di-(2-ethyl-hexyl) phthalate were quantified with the established method.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）