ENERGY CONVERSION AND MANAGEMENT
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2017
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IF 5.589
Heng Zhang,Hu Li,Hu Pan,Xiaofang Liu,Kaili Yang,Shan Huang,Song Yang
In the present study, catalytic production of biodiesel from a new alternative non-edible feedstock Koelreuteria integrifoliola ( K. integrifoliola ) with a Brönsted-Lewis acidic ionic liquid (IL) immobilized on a magnetic support Fe 3 O 4 @SiO 2 (FS-B-L-IL) was investigated for the first time. Excitingly, K. integrifoliola contains a high oil content (54.05%) with an average acid value (AV) of 4.66 mg KOH/g. Furthermore, the FS-B-L-IL catalyst was characterized with XRD, FT-IR, SEM, HR-TEM, TG, pyridine-IR and VSM. It was found that FS-B-L-IL possessed a uniform core-shell structure with strong magnetic responsiveness, and showed high activity in simultaneously catalytic transesterification and esterification of crude K. integrifoliola seed oil (CKISO), giving fatty acid methyl ester (FAME) yield of 93.7% under optimal conditions. The reaction followed pseudo-first order kinetics and the activation energy was calculated to be 62.6 kJ/mol. In addition, FS-B-L-IL exhibited a heterogeneous catalytic behavior and could be recycled for at least five times with negligible loss of activity. The main fuel properties of the obtained K. integrifoliola biodiesel were also evaluated, which were comparable to specifications prescribed in the ASTM D6751 and EN 14214.
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JOURNAL OF CHROMATOGRAPHY A
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2017
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IF 3.981
Lijun He,Wenhang Cui,Yali Wang,Wenjie Zhao,Guoqiang Xiang,Xiuming Jiang,Pu Mao,Juan He,Shusheng Zhang
In this study, layer-by-layer assembly of polyelectrolyte multilayer films on magnetic silica provided a convenient and controllable way to prepare polymeric ionic liquid-based magnetic adsorbents. The resulting particles were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and magnetic measurements. The data showed that the magnetic particles had more homogeneous spherical shapes with higher saturation magnetization when compared to those obtained by free radical polymerization method. This facilitated the convenient collection of magnetic particles, with higher extraction repeatability. The extraction performance of the multilayer polymeric ionic liquid-based adsorbents was evaluated by magnetic solid-phase extraction of four pesticides including quinalphos, fenthion, phoxim, and chlorpropham. The data suggested that the extraction efficiency depended on the number of layers in the film. The parameters affecting the extraction efficiency were optimized, and good linearity ranging from 2 to 250 μg L −1 was obtained with correlation coefficients of 0.9994–0.9998. Moreover, the proposed method presented low limit of detection (0.5 μg L −1 , S/N = 3) and limit of quantification (1.5 μg L −1 , S/N = 10), and good repeatability expressed by the relative standard deviation (2.0%–4.6%, n = 5). The extraction recoveries of four pesticides were found to range from 58.9% to 85.8%. The reliability of the proposed method was demonstrated by analyzing environmental water samples, and the results revealed satisfactory spiked recovery, relative standard deviation, and selectivity.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2017
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IF 4.421
Panpan Zhao,Fan Yang,Zhigang Zhao,Qiuxiao Liao,Yang Zhang,Peng Chen,Wanghuan Guo,Ruixi Bai
For the first time, our group has developed a novel, high-flux strategy for shape-controlled synthesis of rare earth nano-materials (CePO 4 ) using ionic liquid(IL)-driven supported liquid membrane (HVHP, DUPAPORE ® ) system. The system contains three phases including a supply phase of rare earth ions, a feed phase of phosphates, and ionic liquid-driven supporting liquid membrane phase. The imidazolium IL-driven supported liquid membrane is promising for nano-synthetic reaction of CePO 4 . The anion types of immersed imidazolium IL have a critical role in the formation rate of CePO 4 nano-materials. Moreover, the adding SO 4 2− anion or adjustment of pH in supply phase containing Ce(III) ions could control effectively the morphology of the CePO 4 nano-materials. The result can be regarded as a good example, the IL:[C 4 mim][Tf 2 N] −driven support liquid membrane systems can be used to prepare nano-wire and nano-sphere structures of CePO 4 with high efficiency and flux. Besides, the IL-driven supported liquid membrane can be cycled many times by using the back flush activation method.
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JOURNAL OF CHROMATOGRAPHY A
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2025
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IF 4
Yong Man,Juan An,Chenxi Liu,Yaming Sun,Xuemeng Xu,Chenchen Song,Renyong Zhao,Lijun He
In this study, polymeric ionic liquids (PILs) modified magnetic nanoparticles were used to extract four aflatoxins (AFs) from wheat samples, providing a convenient and cost-effective sample preparation technique for AFs detection in the complex food matrix. The extraction parameters were optimized in terms of the amount of adsorbent, adsorption time, type and volume of desorption solvent, desorption time, and salt addition. The results showed that the proposed method had high sensitivity, good repeatability, and wide linear range. The limits of detection (S/N=3) of four AFs were 0.05-0.41 μg kg -1 . The accuracy was also evaluated using spiked wheat samples and acceptable relative recovery of four AFs at different fortification levels were obtained, ranging from 50.3 %-110.4 %. It was indicated that both the anion species and the alkyl chain length of cation in PILs significantly affected the extraction efficiency. Meanwhile, multiple interactions, including hydrogen bonding, π-π and p-π, and hydrophobic interactions between the adsorbent and the AFs, were responsible for the effective extraction.
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FOOD HYDROCOLLOIDS
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2024
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IF 11
Yali Zhao,Dina M. El-Sherif,Jun Cheng,Huan Zhang,Zhenyang Hu,Qin Wu,Hui Shen,Zhilong Yu,Yunfei Xie
The development of a real-time monitoring system for meat freshness is crucial for ensuring food safety and enhancing the efficiency of the food supply chain. Herein, this study constructed a carboxymethyl cellulose-based colorimetric nanosensor array incorporating ionic liquid-tuned anthocyanins, a porous metal-organic framework particle (UiO-66), and nano-silica coating for real-time monitoring of pork freshness. Density functional theory calculations and multiple spectral analysis confirmed the mechanism by which ionic liquids tuned the anthocyanin color gamut. The sensor array's mechanical properties, thermal stability and sensitivity were significantly improved through the incorporation of UiO-66. The hydrophobic coating of the sensor array greatly enhanced the water contact angle rising from 76.5° to 134.8°, rendering excellent stability in high humidity conditions. The sensor array demonstrated good responsiveness and the durability up to 11 cycles to 5 common amine gases produced by meat spoilage. Additionally, the sensor array was integrated with 4 deep convolutional neural network models to predict pork freshness, all achieving accuracy rates above 97%. Notably, the VGG16 model achieved an accuracy rate of 99.16%. The designed monitoring system demonstrates significant potential for practical applications in intelligent meat packaging.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Meng Wei,Pengfei Zhai,Yihan Li,Xin Zhao,Jiancheng Li,Tao Zhang,Guanghui Liu,Zhanjun Yu,Song Xu
The NASICON-type ceramic Li 1·5 Al 0.5 Ge 1.5 (PO4) 3 (LAGP) electrolyte has been proposed as the most competitive candidates of electrolyte materials toward solid-state Li metal batteries (LMBs) by reason of its high ionic conductivity , cyclic stability under extreme temperatures and wide voltage window. However, poor interface contact, high interfacial resistance and intractable mechanical properties greatly limit its practical applications. In this work, an inorganic-polymer “LAGP in PVDF” quasi-solid-state electrolyte (QSSE) is developed via solution casting method, in which pyr14TFSI ionic liquid (IL) and LiTFSI are combined as functional wetting interface . Benefiting from the coherent interaction of LAGP nanoparticles incorporated into the polymer matrix , and inherent protection of IL, the overall performance of the optimized QSSE include thermal stability, dense structure, flexibility and electrochemical properties . The XRD, SEM, XPS tests demonstrate that the IL using as a solid/electrolyte modified interlayer can enhance Li + transport, interfacial infiltration and homogenize lithium deposition. The LiFePO 4 |PL-25LAGP|Li solid-state battery presents an excellent circulation performance under ambient temperature, which displayed an initial discharge specific capacity of 146.8 mAh g −1 at 0.5C and capacity retention of 96.25 % after 150 cycles. The flexibility PL-LAGP CSE shows superior safety and greater development potential for the “LAGP in PVDF” composite electrolyte in solid state LMBs.
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FOOD CHEMISTRY
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2024
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IF 8.5
Yun Tian,Na Wang,Huanyu Liu,Tongxin Qiu,Chuan Chen,Xia Liu,Yuanqiang Zhu
Curcuminoids originated from the plant Curcuma longa L. show high medical values. Herein, ionic liquids (ILs) were synthesized using fatty acids and alcohol amines to extract curcuminoids. Through single-factor experiments and response surface methodology (RSM) optimization, the extraction amount of curcuminoids by [TEA][FA-C 7 ] aqueous solution reached 34.89 mg/g at a liquid-solid ratio of 16.36 mg/g and an extraction temperature of 36 °C, surpassing that of methanol. The extraction capacity of [TEA][FA-C 7 ] to curcuminoids was 299.33 mg/g. Furthermore, the separation of extracts and recovery of fatty acids were studied. Quantum chemical calculations and molecular dynamics simulations were performed to investigate the extraction mechanism profoundly. This study not only proposed a novel green solvent for the extraction of curcuminoids from the plant Curcuma longa L. but also provided the possibility of applying fatty acid-based ILs to extract natural medicine efficiently.
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Gongwen Yang,Xuyang Chen,Wenjuan Shi,Ni Chen,Yi Liu,Bo Zhang,Zhengzhong Shao
The silk fibroin (SF)/ionic liquid (IL) based hydrogel is a kind of remarkable substrate for flexible devices because of its subzero-temperature elasticity, electrical conductivity, and water retention, although the procedure of the gelation is considered complex and time-consuming. In this work, we introduced an approximate method for the development of novel photo-cross-linked SF/IL hydrogel, that is, SF-IMA/PIL hydrogel via the modification of silk fibroin chain with 2-isocyanatoethyl methacrylate (SF-IMA) in a certain ionic liquid with an unsaturated double bond. The chemical cross-linking between methacrylated SF and IL was triggered by UV light, while the physical cross-linking of the hydrogel was attributed to the β-sheet formation of SF in SF-IMA/IL mixed solution. In addition to being a UV-induced three-dimensional (3D) printable one, the SF-IMA/PIL hydrogel performed significant ionic conductivity between room temperature and −50 °C and water retention within a wide range of relative humidity, which were the featured advantages as the ionic liquid involved. Moreover, the static and dynamic mechanical tests demonstrated that the hydrogel reserved its great elasticity at −50 °C and displayed its stiffness transition temperatures between −100 and −70 °C.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Bingying Wang,Lingling Zhang,Xiaoxing Lu
Aqueous two-phase system (ATPS) has been considered a promising alternative to traditional water-organic systems in liquid-liquid extraction. In this study, extractions of L-tryptophan (Trp), L-tyrosine (Tyr), vanillin (Van) and theophylline (Thp) under various conditions were investigated using the ATPS formed by 1-(2-hydroxyethyl)piperazinium laurate ([HEP][C 11 CO 2 ]) and dodecyldimethylbenzylammonium chloride (DDBAC). Pseudo-ternary phase diagrams were obtained for the DDBAC/[HEP][C 11 CO 2 ]/brine systems at 25.0 °C. In all the ATPSs, the extracts migrated to the top phase, which exhibited higher hydrophobicity than the bottom phase. Due to the increased hydrophobicity difference between two phases, increasing water content from 0.70 to 0.96 resulted in a decrease of the recovery ( R ) of Van from 96 % to 84 %, while the R values of Trp, Tyr and Thp markedly decreased by at most 54 %. The highest partition coefficient ( K ) was observed with Van. Increasing the molar ratio of DDBAC to [HEP][C 11 CO 2 ] resulted in higher R values of Trp and Van, while the initial concentration of extract and the extraction temperature showed limited effects on the partition behavior. NaCl addition effectively expanded the ATPS region in the phase diagram, due to the enhanced salting-out effect. However, it negatively impacted the recovery of Trp and Van, primarily due to the volume expansion of the bottom phase. The results suggested that the water-rich SAIL-ATPS was suitable for the extraction of highly hydrophobic compounds such as Van.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Kaili Wang,Jiayi Bai,Zhenyu Zhao,Zhaowei Zhang,Weiqi Mao,Lili Jiang,Haoran Li,Congmin Wang
The increasing CO 2 concentration in the atmosphere has caused a lot of environmental problems. However, absorbents for highly efficient and reversible carbon capture, especially direct air capture, are still under development. Herein, a strategy of improving the CO 2 absorption and desorption behavior of a kind of imidazole-based ionic liquid for reversible CO 2 capture from ambient air via hydrogen bonding interaction was reported. By adding different hydrogen bond donors, the CO 2 capacities and absorption enthalpies of imidazole-based IL ([N 2224 ][Im]) were well tuned. Between them, [N 2224 ][Im]-Car exhibited a relatively high CO 2 capacity at the atmospheric CO 2 concentration of 0.4 mbar at 30 °C up to 0.6 mol CO 2 per mol IL and excellent reversibility. Compared with pure [N 2224 ][Im], the regeneration performance of [N 2224 ][Im]-Car was immensely enhanced, making it more promising for energy-efficient CO 2 capture and practical application in direct air capture.
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JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Haiyan Du,Qing Xu,Jiaying Wang,Li Yang,Feng You
The functional ionic liquid gels have attracted increasing attention in the fields of smart sensors, flexible wearable devices, and artificial sensors, but it is challenging to develop multifunctional gels to meet the complex applications requirement. The aim of this work was to develop the multifunctional poly(ionic liquid) gels (PILGs) with conductivity, self-healing, high stretchability, redox-driven shape memory, and strain sensing. Considering the designable structure and conductivity of the poly(ionic liquid) (PILs), we proposed one hypothesis. Is it possible to synthesize the PILs and to fabricate the multifunctional PILGs through supramolecular self-assemble strategy? Herein, imidazolium-based PILs was synthesized, and poly(vinyl alcohol) (PVA) was chosen to composite with PIL for fabricating the gels. Apart from the hydrophilic and nontoxic property of PVA, another important reason of choosing it is that the hydroxyl groups in PVA could form hydrogen bonds with the strongly electronegative atoms (N, F, and O) in PIL. As expected, the PILs/PVA mixed solution was converted to gels in acidic condition at room temperature, and the gelation mechanism was studied. The reversible non-covalent bonds endowed the gels with satisfied self-healing, strains sensing, and stable mechanical properties. The addition of PILs facilitated the gelation and improved the self-healing and strength. The healed PILGs sensors could monitor the human joint movement, facial expression, and speech recognition etc. The one-step solution gel transition strategy will provide a universal approach for preparing multifunctional gels, which have great potential in strain sensors, soft electronic materials, and portable testing equipment etc.
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ANALYTICA CHIMICA ACTA
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2024
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IF 5.7
Xiaxing Feng,Yaming Sun,Tao Zhang,Jingna Li,Hailiang Zhao,Wenjie Zhao,Guoqiang Xiang,Lijun He
Background Aflatoxin B 1 (AFB 1 ) and its precursors contaminate food and agricultural products, posing a significant risk to food safety and human health, but simultaneous and effective extraction and determination of AFB 1 and its precursors with varied structures is still a challenging task. Results In this study, a bisimidazolium-type ionic liquid functionalized mesoporous multipod silica (SiO 2 @mPMO-IL(im) 2 ) was fabricated to extract AFB 1 and its two precursors, i.e., averantin and sterigmatocystin. The SiO 2 @mPMO-IL(im) 2 could simultaneously extract three targets with varied structures based on the multipods, mesopores, and multifunctional groups. The density functional theory calculations further verified the multiple interactions between SiO 2 @mPMO-IL(im) 2 and targets. The fabricated SiO 2 @mPMO-IL(im) 2 could effectively extract and determine three targets in grains by combing with dispersive solid-phase extraction and high-performance liquid chromatography. Good linearity (r 2 > 0.9978), low LODs (0.9–1.5 μg kg −1 ) and LOQs (3.0–4.5 μg kg −1 ), satisfactory spiked recoveries (92.5%–106.8%) and high precisions (RSD<6.4%) were observed. Significance and novelty This work demonstrates the feasibility of SiO 2 @mPMO-IL(im) 2 for simultaneous and effective extraction of toxins with varied structures and provides a promising sample preparation for the analysis of AFB 1 and its precursors in grain samples.
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