ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Yong Wang,Haotian Liu,Jiahui Fan,Xueting Liu,Yafei Hu,Yulei Hu,Zhiyong Zhou,Zhongqi Ren
A fluoride-free ionic liquid 1-butyl-3-methylimidazolium phosphotungstate ([Bmim]3PW12O40) was synthesized and first used as co-extraction reagent for recovery of lithium ions from salt lake brine with a high Mg/Li ratio. Fourier transform infrared spectra (FT-IR), nuclear magnetic resonance (NMR) and thermogravimetric analysis (TGA) were used for characterizations of the prepared ionic liquid. Tributyl phosphate (TBP), [Bmim]3PW12O40, and dimethyl phthalate (DMP) were used as extractant, co-extraction reagent, and diluent, respectively. Effects of molar ratio of [Bmim]3PW12O40 to Li+, O/A phase ratio, volume fraction of TBP,and carbon chain length of ionic liquid on extraction efficiency and separation factor of Li+ were investigated. The overall extraction efficiency of Li+ was 99.23% after five stages cross-current extraction experiments under optimal conditions. The washing and stripping experiments of the organic phase were conducted, and the parameters were optimized. The reusability of the organic phase was investigated. A total of 10 regeneration cycles of extraction processes showed that the organic phase was highly stable for selective extraction of Li+. Finally, the extraction mechanism using the proposed extraction system was also explored. The results showed that the highly selective extraction of lithium ion was realized by cation exchange and coordination between TBP and Li+.
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CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Lingwan Hao,Lulu Sun,Ting Su,Dongmei Hao,Weiping Liao,Changliang Deng,Wanzhong Ren,Yanmei Zhang,Hongying Lü
In this study, a novel Polyoxometalate (POM)-based ionic liquid (IL), [3-(pyridine-1-ium-1-yl)propane-1-sulfonate] 3 (NH 4 ) 3 Mo 7 O 24 ·4H 2 O, abbreviated [PyPS] 3 (NH 4 ) 3 Mo 7 O 24 , was prepared and employed as a catalyst in the extraction and catalytic oxidative desulfurization (ECODS) of model and actual diesel . The catalyst was characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric and differential thermal analyses (TG-DTA) and X-ray photoelectron spectroscopy (XPS). The [PyPS] 3 (NH 4 ) 3 Mo 7 O 24 catalyst demonstrates unprecedented activity in oxidative desulfurization system that the removal of dibenzothiophene (DBT) could reach 99% under quite mild conditions ( T = 25 °C, n (catalyst) = 0.0056 mmol, t = 60 min, n (H 2 O 2 )/ n (sulfur) = 3, V IL /V Model Oil = 1/10). Moreover, the catalytic oxidative desulfurization system can work under the extreme reaction condition, i.e., the DBT removal could reach 99% even at 0 °C. Some important parameters which affect the ODS process, such as temperature, hydrogen peroxide dosage reaction systems and different sulfur compounds, were systematically studied. In addition, the catalyst exhibits remarkable selectivity to the catalytic oxidation sulfides compared with monocyclic or di-aromatics. And this desulfurization system could be recycled for five times without significant reducing the desulfurization. Furthermore, the deep catalytic oxidative desulfurization of actual diesel could also be achieved with this oxidative desulfurization system.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2018
·Vol. 165
·期 9
·D321
·
IF 3.662
Baoguo Zhang,Zhongning Shi,Lingling Shen,Aimin Liu,Junli Xu,Xianwei Hu
Herein, inspired by previous reports on the electrochemical reduction of Al in diverse electrolyte systems, we describe a novel Al-containing solvate ionic liquid (2:1 (mol/mol) mixture of ethylene carbonate (EC) and AlCl3) that allows low-temperature electrochemical deposition of Al and features the advantages of low cost, ease of preparation, and high electrochemical stability. Electrodeposition of Al-Li alloy and Li can also be realized in this system. Additionally, the above ionic liquid exhibited a saturated vapor pressure of 0.0012 kPa and a conductivity of 1.32 mS/cm at 298 K, which was acceptable for practical applications. To elucidate the electrochemical deposition mechanism, the ionic components of the 2:1 EC/AlCl3 system were characterized by a range of instrumental analysis techniques and theoretical calculations, and Lewis-acidic cations were identified as the electroactive species for Al electrodeposition. Notably, an Al-Li alloy could be obtained by co-deposition in the new solvate ionic liquid, and Li metal could also be electrodeposited on a high-purity Al plate in the form of Al4Li9 and Li3Al2 under ambient conditions using LiCl as a Li source. Al-containing solvate ionic liquids, which to an extent evolved from organic-salts, are of increasing interest. They are expected to gain more attention in the field of electrochemical metallurgy of active metals, due to their higher tunability and lower price.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Chengming Wu,Zhanyang Gao,Yi Wang,Yunbai Luo
Three kinds of imidazolide basic ionic liquids were prepared and employed as efficient catalysts for the synthesis of sec -butanol from the transesterification of sec -butyl acetate and methanol. The effect of anions and cations of basic ionic liquids on the catalytic activity were explored, and the relationship between their catalytic activities and basicities was established. Among various of basic ionic liquids, 1-butyl-3-methyl-imidazolium imidazolide ([Bmim]Im) performed better and was chosen for the further studying the influence of experimental conditions. The conversion of sec -butyl acetate reached 90.4% at 60 °C for 60 min under ambient pressure. In addition, the catalyst [Bmim]Im was repeatedly used for five times without noticeable drop in activity and obvious change in chemical structure. The reaction mechanism of the transesterification catalysed by [Bmim]Im was also proposed.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Yanyan Yu,Yuan Yang,Fan Wang,Jinhua Ding,Si Meng,Chenglin Li,Daoquan Tang,Xiaoxing Yin
This work demonstrated an effective strategy for the capture, identification and determination of multiple types of circulating tumor cells (CTCs) on functional and biocompatible immunomagnetic nanosphere interfaces (IMNs). The IMNs were achieved by functionalizing superparamagnetic iron oxide nanospheres (Fe 3 O 4 ) with polymerized ionic liquid (PIL), and then coating with epithelial-cell-adhesion-molecule antibody (anti-EpCAM). The IMNs exhibited outstanding cell capture efficiency (above 95%) and specificity when employed to separate multiple EpCAM-positive tumor cells, due to the abundant carboxyl groups in the structure of PIL, which enhanced the coupling efficiency of MNs with anti-EpCAM by chemical bonding between carboxyls and amines, thereby enabling more target cells adhered onto IMNs. Under the optimized capture conditions, IMNs were shown an excellent cell capture performance in the range of 5–400 cells/mL in three different cases (e.g., PBS, MCF-7 and THP-1 mixed cell suspension, lysed blood). More significantly, our results indicated that with modification of PIL, in addition to the capture efficiency, the cell viability rate of CTCs was also greatly improved (98%) owing to the nontoxic and biocompatible properties of PIL, which realized the proliferation of the rare number CTCs for further molecular characterization. Finally, the IMNs were successfully applied to the isolation and detection of CTCs in cancer patient peripheral blood samples and as low as one CTC in the whole blood was captured and identified by the ICC method.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 2
·1171-1183
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IF 2.993
Tang Weiwei,Wang Baogang,Li Junting,Li Yangzheng,Zhang Yin,Quan Hongping,Huang Zhiyu
Carbon dots (CDs) were facilely synthesized by one-pot pyrolyzing a lactic acid-ionic liquid (IL) gel with a relatively high yield of 34.9 wt%. The CDs, with a mean particle size of 4.4 nm and high thermal stability, were almost amorphous and capped by IL groups. The CDs-IL in water exhibited an obvious excitation-, concentration-, pH-dependent and high salt-tolerant photoluminescence property. Specifically, the CDs-IL emitted the strongest blue fluorescence at 454 nm under 365 nm excitation with a quantum yield of 16%. In addition, the CDs-IL, as a kind of water-based lubricant additives, greatly improved the tribological properties of base liquid. The loading capability of base liquid for steel–steel pair increased from 50 N to at least 80 N when only 0.015 wt% of CDs-IL was added. Meanwhile, the mean friction coefficient and wear volume of base liquid reduced by 57.5% and 64% at the load of 40 N, respectively. In addition, the friction-reducing and antiwear performance of CDs-IL was far superior to the CDs and IL, reflecting a synergetic lubrication effect between the IL groups and carbon cores. Based on the worn surface analyses, the CDs were prone to be squeezed out of the rubbing surfaces during the boundary shear friction process, while the CDs-IL were prone to quickly form ordered absorption layers on rubbing surfaces by electrostatic interaction between the IL groups and steel surface, which is of key importance for the formation of effective lubrication film to largely reduce friction and wear.
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高影响因子
Journal of Cleaner Production
·
2018
·
IF 5.651
Chen Fan,Hongqiang Dong,You Liang,Jiale Yang,Gang Tang,Wenbing Zhang,Yongsong Cao
Cyhalothrin is lethally toxic to aquatic organisms and has caused adverse effects in the hydrosphere . It is urgent to develop efficient and sustainable material for its removal. High-quality HKUST-1 was rapidly synthesized by cholinium ionic liquids (ILs) in water at room temperature. Yields of HKUST-1 showed obviously positive correlation with Hammett values of ILs. When applying CuCl 2 as a copper salt, the yield of products was reached up to 95.5%, which was much higher than that of reported research. The reaction could be readily scalable with high space-time yield (242512 kg m −3 d −1 ). Additionally, ZrO 2 @HKUST-1 composite was successfully synthesized through a sol-gel method without complicated heat treatment. The whole process eliminates the use of environmentally unfriendly solvents/amines and enables the production of material at a reasonable cost. The obtained HKUST-1 and ZrO 2 @HKUST-1 possessed large pore volume (0.88–0.95 cm 3 g −1 ) and high surface area (1152–1484 m 2 g −1 ). The composite material was used for the adsorption/degradation of cyhalothrin and showed superior photocatalytic activity under moderate visible light, as compared to pure ZrO 2 , HKUST-1 and commercial TiO 2 samples. ZrO 2 @HKUST-1 displayed the high cyhalothrin adsorption capacity of 333 mg g −1 through π−π stacking, which facilitated more target molecules to contact the composite in a short time. ZrO 2 incorporating with HKUST-1 protected ZrO 2 nanoparticles from rapid agglomeration, thus narrowed the band gap of the composite. Moreover, the formation of a junction between HKUST-1 and ZrO 2 effectively reduced the recombination of photoinduced carriers in composite. Therefore, the novel ZrO 2 @HKUST-1 composite can be used as a sustainable efficient heterogeneous photocatalyst for the removal of organic pollutant.
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高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Hongli Shi,Ruiying Wang,Mengran Lou,Dianzeng Jia,Yong Guo,Xingchao Wang,Yudai Huang,Zhipeng Sun,Tao Wang,Luxiang Wang
A novel tri-component hybrid, Pt/pyridine ionic liquid polyoxometalate/reduced graphene oxide denoted as Pt/(epy) 3 PMo 12 O 40 /rGO with well-dispersed, smaller size Pt nanoparticles on rGO is successfully synthesized. The morphology, structure, composition and electrochemical property are characterized by high resolution transmission electron microscopy , X-ray diffraction, X-ray photoelectron spectroscopy, energy dispersive spectrometer, Raman spectra , thermogravimetric analysis and cyclic voltammetry , respectively. Ionic liquid polyoxometalate (epy) 3 PMo 12 O 40 availably prevents the aggregations of Pt nanoparticles on the rGO surface, furthermore, effectively improves anti CO poisoning performance and enhances the conductivity of the material. The mass activity of as-prepared Pt/(epy) 3 PMo 12 O 40 /rGO catalyst for methanol oxidation is about 10 times of 20% commercial platinum carbon, 7 times of Pt/rGO, 4 times of Pt/epyBr/rGO, and 2 times of Pt/H 3 PMo 12 O 40 /rGO. This further demonstrates that the ionic liquid polyoxometalate (epy) 3 PMo 12 O 40 play a very important role in enhancing the eletrocatalytic activity of the tri-component hybrid composite catalyst.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 76
·62241-62247
·
IF 3.84
Yibo He,Chao Wan,Qinghua Zhang,Xiaoli Zhan,Dang-guo Cheng,Fengqiu Chen
Friedel–Crafts alkylation of benzene with 1-dodecene, which is an important reaction of synthetic detergent, was studied using the catalyst [bmim][TFSI]/AlCl3 (1-butyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide/AlCl3). These ionic liquid catalysts show biphasic behaviors at a specific condition. Active site species and Lewis acidity were determined by NMR and acetonitrile probe FT-IR. NMR spectroscopy investigations indicated that “coordinated” and “uncoordinated” [TFSI]− existed in the ionic liquid catalyst system simultaneously, while tetrahedral 4-coordinate Al2Cl7− was the main active species for Friedel–Crafts alkylation. The complex [AlClx(TFSI)y]− tends to decompose and release 4-coordinated Al2Cl7− and [TFSI]−. The phase behavior study of the ionic liquid [bmim][TFSI]/AlCl3 demonstrated that the upper phase could be used as an efficient heterogeneous catalyst when AlCl3/IL ≥ 1.5. Due to the presence of the anion [TFSI]− around the active sites, especially [TFSI]− at the “uncoordinated” state, the ionic liquid formed a stable and hydrophobic chemical environment, which enhanced catalyst durability. The influence of various reaction conditions including catalyst reusability on the alkylation reaction was studied, and the potential reasons for catalyst deactivation were discussed. The highest 2-LAB selectivity was more than 50% when 1-dodecene conversion was nearly 100%. Compared with liquid or solid acid catalyst, ionic liquid catalysts have many advantages concerning energy and the environment.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 54
·43528-43536
·
IF 3.84
Suhang Xun,Wenshuai Zhu,Dan Zheng,Hongping Li,Wei Jiang,Ming Zhang,Yuejiao Qin,Zhen Zhao,Huaming Li
High activity oxidation of sulfur compounds to sulfones in extraction coupled with catalytic oxidative desulfurization (ECODS) system catalyzed by supported ionic liquid [Bmim]FeCl4/Am TiO2 was reported. The catalysts were analyzed by thermogravimetric (TG) analysis, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). It was found that [Bmim]FeCl4 and Am TiO2 had a synergistic effect on the desulfurization system. Effects of calcination temperature of the catalyst and various reaction conditions on the catalytic activity of desulfurization were investigated. Moreover, GC-MS analyses were employed to prove the process of the desulfurization. As a solid catalyst, the supported ionic liquid could be separated from the reaction easily. The recycling tests showed that the desulfurization efficiency remained 100% after reusing it for 25 times. Therefore, the ECODS system has excellent reusability and is promising for industrial applications for catalytic oxidative desulfurization.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 71
·57640-57646
·
IF 3.84
Baohua Zhang,Xiuqin Zhan,Pengyu Zhao,Zhonghao Li
Ionic liquids provide chemists with a versatile platform and many opportunities for constructing various interesting inorganic materials. Here, an ionic liquid-mediated synthesis route is proposed for the controlled synthesis of PtPd bimetallic particles. The synthesized PtPd particles have unique three dimensional nanostructures (3D) constructed by nanoparticle subunits. For the 3D nanostructures, the primary PtPd particles form aggregates with the characteristic of interparticle porosity. Among others, the Pt1Pd1 bimetallic particles exhibit superior electrocatalytic activity toward oxidation of methanol in an alkaline medium than the commercial state-of-the-art Johnson-Matthey platinum black catalyst (Hispec™ 1000). Furthermore, the catalytic activity towards p-nitrophenol reduction indicates that the synthesized Pt1Pd3 particles exhibit the highest catalytic activity in comparison with the studied various PtPd bimetallic particles, the monometallic Pt and the monometallic Pd particles. This study may pave the way for the efficient synthesis of three dimensional bimetallic nanostructures for improved catalytic applications.
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高影响因子
TALANTA
·
2015
·
IF 3.545
Yuanyuan Feng,Mian Wu,Faqiong Zhao,Baizhao Zeng
A novel polycarbazole (PCz)–ionic liquid (IL, i.e. 1-hydroxyethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide, [HOEMIm][NTf 2 ]) composite coating (PCz-IL) was fabricated by electrodeposition. The IL could facilitate the electrodeposition of poor-conductive PCz and a more porous coating was obtained. The composite coating exhibited enhanced extraction capacity for some environmental pollutants (i.e. o-chlorotoluene, p-bromotoluene, o-nitrotoluene, m-nitrotoluene, p-nitrotoluene), as they could interact through π-π and hydrophobic interactions. Compared with [HOEMIm][NTf 2 ] coated fiber, some other PCz-IL fibers (here IL=1-hydroxyethyl-3-methylimidazolium hexafluorophosphate and 1-methyl-3-octylimidazolium hexafluorophosphate) and commercial fibers (i.e. polydimethylsiloxane and polyacrylate), the PCz-IL fiber showed better performance. It was used for the determination of the environmental pollutants by coupling with gas chromatography, the limits of detection were 47.8–65.9 ng L −1 under the optimized conditions and the linear ranges were 0.1–500 μg L −1 with correlation coefficients above 0.9947 for different compounds. The relative standard deviations (RSDs) were 3.4–4.6% for five successive extractions with single fiber, and the RSDs for inter-fiber were 6.5–10.4% ( n =5). The fiber was successfully applied to the detection of real samples and the recoveries for standards added were 88.6–108.8% with RSDs below 9.7%.
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高影响因子
危险品化学品经营许可证（带存储）