JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 134
·期 11
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IF 1.866
Lei Huang,Yufen Jin,Li Sun,Feng Chen,Ping Fan,Mingqiang Zhong,Jintao Yang
Poly(ionic liquid)s have been demonstrated as high efficient CO 2 absorbents. In the current study, a kind of poly(ionic liquid)s, Poly[2-(methacryloyloxy)-ethyl] trimethylammonium tetrafluoroborate (P[MATMA][BF 4 ]) was used to functionalize graphene oxide (GO). The hybrid in which P[MATMA][BF 4 ] was covalently bonded on GO platelets was prepared by a simple method, that is, traditional radical polymerization. The characterizations based on transmission electron microscopy, scanning electron microscope, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy demonstrated the graft of P[MATMA][BF 4 ] on GO. N 2 adsorption measurements indicated that P[MATMA][BF 4 ] also greatly increased the specific surface area of GO. Due to the higher specific surface area and the CO 2 affinity of P[MATMA][BF 4 ], the GO-P[MATMA][BF 4 ] hybrid exhibited a much higher CO 2 adsorption capacity compared with GO, GO-NH 2 , and P[MATMA][BF 4 ]. Their study showed that the combinations of poly(ionic liquid)s and GO could be promising CO 2 absorbents. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44592.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2018
·Vol. 94
·期 1
·159-166
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IF 2.587
Jun Li,Miaoliang Fan,Rongjin Zhang,Zheyu Tian,Jing Zeng,Yinan Song,Wenting Du
Background Ionic liquids (ILs) have advantages in terms of flexible structure and composition for the whole cell mediated biocatalytic reaction. However, the lack of design strategy for ILs has hampered the development of biocatalysis in non-aqueous medium. In the present study, to establish an efficient reaction system to obtain vital chiral compounds, a novel IL was designed by combining the superior characteristics of quaternary ammonium- and dialkyl-based cationic surfactant IL to enhance the recombinant Escherichia coli cells-catalyzed bioreduction efficiency. Results [HOEtN1,1,1][BF 4 ] was synthesized and showed excellent characteristics of low toxicity to the biocatalyst, reduced toxicity of substrate to the microbial cells and moderate increase of cell membrane permeability. In the [HOEtN1,1,1][BF 4 ]- containing reaction system, some valuable factors involved in the biocatalytic reduction of ethyl 4-chloro-3-oxobutanoate to ethyl ( S )-4-chloro-3-hydroxybutanoate were found to be: 2.5% (w/v) [HOEtN1,1,1][BF 4 ], 20% (v/v) isopropanol, 3 M COBE, pH 7.0, 30 °C, reacted for 16 h. A yield of 96.7% was obtained under the optimum conditions with above 99% enantiomeric excess value, and the proposed bioprocess was also successfully scaled up to a 5 L fermentor with a yield of 90.7%. Conclusion The developed IL [HOEtN1,1,1][BF 4 ] is a promising solvent for enhancing the efficiency of model bioreduction. It was also evaluated for broadening its application to the biosynthesis of ( R )-[3,5-bis(trifluoromethyl)phenyl] ethanol catalyzed by recombinant Escherichia coli , with remarkable success. © 2018 Society of Chemical Industry
研究领域:
化学工程
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生物技术
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有机化学
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DOI
高影响因子
RSC Advances
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2018
·Vol. 8
·期 4
·1987-1992
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IF 2.936
Mei Wang,Mingming Wang,Na Rao,Jiale Li,Jianfen Li
Alcohol amine solutions have a high absorption capacity and rate for CO2 capture, however, there are some shortcomings such as high energy-consumption and low stability. To enhance CO2 capture performance of aqueous MEA, a functional ionic liquid ([NH2e-mim][BF4]) was introduced based on the advantages for CO2 capture. Absorbents were prepared with the molar concentration ratio of [NH2e-mim][BF4] to the 30 vol% aqueous MEA of 0 : 10, 1 : 9, 2 : 8, 3 : 7, 4 : 6 and 6 : 4. The density and the viscosity of the investigated absorbents were measured and the effects of the molar fraction of [NH2e-mim][BF4] (nI) and temperature on CO2 absorption performance were investigated. CO2 desorption performance of the solvent at different temperatures was discussed. The stability performance of the absorbent with nI of 2 : 8 (I/M2:8) was examined by five consecutive cyclic tests. The results showed that for pure CO2, the I/M2:8 displayed the highest absorption performance at 303 K under 1 bar: a comparable CO2 absorption capacity of the 30 vol% aqueous MEA and a higher CO2 absorption rate at the later absorption stage. Moreover, with the increase of temperature, CO2 absorption capacity and rate decreased, while CO2 desorption efficiency and rate increased. 393 K was chosen as the optimum desorption temperature with the desorption efficiency of 99.31%. The introducing of IL contributed to CO2 desorption performance of the absorbents significantly. The properties (CO2 absorption capacity, mass loss, density and viscosity) of the I/M2:8 during the cycles suggested that the IL-MEA mixture had an excellent stability performance.
研究领域:
化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
Micromachines
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2021
·Vol. 12
·期 12
·1461
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IF 2.891
Chenyu Xiong,Yun Hui,Ri Wang,Chao Bian,Yuhao Xu,Yong Xie,Mingjie Han,Shanhong Xia
Trace mercury ion (Hg2+) detection is important for environmental monitoring and water safety. In this work, we study the electrochemical strategy to detect trace Hg2+based on the preconcentration of temperature-controlled N-octylpyridinium tetrafluoroborate ([OPy][BF4]) dispersive liquid–liquid microextraction. The [OPy][BF4] selectively extracted Hg2+from aqueous solution by the adsorption of unsaturated N in [OPy][BF4], which increased the concentration of Hg2+and decreased that of other interference ions. It was noted that the adsorption of [OPy][BF4] to Hg2+was weakened by aqueous solution. Hence, after extraction, precipitated [OPy][BF4] was diluted by a buffer solution comprising a mixture of water and acetonitrile to release Hg2+and the single was detected by electrochemistry. Water is proposed to release Hg2+adsorbed by [OPy][BF4], and the acetonitrile serves as a co-solvent in buffer solution. Sensitivity and anti-inference ability of sensors were improved using the proposed method and Hg2+releasing procedure. The detection limit (S/N = 3) of the sensor is 0.0315μg/L with a linear range from 0.1 to 1μg/L. And the sensor exhibits good recovery with an range from 106 % to 118%, which has great potential for trace Hg2+determination.Keywords:mercury ions detection;electrochemical sensor;ionic liquid;liquid–liquid extraction
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
Journal of the American Chemical Society
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2014
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IF 11.444
Heng-Yun Ye,Shen-Hui Li,Yi Zhang,Lei Zhou,Feng Deng,Ren-Gen Xiong
Many order–disorder-type phase transitions in molecule-based ferroelectrics are related to changes of molecular dynamics. If the molecular motions do not involve reorientations of dipole moments, their ordering fails to contribute directly to spontaneous electric polarization. For understanding ferroelectric mechanisms in these systems, it is important to clarify how such molecular dynamics changes induce structurally symmetry-breaking phase transitions and thus the appearance of spontaneous electric polarization. Systematic characterization of an [18]crown-6 based host–guest inclusion compound, [(DIPA)([18]crown-6)]BF4 (DIPA = 2,6-diisopropylanilinium), shows it is an excellent ferroelectric with a large dielectric anomaly, significant pyroelectricity, and SHG response, and rectangular polarizaiton–electric field hysterisis loops. By the combination of variable-temperature single-crystal structural determination and solid-state NMR observation, it is found that the slowing down of the rotation of the [18]crown-6 molecule and the tumbling of the BF4 anion causes the symmetry breaking, while the spontaneous polarization is induced by the relative displacement between the cationic and anionic sublattices. This investigation will contribute to a deeper understanding of the structure–property relationship in the emerging molecular ferroelectrics.
研究领域:
材料科学
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物理化学
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DOI
PubMed
高影响因子
Materials Research Express
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2020
·Vol. 7
·期 1
·016437
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IF 1.929
Linchen Liao,Caifeng Chen,Jilong Qian,Youming Zhang,Ruifang Zhang,Jiaguang Zhu
PVDF/IL piezoelectric film based on [Emim]BF4-added was prepared by near electric field direct writing. The β-phase content and its electric property of the film were analyzed. The results showed that the content of β crystal phase of PVDF film was improved by the synergistic effect of IL ([Emim]BF4) and near electric field. When the amount of [Emim]BF4 added was 1.5 wt%, the relative β-phase content of PVDF film reached 85.09%, and the crystallinity is 47.84%. Increase in [Emim]BF4 content resulted in a significant increase in the relative dielectric constant of the film, from 6 to 285, but also accompanied by a sharp increase in dielectric loss. The d33 value of the film can be as high as −10 pC/N, and the output voltage from the cantilever beam vibration feedback indicates that the voltage strength of the [Emim]BF4-added film is greatly improved compared with the pure PVDF film.
研究领域:
材料科学
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物理学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
·
IF 6.9
Yuewen Chen,Tao Zheng,Hai Liu,Weidong Xie,Jiali Huang,Yimin Wang,Xiya Zhang,Zhen Yuan,Zhile Xiong
The electrocatalytic reduction of CO 2 to CO represents an important approach for carbon resource utilization. However, most existing catalysts still suffer from low activity and poor selectivity. In this work, a novel “domain-confined interface” synergistic catalytic system was constructed by integrating ionic liquid [BMIM][BF 4 ] with zeolitic imidazolate framework-8 (ZIF-8) to enhance the CO 2 reduction reaction (CO 2 RR) performance. The high specific surface area and microporous structure of ZIF-8 provide an ideal platform for CO 2 adsorption and activation, while [BMIM][BF 4 ] improves the local microenvironment of the catalytic interface, thereby boosting the catalytic activity. Experimental results indicate that the incorporation of the ionic liquid significantly enhances the CO 2 RR performance of ZIF-8 at low potentials. The Faradaic efficiency for CO (FE CO ) increases from 38.98 % to 75.25 % at −0.8 V versus the reversible hydrogen electrode (RHE). Moreover, at the optimal potential of −1.2 V (vs. RHE), FE CO reaches 96 % and remains stable during an 8-hour durability test, outperforming most reported ZIF-8-based catalysts. This work may provide useful insights for the design of efficient CO 2 RR electrocatalysts.
研究领域:
电催化
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材料科学
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二氧化碳利用
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可持续能源
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2023
·Vol. 52
·期 23
·8142-8154
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IF 4
You-Hui Zhao,Hai-Yan Li,David James Young,Xiangqian Cao,Da-Liang Zhu,Zhi-Gang Ren,Hong-Xi Li
Earth-abundant copper(I) coordination complexes of an imine-phosphine and a diimine have been developed as visible-light photocatalysts. Reaction of [Cu(MeCN)4]BF4 with hetero-bidentate phosphinopyrazole (phpz) ligand R1R2C3HN2PPh3 (R1 = R2 = H (1a); R1 = H, R2 = Me (1b); R1 = H, R2 = Ph (1c); R1 = R2 = Me (1d)) and 2,9-dimethyl-1,10-phenanthroline (dmp) gave four heteroleptic bis-chelate Cu(I) complexes [Cu(dmp)(R1R2C3HN2PPh3)]BF4 (R1 = R2 = H (2a); R1 = H, R2 = Me (2b); R1 = H, R2 = Ph (2c); R1 = R2 = Me (2d)) with distorted tetrahedral geometries. Complexes 2a–2d exhibited broad absorption in the visible spectrum and could facilitate photochemical intermolecular atom-transfer radical addition reactions of CBr4, or CCl3Br, CHI3 to styrenes in yields up to 91% and with a broad substrate scope. The absorption, emission, redox potential and photocatalytic activity were dependent on the substituents on the phpz ligand. Mechanistic studies supported an atom-transfer radical addition (ATRA) mechanism.
研究领域:
无机化学
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光化学
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催化
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DOI
高影响因子
ACS Applied Electronic Materials
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2025
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IF 4.7
Jiangnan Yan,Jianing Ding,Hongyu Yi,Yifan Gao,Kongyu Ge,Hongjun Ji,Mingyu Li,Huanhuan Feng
Electronic skin (e-skin) holds significant potential for applications in health monitoring, human–machine interface, and motion recognition. However, conventional e-skins often exhibit decreased sensitivity and delayed response in low-temperature environments due to the freezing of conductive materials. To solve this, a flexible e-skin suitable for low-temperature environments was fabricated by selecting the ionic liquid [BMIM]BF4 as the conductive medium. Unlike liquid metals and hydrogels, ionic liquids can serve as conductive media with ultralow melting points and high conductivity by selecting appropriate cation–anion combinations. The [BMIM]BF4 we selected maintains high conductivity even with an ultralow melting point of −71 °C, which enables the fabricated flexible sensors to exhibit outstanding pressure-sensing performance under low-temperature environments. The e-skin can accurately respond to pressure loads (100–10,000 Pa), with linear resistance response. In addition, the e-skin maintains stable sensing performance in various curved environments and retains its normal sensing capability for external loads at temperatures as low as −50 °C. Furthermore, it possesses excellent dynamic sliding trajectory recognition capabilities, enabling the simultaneous identification of trajectories from multipoint sliding. To further enhance the three-dimensional microscale sensing capabilities of the e-skin, micropyramids were introduced onto its surface. The micropyramid-decorated e-skin can accurately achieve real-time dynamic detection of height at −10 °C, with a detection error of less than 2%. Therefore, the e-skin can accurately recognize microscale three-dimensional surface morphologies at −10 °C. Moreover, this e-skin can be applied in the field of Braille detection. It exhibits good recognition and reading capabilities for standard Braille currently in use and can identify various complex Braille letters.
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2020
·Vol. 28
·期 10
·12909-12917
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IF 3.056
Ren Jingyu,Li Jie,Lv Lei,Wang Jian
Ionic liquids (ILs) are a kind of promising extractants for removing undesirable organics from industrial wastewater and crude oil, etc. Herein, IL regeneration by ozonation was proposed for its recycling. 1-Butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF 4 ) and phenol were used as the representative IL and organic matter, respectively. The regeneration performance, stability of [Bmim]BF 4 , and roles of hydrogen bonds between O 3 and [Bmim]BF 4 in the phenol removal were studied. The experimental results showed that 90.2% of phenol was degraded in [Bmim]BF 4 after ozonation treatment for 30 min with the O 3 concentration of 1.2 mg/L. The nonvolatility of [Bmim]BF 4 -made phenol was adequately degraded, while the concentration of phenol increased during ozone treatment in the conventional extractants (ethanol, ethyl acetate, and dichloromethane) due to their high volatility. The reuse experiments, spectra of Fourier transform infrared spectroscopy and 1 H nuclear magnetic resonance spectroscopy indicated that [Bmim]BF 4 was steady under the ozonation process. Density functional theory simulation confirmed that hydrogen bonds between [Bmim] + and O 3 could be formed, and calculational results of Hirshfeld charges indicated that the nucleophilicity of O 3 was enhanced by the hydrogen bonds. The enhanced nucleophilicity resulted in the increase of phenol degradation efficiency by ozonation, and the synergistic effect between O 3 and ILs was proportional to the hydrogen bond donor ability of ILs.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Ke Xing,Weibin Chen,Yusheng Song,Yijie Wang,Lei Song,Sihang Ji,Jialong Zhao,Xi Yuan,Yu Zhang
Surface treatment with NaBF 4 effectively reduces surface defects of CsPbBr 3 nanocrystals. • Anions in NaBF 4 replace original carboxylate ligands via strong coordination with surface cations. • NaBF 4 -treated CsPbBr 3 nanocrystals achieve high PLQY of 93.71% and good stability. • NaBF 4 -treated PeLEDs show CIE coordinates of (0.10, 0.73), meeting Rec.2020 standard. Surface defect passivation is critical for improving the luminescence performance and stability of CsPbBr 3 perovskite nanocrystals (NCs) toward high-performance perovskite light-emitting diodes. Herein, a facile and efficient room-temperature surface treatment strategy using NaBF 4 is proposed to synergistically enhance the optical properties and environmental stability of CsPbBr 3 NCs prepared via a modified ligand-assisted reprecipitation method. Through the strong coordination interaction between F atoms in BF 4 − anions and surface Pb 2+ ions, the weakly bound carboxylate ligands are replaced, effectively passivating surface defects without altering the cubic perovskite crystal structure. Consequently, the photoluminescence quantum yield is remarkably improved from 72.44% to 93.71%. Moreover, the treated NCs exhibit significantly enhanced thermal stability with PL intensity retention of 65.55% at 350 K, ethanol tolerance with 89.51% retention after 360 min, and photostability under continuous UV irradiation. PeLED devices based on the treated NCs achieve a maximum brightness of 7536 cd/m 2 and an external quantum efficiency of 6.50%, with emission centered at 514 nm and CIE coordinates of (0.10, 0.73) satisfying the Rec. 2020 ultra-wide color gamut standard. This work demonstrates that NaBF 4 surface treatment provides a practical and viable pathway toward high-performance and long-lifetime PeLEDs. Download: Download high-res image (148KB) Download: Download full-size image
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DOI
高影响因子
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.
研究领域:
化学工程
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）