FOOD CHEMISTRY
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2022
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IF 9.231
Jilong Li,Fengze Wu,Yupu Zhang,Ji Feng,Xiujuan Wang,Yi Yang,Zhibing Wang,Hanqi Zhang
In this study, a novel supramolecular solvent based on surface-active ionic liquid was prepared and used as an extraction solvent for dispersive liquid–liquid microextraction of four triazine herbicides in tea samples. The formation mechanism, microstructure and physicochemical properties of supramolecular solvent were studied. Some parameters, including the molar ratio of surface-active ionic liquid to tetrahydrofuran, volume of supramolecular solvent, vortex time, pH of sample solution, type and amount of salt, were investigated and optimized. The good linearities (r > 0.9990) for the analytes were obtained. The limits of detection and quantification for triazine herbicides were in the range of 1.7–2.1 μg kg −1 and 5.6–7.1 μg kg −1 , respectively. The spiked recoveries were 80.0–119.9 %. The supramolecular solvent prepared in this study has the advantages of simple preparation process, low viscosity and good dispersibility. It can be used for the extraction and enrichment of trace triazine herbicides in tea samples.
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高影响因子
FUEL
·
2022
·
IF 8.035
Lili Gao,Langlang Qin,Haonan Wu,Xuelian Li,Kai Qi,Qun Yi,Jiandong Zhang,Lijuan Shi
Electrochemical reduction of CO 2 (CO 2 ER) to high value-added multicarbon (C 2+ ) is a viable way to promote carbon–neutral cycle. To date, copper (Cu) is reported as the most effective metal catalyst toward C 2+ , but it remains a challenge to achieve high selectivity and large current density. Incorporating ionic liquid in Cu-based catalysis has been proved an effective strategy, however, most reported methods are either involved too much ionic liquid (IL) as electrolyte or too complex & unstable. Herein, an ionic liquid-embedded Cu electrocatalyst (Cu-IL/GDL) was innovatively constructed through one-step electro-codeposition method, in which a kind of amino-ionic liquid, AFIL, was anchored to the gas diffusion layer (GDL) and embedded by the deposited Cu. Under the excellent synergy between Cu and AFIL, Cu-IL/GDL exhibits higher faradaic efficiency toward ethylene (C 2 H 4, 40.67%) and C 2 (C 2 H 4 and C 2 H 5 OH, 61.39%) when directing CO 2 to carbon-fiber side of electrode in H-cell. To be precise, more Cu (1 0 0) facet is stabilized by the capping effect of AFIL, being in favor for C–C coupling; meanwhile more AFIL + is embedded by the deposited Cu, making for the initiation of CO 2 ER. Thus, this paper proposes a facial and effective strategy to reinforce Cu (1 0 0) facet, and couple and heighten the virtues of ionic liquid and Cu during CO 2 ER toward C 2 .
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Bin He,Shengxin Chen,Yuandong Cui,Xinyan Chen,Yu Lei,Jian Sun
Graphitic carbon nitride (g-C 3 N 4 ) has been considered as a promising organic semiconductor for photochemistry but under great challenges of severe recombination rate of photogenerated electron-hole pairs, the weak ability of light harvesting, and other inherent defects. Herein, uniformed hollow polymeric ionic liquid spheres with layer gradients of electron structure were developed innovatively combining with g-C 3 N 4 nanosheets driven by sonication and electrostatic forces. These two components can form a novel system due to the distinction of electron between poly(ionic liquids) (PILs) and g-C 3 N 4 . The novel as-developed PILs- x loaded on the g-C 3 N 4 surface benefits the transfer and supplement of photoinduced electrons resulting from the effects of “electronic reservoir”. Meanwhile, the light harvesting of the PILs- x /g-C 3 N 4 is also enhanced significantly. In addition, the “ion modulated effect” was studied by tuning the species of anion in PILs structure, achieving controllable regulation of photocatalytic activity. Benefiting from the above fascinating properties, the PILs- x /g-C 3 N 4 system exhibit a significantly enhanced hydrogen evolution efficiency with Pt as co-catalyst under visible light irradiation compared with the Pt/PCN. This study opens a new sight to strengthen the photocatalytic activity of g-C 3 N 4 by using functional hollow PILs with layer gradients of electron structure for various applications in energy and environmental fields.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Yangyang Wang,Xiaoxia Liu,Annie Yang,Ping Lv,Lixin Zhang,Yongnian Li,Yanzhao Yang
Selective recovery of gold and platinum from secondary resources is of great significance under the crisis of resource shortage. Hence, the optimal extractant 1-(2-(dimethylamino) ethyl)-4-methyl-piperazin bis(trifluoromethylsulfonyl)imide ([C 6 -Et-TMEDA-PIP][Tf 2 N] 2 ) was synthesized and screened out from five piperazine-based ionic liquids (ILs) to construct an IL-water system for Au(III) and Pt(IV) extraction. ILs have high hydrophobicity and low viscosity at room temperature, which can be used as both extractant and hydrophobic phase. The effects of IL dosage, metal concentration and acidity on the extraction efficiency were investigated. Under the optimal conditions, the extraction efficiency of 98.5% (Au(III)) and 97.5% (Pt(IV)) can be achieved. The anion exchange mechanism was verified through the combination of Ultraviolet visible spectroscopy (UV–vis), Nuclear magnetic spectra (NMR) and quantum chemical calculations. Besides that, the two-factor optimization of the extractant dosage and HCl concentration was carried out by Response surface methodology (RSM), and the effective separation of Au(III) and Pt(IV) was successfully achieved. Au(III)/ Pt(IV) was extracted into the IL phase as [Et-TMEDA-PIP + ][AuCl 4 - ] and can easily be stripped by reduction to Au(0)/Pt(Ⅱ) with H 2 C 2 O 4 /CS(NH 2 ) 2 -HCl, and each extraction ability maintained after 5 turns of extraction cycle experiments. Since the excellent behaviors showed in the multi-metal selective extraction and cycle experiments, the [C 6 -Et-TMEDA-PIP][Tf 2 N] 2 was regarded as the most potential system for Au(III) and Pt(IV) recovery from HCI medium.
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Analytical Methods
·
2022
·Vol. 14
·期 10
·1023-1030
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IF 3.532
Hanxing Yang,Zhongguang Ji,Yanbo Zeng,Jian Zhang,Lifen Chen,Hailong Wang,Yiwen Yang,Longhua Guo,Lei Li
An aggregation-induced emission monomer-based fluorescent molecularly imprinted poly(ionic liquid) (AIE-FMIPIL) was synthesized for the first time with an AIE probe 4-(1,2,2-triphenylvinyl)phenyl acrylate (TPE), and an ionic liquid as dual functional monomers, and an ionic liquid as cross-linker. AIE-FMIPIL displayed a sphere-like shape and its average diameter was 410 nm. The absolute quantum yields of TPE and AIE-FMIPIL were 9.23% and 12.61%, respectively. The synergetic effect of TPE in the AIE-FMIPIL framework contributed to the higher quantum yield of AIE-FMIPIL. 4-Nitrophenol (4-NP) efficiently quenched AIE-FMIPIL with high fluorescence based on the Förster resonance energy transfer mechanism. The synthesized AIE-FMIPIL sensor was highly sensitive for 4-NP detection (linear range, 0.02–1.5 μM) in the optimal detection condition, with a low detection limit of 10 nM (S/N = 3). AIE-FMIPIL showed increased sensitivity and quenching efficiency compared with AIE-FMIP comprising a traditional monomer and cross-linker. AIE-FMIPIL exhibited selective binding to 4-NP because of the imprinted sites. AIE-FMIPIL was adopted to detect 4-NP in environmental samples.
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JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Chao Tang,Guowei Yang,Bing Wu,Guangjian Chai,Dian Qu,Chun Chen,Zhihong Yang,Jian Sun,Jianmei Xu,Zhiquan Chen,Qihang Wang,Wei Zhou
PIL modification tailors MOF-808 pore environment and CO 2 -affinitive sites. • PIL-modified MOF-808 improves filler-Pebax interfacial compatibility. • PALS reveals reduced FFV in PIL-modified MOF-808/Pebax MMMs. • The optimized MMM surpasses the 2008 CO 2 /N 2 Robeson upper bound. • CO 2 solubility gain outweighs diffusivity loss despite reduced free volume. Carbon capture is an important strategy for mitigating climate change, and membrane-based CO 2 separation offers advantages such as low energy consumption, operational simplicity, and continuous operation. Incorporating metal-organic frameworks (MOF), improving the interface between MOF and polymers, and introducing sites with CO 2 affinity are effective approaches for enhancing mixed matrix membranes (MMMs) performance. In this study, poly(ionic liquid) (PIL)-modified MOF-808 fillers were synthesized through in situ polymerization and incorporated into Pebax membranes. The PIL modification adjusted the pore environment of MOF-808, introduced imidazolium and -COOH groups, and strengthened interactions between the filler and Pebax, thereby restricting Pebax chain mobility. The optimized MMM exhibited a CO 2 permeability of 124.57 Barrer at 0.1 MPa and 35 °C, with CO 2 /N 2 selectivity surpassing the 2008 Robeson upper bound and CO 2 /CH 4 selectivity also substantially improved. Positron annihilation lifetime spectroscopy (PALS) revealed a reduction in fractional free volume compared with pristine Pebax, while time-lag analysis showed a corresponding decrease in gas diffusivity. In contrast, the CO 2 solubility coefficient increased markedly because of the CO 2 affinity introduced by PIL. The increase in CO 2 solubility was larger than the loss in diffusivity, leading to enhanced CO 2 permeability and selectivity despite reduced free volume. By combining PALS with time-lag analysis, nanoscale free volume evolution was connected with diffusion and solubility contributions. These results show that PIL-modified MOF-808 changes the balance between diffusivity and solubility in MOF/Pebax MMMs and clarify why CO 2 transport can be improved even when free volume and diffusivity decrease. Download: Download high-res image (432KB) Download: Download full-size image
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MICROCHEMICAL JOURNAL
·
2023
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IF 4.8
Liling Wang,Yanbin Wang,Yuchuan Qin,Yifeng Zhou
Waters contaminated with pesticides poses a potential hazard to ecosystems and human health, so sensitive and efficient analytical methods are essential for water monitoring. Herein, in order to efficiently extract six commonly used herbicides, a novel ionic liquid covalent organic framework (IL@COF) was prepared using a simple room-temperature synthesis in this study. As an adsorbent for solid phase extraction (SPE), the mesoporous material exhibits rapid adsorption performance for six typical herbicides from water samples. Under the optimal experimental conditions, wide linearities (500 ∼ 20,000 μg L –1 ) and low limits of detection (prometryn: 17.9 μg L –1 ; metribuzin: 36.7 μg L –1 ; bentazon: 14.5 μg L –1 ; isoproturon: 18.0 μg L –1 ; acetochlor: 19.6 μg L –1 ; butachlor: 37.1 μg L –1 ) for six analytes were obtained via high performance liquid chromatography (HPLC). The adsorbent has stable physical and chemical properties and can be reused for 10 times after effective elution. The applicability of this method is further evaluated by analyzing ten kinds of real water sample. The recoveries of six kinds of herbicides ranged from 85.3 % to 122.9 %. The mechanism of adsorption is the interaction between hydrogen bond acceptor and donor. These results indicate that HPLC after SPE with a new type of IL@COF as the SPE adsorbent is a promising technique for the simultaneous detection of six pesticides in environmental water samples.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lang Wu,Hong Qin,Songhua Zhou,Ziming Luo,Yang Xiao,Huan You,Qian Lin,Hongyan Pan,Keliang Wang
Direct synthesis of hydrogen peroxide (H 2 O 2 ) from hydrogen (H 2 ) and oxygen (O 2) is an ideal industrial method to replace the anthraquinone oxidation process for H 2 O 2 production, however, it is still limited by low H 2 O 2 selectivity and productivity. The electronic structure and wettability of the catalyst are crucial factors that affects the catalytic performance. This study demonstrates that binding hydrophobic 1-butyl-3-methylimidazolium-hexafluorophosphate ([Bmim]PF 6 ) ionic liquid on the surface of Pd nanoparticles (Pd NPs) can increase the content of electron-deficient state Pd (Pd 2+ ) at the active site, which exhibits excellent catalytic performance (90.8% H 2 O 2 selectivity and 8828.6 mmol g Pd −1 h −1 H 2 O 2 productivity). The results of XPS, O 2 -TPD and DFT show that the increase of Pd 2+ content effectively inhibits the O-O bond dissociation of O 2 *, OOH*, and HOOH*, thus improving H 2 O 2 selectivity and productivity. Moreover, the hydrophobicity of [Bmim]PF 6 induces a change in the three-dimensional hydrophilic microenvironment of the Pd active site, reducing the energy required for HOOH* desorption from the active site by 0.07 eV (from 0.53 eV to 0.46 eV). This is useful in preventing further hydrogenation and decomposition of HOOH*. TEM characterization suggests that the steric hindrance of [Bmim]PF 6 impedes the aggregation of Pd NPs during the reaction, resulting in different cyclic stability of Pd/OCNT and Pd [Bmim]PF 6 /OCNT.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xuemei Li,Yang Shen,Fangyu Jin,Jingbo Zhang,Yanyan Yang,Xiaoshu Qu
Nuclear waste management and nuclear energy generation require the proper disposal of 129 I and 131 I, which are radioactive isotopes of iodine. For recognition of different types’ iodine, a magnetic poly (ionic liquid)s (Fe 3 O 4 @SiO 2 -MPS-PILs) was formed by the selected imidazole ionic liquid monomer and core–shell Fe 3 O 4 @SiO 2 -MPS via free radical polymerization. The resulting adsorbent containing plenty of imidazole N-heterocycle units, benzene rings, and ionic bonds in the backbones was suitable for simultaneously adsorbing iodine molecules and iodide ions. The adsorption mechanisms for iodine in cyclohexane and iodide ions from aqueous solution were based on charge transfer and ion exchange mechanisms, respectively. The adsorption equilibrium for iodine in cyclohexane was attained at 12 h, and the kinetics of iodine adsorption closely followed the pseudo-second-order model. Iodine adsorption on Fe 3 O 4 @SiO 2 -MPS-PILs was best described by Langmuir model with a maximum iodine adsorption capacity of approximately 714.29 mg g −1 . Iodide ions adsorption was best explained with Freundlich model and a maximum adsorption capacity of 335.80 mg g −1 was achieved in an iodide solution with a 500 mg L –1 concentration. Notably, Fe 3 O 4 @SiO 2 -MPS-PILs retained over 90 % of its original adsorption performance after the 5th cycle. This work proves that the adsorbent Fe 3 O 4 @SiO 2 -MPS-PILs was efficient and recyclable, and has good application prospects in the practical treatment of iodine and iodide.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2021
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IF 7.46
Xiaoling Lei,Ziyi Deng,Yanbo Zeng,Shisi Huang,Yiwen Yang,Hailong Wang,Longhua Guo,Lei Li
A novel composite of conductive metal organic framework and molecularly imprinted poly (ionic liquid) (CMOF-MIPIL) was prepared for highly sensitive detection of bisphenol A (BPA). Ni-based CMOFs with various organic ligands, i.e., 2,3,6,7,10,11-hexaiminotriphenylene, hexa-aminobenzene, and 2,3,6,7,10,11-hexahydroxytriphenylene were synthesized. The electrochemical properties of the obtained Ni-based CMOFs were investigated. The results demonstrated that Ni 3 (HITP) 2 had the highest conductivity and largest effective surface area. CMOF-MIPIL was then prepared with Ni 3 (HITP) 2 as supporter, BPA as template, and ILs as monomer and cross-linker. Under optimal conditions, CMOF-MIPIL sensor exhibited a linear range of BPA detection from 0.005 to 5.0 μM. The detection limit was 4.0 nM. Compared with MIPIL, Ni 3 (HITP) 2 , and CMOF-NIPIL-based sensors, the performance of this sensor for BPA detection was superior due to the excellent conductivity and the presence of specific recognition sites. In addition, CMOF-MIPIL sensor had excellent selectivity for BPA. The proposed assay was used for detection of BPA in environmental water samples, plastic bottle and fresh liquid milk samples with success.
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JOURNAL OF MOLECULAR LIQUIDS
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2021
·
IF 6.165
Fukang Deng,Kangchun Li,Qing Feng,Kedi Yang,Fuchuan Huang
As the life expectancy increases, so do the wear and damage to joints caused by increased physical activity. In this regard, the development of biofriendly and nontoxic lubricating materials has important social and economic impact. Therefore, this work develops such a lubricant for joints using tea saponin derivative (TSC16) as the bio-lubricating additive to a choline/N-acetyl- l -proline ionic liquid (IL). The TSC16 molecules aggregated in the choline/N-acetyl- l -proline IL to form short fibrous structures, which increased the viscosity of the IL and improved the formation of a lubricating film on the applied area. The fibrous structure of TSC16 enhanced the strength of the lubricating film and improved the lubrication and anti-wear performance. Overall, the developed IL blend exhibits promise for tissue engineering applications.
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JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Fengxiang Liu,Shuang Wang,Di Wang,Geng Liu,Yinghe Cui,Dan Liang,Xiaodong Wang,Zhipeng Yong,Zhe Wang
Novel high temperature-proton exchange membranes (HT-PEMs) are prepared based on norbornene-type PBI (NbPBI) and double bond ionic liquids . For comparison, three ionic liquids are selected to prepare NbPBI-PIL membranes. Herein, the ionic liquids are synthesized into poly(ionic liquid)s (PILs) by in-situ free radical polymerization . Simultaneously, the PILs also react with the norbornene monomer of NbPBI to form a cross-linked network. After acid-base doping, the Br − or Cl − of PILs are successfully replaced with H 2 PO 4 − to promote proton transport. Notably, the NbPBI-PIL membranes exhibit high proton conductivity and enhanced phosphoric acid retention, especially the NbPBI-MPIm membrane has a proton conductivity of 0.074 S cm −1 at 170 °C and phosphoric acid retention of 87.2% and 73.8% under 160 °C and 80 °C/40 RH%, respectively. The single-cell with NbPBI-TPAm membrane obtains the highest power density of 385 mW cm −2 at 160 °C and negligible single-cell voltage decay after the 200-h test.
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危险品化学品经营许可证（带存储）