Journal of Materials Chemistry A
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2024
·
IF 10.7
Xi Chen,Wei Zhou,Xu Fang,Cheng Li,Die Cong,Tie Yu,Wei-Qiao Deng,Chengcheng Liu
Photocatalytic CO2 reduction to syngas has recently garnered substantial interest due to its mild reaction conditions, high safety, and environmental sustainability. However, the efficiency of syngas production remains relatively low. In this study, we have developed metallosalen-based poly(ionic liquid)s (PILs) to enhance syngas production, achieving one of the highest production rates recorded to date. The Co(Salen)-PIL demonstrates a syngas production rate of 168.1 mmol g−1 h−1, including a CO production rate of 69.3 mmol g−1 h−1, which is more than eight times higher than that of the best previously reported organic materials. Mechanistic investigations reveal that pyridine ions facilitate electron transfer from the heptazine light-harvester to the Co(Salen) active site. This study lays the groundwork for developing high-performance catalysts for photocatalytic syngas production.
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高影响因子
AICHE JOURNAL
·
2016
·Vol. 62
·期 11
·4023-4034
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IF 2.98
Mingxia Li,Zhiyong Zhou,Fan Zhang,Wenshuai Chai,Lele Zhang,Zhongqi Ren
Four benzyl-based ionic liquids (ILs) were synthetized and used for deep desulfurization of model oil and real diesel fuel. The removal efficiencies of benzothiophene (BT) and dibenzothiophene (DBT) with [Bzmim][NTf 2 ] and [Bzmim][SCN] as extractants are higher than that with [Bzmp][NTf 2 ] and [Bzmp][SCN] as extractants. The desulfurization capability follows the Nernst's Law. A reactive extraction mathematical model for desulfurization was established. An oxidative-extractive two-step deep desulfurization method was developed. DBT was first oxidized by H 2 O 2 with CH 3 COOH as catalyst and then the unoxidized DBT and uncrystallized dibenzothiophene sulfoxide (DBTO 2 ) in model oil were extracted by [Bzmim][NTf 2 ], and finally the removal efficiency was 98.4% after one-stage extraction. Besides, the removal efficiency of 4,6-DMDBT was 96.4% after oxidation and one-stage extraction processes. Moreover, the oxidative-extractive two-step deep desulfurization method was also effective for desulfurization of diesel fuel. The removal efficiency of sulfur reached up to 96% after oxidation and three-stage cross-current extraction processes. © 2016 American Institute of Chemical Engineers AIChE J , 62: 4023–4034, 2016
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高影响因子
SOLID STATE SCIENCES
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2016
·
IF 2.041
Yinyan Li,Shiqing Xu
Uniform and well-defined Lu 2 O 3 and Lu 2 O 3 :Eu 3+ microarchitectures have been successfully synthesized via a green and facile ionic liquid-based hydrothermal method followed by a subsequent calcination process. Novel 3D micro-rodbundles and 1D microrods of Lu 2 O 3 and Lu 2 O 3 :Eu 3+ were controllably obtained through this method. X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy and photoluminescence spectra were used to characterize the micromaterials. The proposed formation mechanisms have been investigated on the basis of a series of SEM studies of the products obtained at different hydrothermal durations. The results indicated that hydrothermal temperature and the ionic liquid-tetrabutylammonium hydroxide were two key factors for the formation as well as the morphology control of the Lu 2 O 3 and Lu 2 O 3 :Eu 3+ microarchitectures.
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INORGANIC CHEMISTRY
·
2016
·
IF 4.82
Pengcheng Hu,Rui Zhang,Xianghai Meng,Haiyan Liu,Chunming Xu,Zhichang Liu
Several amide–AlCl3-based ionic liquid (IL) analogues were synthesized through a one-step method using three different structure amides as donor molecules. The effects of the steric and inductive effects of the methyl group substituted on the N atom on the asymmetric splitting of AlCl3 and the coordination site of the amide were investigated by 27Al NMR, Raman, in situ IR, and UV–vis spectra for these IL analogues. Bidentate coordination through both the O and N atoms was dominant in the N-methylacetamide–AlCl3- and N,N-dimethylacetamide–AlCl3-based IL analogues because of the inductive effect of the methyl group. By contrast, the acetamide–AlCl3-based IL analogue presented mainly in the form of monodentate coordination via the O atom. Compared with monodentate coordination, bidentate coordination was favorable to the asymmetric splitting of AlCl3 with the same amide–AlCl3 molar ratio. Under the influence of the steric and inductive effects of the methyl group, the ionic species percentages in these IL analogues ranked in the following order: N-methylacetamide > N,N-dimethylacetamide > acetamide.
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PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2016
·Vol. 217
·期 23
·2626-2634
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IF 2.495
Haiyan Du,Xiaoxiao Liu,Yulong Yu,Yuyu Xu,Yonghong Wang,Zhenhai Liang
Recently, different stimuli triggered shape memory polymer composites (SMPC) have received much research interest. However, most shape memory effects (SME) in polymer composites are mainly caused by introducing different functional inorganic fillers into polymer matrix. In the present work, the special structure of poly(ionic liquids), the heating effect of microwaves (MW), and the mechanism of SMPs are combined to design MW induced SMPC completely based on polymers, poly(ionic liquid)/poly(vinyl alcohol) (PIL/PVA) polymer networks. PILs contain anion cation pairs, which have strong MW absorption capability due to their dielectric properties. Polymer composites absorb MW energy under irradiation and generate MW heating, which could provide the required energy for shape recovery. The functional ionic liquid monomer (MIL) styrene imidazole ([VBBI][BF 4 ]) is synthesized and polymerized. Then, PIL is mixed into PVA solution, which is crosslinked with glutaraldehyde to form P[VBBI][BF 4 ]/PVA polymer networks. 1 H NMR is used to characterize the structure of the synthesized styrene imidazole ILM and PIL. A bending test is applied to quantitatively characterize SMEs, which are affected by the PIL content in the composites and the applied MW power output. The present work combines the advantages of microwaves with PILs, opening up an efficient and environmentally friendly field for SMPs.
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JOURNAL OF MOLECULAR LIQUIDS
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2017
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IF 3.648
Chengyuan Liu,Wenting Chen,Zimo Wu,Bingliang Gao,Xianwei Hu,Zhongning Shi,Zhaowen Wang
The density, viscosity and electrical conductivity of AlCl 3 -amide (amide = urea, acetamide , propionamide , butyramide) ionic liquid (IL) analogues with varied molar fractions of AlCl 3 were measured at temperatures ranging from 313 K to 373 K. All the experimental values were fitted with the empirical equations. Meanwhile, the molar volume and molar conductivity of AlCl 3 -amide were also obtained. Based on the results, the difference in the properties of AlCl 3 -amide IL analogues are mainly attributed to the species of amide ligands, which have significant effects on complex structure, ionic interaction and hydrogen bonding of IL analogues.
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JOURNAL OF POLYMER RESEARCH
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2014
·Vol. 21
·期 2
·1-7
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IF 1.897
Zheng Tao,Ren Shitong,Zhou Qian,Li Qian,Zhang Liaoyun,Li Huayi,Lin Yuan
Hyperbranched poly(glycidol) (HPG) containing hydroxyl groups is firstly synthesized via anionic polymerization, and then reacts with thionyl chloride to form chlorine end-terminated hyperbranched poly(glycidol) (HPG-Cl). Different ionic liquid polymers are synthesized from the reaction of HPG-Cl with N-methylimidazole and then anion exchange with hexafluorophosphoric acid and sodium tetrafluoroborate. The structure and properties of the obtained ionic liquid polymers are characterized by 1 H NMR, ATR-FTIR, DSC and TGA, respectively. Ionic conductivity of the polymer electrolytes composed of ionic liquid polymer and lithium bis(trifluoromethanesulfonimide) (LITFSI) is investigated by electrochemical impedance spectroscopy. The results show that the ionic conductivity of the prepared ionic liquid polymer electrolyte can reach 3.5 × 10 −4 Scm −1 at 30 °C when the weight ratio of ionic liquid polymer ([HPG-MeIm]BF 4 ) to lithium salt (LiTFSI) is 4.5.
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COLLOID AND POLYMER SCIENCE
·
2014
·Vol. 292
·期 11
·2831-2839
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IF 2.41
Yang Yi,Gao Hejun,Lu Fei,Zheng Liqiang
Poly-(vinyl alcohol) (PVA) proton-conducting composite membranes were prepared using succinic acid (SA) as a cross-linking agent and Brønsted acidic ionic liquid (BAIL) as a proton source. The incorporated BAILs resulted in a relatively high proton conductivity compared with PVA/SA membrane without BAILs. The proton conductivities of PVA/SA/BAIL composite membranes increased versus the BAIL content. In addition, the optimal resultant proton conductivity of PVA/SA/BAIL composite membrane under dry condition could reach 0.4 mS/cm at 140 °C, which was higher than that of PVA/sulfosuccinic acid (SSA) composite membrane (0.032 mS/cm), PVA/SSA/5-aminotetrazole membrane (0.022 mS/cm at 130 °C), and PVA/chlorosulfonic acid/glutaraldehyde membrane (0.0585 mS/cm at 90 °C) measured at the same condition. It was notable that the PVA/SA/BAIL composite membranes could reach high thermal stability up to 150 °C, which was higher than that of traditional PVA membranes (below 80 °C).
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高影响因子
SUPRAMOLECULAR CHEMISTRY
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2017
·
IF 1.264
Xingxiu Qin,Xiashi Zhu
Ionic liquid-β-cyclodextrin polymer (ILs-β-CDCP) was firstly synthesised and characterised with FTIR, 13C CP/MAS NMR, X-ray powder diffraction, TGA and scanning electron microscope. A novel method of solid phase extraction (SPE) coupled with Ultraviolet–vis spectrophotometry for separation/analysis of lornoxicam was established. ILs-β-CDCP showed a higher adsorption capacity towards lornoxicam than β-CDCP. Adsorption mechanism of ILs-β-CDCP was elucidated by adsorption thermodynamics model, adsorption kinetic model, inclusion constants and FTIR analysis. ILs-β-CDCP exhibited favourable adsorption performance towards lornoxicam from serum and tablet samples. The experimental results herein suggested that ILs-β-CDCP could be successfully applied in the field of pharmic content especially in the treatment of serum.
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高影响因子
IONICS
·
2024
·Vol. 30
·期 5
·2783-2791
·
IF 2.4
Gu Ning,Li Xiaolin,Gao Miao,Liu Zixuan,Liu Qichao,Cao Yang,Sun Youyi
A new magnetic ionic liquid (MIL) based on 1-methylethyl ether-3-butylimidazole and [FeCl 4 ] − is synthesized for application in electrolyte. It is found that the electrochemical performance of electrochemical cell based on MIL electrolyte can be improved by applying magnetic field. The enhanced electrochemical performance is attributed to formation of micro-domain in the mixed electrolyte under magnetic field. The ions of MIL can align along direction of magnetic field, providing efficient transmission path for migration of Li + and Cl − . Under magnetic control, the MIL-based electrolyte does not only retain its wide electrochemical window characteristics, but also solve problem of limiting high viscosity of IL as electrolyte. The work provides a new method to design and prepare high-performance electrolyte for various electrochemical applications.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yangzhen Jin,Yebin Zhou,Pengze Zhang,Yi Liu,Chunshan Lu,Xiaonian Li
The catalytic alkaline dehydrochlorination process, characterized by high atom economy, stands as a prevalent method in the synthesis of valuable alkene halides. Nonetheless, the efficacy of ionic liquids (ILs) as catalysts for dehydrochlorination is hindered by challenges such as swift deactivation attributed to decomposition and reduced selectivity without clear causative factors. This investigation employs a systematic approach, integrating Density Functional Theory (DFT) simulations with experimental methodologies, to delve into the mechanisms of IL-catalyzed dehydrochlorination, aiming to elucidate both stabilization strategies and catalytic pathways. The examination of thermal decomposition rates is rooted in a meticulous assessment of the energy barriers associated with decomposition and dissociation processes. The active role of free Cl − is established, albeit its acidification by HCl, which results in diminished catalytic activity. To counteract this acidifying influence, a novel active site denoted as [Cl-KCl] − is conceptually devised to mitigate such effects. Through the strategic implementation of cationic fixation, the IL-KCl combination catalyst is synthesized and empirically confirmed to demonstrate augmented acid resistance while upholding a consistent reaction selectivity of approximately 85 %. This contrasts starkly with the declining catalytic selectivity observed with IL in isolation, plummeting from 85% to 65%. Consequently, the IL-KCl combination catalyst emerges as a promising option for alkali catalyzed dehydrochlorination, offering enhanced stability and sustained high selectivity throughout the catalytic process.
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Pharmaceuticals
·
2024
·Vol. 17
·期 10
·1273
·
IF 4.3
Bo Yang,Xu Zhang,Liguo Zhang,Jinjin Wu,Wei Wang,Qiaomei Huang,Zhenyuan Wang,Jichuan Zhang,Tongjie Xu,Chengyu Wu,Jiaheng Zhang
Objectives: To address the poor efficacy and percutaneous penetration of grape seed oil, ionic liquids and nanotechnology were combined to prepare a grape seed oil emulsion. Methods: A novel Menthol-CoQ10 ionic liquid and ionic liquid based grapeseed oil emulsion were prepared and confirmed. Results: The average size of the grapeseed oil emulsion was 218 nm, and its zeta potential was −33.5 mV. The ionic liquid-based grape seed oil emulsion exhibited a transdermal penetration effect 4.63-fold higher than that of ordinary grape seed oil emulsion. Ionic liquid also displayed enhanced efficiency both in vitro and in vivo. It significantly inhibited the production of DPPH free radicals and tyrosinase, inhibited melanin and matrix metalloproteinase-1 (MMP-1) produced by cells, and promoted type I collagen expression in fibroblasts. After 28 days of continuous use, the grapeseed oil emulsion improved the water content of the stratum corneum and the rate of transepidermal water loss, enhanced the firmness and elasticity of the skin, and significantly improved the total number and length of under-eye lines, tail lines, nasolabial folds, and marionette lines on the face. Conclusions: Menthol-CoQ10 ionic liquid is a promising functional excipient for both transdermal delivery increase and efficient enhancement. Ionic liquid and nanotechnology for grape seed oil facial mask displayed significantly enhanced efficacy and permeability.
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高影响因子
危险品化学品经营许可证（带存储）