JOURNAL OF CHROMATOGRAPHY A
·
2014
·
IF 4.258
Xiaoyan Zheng,Lijun He,Yajing Duan,Xiuming Jiang,Guoqiang Xiang,Wenjie Zhao,Shusheng Zhang
New poly(ionic liquid) immobilized magnetic nanoparticles (PIL-MNPs) were synthesized via co-polymerization of 1-vinyl-3-hexylimidazolium-based ionic liquid and vinyl-modified magnetic particles and were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and magnetic measurements. The PIL-MNPs were utilized as adsorbent phases in magnetic solid-phase extraction (MSPE). The extraction and enrichment efficiency were evaluated by using four organophosphorus pesticides (parathion, fenthion, phoxim and temephos) as test analytes. Various parameters, such as amount of adsorbent, adsorption time, desorption solvent and time, and ionic strength were investigated. The proposed method showed good linearity for the analytes in the concentration range of 1–200 μg L −1 with a correlation coefficient ( R ) > 0.9963. Low limit of detection of 0.01 μg L −1 and high enrichment factors ranging from 84 to 161 were achieved. The proposed method has been successfully used to determine organophosphorus pesticides from three tea drink samples with satisfactory recovery of 81.4–112.6% and RSDs of 4.5–11.3%. The PIL-MNP adsorbent can be reused for 20 times without a noticeable decrease in extraction efficiency.
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PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
De Bai,Haowei Chen,Lijuan Liu,Nanxi Xiang,Jichuan Zhang,Chengyu Wu,Jiaheng Zhang,Fang Wang
Pterostilbene (PTB) is a hydrophobic compound derived from plants in the Astragalus family. PTB possesses remarkable skin brightening and antioxidant properties. However, delivery methods for PTB require enhancement, and this can be achieved by formulating suitable carriers. In this study, we prepared ionic liquid microcapsules containing PTB by using a microencapsulation technique based on a matrine and cocinic acid ([Mat][Coc]) ionic liquid. The particle size of the microcapsules was 154.5 ± 3.42 nm, and the encapsulation efficiency was as high as 99.7 %. Further, the PTB-loaded ionic liquid microcapsules had good biocompatibility, enhanced skin retention (7.7-times higher than that of free PTB), and improved skin penetration without damaging the skin structure. Clinical testing with human subjects revealed that the microcapsule emulsion reduced fine lines and brightened skin tone. Therefore, PTB-loaded ionic liquid microcapsules have promise for use in cosmetic formulations and applications in transdermal drug delivery and efficacy enhancement.
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EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Huicai Zheng,Guichuan Xu,Wen Li,Xiaoju Zhang,Binshen Wang,Li Qin,Limei Zhou
Here we report a strategy to synthesize efficient polymeric carbon nitrides/3D honeycomb poly(ionic liquid)s photoreactor. The initial parent polymeric carbon nitrides (PCN) were synthesized by sintering precursor formed by self-assembling molecules of cyanuric acid and melamine. Ionic liquids with polymerizable groups polymerized in situ with crosslinkers in a system dispersed in PCN to synthesize a photoreactor. Impressively, the obtained photoreactors have structurally stable nanoparticle morphology in a dry state and a transparent 3D network structure in a swelling state. Their successful formation, swelling ability and morphology were fully characterized by XRD, WAXS, FT-IR, SEM, XPS, TEM and N 2 adsorption/desorption isotherm. UV–vis DRS, PL spectra, and photocurrent tests showed the improved photo-electric property of the photoreactor, which was attributed to the 3D network honeycomb structure improving the contact between the active centres in the reactor and the reaction substrate and the improving electron-hole separation efficiency of PCN by excellent electron transfer ability of poly(ionic liquid)s. These synthesized photoreactors could highly efficiently degrade the anionic dyes, such as methyl orange and acid blue 93, under a metal halide lamp or even natural sunlight.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Chen Wang,Hongrui Yang,Fei Li,Pingning Jin,Wenjuan Zhu,Jing Fan
Fluorescent whitening agent 351 (FWA351) is an emerging highly persistent pollutant with potentially harmful effects on human health and aquatic ecosystem. However, developing highly effective adsorbents for the pre-treatment of environmental water samples containing FWA351 remains a problem. In this study, a novel polymer supported hydroxyl-functionalized ionic liquid (PS-[HMMim][Cl]) was prepared via a simple one-step method and used for the removal of FWA351 from water. It was found that the PS-[HMMim][Cl] exhibited an ultrahigh adsorption capacity of 1203.6 mg/g for FWA351 and maintained high removal efficiency in a wide pH range (2.0–9.0). Notably, even the concentration of FWA351 was as low as 0.005 mg/L (5 ppb), FWA351 could be effectively removed by the adsorbent, achieving an enrichment factor as high as 447.8. Various inorganic salts (such as KCl, NaCl and MgCl 2 ) at the concentration up to 1.0 mol/L had no obvious effect on the removal efficiency. The PS-[HMMim][Cl] also displayed outstanding adsorption performance towards fluorescent whitening agents (FWAs) with similar structure to FWA351 and could be regenerated and reused for at least 8 cycles. Finally, the adsorbent was applied for the pre-treatment and then detection of FWA351 in six kinds of environmental water samples. Mechanism studies suggest that the synergistic driving forces of electrostatic attraction, hydrogen bonding, π-π interaction and ion exchange are responsible for the efficient adsorption of FWA351. This work provides a new strategy for efficient adsorption and analysis of FWA351.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Hao Wang,Weiwei Lu,Peng Xu,Jie Luo,Kaisheng Yao,Jun Zhang,Xuefeng Wei,Shuge Peng,Haoyan Cheng,Hao Hu,Kunpeng Sun
All inorganic metal halide perovskites (MHPs) have been regarded as a new type of promising photocatalyst for the reduction of CO2. However, due to their strong ionicity and the labile surface ligands, there is still much room for improvement of the stability and efficiency of MHP photocatalysts. Here, we propose a new strategy simultaneously using ionic liquid (IL) as a surface passivation ligand and a precursor to mediate the growth and then stabilize CsPbBr3 MHPs for the photocatalytic reduction of CO2. First, the TEM and XRD results show that the prepared CsPbBr3 has a cubic morphology with the monoclinic phase when the IL of 1-octyl-3-methylimidazolium bromide ([Omim]Br) is used as the surface ligand. When the molar ratio of [Omim]Br to Pb(CH3COO)2 is optimized to 2, the photoluminescence quantum yield of the prepared CsPbBr3 can reach as high as 90.93%, suggesting the effective reduction of surface defects by the IL ligand. Importantly, the CsPbBr3 nanocrystals show high stability under the ambient stimuli of light, heat, and humidity. The subsequent FT-IR and XPS characterizations indicate that the presence of [Omim]Br on the surface of CsPbBr3 increases the Br-rich state, which accounts for the excellent optical property and stability of the CsPbBr3 nanocrystals. Finally, with the assistance of IL as the activator of CO2, the CsPbBr3 photocatalysts provide a high evolution rate of 24.56 and 6.66 μmol g–1 h–1 for CO and CH4, respectively. Multifunctional ILs as passivation ligands, reaction precursors, and CO2 activators provide an efficient pathway to fabricate stable metal halide perovskites for photocatalytic CO2 conversion.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 17
·9626-9634
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IF 11.9
Hao Wu,Mi Wang,Wanbao Wu,De Bai,Yihong Liang,Shunyou Hu,Wen Yu,Peng He,Jiaheng Zhang
Multi-stimuli-responsive devices have attracted much attention in the field of smart windows due to their rich color-adjustable effect and high energy efficiency. However, most multi-stimuli-responsive color-adjustable devices have insufficient stability and complex preparation processes, which impede their industrialization. In this work, thermo- and electro-dual-responsive devices were fabricated by preparing thermochromic ion gel electrolytes and combining them with electrochromic films. Locating thermochromic and electrochromic materials in different functional layers reduces their mutual influence and prevents a decline in their single performances. The thermochromic ion gel electrolytes with a lower critical solution temperature (LCST) phenomenon were obtained from a simple UV-curing method with polyurethane acrylate oligomers and ionic liquids. Compared with traditional LCST hydrogels, the ion gels undergo phase transitions without a volume change, exhibit better thermal and ambient stability, and possess a wide electrochemical window. They can be widely used as electrolytes for various electrochromic materials, resulting in color-changing performance and cycling stability comparable to those of organic solution and ionic liquid electrolytes. The ion gels' LCST effect and the electrochromic layers' color-changing characteristics endow the devices with a dual-responsive feature and improved optical modulation ability. This gives the devices great application potential in smart windows and indoor decorations.
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高影响因子
POLYMER DEGRADATION AND STABILITY
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2023
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IF 5.9
Yaxuan Wang,Jinyong Ren,Mingyu Ou,Jiahui Cui,Haocun Guan,Richeng Lian,Chuanmei Jiao,Xilei Chen
To meet the demands of reducing the serious illness caused by the growth of bacteria and the severe life-threatening due to interior fabric fire, the attention to antibacterial flame-retardant cotton fabrics has reached an unprecedented height. In this work, a simple step-by-step dip-coating method was applied for the multifunctional cotton based on epichlorohydrin-modified aramid nanofibers (AEP), ionic liquid (IL), and CuSO 4 . Cot/AEP/IL/Cu exhibited low flammability with a limiting oxygen index (LOI) improving from 18.5% to 28.5% and high flame retardancy (e.g., ∼43.7% and 41.7% decline in peak heat release rate (pHRR) and total heat release rate (THR)). Noticeably, the Cot/AEP/IL/Cu revealed conspicuous smoke suppression and toxic reduction property compared with Cot/AEP/IL (e.g., ∼77.0% decline in peak smoke release rate (pSPR) and 40.5% in total CO production (TCOP)). In addition, the antibacterial property of treated cotton was investigated by the agar diffusion plate method. Due to the presence of Cu ion, Cot/AEP/IL/Cu remarkably restrains the activity of E. coli and S. aureus. This work prepared a multifunctional cotton fabric integrated with flame-retardant, smoke suppression, toxicity reduction, and antibacterial in a straightforward way, which endows promising applications in many fields.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Fei Gao,Cailin Ji,Shougui Wang,Jipeng Dong,Changqing Guo,Yuwen Gao,Guanghui Chen
Integrating multifunctional active sites into an appropriate porous material is a promising strategy to achieve great catalytic performance for CO 2 cycloaddition . Herein, carboxy-functionalized imidazolium ionic liquid were successfully anchored onto the MCM-41 mesoporous silicates. The resultant MCM-41-Imi/COOH integrates hydrogen bond donor, Lewis base and nucleophilic ionic sites, and possesses a high surface area and mesopore structure. As-prepared catalyst achieves a good catalytic activity for CO 2 cycloaddition with propylene oxide under cocatalyst- and solvent-free conditions. Moreover, the catalyst MCM-41-Imi/COOH exhibits the good cycling stability and versatility to various epoxides . In particular, the catalyst shows a satisfactory catalytic activity for catalyzing dilute CO 2 conversion to cyclic carbonate. Furthermore, a possible reaction mechanism for the cycloaddition of CO 2 with propylene oxide over the catalyst MCM-41-Imi/COOH was proposed.
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高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 153
·期 11
·3371-3382
·
IF 2.936
Kang Yuexin,Sun Shangde,Wang Ping
Monoricinolein (MRO) is a renewable and biodegradable surfactant derived from castor oil (CO). In this work, a novel ionic liquid (IL)-catalyzed method for selective MRO preparation by the glycerolysis of CO was investigated. Six basic ILs ([Bmim]Im, [Bmim]OH, [Bmim]DCN, [Bmim]OAc, [Emim]OAc, [Emim]Im) were screened and evaluated as homogeneous catalysts. Among the tested ILs, [Bmim]Im showed the best catalysis performance. An evaluation of the effects of reaction variables on the IL-catalyzed glycerolysis was carried out (temperature, reaction time, IL load and substrate ratio). The maximum MRO yield (75.77 ± 1.20%) and triacylglyceride (TAG) conversion (96.67 ± 0.10%) were obtained under the following optimized conditions: CO/glycerol molar ratio 1:6, IL load 10%, 180 °C, 3 h, and no water added. The results showed that the selectivity of MRO was enhanced. The activation energies (Ea) for CO conversion and formation of the MRO were 44.07 kJ/mol and 54.99 kJ/mol, respectively. Graphical Abstract
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2019
·Vol. 45
·期 9
·4315-4334
·
IF 2.064
Xun Suhang,Yu Zhendong,He Minqiang,Wei Yanchen,Li Xiaowei,Zhang Ming,Zhu Wenshuai,Li Huaming
In order to effectively catalyze the oxidation of dibenzothiophene (DBT) in diesel, a phosphotungstic-based ionic liquid (IL) supported catalyst [C 16 mim] 3 PW 12 O 40 /TiO 2 was prepared through a one-step method. Commercially available TiO 2 ( C -TiO 2 ), a type of transition metal oxide, was selected as a carrier for comparison. The structure and composition of the catalysts were studied through TG, FT-IR, UV-DRS, wide-angle XRD, N 2 adsorption–desorption, SEM and XPS analysis. It was found that the Keggin structure of [C 16 mim] 3 PW 12 O 40 was still preserved in the supported catalysts. In addition, the catalysts were applied in extractive coupled catalytic oxidative desulfurization (ECODS) system with H 2 O 2 participating, and dibenzothiophene (DBT) could be totally removed after 1 h under optimum conditions. In addition, factors that affected the desulfurization efficiencies were also been studied in detail. The oxidation product after the reaction was detected by means of GC–MS analysis, DBTO 2 ( m / z = 216.0) was proved to be the only product of DBT and the possible mechanism was proposed. Moreover, the reusability of the supported ionic liquid catalyst was also investigated, and the oxidation of DBT could still reach 97.8% after eight cycles.
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JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Hao Wu,Zhaizhu Deng,Bijian Zhou,Minghui Qi,Minghuang Hong,Guobin Ren
The aim of this study was to explore the feasibility of transdermal delivery of ibuprofen using ionic liquid technology. Ibuprofen, a non-steroidal anti-inflammatory drug, was transformed into nine ionic liquids using aromatic, tetraalkylammonium and tetraalkylphosphonium cationic counterions . Both the free drug and synthesized ionic liquids were fully characterized by X-ray Powder Diffractometry (XRPD) analysis, thermal analysis, Fourier Transform Infrared Spectroscopy (FT-IR) analysis and Nuclear Magnetic Resonance Spectrometer analysis (NMR), and the aqueous solubility at 25 °C as well as the octanol-water partition coefficients (LogP) were measured. To evaluate transdermal potential, in vitro skin permeation testing was carried out via Skin Parallel Artificial Membrane Permeability Assays (Skin PAMPA). In addition, the potential skin toxicity of ionic liquids was evaluated by determining their cytotoxicity against HaCaT cells. All the synthesized ibuprofen ionic liquids showed improved skin permeability comparing with the conventional sodium salt. Specifically, ionic liquids with didecyldimethylammonium and tetrahexylammonium counterions were significantly more permeable through artificial skin membrane than the free form of ibuprofen. Conductivity test and 2D NMR nuclear Overhauser effect (NOE) techniques corroborated that ionic liquids with stronger intermolecular intermolecular interaction and higher degree of ion association in aqueous environment crossed the artificial skin membrane more rapidly and efficiently. Taken together, ionic liquids technology could be a versatile platform to turn the physicochemical and biological properties of ionizable drugs and facilitate their transdermal delivery .
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Junhai Wu,Bihong Lv,Xiaomin Wu,Zuoming Zhou,Guohua Jing
A series of novel dual-functionalized ionic liquids (FILs) with the combinations of diethylenetriamine cation ([DETAH]+) and aprotic heterocyclic anion (AHA) are explored for efficient and reversible CO2 capture, which was distinguished from the traditional strategy by increasing the amino group number of ionic liquids. The structural features and the interactions between ions and CO2 were performed under the DFT method, at the B3LYP/6-311++G** level. The CO2 absorption loadings of [DETAH][Im], [DETAH][Py], and [DETAH][Tz] were 11.91, 11.36, and 10.10 mol CO2/ kg IL, respectively. After the fifth cycle, their regeneration efficiencies still kept above 90%. Based on the calculation and 13C NMR results, the reaction mechanisms of CO2 capture into [DETAH][AHA] solutions were clarified. The amino groups of [DETAH]+ reacted with CO2 to produce [DETAH]+-carbamates, which guaranteed the high absorption rate. Meanwhile, [AHA]− could also equimolecularly react with CO2 to form carbamate, which subsequently hydrolyzes into HCO3–/CO32–. Notably, the [AHA]− was protonated during the CO2 absorption process, and [AHA]-H could react with [DETAH]+-carbamates to produce [DETAH]+, which helped to recycle the active components of the absorbent and further increased the CO2 capacity and regenerability of the absorbent. The novel dual FILs present as an efficient candidate for CO2 capture.
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危险品化学品经营许可证（带存储）