Materials Today Communications
·
2025
·
IF 4.5
Guo Yongliang,Cui Jinfeng,Guo Junhong,Bao Xuemei,Yang Baoping
The polymeric composite undergoes a challenge of limitation on improvement of flame resistance by traditional intumescent flame retardants (IFRs) and confronts underlying compromise to mechanical property due to excessive load. Here, a ternary combination of butyltriphenylphosphonium-chelated orthoborates ionic liquid (IL) with aluminum hypophosphite and expandable graphite was employed to improve fire resistance of polystyrene (PS) and interfacial interaction. The optimized ratio of the IL in ternary composition was settled down, which the accordingly reduction on peak of heat release rate of PS composite approached to 72.5 % and 26.3 %, compared with neat PS and IL-free PS/IFRs composite. Meanwhile, the flame-retarding composite displayed self-extinguishment behavior under 13 wt% total loading. Retardation in condensed phase depends on residual char during combustion, which the ternary composition produced impressive long-size graphite worms. XRD and FTIR instrument for composite in non-isothermal condition disclose that addition of the IL broadened temperature range of expansion, achieving robust barrier formation during combustion. Furthermore, the IL evolved gaseous pyrolysis phosphorous-containing components was profiled by TG-FTIR technique, suggesting flame-retarding action in gas phase. In addition, the ternary composition endowed better mechanical property for PS in tensile test on account of alleviation between fillers and host polymer. With reinforcement of flame retardancy and mechanical property, the creation of ternary composition containing ionic liquid paves a way to rational design for IFRs system and process polymer composite with high performance.
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Biomass Conversion and Biorefinery
·
2025
·
IF 4.1
Niakan Mahsa,Qian Chao,Zhou Shaodong
The conversion of 5-hydroxymethylfurfural (HMF) and carbohydrates to 5-ethoxymethylfurfural (EMF) is an attractive biomass transformation owing to the potential application of the resulting product as a fuel additive. In this work, the imidazolium hydrogen sulfate ionic liquid was grafted on the surface of silica-coated iron oxide magnetic nanoparticles using cyanuric chloride as linker, and such a magnetically separable solid acid catalyst is referred to as HSO 4 /SMNPs. The catalytic activity of HSO 4 /SMNPs was evaluated for the etherification of biomass-derived HMF with ethanol and sequential dehydration/etherification of sugars to produce EMF. The impact of various reaction parameters was studied to achieve the optimal yield of EMF. HSO 4 /SMNPs provided EMF yields of 94.3%, 68.2%, and 53.3% from HMF, fructose, and inulin in ethanol, respectively, without the need for high boiling point co-solvents. Extraordinarily, the catalyst can be readily separated from the reaction mixture by applying a permanent magnet and reused for five times without substantial activity decrease.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Yali Ding,Juanjuan Feng,Mingxia Sun,Yang Feng,Xubo Xin,Min Sun
The accurate detection of analytes in honey is affected by the complex substrates, making it crucial to employ an effective sample preparation technique. In this work, an imidazolium ionic liquid was functionalized to the silica surface by a click reaction for solid-phase extraction (SPE) column, and in situ anion-exchange process was performed with different organic anions (dodecyl sulfonate, dodecyl benzene sulfonate, and naphthalene sulfonate). These SPE columns were evaluated through extracting the estrogens. The naphthalene sulfonate-based SPE column displayed the best extraction ability among these, and it was combined with high-performance liquid chromatography-diode array detection to establish an online enrichment and analysis system. Under the optimal test conditions, an online analytical method was developed, with high enrichment factors (1872–4744), wide linear ranges (0.0033–1.50, 0.0165–1.50, and 0.0330–1.50 μg g −1 ), and low detection limits (0.001–0.010 μg g −1 ). The method successfully determined several estrogens in some honey samples, and achieved satisfactory recovery results.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Tianhang Liu,Kaisheng Yao,Hang Li,Qi Wang,Tianhang Han,Aozhou Wang,Haili Zhao,Weiwei Lu
Developing a simple, environmentally friendly, and mild method to one-step prepare bimetallic nanoframes is pretty important but still technically challenging. In this paper, a simple and easy-to-operate ionic liquid (IL)-regulated protocol is proposed to fabricate Au–Pd superbranched trigonal nanoframes (STNFs) in water at room temperature. In the aqueous solution containing precursors (Na2PdCl4 and HAuCl4) and a reducing agent (ascorbic acid), a common IL 1-octyl-3-methylimidazolium chloride ([C8mim]Cl) was used to guide the anisotropic growth and construction of Au–Pd STNFs, brightly showing green and energy-saving characteristics. Au–Pd STNFs take shape as unique two-dimensional (2D) trigonal frameworks containing multilevel orderly branches. It is found that [C8mim]Cl is crucial to the formation of Au–Pd STNFs. Owing to the unique structures, high specific surface areas, large freestanding sizes, and probably electronic effects between Au and Pd, Au–Pd STNFs-1 exhibit dramatically enhanced catalytic activity, selectivity, durability, and convenience for recycling in the 4-nitrostyrene hydrogenation reaction. Specifically, 4-nitrostyrene can be converted completely only within 5.0 min at 25 °C under atmospheric pressure, and the selectivity toward 4-nitroethylbenzene is as high as 100% and maintains good performance after five cycles. It is expected that well-constructed Au–Pd STNFs also display advanced potential in other applications.
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DYES AND PIGMENTS
·
2024
·
IF 4.1
Song Wei,Xiang Luo,Shaofeng Shao,Lei Zhang
Machine learning-assisted synthesis of new materials has been an ongoing hot topic. Luminescent Ag–Zn–In–S quaternary semiconductor quantum dot thin films have great application potential in many fields because of their excellent photoelectric performance. In this study, an environmentally friendly ionic liquid-assisted approach was employed to prepare high-performance Ag–Zn–In–S luminescent thin films, and machine learning methods were applied to screen the optimal preparation conditions. The photoluminescence (PL) performance, crystal structure, and morphology of the thin films were also been studied. The initial data set was obtained by high-throughput experiments. By comparing machine learning algorithms of Xgboost, Random Forest, Bagging, SVM, Extra Tree, and Gradient Boosting, the Random Forest achieved the best accuracy (r = 0.84, R 2 = 0.847) and was selected to predict the optimal preparation conditions of Ag–Zn–In–S quaternary quantum dot thin films. The machine learning predicted results are in great agreement with the subsequent experimental results, which verifies the accuracy and effectiveness of the machine learning model. This study offers a theoretical foundation for preparing optimal inorganic quantum dot luminescent materials using machine learning.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Wenpeng Jiang,Qingli Yang,Huixiao Duo,Wei Wu,Xiudan Hou
The polymer ionic liquid (1-allyl-3-butylimidazolium bromide) enhanced silica aerogel was modified onto the surface of stainless-steel mesh to immobilize aptamer-1 for the specific recognition of AFB1. The porous channels of silica aerogel could prevent the interference of macromolecules in food samples. Enzyme kinetic analysis showed that the MoS 2 /Au was an effective peroxidase mimic with a relatively low Michaelis constant ( K m ) value of 0.17 mM and a high catalytic rate of 3.87 × 10 −8 mol (L·s) −1 , which exhibited obvious superiority compared with horseradish peroxidase. The established “sandwich-structure” biosensor was coupled with the smartphone “Color Picker” application was used to detect AFB1 with a wide linear range (1–100 ng mL −1 ) and low detection limit (0.25 ng mL −1 ). The anti-interference ability of the established biosensor was evaluated by adding different concentrations of standards in corn, peanut, and wheat and matrix effects were 90.84–106.11 %. The results showed that this method demonstrated high specificity, sensitivity, rapidity and low interference in food samples.
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Luyan Meng,Bing Wang,Sijia Zhang,Shun Zhang,Ting Cai,Chuan-Fan Ding,Yinghua Yan
A Ti 4+ -functionalized ionic liquid polymer microsphere was proposed and prepared through free radical precipitation polymerization. The polymer microsphere demonstrates excellent performance on phosphopeptide enrichment, with a low detection limit (0.5 fmol) and good selectivity (1:2500). Through the analysis of HepG2 cell lysate using nano LC-MS/MS after material enrichment, a total of 1100 phosphopeptides and 733 phosphoproteins were identified. Additionally, in the serum of liver cancer patients, 69 phosphopeptides, 47 phosphoproteins, and 52 phosphorylation sites were identified, while healthy controls exhibited 55 phosphopeptides, 31 phosphoproteins, and 40 phosphorylation sites. Label-free quantification revealed 10 differentially expressed proteins (DEPs), with five proteins (FN1, SERPIND1, SERPINF2, IGFBP3, and MENT) being up-regulated and five proteins (SELENOP, PLG, SPP2, SERPINC1, and GP1BB) being down-regulated. These findings highlight the potential of the MBA-VImDOPA-Ti 4+ polymer microsphere in specifically enriching phosphopeptides from clinical biological samples.
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ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Zhuoru Huang,Wenjian Yang,Yanchi Zhang,Jiaxi Yin,Xianyou Sun,Jiaying Sun,Guangqing Ren,Shichao Tian,Ping Wang,Hao Wan
Hydrogen has been widely used in industrial and commercial applications as a carbon-free, efficient energy source. Due to the high flammability and explosion risk of hydrogen–air mixtures, it is vital to develop sensors featuring fast-responding and high sensitivity for hydrogen leakage detection. This paper presents a miniaturized electrochemical gas sensor by elaborately establishing a nanocomposite and thin ionic liquid interface for highly sensitive and rapid electrochemical detection of hydrogen, in which a remarkable response time and recovery time of approximately 6 s was achieved at room temperature. A screen-printed carbon electrode was modified with a reduced graphene oxide–carbon nanotube (rGO-CNT) hybrid and platinum–palladium (Pt–Pd) bimetallic nanoparticles to realize high sensitivity. To achieve miniaturization and high stability of the sensor, a thin-film room-temperature ionic liquid (RTIL) was employed as the electrolyte with a significantly decreased response time. The fast-responding hydrogen sensor demonstrates excellent performance with high sensitivity, linearity, and repeatability at concentrations below the lower explosive limit of 4 vol %. The engineered high-performance interface and gas sensor provide a promising and effective strategy for gas sensor design and rapid hazardous gas monitoring.
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PubMed
高影响因子
ELECTROANALYSIS
·
2018
·Vol. 30
·期 5
·842-851
·
IF 2.851
Meiling Wang,Mingzhu Cui,Weifeng Liu,Xuguang Liu,Bingshe Xu
Here, a facile reduction approach for synthesis of β-cyclodextrin functionalized reduced graphite oxide with the aid of ionic liquid (βCD/IRGO) was reported. This strategy relies on the simple mixing of pre-pared aqueous βCD/GO with ionic liquid (IL) at high temperatures, which can bring about a well dispersed βCD/RGO in the utilized IL (βCD/IRGO) with a synchronous evaporation of water. The as-prepared βCD/IRGO product can be stably re-dispersed in water (up to 1.0 mg/mL) after washed and dried. And the presented βCD/IRGO composites possess high supramolecular recognition capability and good conductivity for realizing enhanced electrochemical response towards simultaneous detection of guanine and adenine compared with other βCD/carbon (RGO or carbon nanotube) based composites. In the presence of one of analysts, the linear response ranges is 0.03–10.0 μM for guanine and 0.02–7.0 μM for adenine, respectively, with detection limit of 0.01 μM for both guanine and adenine (S/N=3). This ease of making the βCD/IRGO composite will open up possibilities of its diversifier applications.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qingyun Zhao,Xiaohui Liu,Shuo Deng,Xianghong Zheng,Birong Zeng,Xinyu Liu,Yiting Xu,Conghui Yuan,Lizong Dai
A composited flame-retardant phosphorus-containing polyimine vitrimer films (Ionic-PIs) were synthesized by using ionic liquid BMIM∙PF 6 containing flame retardant elements N, P and F as the regulator. The effects of the addition amount of BMIM∙PF 6 on the mechanical properties, degradation, recycling, and flame retardancy were investigated. Compared to intrinsically phosphorus-containing polyimine film (PI), the composited Ionic-PIs exhibited better mechanical strength and toughness. Hydrogen bonding interactions between BMIM∙PF 6 and polyimine network greatly increased Ionic-PI’s mechanical strength at a low addition of 1 wt%, and the microphase separation caused by the aggregation of BMIM∙PF 6 drastically enhanced their toughness as the addition increased. Ionic-PIs exhibited excellent reprocessability at 85 °C and degradable recyclability under acidic conditions. In addition, due to the synergistic effect of condensed-phase and gas-phase flame-retardant mechanisms, the Ionic-PIs possessed good flame retardancy with LOI above 27 % and a UL-94 test reaching VTM-0 grade, which was important for the high-fire safety of polyimine vitrimer. This work is helpful to provide a simple and feasible strategy to modulate the comprehensive properties of cross-linked polyimine vitrimer film and to expand their applications in many fields.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Tianyu Zheng,Lianjing Mao,Xiao Li,Chunsen Ye,Pengrui Zhang,Wei Sun,Jinhe Sun
With the rapid development of the lithium-ion battery industry, the demand for lithium resources is becoming more and more urgent. Lithium extraction is a widely used process; especially, tributyl phosphate (TBP) systems have attracted much attention. During the extraction and purification process of lithium ions, the extractant TBP may encounter issues including aging, emulsification, precipitation, and low utilization rates. These problems arise due to an inadequate understanding of the extraction mechanism. In this work, the TBP-ionic liquid system was utilized to extract Li+, the variations of trace water in the organic phase were systematically and quantitatively investigated, and the extraction mechanism was further investigated. Experiments have confirmed that TBP forms a 1:1 complex with water. Various complex ratios of TBP, Li+, and water were determined, and the structures were verified by simulations. The complexes have three different ratios of TBP, Li+, and water: 2:1:2, 3:1:1, and 4:1:0. Water molecules are substituted during the complexation of Li+ with TBP, and meanwhile, the NTf2– anion equilibrates the charge of the Li+-TBP complex. This work provides experimental data and a theoretical basis for understanding Li+ extraction in the TBP-ionic liquid system, which is conducive to the sustainable development of the lithium industry.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiaming Mao,Chang Li,Yanbin Yun,Jia Liu,Wenjuan Yang,Meng Li,Lihua Wang,Chunli Li,Wenli Liu
To reduce the energy consumption for solvent regeneration and mitigate the corrosiveness of saturated solvents, dual-functionalized ionic liquid (IL) [DMAPA][TZ] was synthesized as a primary absorbent, and mixed with a phase separation accelerator poly (ethylene glycol) dimethyl ether (NHD) or propylene carbonate (PC) as biphasic solvents, to achieve high efficiency, energy savings, and corrosion inhibition of post-combustion CO 2 capture. The results demonstrated a transition from a homogeneous solvent to a biphasic system upon CO 2 absorption, with the majority of CO 2 being concentrated in the rich phase, which is related to the formation of hydrogen bonds. Molecular dynamics analysis showed that interaction between the IL and PC is significantly stronger than that with NHD, resulting in a reduced absorption capacity of IL-PC relative to IL-NHD, while NHD effectively suppressed the formation of HCO 3 − /CO 3 2− . At 373 K, both solvents exhibited efficient regeneration of their respective rich phases within 10 min. The calculated absorption enthalpies for IL-NHD and IL-PC are remarkably low at 0.662 and 0.772 GJ·t −1 , respectively, and the regeneration energy consumption of IL-NHD was lower to 1.387 GJ·t −1 . Notably, the phase separation accelerator exerts a significant influence on the phase-transition behavior and absorption products of biphasic solvents. Furthermore, ILs effectively inhibited corrosion through the adsorption-passivation mechanism; specifically, the corrosion rate of the CO 2 -rich phase in IL-NHD relative to 20# carbon steel was only 0.1896 mpy, which is only 1/865 of the rate of the saturated 5 M MEA solution.
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