ACS Sustainable Chemistry & Engineering
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2020
·
IF 7.632
Fusheng Liu,Ran Ping,Yongqiang Gu,Penghui Zhao,Bin Liu,Jun Gao,Mengshuai Liu
CO2 capture and utilization (CCU) have aroused much attention. In this paper, several novel triazolium-based ionic liquids (ILs) were developed for highly efficient transformation of CO2 into quinazoline-2,4(1H,3H)-diones. The catalytic behaviors such as the effects of IL structures and reaction parameters, catalyst recyclability, and scope of substrates were studied in detail. As compared to the reported homogeneous and heterogeneous catalysts, the [HTMG][Triz] with a tetramethylguanidine cation and a triazole anion exhibited an exceptional activity at 50 °C and 1 atm CO2 without any organic solvents. On the basis of the CCU strategy, we first studied the equimolar CO2 capture by the [HTMG][Triz] and one pot conversion of activated CO2 into various quinazoline-2,4(1H,3H)-diones, and good to excellent product yields were obtained. In addition, the catalytic performance for synthesis of quinazoline-2,4(1H,3H)-dione under low concentration of CO2 using a simulated flue gas was studied. The developed triazolium-based ILs could realize simultaneous activation of CO2 and the substrates under ambient conditions, which also have been demonstrated to support the reaction mechanism well. The integrative protocol here shows great significance in the practical synthesis of quinazoline-2,4(1H,3H)-dione and their derivatives from captured CO2 waste under mild conditions.
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TRANSITION METAL CHEMISTRY
·
2020
·Vol. 45
·期 6
·413-421
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IF 1.366
Li Lingyan,Li Lei,Li Qianqian,Shen Yiming,Pan Shangke,Pan Jianguo
Two novel tetrahedral Mn (II) halide single-crystals [(C 7 H 10 N) 2 ][MnCl 4 ] ( 1 ) and [(C 7 H 10 N) 2 ][MnBr 4 ] ( 2 ), based on pyridine ionic liquids, have been successfully prepared. Centimeter-sized single crystal 2 was grown through bottom seed-solution temperature-lowering method, while the 1 was synthesized by solvent slow evaporation. Structure elucidation results indicate that the two crystals crystallize in the different space groups of the same monoclinic system. Significantly, the solid crystal 2 is possessed of superior luminescence properties than 1 at room temperature. Excited by ultraviolet light, the 1 and 2 emit intense green emission bands derived from the Mn (II) 4 T(G) energy level. The fluorescent lifetimes are 384.43 and 187.83 μs, respectively, and quantum yields are 82% and 12%, respectively. Furthermore, under the excitation of X-ray, the 2 exhibits prominent X-ray fluorescence performance.
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Small Methods
·
2021
·Vol. 5
·期 7
·2100505
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IF 14.188
Yong-Ya Zhang,Nan Zhang,Peng Peng,Rui Wang,Yan Jin,Ya-Kun Lv,Xin Wang,Wei Wei,Shuang-Quan Zang
Design and development of cost-effective electrocatalysts with high efficiency and stability for scalable and sustainable hydrogen production through water splitting is still challenging. Herein, with the aid of divinyl functionalized ionic liquids, uniformly distributed Ru nanoparticles (NPs) on nitrogen-doped carbon frameworks are obtained via an in situ confined polymerization strategy. Attributed to the unique lamellar structure and confinement effect of carbon supports, the optimized homo-PIL-Ru/C-600 (with Ru 10 wt%) catalyst exhibits superior catalytic efficiency for the hydrogen evolution reaction with the overpotential of only 16 mV at a current density of 10 mA cm −2 and the corresponding Tafel slope of only 42 mV dec −1 . Moreover, the performance can be well reserved even after 10 000 cycles, demonstrating excellent stability and promising potentials for industrial application. This work not only provides a facile approach for the preparation of highly efficient Ru-based catalysts, but also guides the synthesis of other highly dispersed metallic NPs for special applications.
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International Journal of Greenhouse Gas Control
·
2019
·
IF 3.231
Bihong Lv,Kunxiang Wu,Zuoming Zhou,Guohua Jing
Quantum chemical calculations was used for efficiently screening of the corrosion inhibitors from a series of organic and inorganic inhibitors for 20# carbon steel in CO 2 -saturated [TETAH][Lys] solution in the this work, which was different from the traditional usage by employed for confirming the experimental results. The inhibitors of MBI and Na 2 MoO 4 were emerged as the best alternatives, inhibiting the corrosion by provided a layer of protection between the carbon steel and the solution. It was found that the greatest contribution to the adsorption of MBI and Na 2 MoO 4 was S15 and Mo1, and these two inhibitors were of the mixed and anodic type inhibitor, respectively. The adsorption of them on carbon steel obeyed the Langmuir isotherm and involved competitive physisorption and chemisorption. The kinetic of the adsorptions were investigated, and the thermodynamic parameters had been calculated. The experimental results demonstrated a reasonably good agreement between theory and experiment, and a reference was provide for the optimum additive agent in the technical design.
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JOURNAL OF MOLECULAR LIQUIDS
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2019
·
IF 4.561
Guang Yang,Hongye Huang,Junyu Chen,Defu Gan,Fengjie Deng,Qiang Huang,Yuanqing Wen,Meiying Liu,Xiaoyong Zhang,Yen Wei
Nanodiamonds (ND) is a novel type of carbon nanomaterials with small size, large specific surface areas, low cost and some other physicochemical properties. However, the environmental applications of ND are still rarely reported because of its low adsorption performance. In this work, we reported for the first time for the surface modification of ND with ionic liquids through a facile and effective Michael addition reaction. To synthesis of the ternary ND@IL composites, ND was first linked with APTES by a silanization reaction and then [C 16 VIm + ] [Br − ] was conjugated on the surface of amino groups functionalized ND via the Michael addition reaction. The ND@IL composites were applied as adsorbents for removal of Congo red (CR) from aqueous solution and displayed high removal efficiency (92.78%) at room temperature and neutral solution. Under certain adsorption conditions, the adsorption capacities of pristine ND and ND@IL towards CR is 61.1 and 226.4 mg g −1 , respectively. The pseudo-second-order model fitting the adsorption kinetic data is superior to pseudo-first-order model and Freundlich isotherm model describes the experimental data well. Further experiments showed that the removal process was pH dependence, exothermic and spontaneous. More importantly, ND@IL composites could be regenerated via adjustment of pH values and still maintain high adsorption capacity after five regeneration cycles. All of the above results demonstrated that these ionic liquids modified ND are promising adsorbents for highly efficient and quick removal of environmental pollutants from aqueous effluents.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 4
·H157
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IF 3.12
Dandan Xu,Qin Shi,Xiaozhe Song,Hui Wang,Zhaoyong Bian
As a binder for the stabilization and dispersion of CoNi nanoparticles (NPs), ionic liquids (IL) were designed to connect inorganic anion on IL-functionalized reduced graphene oxide (rGO) and metal cation. The CoNi/IL-rGO described excellent oxygen reduction reaction (ORR) and the selective adsorption of bimetallic CoNi for chlorophene hydrodechlorination (HDC). The prepared electrocatalyst was characterized by SEM, TEM, XPS, Raman spectroscopy, XRD, and UV–vis spectroscopy. Results indicated that ILs could be functionalized by π–π stacking on the rGO surface. The optimal bimetallic CoNi NPs (Co-to-Ni weight ratio of 2.5:2.5) with small particles sizes (3.33 ± 0.03 nm) were uniformly dispersed on the surface of IL-rGO (mass ratio of IL:GO was 2:1) among a series of as-prepared catalysts. The IL on the rGO surface could prevent rGO agglomeration and provide sufficient binding sites to anchor the CoNi NPs via electrostatic interaction. Co(2.5)Ni(2.5)/IL(2)-rGO demonstrated low impedance (7.5 Ω) and diffusion resistance due to the introduction of IL. Co(2.5)Ni(2.5)/IL(2)-rGO exhibited a high peak current (−0.35 mA), preferred two-electron selectivity and high H2O2 productivity (>80%) toward ORR in an alkaline solution. The possible dechlorination mechanism of chlorophene was ascribed to the combination of adsorbed hydrogen on Co and adsorbed chlorophene on Ni.
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Advanced Materials Technologies
·
2018
·Vol. 4
·期 2
·1800515
·
IF 4.622
Juanjuan Wu,Ying Yan,Lijing Zhang,Zizhen Qin,Shengyang Tao
Mass transfer and catalyst recovery are both influential factors in heterogeneous catalytic processes, which significantly affect the reaction efficiency. Therefore, design and fabrication of reactors and catalysts with reasonable structure and property are central issues in heterogeneous reactions. Herein, agitating impeller (AI) with prismatic structure and catalytic property is conveniently constructed via the combination of 3D printing technology and polymeric ionic liquids (PILs). The further modification of the PILs on impellers endowed them with the ability of ion exchange, which helped to load Pd nanoparticles on the surface as catalysts for reduction, Suzuki coupling, and dye decolorization reactions. Prisms on the impellers significantly enhance the catalytic efficiency of these reactions through improving the mass transfer. The yield reaches nearly 100%. Catalytic impellers could be easily separated from the reactor and without a visible leak of Pd catalysts so that they could repeatedly be used more than ten times with high performance. The numerical simulation and experimental characterizations are both used to explore the mechanism of the mass transfer and the activity of the catalytic surface, which give a full understanding of the benefits of 3D printing and PILs in heterogeneous reactions.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Yong Liu,Shenshen Li,Xiying Li,Liqun Mao,Fujian Liu
Development of efficient catalysts with low cost for the oxygen reduction reaction (ORR) plays an important role in the commercialization of fuel cells. Herein, we reported a facile method to synthesize Fe–N co-doped porous carbon (Fe–N/C) by using green media ionic liquids 1-butyl-3-methylimidazolium tetrachloridoferrate ([Bmim][FeCl4]) as precursor of C, N, and Fe, and spherical silica as a template through one-step pyrolysis. Electrochemical measurements show that Fe–N/C800 possesses excellent ORR catalytic activity. The onset potential and half-wave potential are 0.964 and 0.821 V, respectively, which is close to those on the commercial Pt/C catalyst. Moreover, it exhibits better methanol tolerance and durability in comparison with the Pt/C catalyst. Good performance of Fe–N/C800 in ORR is attributed to its abundant porous structure, large BET surface area, and the synergism of Fe and N dopants.
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Polymers
·
2018
·Vol. 10
·期 8
·917
·
IF 2.935
Wensi Li,Dengxu Wang,Dongdong Han,Ruixue Sun,Jie Zhang,Shengyu Feng
In this paper, two different models of hybrid ionic liquids (ILs) based on polyhedral oligomeric silsesquioxanes (POSSs) have been prepared. Additionally, these ILs based on POSSs (ILs-POSSs) exhibited excellent thermal stabilities and low glass transition temperatures.1H,13C, and29Si nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) were used to confirm the structures of the IL-POSSs. Furthermore, the spherical vesicle structures of two IL-POSSs were observed and were caused by self-assembly behaviors. In addition, we found it very meaningful that these two ILs showed lower detection limits of 2.57 × 10−6and 3.98 × 10−6mol/L for detecting picric acid (PA). Moreover, the experimental data revealed that the products have high sensitivity for detecting a series of nitroaromatic compounds—including 4-nitrophenol, 2,4-dinitrophenol, and PA—and relatively comprehensive explosive detection in all of the tests of IL-POSSs with nitroaromatic compounds thus far. Additionally, the data indicate that these two new ILs have great potential for the detection of explosives. Therefore, our work may provide new materials including ILs as fluorescent sensors in detecting nitroaromatic explosives.Keywords:fluorescent sensors;nitroaromatic explosives;polyhedral oligomeric silsesquioxane-based ionic liquids;self-assembly behaviors;thiol-ene ‘click’ reaction
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APPLIED ENERGY
·
2018
·
IF 7.9
Heng Zhang,Hu Li,Hu Pan,Anping Wang,Sadra Souzanchi,Chunbao (Charles) Xu,Song Yang
Biodiesel, typically produced from non-food crops with heterogeneous catalysts, deems to be a promising and sustainable alternative biofuel to petroleum-derived fuels. In this study, to improve biodiesel production process efficiency by acids, biodiesel production were successfully developed using a series of magnetically acidic poly(ionic liquid) catalysts with varying hydrophobicity and controllable acidity. The detailed characterization results demonstrated that the FnmS-PIL (1a, C8) core-shell structure catalyst had large Bruner Emmett and Teller (BET) surface area (128.1 m 2 /g), uniform mesoporous structure (4.2 nm), strong magnetism (12.4 emu/g), a high number of acid sites (2.14 mmol/g), strong acid strength (strong electron-withdrawing anion CF 3 SO 3 − effect, −8.2 < H 0 < −5.6) and strong hydrophobicity (water contact angle, 115.4°). For the biodiesel production, high biodiesel yields could be achieved by the esterification of oleic acid (by response surface methodology, RSM) and (trans)esterification of crude Euphorbia lathyris L. oils with an acid value of 24.59 mg KOH/g (by single factor optimization). Furthermore, a relative kinetic study was conducted wherein the activation energy was calculated as 39.2 kJ/mol and a pseudo-first-order model was determined for esterification. More importantly, the FnmS-PIL (1a, C8) catalyst was separated simply using a magnet and exhibited constant activity with biodiesel yield of 87.5% after five cycles in (trans)esterification. In addition, the biodiesel yield was maintained above 90% even with a water content of 6 wt% with respect to crude Euphorbia lathyris L. oils, and the fuel properties of Euphorbia lathyris L. biodiesel were found to satisfy the EN 14212 and ASTM D6751 standards, highlighting its potential in industrial biodiesel production as derived from crude non-food oil resources.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Nannan Sun,Kaisheng Yao,Chao Wang,Chenchen Zhao,Weiwei Lu,Shuang Zhao,Huiyong Wang,Jianji Wang
Developing a simple and green route for the controlled synthesis of hierarchical nanomaterials with anisotropic particles as subunits is highly desirable and technically important. Here, a functionalized ionic liquid (FIL) assisted strategy is developed for the preparation of hierarchical Au nanomaterials at room temperature. Various morphologies of Au products, including nanoplate-built flowers, nanobar-built flowers and nanourchins, have been well achieved using the current route in aqueous solutions of imidazolium ILs with different functional groups, such as 1-carboxymethy-3-methylimidazolium chloride ([CMmim]Cl), 1-hydroxylethyl- 3-methylimidazolium chloride ([HEmim]Cl), and 1-(3-aminopropyl)-3- methylimidazolium chloride ([APmim]Cl). The influence of these FILs on the morphology of Au products and their growth process has been studied systematically. It is shown that the functionalized ILs play important roles in the construction of these interesting Au hierarchies. The seed, IL concentration (within a certain range), reaction temperature have negligible influence, but stirring and anions of the ILs have important influences, on the product morphologies. Based on these results, the possible growth mechanism is proposed for the formation of different Au hierarchies. In addition, all the Au samples prepared with the assistance of the functionalized ILs, especially the nanoplate-built flowers, exhibit striking SERS sensitivity and high reproducibility.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2014
·
IF 2.045
Kelei Zhuo,Hao Ren,Yujing Wei,Yujuan Chen,Jingjing Ma
Activity coefficients of the 1-alkyl-3-methylimidazolium bromide [Cnmim]Br (n = 3 to 8) ionic liquids (ILs) in fructose + water mixed solvents at 298.15 K were determined by cell potential measurements. The molalities of [Cnmim]Br ranged from (0.005 to 0.1) mol·kg–1 and those of fructose from (0.2 to 0.8) mol·kg–1. Gibbs free energy interaction parameters were also obtained together with salt constants. The interactions between [Cnmim]Br and fructose are mainly controlled by electrostatic interactions. Gibbs free energy interaction parameters (gES) and salting constants (kS) are negative for the ILs (n = 3 to 6), indicating fructose are salted-in by the ILs in water, whereas fructose are salted-out by the ILs (n = 7 and 8).
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危险品化学品经营许可证（带存储）