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MOFs-based porous liquids for CO_(2) capture and utilization 被引量:2
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作者 Xun Wang Yuxi Liu +3 位作者 Hongxing Dai Zhen Wei Shaohua Xie Jiguang Deng 《Green Energy & Environment》 2025年第8期1674-1691,共18页
Due to the greenhouse effect caused by carbon dioxide(CO_(2))emission,much attention has been paid for the removal of CO_(2).Porous liquids(PLs),as new type of liquid materials,have obvious advantages in mass and heat... Due to the greenhouse effect caused by carbon dioxide(CO_(2))emission,much attention has been paid for the removal of CO_(2).Porous liquids(PLs),as new type of liquid materials,have obvious advantages in mass and heat transfer,which are widely used in gas adsorption and sep-aration.Metal–organic frameworks(MOFs)with merits like large surface area,inherent porous structure and adjustable topology have been considered as one of the best candidates for PLs construction.This review presents the state-of-the-art status on the fabrication strategy of MOFs-based PLs and their CO_(2) absorption and utilization performance,and the positive effects of porosity and functional modification on the absorption-desorption property,selectivity of target product,and regeneration ability are well summarized.Finally,the challenges and prospects for MOFs-based PLs in the optimization of preparation,the coupling of multiple removal techniques,the in situ characterization methods,the regeneration and cycle stability,the environmental impact as well as expansion of application are proposed. 展开更多
关键词 MOFs-based porous liquids Carbon dioxide CAPTURE Catalytic conversion
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Unravelling the prospects of electrolytes containing ionic liquids and deep eutectic solvents for next generation lithium batteries 被引量:1
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作者 Shivani Ramesh Chand Thakur +2 位作者 Akhil Thakur Akshay Sharma Renuka Sharma 《Journal of Energy Chemistry》 2025年第6期482-500,I0012,共20页
The rising need for efficient and sustainable energy storage systems has led to increased interest in the use of advanced electrolytes consisting of deep eutectic solvents(DESs) and ionic liquids(ILs).These electrolyt... The rising need for efficient and sustainable energy storage systems has led to increased interest in the use of advanced electrolytes consisting of deep eutectic solvents(DESs) and ionic liquids(ILs).These electrolytes are appealing candidates for supercapacitors,next-generation lithium-ion batteries,and different energy storage systems because of their special features including non-flammability,low volatility,lowtoxicity,good electrochemical stability,and good thermal and chemical stability.This review explores the advantages of the proposed electrolytes by examining their potential to address the critical challenges in lithium battery technology,including safety concerns,energy density limitations,and operational stability.To achieve this,a comprehensive overview of the lithium salts commonly employed in rechargeable lithium battery electrolytes is presented.Moreover,key physicochemical and functional attributes of ILs and DESs,such as electrochemical stability,ionic conductivity,nonflammability,and viscosity are also discussed with a focus on how these features impact battery performance.The integration of lithium salts with ILs and DESs in modern lithium battery technologies,including lithium-ion(Li-ion) batteries,lithium-oxygen(Li-O_(2)) batteries,and lithium-sulfur(Li-S) batteries,are further examined in the study.Various electrochemical performance metrics including cycling stability,charge/discharge profiles,retention capacity and battery's couiombic efficiency(CE) are also analyzed for the above-mentioned systems.By summarizing recent advances and challenges,this review also highlights the potential of electrolytes consisting of DESs and ILs to enhance energy density,durability,and safety in future energy storage applications.Additionally future research directions,including the molecular optimization of ILs and DESs,optimizing lithium salt compositions,and developing scalable synthesis methods to accelerate their practical implementation in next-generation energy storage applications are also explored. 展开更多
关键词 Electrolytes Deepeutectic solvents lonic liquids Lithium salts Electrochemical performance Lithium batteries
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Efficient fixation of CO_(2) to cyclic carbonates and oxazolidinones with multi-hydroxyl bis-(quaternary ammonium) ionic liquids as catalysts under mild conditions
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作者 BAI Yumeng YANG Haijian 《中南民族大学学报(自然科学版)》 CAS 2025年第1期1-8,共8页
A series of multi-hydroxyl bis-(quaternary ammonium)ionic liquids(Ils1‒7)was prepared as bifunctional catalysts for the chemical fixation of CO_(2).All these ionic liquid compounds were efficient for the catalytic syn... A series of multi-hydroxyl bis-(quaternary ammonium)ionic liquids(Ils1‒7)was prepared as bifunctional catalysts for the chemical fixation of CO_(2).All these ionic liquid compounds were efficient for the catalytic synthesis of cyclic carbonates and oxazolidinones via the cycloaddition reactions between CO_(2) and epoxides or aziridines with excellent yield and high selectivity in the absence of co-catalyst,metal and solvent.Due to the synergistic effects of hydroxyl groups and halogen anion,the cycloaddition reactions proceeded smoothly either at atmospheric pressure or room temperature.The selectivity for substituted oxazolidinones at 5-and 4-positions can be tuned via changing the reaction conditions.Finally,possible mechanisms including the activation of both CO_(2) and epoxide or aziridines were proposed based on the literatures and experimental results. 展开更多
关键词 chemical conversion of CO_(2) multi-hydroxyl bis-(quaternary ammonium) ionic liquids
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Physicochemical design of magneto-responsive confined interfaces for manipulation of nonmagnetic liquids
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作者 Jing Liu Ming Li +3 位作者 Jian Zhang Xinyu Li Yuqing Zheng Xu Hou 《Chinese Chemical Letters》 2025年第8期231-239,共9页
Controllable liquid manipulation is of paramount scientific and technological importance in various fields,such as the chemical industry,biomedicine,and agricultural production.Magnetic actuation,characterized by rapi... Controllable liquid manipulation is of paramount scientific and technological importance in various fields,such as the chemical industry,biomedicine,and agricultural production.Magnetic actuation,characterized by rapid,contactless,and environmentally benign operation,has emerged as a promising approach for precise liquid control.However,conventional magnetic strategies typically govern droplet movement on open surfaces,facing limitations such as restricted liquid volumes,uncertain flow paths,and inevitable evaporation,thereby constraining their broader practical applications.Recently,a variety of magneticdriven strategies have been developed to dynamically regulate liquids within enclosed spaces,especially through physicochemical mechanisms.These approaches provide efficient control over liquid behavior by leveraging magnetically induced chemical changes,structural deformations,and dragging motions,opening new opportunities for flexible and versatile fluid management.This review explores the design and mechanisms of magneto-responsive confined interfaces for the manipulation of nonmagnetic liquids,highlighting key advancements and potential applications including liquid valves,liquid mixing,liquid flow regulation,and liquid pumping.Finally,the existing challenges and future prospects in this field are presented. 展开更多
关键词 Physicochemical design Magnetic response Confinedinterfaces Liquid manipulation Nonmagnetic liquids
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Recent Advances in Quantum Spin Liquids in Two-Dimensional Kagome System YCu_(3)(OH)_(6+x)X_(3-x)(X=Cl,Br)
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作者 Shiliang Li 《Chinese Physics Letters》 2025年第7期419-427,共9页
The two-dimensional kagome lattice serves as a prototypical platform for exploring quantum spin liquids owing to its pronounced geometric frustration.Substantial advancements have been achieved in herbertsmithite and ... The two-dimensional kagome lattice serves as a prototypical platform for exploring quantum spin liquids owing to its pronounced geometric frustration.Substantial advancements have been achieved in herbertsmithite and its structural analogs.These quantum spin liquid candidates exhibit large superexchange interactions yet resist magnetic ordering down to the lowest measurable temperatures,which are typically three or four orders of magnitude below the energy scale of the primary exchange energies.Nevertheless,the existence of unavoidable intrinsic interlayer magnetic impurities leads to persistent debates on their ground states.A breakthrough emerged with the discovery of YCu_(3)(OH)_(6+x)X_(3-x)(X=Cl,Br),a novel material family rigorously verifed to eliminate magnetic impurity interference.This short review highlights critical advances in these materials,emphasizing experimental signatures consistent with a Dirac quantum spin liquid and the observation of a oneninth magnetization plateau and possible quantum oscillations.Local structural characteristics play a crucial role in clarifying the complex emergent quantum phenomena of these materials.Collectively,these fndings establish this material class as a promising platform for investigating quantum spin liquid behavior in two-dimensional kagome lattices. 展开更多
关键词 two dimensional kagome system magnetic impurities superexchange interactions quantum spin liquid ycu oh x x x quantum spin liquids kagome lattice magnetic ordering
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Hyperbolic Plasmons in Coupled Luttinger Liquids of Homochiral Carbon Nanotube Arrays
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作者 Saiqun Ma Jiajun Chen +17 位作者 Cheng Hu Kunqi Xu Yufeng Xie Xingdong Luo Zhenghan Wu Yi Chen Xianliang Zhou Shuo Lou Bosai Lyu Peiyue Shen Zhichun Zhang Aolin Deng Chengjia Zhang Qi Liang Ming Tian Neng Wan Ji-Hun Kang Zhiwen Shi 《Chinese Physics Letters》 2025年第9期224-245,共22页
A Luttinger liquid is a theoretical model describing interacting electrons in one-dimensional(1D)conductors.While individual 1D conductors have shown interesting Luttinger-liquid behaviors such as spin-charge separati... A Luttinger liquid is a theoretical model describing interacting electrons in one-dimensional(1D)conductors.While individual 1D conductors have shown interesting Luttinger-liquid behaviors such as spin-charge separation and power-law spectral density,the more interesting phenomena predicted in coupled Luttinger liquids of neighboring 1D conductors have been rarely observed due to the difficulty in creating such structures.Recently,we have successfully grown close-packed carbon nanotube(CNT)arrays with uniform chirality,providing an ideal material system for studying the coupled Luttinger liquids.Here,we report on the observation of tunable hyperbolic plasmons in the coupled Luttinger liquids of CNT arrays using scanning near-field optical microscopy.These hyperbolic plasmons,resulting from the conductivity anisotropy in the CNT array,exhibit strong spatial confinement,in situ tunability,and a wide spectral range.Despite their hyperbolic wavefronts,the plasmon propagation in the axial direction still adheres to the Luttinger-liquid theory.Our work not only demonstrates a fascinating phenomenon in coupled Luttinger liquids for fundamental physics exploration,but also provides a highly confined and in situ tunable hyperbolic plasmon in close-packed CNT arrays for future nanophotonic devices and circuits. 展开更多
关键词 interacting electrons carbon nanotube arrays hyperbolic plasmons luttinger liquid scanning near field optical microscopy d conductors carbon nanotube cnt arrays coupled Luttinger liquids
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Homogeneous catalysis and heterogeneous separation:Ionic liquids as recyclable photocatalysts for hydroacylation of olefins
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作者 Hao-Cong Li Ming Zhang +4 位作者 Qiyan Lv Kai Sun Xiao-Lan Chen Lingbo Qu Bing Yu 《Chinese Chemical Letters》 2025年第2期389-393,共5页
The photoinduced ligand-to-metal charge transfer(LMCT)process has been extensively investigated,however,the recovery of photocatalysts has remained a persistent challenge in the field.In light of this issue,a novel ap... The photoinduced ligand-to-metal charge transfer(LMCT)process has been extensively investigated,however,the recovery of photocatalysts has remained a persistent challenge in the field.In light of this issue,a novel approach involving the development of iron-based ionic liquids as photocatalysts has been pursued for the first time,with the goal of simultaneously facilitating the LMCT process and addressing the issue of photocatalyst recovery.Remarkably,the iron-based ionic liquid 1-butyl-3-methylimidazolium tetrachloroferrate(C_(4)mim-Fe Cl_(4))demonstrates exceptional recyclability and stability for the photocatalytic hydroacylation of olefins.This study will pave the way for new approaches to photocatalytic organic synthesis using ionic liquids as recyclable photocatalysts. 展开更多
关键词 LMCT Ionic liquids Homogeneous catalysis Heterogeneous separation Recyclable photocatalysts
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Polyamide Composite Membranes on Electrospun Nanofibers for Osmotic Enrichment of Ionic Liquids from Aqueous Solutions
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作者 Yu-Jie Shang Bian-Bian Guo +2 位作者 Hao-Nan Li Yong-Jin Li Jing Yang 《Chinese Journal of Polymer Science》 2025年第5期819-827,共9页
The recovery of ionic liquids(ILs)has attracted growing attention as an indispensable process in“green”industrial applications.Forward osmosis(FO)has proven to be a sustainable method for concentrating the very dilu... The recovery of ionic liquids(ILs)has attracted growing attention as an indispensable process in“green”industrial applications.Forward osmosis(FO)has proven to be a sustainable method for concentrating the very dilute aqueous solutions of ILs at ambient temperature,in which semi-permeable membranes play a vital role in determining the recovery efficiency.Herein,we use interfacial polymerization method to prepare thin-film composite membranes consisting of polyamide skin layer and electrospun nanofibrous substrate with tunable water permeability and IL selectivity for osmotic enrichment of imidazolium ILs from their dilute aqueous solutions through FO process.The resulting FO membrane shows a compact polyamide layer with a thickness of 30-200 nm,guranteeing a high selectivity to ILs and water.Meanwhile,the nanofibrous substrate with large and interconnect pores as well as low tortuosity,providing mechanical and permeable support for the composite membranes.IL structure influences the osmotic pressure difference as well as the interactions with polyamide layer of the membrane and thus determines the whole concentration process.First,the alkyl chain growth augments the osmosis pressure difference between the ILs solution and draw solution,resulting in an enhancement in driving force of water osmosis and IL enrichment.Moreover,alkyl length aggravates external concentration polarization caused by the enhanced adsorption of ILs onto the skin layer via electrostatic and alkyl-πinteractions.Meanwhile,such adsorbed ILs further enhance the IL retention but decrease the reverse salt diffusion.Therefore,imidazolium ILs with varied alkyl lengths are ultimately enriched with a 100-fold increase in concentration from their dilute aqueous solutions with high IL/NaCl rejection and low IL loss.Remarkably,the final concentration of IL with longest alkyl length reaches the highest(6.4 mol·L^(-1)).This work provides the insights in respect to material preparation and process amelioration for IL recovery with high scalability at mild conditions. 展开更多
关键词 Thin-film composite membrane Forward osmosis Ionic liquids Interfacial polymerization Electrospun nanofiber
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Corrigendum to“Mean-Squared Energy Difference for Exploring Potential Energy Landscapes of Supercooled Liquids”
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作者 D.M.Zhang D.Y.Sun X.G.Gong 《Chinese Physics Letters》 2025年第5期248-248,共1页
Equations(2)and(6)and the corresponding discussion in the paper[Chin.Phys.Lett.42,056301(2025)]have been corrected.These modiffcations do not affect the results derived in the paper.
关键词 potential energy landscapes EQUATIONS CORRECTIONS mean squared energy difference supercooled liquids
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A dynamic crossover with possibly universal dynamic signatures in simple glass-forming liquids
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作者 Yiming Zheng Mingyu Zhu +2 位作者 Licun Fu Pengfei Guan Lijin Wang 《Chinese Physics B》 2025年第11期180-185,共6页
On approaching the glass transition,the structural relaxation of glass-forming liquids slows down drastically,along with a significant growth of dynamic heterogeneity.Recent studies have achieved substantial advanceme... On approaching the glass transition,the structural relaxation of glass-forming liquids slows down drastically,along with a significant growth of dynamic heterogeneity.Recent studies have achieved substantial advancements in elucidating the quantitative correlations between structural relaxation and dynamic heterogeneity.Here,we present the discovery of a novel dynamic crossover with possibly universal dynamic signatures by investigating the relationship between structural relaxation and dynamic heterogeneity.Specifically,the structural relaxation time at the dynamic crossoverτ_(c)is equal to the time scale for the maximum non-Gaussian parameter,which could serve as a quantitative characterization of dynamic heterogeneity.The degree of dynamic heterogeneity at the crossover is approximately equivalent across all investigated glass-forming liquids,leading to a scaling collapse between structural relaxation and dynamic heterogeneity.Moreover,the mean squared displacement at the structural relaxation time is nearly constant across different temperatures as long as the structural relaxation time does not exceedτ_(c).We further observe that the temperature at the dynamic crossover is lower than the onset temperature of slow dynamics.Our findings thus suggest the existence of a novel dynamic crossover with possibly universal dynamic signatures in glass-forming liquids,which merits in-depth investigations. 展开更多
关键词 glass-forming liquids dynamic heterogeneity structural relaxation glassy dynamics
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Application of new tetra-cationic imidazolium ionic liquids for capture and conversion of CO_(2)to amphiphilic calcium carbonate nanoparticles as a green additive in water based drilling fluids
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作者 Ayman M.Atta Eman A.Ghiaty +2 位作者 Samir H.Shafek Abeer A.El-Segaey Amany K.Gaffer 《Journal of Environmental Sciences》 2025年第4期159-176,共18页
Conversion and capture of carbon pollutants based on carbon dioxide to valuable green oil-field chemicals are target all over the world for controlling the global warming.The present article used new room temperature ... Conversion and capture of carbon pollutants based on carbon dioxide to valuable green oil-field chemicals are target all over the world for controlling the global warming.The present article used new room temperature amphiphilic imidazolium ionic liquids with superior surface activity in the aqueous solutions to convert carbon dioxide gas to superior amphiphilic calcium carbonate nanoparticles.In this respect,tetra-cationic ionic liquids 2-(4-dodecyldimethylamino)phenyl)-1,3-bis(3-dodecyldimethylammnonio)propyl)bromide-1-H-imidazol-3-ium acetate and 2-(4-hexyldimethylamino)phenyl)-1,3-bis(3-hexcyldimethylammnonio)propyl)bromide-1 H-imidazol-3-ium acetate were prepared.Their chemical structures,thermal as well as their carbon dioxide absorption/desorption characteristicswere evaluated.Theywere used as solvent and capping agent to synthesize calcium carbonate nanoparticles with controlled crystalline lattice,sizes,thermal properties and spherical surface morphologies.The prepared calcium carbonate nanoparticles were used as additives for the commercial water based drilling mud to improve their filter lose and rheology.The data confirm that the lower concentrations of 2-(4-dodecyldimethylamino)phenyl)-1,3-bis(3-dodecyldimethylammnonio)propyl)bromide-1-H-imidazol-3-ium acetate achieved lower seawater filter lose and improved viscosities. 展开更多
关键词 AMPHIPHILIC IMIDAZOLIUM Ionic liquids(ILS) Water based drilling fluids Calcium carbonate nanoparticles Carbon dioxide capture and CONVERSION
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Intelligent prediction of ionic liquids and deep eutectic solvents by machine learning
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作者 Yuan Tian Honghua Zhang +3 位作者 Yueyang Qiao Han Yang Yanrong Liu Xiaoyan Ji 《Chinese Journal of Chemical Engineering》 2025年第8期227-243,共17页
Ionic liquids (ILs) and deep eutectic solvents (DESs) as green solvents have attracted dramatic attention recently due to their highly tunable properties. However, traditional experimental screening methods are ineffi... Ionic liquids (ILs) and deep eutectic solvents (DESs) as green solvents have attracted dramatic attention recently due to their highly tunable properties. However, traditional experimental screening methods are inefficient and resource-intensive. The article provides a comprehensive overview of various ML algorithms, including artificial neural network (ANN), support vector machine (SVM), random forest (RF), and gradient boosting trees (GBT), etc., which have demonstrated exceptional performance in handling complex and high-dimensional data. Furthermore, the integration of ML with quantum chemical calculations and conductor-like screening model-real solvent (COSMO-RS) has significantly enhanced predictive accuracy, enabling the rapid screening and design of novel solvents. Besides, recent ML applications in the prediction and design of ILs and DESs focused on solubility, melting point, electrical conductivity, and other physicochemical properties become more and more. This paper emphasizes the potential of ML in solvent design, overviewing an efficient approach to accelerate the development of sustainable and high-performance materials, providing guidance for their widespread application in a variety of industrial processes. 展开更多
关键词 Intelligent prediction lonic liquids Deep eutectic solvents Machine learning
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Scalable metal-based nanoparticle synthesis via laser ablation in liquids for transformative sensory and synaptic devices
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作者 Jun-Gyu Choi Seokhyeon Baek +1 位作者 Junghoon Lee Sungjun Park 《International Journal of Extreme Manufacturing》 2025年第6期2-26,共25页
Artificial sensory systems(ASS)are pivotal to next-generation extended reality technologies,now evolving into flexible platforms for comfortable wear and immersive user experiences,while ensuring high performance and ... Artificial sensory systems(ASS)are pivotal to next-generation extended reality technologies,now evolving into flexible platforms for comfortable wear and immersive user experiences,while ensuring high performance and operational reliability.To address these demands,metal-based nanoparticles(NPs),such as noble metal,oxide,and multi-elemental NPs,have been extensively incorporated into functional materials of sensory and synaptic devices due to their tunable optical,electrical,and chemical properties,enhancing sensory precision,stability,and environmental adaptability.However,traditional NP fabrication methods often involve complex processing,residual contaminants,and scalability issues,limiting their effectiveness in ASS applications.State-of-the-art laser ablation in liquids(LAL)presents a promising alternative,offering scalable production of surfactant-free NPs with customizable physicochemical properties,though their application in electronics remains underexplored.This review delves into the transformative potential of LAL-fabricated NPs in ASS,covering the fundamental mechanisms of LAL,the role of process parameters,the derivative strategies for size modulation,the diversity of metal-based NPs,their applications in sensory and synaptic devices,and the challenges and perspectives for meeting industrial standards.Bridging the gap between LAL and ASS is poised to revolutionize both industrial manufacturing and academic research by offering scalable solutions to overcome intrinsic tradeoffs between flexibility and performance,fostering innovations in human-centric,immersive electronics. 展开更多
关键词 laser ablation in liquids NANOPARTICLES artificial perceptual sensors synaptic devices
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Utilizing electronic assisted enhancement:An innovative approach for studying the thermal decomposition and combustion of ionic liquids
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作者 Cailing Zhang Yutao Wang +5 位作者 Baiquan Chen Zhenguo Pang Hongqi Nie Quan Zhu Peijin Liu Wei He 《Defence Technology(防务技术)》 2025年第2期179-189,共11页
Flammable ionic liquids exhibit high conductivity and a broad electrochemical window,enabling the generation of combustible gases for combustion via electrochemical decomposition and thermal decomposition.This charact... Flammable ionic liquids exhibit high conductivity and a broad electrochemical window,enabling the generation of combustible gases for combustion via electrochemical decomposition and thermal decomposition.This characteristic holds significant implications in the realm of novel satellite propulsion.Introducing a fraction of the electrical energy into energetic ionic liquid fuels,the thermal decomposition process is facilitated by reducing the apparent activation energy required,and electrical energy can trigger the electrochemical decomposition of ionic liquids,presenting a promising approach to enhance combustion efficiency and energy release.This study applied an external voltage during the thermal decomposition of 1-ethyl-3-methylimidazole nitrate([EMIm]NO_(3)),revealing the effective alteration of the activation energy of[EMIm]NO_(3).The pyrolysis,electrochemical decomposition,and electron assisted enhancement products were identified through Thermogravimetry-Differential scanning calorimetry-Fourier transform infrared-Mass spectrometry(TG-DSC-FTIR-MS)and gas chromatography(GC)analyses,elucidating the degradation mechanism of[EMIm]NO_(3).Furthermore,an external voltage was introduced during the combustion of[EMIm]NO_(3),demonstrating the impact of voltage on the combustion process. 展开更多
关键词 Flammable ionic liquids Kinetic methods Electron assisted enhanced thermal decomposition Electron assisted enhanced combustion
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Graph-Dynamics correspondence in metallic glass-forming liquids
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作者 Xin-Jia Zhou Feng Yang +2 位作者 Xiao-Dong Yang Lin Ma Zhen-Wei Wu 《Communications in Theoretical Physics》 2025年第9期195-209,共15页
The theoretical challenges in understanding the nature of glass and glass transition raise significant questions in statistical and condensed matter physics.As a prototypical example of complex physical systems,glasse... The theoretical challenges in understanding the nature of glass and glass transition raise significant questions in statistical and condensed matter physics.As a prototypical example of complex physical systems,glasses and the vitrification process have been central research topics,consistently attracting broad scientific interest.This focus has driven extensive studies on phenomena such as aging,non-exponential relaxation,dynamic anomalies,glass-forming ability,and the mechanical response of glasses under stress.Recent advances in computational and experimental techniques have enabled rigorous testing of theoretical models,shedding new light on glass behavior.However,the intrinsic complexity of glass and the glass transition that lies in their physics,which spans multiple length and time scales,makes the system challenging to characterize.In this review,we emphasize the need to move beyond conventional approaches and propose a topological perspective as a promising alternative to address these challenges.Specifically,our findings reveal that the diversity in particle relaxation behavior is statistically linked to a global topological feature of the transient network structures formed by the particles in a given liquid.This direction offers opportunities to uncover novel phenomena that could fundamentally reshape our understanding of glassy materials. 展开更多
关键词 supercooled liquids graph theory structure-dynamics relationships
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Mean-Squared Energy Difference for Exploring Potential Energy Landscapes of Supercooled Liquids
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作者 D.M.Zhang D.Y.Sun X.G.Gong 《Chinese Physics Letters》 2025年第5期80-86,共7页
By extending the concept of diffusion to the potential energy landscapes(PELs), we introduce the meansquared energy difference(MSED) as a novel quantity to investigate the intrinsic properties of supercooled liquids. ... By extending the concept of diffusion to the potential energy landscapes(PELs), we introduce the meansquared energy difference(MSED) as a novel quantity to investigate the intrinsic properties of supercooled liquids. MSED can provide a clear description of the “energy relaxation” process on a PEL. Through MSED analysis, we have obtained a characteristic time similar to that derived from structure analysis, namely τ_(α)^(*).Further, we establish a connection between MSED and the feature of PELs, providing a concise and quantitative description of PELs. The relaxation behavior of energy has been found to follow a stretched exponential form.As the temperature decreases, the roughness of the accessible PEL changes significantly around a characteristic temperature T_(x), which is 20% higher than the glass transition temperature T_(g) and is comparable to the critical temperature of the mode-coupling theory. More importantly, one of the PEL parameters is closely related to the Adam–Gibbs configurational entropy. The present research, which directly links the PEL to the relaxation process, provides avenues for further research of glasses. 展开更多
关键词 potential energy landscapes meansquared energy difference potential energy landscapes pels structure analysis characteristic time investigate intrinsic properties supercooled liquids relaxation process meansquared energy difference msed
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Constructing ether-rich and carboxylate hydrogen bonding sites in protic ionic liquids for efficient and simultaneous membrane separation of H_(2)S and CO_(2) from CH_(4) 被引量:1
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作者 Ping Zhang Xingyun Ma +3 位作者 Zhuoheng Tu Xiaomin Zhang Xingbang Hu Youting Wu 《Green Energy & Environment》 2025年第3期560-572,共13页
Removing H_(2)S and CO_(2)is of great significance for natural gas purification.With excellent gas affinity and tunable structure,ionic liquids(ILs) have been regarded as nontrivial candidates for fabricating polymer-... Removing H_(2)S and CO_(2)is of great significance for natural gas purification.With excellent gas affinity and tunable structure,ionic liquids(ILs) have been regarded as nontrivial candidates for fabricating polymer-based membranes.Herein,we firstly reported the incorporation of protic ILs (PILs) having ether-rich and carboxylate sites (ECPILs) into poly(ether-block-amide)(Pebax) matrix for efficient separation H_(2)S and CO_(2)from CH_(4).Notably,the optimal permeability of H_(2)S reaches up to 4310 Barrer (40C,0.50 bar) in Pebax/ECPIL membranes,along with H_(2)S/CH_(4)and (H_(2)StCO_(2))/CH_(4)selectivity of 97.7 and 112.3,respectively.These values are increased by 1125%,160.8%and 145.9%compared to those in neat Pebax membrane.Additionally,the solubility and diffusion coefficients of the gases were measured,demonstrating that ECPIL can simultaneously strengthen the dissolution and diffusion of H_(2)S and CO_(2),thus elevating the permeability and permselectivity.By using quantum chemical calculations and FT-IR spectroscopy,the highly reversible multi-site hydrogen bonding interaction between ECPILs and H_(2)S was revealed,which is responsible for the fast permeation of H_(2)S and good selectivity.Furthermore,H_(2)S/CO_(2)/CH_(4)(3/3/94 mol/mol) ternary mixed gas can be efficiently and stably separated by Pebax/ECPIL membrane for at least 100 h.Overall,this work not only illustrates that PILs with ether-rich and carboxylate hydrogen bonding sites are outstanding materials for simultaneous removal of H_(2)S and CO_(2),but may also provide a novel insight into the design of membrane materials for natural gas upgrading. 展开更多
关键词 H_(2)S Protic ionic liquid Multi-site hydrogen bonding interaction Membrane separation Natural gas purification
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Electrodeposition of Al on AZ31 magnesium alloy in TMPAC-AlCl_3 ionic liquids 被引量:6
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作者 刘奎仁 柳泉 +1 位作者 韩庆 涂赣峰 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第9期2104-2110,共7页
Aluminum was electrodeposited with constant current on AZ31 magnesium alloy pretreated under optimized conditions from trimethyl-phenyl-ammonium chloride and anhydrous aluminum chloride (TMPAC-AlCl3) quaternary ammo... Aluminum was electrodeposited with constant current on AZ31 magnesium alloy pretreated under optimized conditions from trimethyl-phenyl-ammonium chloride and anhydrous aluminum chloride (TMPAC-AlCl3) quaternary ammonium room temperature ionic liquids with benzene as a co-solvent. The corrosion resistance of the as-deposited Al layers was evaluated in 3.5% NaCl solution by the electrochemical technologies. The Al depositions were characterized by scanning electron microscopy equipped with energy dispersion X-ray. The results show that the microstructures of the Al depositions have spherical equiaxed grains obtained at a high current density, and bulk grains at a low current density. The Al deposition obtained at 12.3 mA/cm2 has a smooth and compact surface. The electrochemical measurements indicate that the thicker Al deposition can more effectively protect the Mg substrate. The Al deposition with bulk grains hardly protects the AZ31 Mg substrate from corrosion owing to its porosity. 展开更多
关键词 magnesium alloy ELECTRODEPOSITION ionic liquids ALUMINUM CORROSION
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Surface pretreatment of Mg alloys prior to Al electroplating in TMPAC-AlCl_3 ionic liquids 被引量:5
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作者 柳泉 刘奎仁 +1 位作者 韩庆 涂赣峰 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第9期2111-2116,共6页
It is difficult to directly electroplate Al on Mg alloys. The effects of pretreatment parameters on the corrosion resistance of films obtained on AZ31 Mg alloy surface were studied by using potentiodynamic polarizatio... It is difficult to directly electroplate Al on Mg alloys. The effects of pretreatment parameters on the corrosion resistance of films obtained on AZ31 Mg alloy surface were studied by using potentiodynamic polarization curves, to produce a compact interfacial layer as zinc-immersion deposition. After the substrate was pretreated under optimized conditions, aluminum was electrodeposited on AZ31 from TMPAC-AlCl3 room temperature ionic liquids. The depositions were characterized by scanning electron microscope equipped with energy dispersion X-ray. The results show that the traditional pretreatment of Mg alloys was successfully used for the Al-electroplating process from TMPAC-AlCl3 ionic liquids. The entire procedure includes alkaline cleaning, chemical pickling, surface activation (400 mL/L HF acid, 10 min), zinc-immersion (20 min) and anhydrous treatment. A relatively compact zinc-immersion film was prepared on the substrate surface. A silvery-colored satin aluminum deposition was obtained on AZ31 from TMPAC-AlCl3 using direct current plating. 展开更多
关键词 magnesium alloys ELECTROPLATING pretreatment procedure ALUMINUM ionic liquids
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Poly(ionic liquids-acrylic acid)-modified MIL-101(Cr)metal-organic frameworks:Preparation and efficient adsorption of europium
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作者 Xiayu Liang Aylin M.Deliormanli Qingle Zeng 《Journal of Rare Earths》 2025年第8期1736-1745,I0006,共11页
A novel composite material,Poly(IL-AA)@MIL-101(Cr),combining metal-organic framework,polymeric ionic liquid and acrylic acid,was synthesized for the selective and efficient adsorption of rare earths europium(Ⅲ)(Eu3+)... A novel composite material,Poly(IL-AA)@MIL-101(Cr),combining metal-organic framework,polymeric ionic liquid and acrylic acid,was synthesized for the selective and efficient adsorption of rare earths europium(Ⅲ)(Eu3+).Characterization of the materials was carried out using techniques such as X-ray diffraction(XRD),Fourier transform infrared(FTIR),scanning electron microscopy-energy dispersive X-ray spectroscopy(SEM-EDS),thermogravimetric analysis(TGA)and Brunauer-Emmett-Teller(BET).The results demonstrate successful incorporation of the polymeric ionic liquid onto the material surface while preserving the crystal structure and mo rphology of MIL-101(Cr).Adsorption experiments were conducted to explore parameters including equilibrium pH,initial Eu3+concentration,and duration,with comprehensive analyses of adsorption kinetics,isotherms,and mechanisms.Findings reveal that Poly(IL1-AA)@MIL-101(Cr),Poly(IL3-AA)@MIL-101(Cr),and Poly(IL5-AA)@MIL-101(Cr)achieve adsorption equilibrium for Eu3+at approximately 9 h with an equilibrium pH of 6.2.The adso rption of Eu^(3+)predominantly follows a pseudo-second-order kinetic model and Langmuir isotherm adsorption model.Moreover,the prepared composite material exhibits superior adsorption selectivity for Eu^(3+)over other metal ions in the mixture(K^(+),Mg^(2+),Ni^(2+),Co^(2+),Zn^(2+),La^(3+),and Nd^(3+)).Even after five adsorption-desorption cycles,the composite material maintains satis factory adsorption performance. 展开更多
关键词 Metal-organic framework Ionic liquid Acrylic acid Rare earths EUROPIUM ADSORPTION
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