scholarly journals Investigation of Electrical Conductivity, Optical Property, and Stability of 2D MXene Nanofluid Containing Ionic Liquids

2020 ◽  
Vol 10 (24) ◽  
pp. 8943
Author(s):  
Balaji Bakthavatchalam ◽  
Khairul Habib ◽  
R. Saidur ◽  
Navid Aslfattahi ◽  
A. Rashedi
Keyword(s):  
Electrical Conductivity ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solar Radiation ◽  
Optical Potential ◽  
Radiation Absorption ◽  
Substantial Impact ◽  
Vis Spectroscopy ◽  
Absorption Potential ◽  
Solar Thermal Collectors

The addition of ionic liquids with MXene nanofluid has a substantial impact on the solar thermal collectors’ working fluid’s optical properties that effectively absorb and distribute solar radiation. Increased solar radiation absorption potential ensures that heats are transported more rapidly and effectively. This research endeavors to investigate the concept of accumulating solar energy via the usage of ionic liquid-based 2D MXene nanofluid (Ionanofluids) for solar applications. In this study, the optical potential of Diethylene Glycol/MXene nanofluid incorporated with 1-ethyl-3-methyl imidazolium octyl sulfate ([Emim][OSO4]) ionic liquid was extensively investigated with respect to MXene concentration (0.1 to 0.4 wt%) and time (first day and seventh day) through UV-Vis Spectroscopy. A two-step approach was employed to synthesize the proposed ionanofluids with nanoparticle concentrations from 0.1 to 0.4 wt%. In wavelengths between 240 to 790 nm, the effect of ionic liquids, MXene concentration, and dispersion stability played a significant part in enhancing the absorbance capacity of the formulated MXene based Ionanofluid. Furthermore, the increase in the concentration of MXene nanoparticles resulted in more absorbance peaks facilitating high light absorption. Finally, the electrical conductivity of the ionanofluids is also analyzed as MXene renders them promising for solar cell applications. The utmost electrical conductivity of the formulated fluids of 571 μS/cm (micro siemens per centimeter) was achieved at 0.4 wt% concentration.

Properties of Acetamide-Alanine Eutectic Ionic Liquid and its Application in Soil Heavy Metal Cd2+ Remediation

2020 ◽  
Vol 842 ◽  
pp. 115-120
Author(s):  
Bao You Liu ◽  
Feng Li ◽  
Jie Tian ◽  
Hui Long Yang
Keyword(s):  
Aqueous Solution ◽  
Electrical Conductivity ◽  
Heavy Metal ◽  
Surface Tension ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Extraction Efficiency ◽  
Soil Heavy Metal ◽  
Acid Aqueous Solution ◽  
Heavy Metal Cd

In order to explore the feasibility of a class of eutectic ionic liquids in soil heavy metal repair problems. The acetamide-alanine eutectic ionic liquid was prepared and its properties of density, viscosity, surface tension and electrical conductivity were measured, and it’s application effect of Cd2+ extraction in soil was studied. The results showed that the extraction amount of Cd2+ in soil by the acetamide-alanine eutectic ionic liquid with a concentration of 0.6 mol/L reached the maximum of 99.67%. The physical properties of a melamine-alanine eutectic ionic liquid having a concentration of 0.6 mol/L at a temperature range of 303.15 K-343.15 K were determined. The 0.6 mol/L acetamide-alanine eutectic ionic liquid was compared with the ionic liquid and the related organic acid aqueous solution prepared under the same conditions, and the acetamide-alanine eutectic prepared by the experiment was found to be eutectic. The ionic liquid has better extraction efficiency for heavy metal Cd2+ under the same conditions, and is a good soil heavy metal extractant.

Post-Synthetic Modification of Ionic Liquids Using Ligand-Exchange and Redox Coordination Chemistry

2020 ◽  
Author(s):  
Michael LeRoy ◽  
Austin Mroz ◽  
Jenna L. Mancuso ◽  
Aaron Miller ◽  
Allison Van Cleve ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Coordination Chemistry ◽  
Ligand Exchange ◽  
Covalent Bonding ◽  
Anion Coordination ◽  
Rheological Measurements ◽  
Vis Spectroscopy ◽  
Wide Range ◽  
Coordination Spheres

Ionic liquids (ILs) derive their useful properties from molecularly tunable compositions, but methods to diversify anion identities and probe ion speciation remain limited. Here, we demonstrate post-synthetic modification of perhalometallate anions to achieve ionic liquid-to-ionic liquid transformations. Rheological measurements of the metal-containing ILs indicate that minor alterations to anion coordination spheres induces considerable changes to IL viscosities. UV-vis spectra confirm the purities for most ILs, while revealing a surprising cation dependence of perchlorovanadate speciation and supramolecular structure. The intermolecular interactions studied here span a wide range from dispersion to covalent bonding, permitting their impact on IL viscosity to be decoupled and quantified. Together, synthetic strategies from coordination chemistry paired with conventional UV-vis spectroscopy provide a powerful tool for expanding IL compositions and investigating fundamental nanoscale behavior.

Post-Synthetic Modification of Ionic Liquids Using Ligand-Exchange and Redox Coordination Chemistry

2020 ◽  
Author(s):  
Michael LeRoy ◽  
Austin Mroz ◽  
Jenna L. Mancuso ◽  
Aaron Miller ◽  
Allison Van Cleve ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Coordination Chemistry ◽  
Ligand Exchange ◽  
Covalent Bonding ◽  
Anion Coordination ◽  
Rheological Measurements ◽  
Vis Spectroscopy ◽  
Wide Range ◽  
Coordination Spheres

Ionic liquids (ILs) derive their useful properties from molecularly tunable compositions, but methods to diversify anion identities and probe ion speciation remain limited. Here, we demonstrate post-synthetic modification of perhalometallate anions to achieve ionic liquid-to-ionic liquid transformations. Rheological measurements of the metal-containing ILs indicate that minor alterations to anion coordination spheres induces considerable changes to IL viscosities. UV-vis spectra confirm the purities for most ILs, while revealing a surprising cation dependence of perchlorovanadate speciation and supramolecular structure. The intermolecular interactions studied here span a wide range from dispersion to covalent bonding, permitting their impact on IL viscosity to be decoupled and quantified. Together, synthetic strategies from coordination chemistry paired with conventional UV-vis spectroscopy provide a powerful tool for expanding IL compositions and investigating fundamental nanoscale behavior.

Molecular dynamics simulations of mixtures of protic and aprotic ionic liquids

2016 ◽  
Vol 18 (34) ◽  
pp. 23932-23943 ◽  
Author(s):  
Borja Docampo-Álvarez ◽  
Víctor Gómez-González ◽  
Trinidad Méndez-Morales ◽  
Julio R. Rodríguez ◽  
Elena López-Lago ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Electrical Conductivity ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Molecular Dynamics Simulations ◽  
Conductivity Measurements ◽  
Protic Ionic Liquid ◽  
Dynamics Simulations ◽  
Experimental Density

Molecular dynamics simulations of mixtures of the protic ionic liquid EAN and the aprotic [EMIM][BF4] are reported and the results are compared with experimental density and electrical conductivity measurements.

Mapping the “Extra Solvent Power, ESP” of Ionic Liquids for Monomers, Polymers and Globular Nanoparticles

2017 ◽  
Author(s):  
Jose A. Pomposo
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Linear Polymers ◽  
Green Solvents ◽  
Ionic Polymers ◽  
First Time ◽  
Solvent Power

Understanding the miscibility behavior of ionic liquid (IL) / monomer, IL / polymer and IL / nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes, and to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of a three-component Flory-Huggins theory concerning the “Extra Solvent Power, ESP” of ILs when compared to traditional non-ionic solvents for monomeric solutes (case I), linear polymers (case II) and globular nanoparticles (case III) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to case I, II and III. Finally, a potential pathway to improve the miscibility of non-ionic polymers in ILs is also proposed.

Dynamics of Ion Locking in Doubly Polymerized Ionic Liquids

2020 ◽  
Author(s):  
Swati Arora ◽  
Julisa Rozon ◽  
Jennifer Laaser
Keyword(s):  
Dielectric Constant ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ion Pairs ◽  
Polymer Chains ◽  
Ion Motion ◽  
Charged Species ◽  
Broadband Dielectric Spectroscopy ◽  
Covalently Linked ◽  
Insight Into

<div>In this work, we investigate the dynamics of ion motion in “doubly-polymerized” ionic liquids (DPILs) in which both charged species of an ionic liquid are covalently linked to the same polymer chains. Broadband dielectric spectroscopy is used to characterize these materials over a broad frequency and temperature range, and their behavior is compared to that of conventional “singly-polymerized” ionic liquids (SPILs) in which only one of the charged species is attached to the polymer chains. Polymerization of the DPIL decreases the bulk ionic conductivity by four orders of magnitude relative to both SPILs. The timescales for local ionic rearrangement are similarly found to be approximately four orders of magnitude slower in the DPILs than in the SPILs, and the DPILs also have a lower static dielectric constant. These results suggest that copolymerization of the ionic monomers affects ion motion on both the bulk and the local scales, with ion pairs serving to form strong physical crosslinks between the polymer chains. This study provides quantitative insight into the energetics and timescales of ion motion that drive the phenomenon of “ion locking” currently under investigation for new classes of organic electronics.</div>

Ionic Liquid Assisted Synthesis of Some 2-Aminobenzenethiols

2019 ◽  
Vol 16 (7) ◽  
pp. 550-555
Author(s):  
Dinesh K. Jangid ◽  
Keshav L. Ameta ◽  
Surbhi Dhadda ◽  
Anjali Guleria ◽  
Prakash G. Goswami ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Comparative Study ◽  
Maximum Yield ◽  
Efficient Synthesis ◽  
Target Molecules ◽  
Presence And Absence

Ionic Liquid assisted efficient synthesis of some 2-aminobenzenethiols has been reported using three different Ionic Liquids (ILs) namely methylimidazolium tetrafluoroborate [MIM]+[BF4]−, methylimidazolium chloride [MIM]+[Cl]− and methylimidazolium nitrate [MIM]+[NO3]−. A comparative study has been carried out for the synthesis of target molecules in the presence and absence of IL, leading to conclusion that maximum yield has been observed with [MIM]+[BF4]−.

Dispersive Liquid-Liquid Microextraction Based on Ionic Liquid and Spectrophotometric Determination of Bilirubin in Biological Samples

2020 ◽  
Vol 16 (5) ◽  
pp. 652-659
Author(s):  
Asiye A. Avan ◽  
Hayati Filik
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Biological Samples ◽  
Urine Samples ◽  
Spectrophotometric Detection ◽  
Full Color ◽  
Dispersive Liquid Liquid Microextraction ◽  
Urine And Serum ◽  
Liquid Microextraction

Background: An Ionic Liquid-based based Dispersive Liquid-Liquid Microextraction (IL-DLLME) method was not applied to preconcentration and determination of bilirubin. Ionic Liquids (ILs) are new chemical compounds. In recent years, Ionic Liquids (ILs) have been employed as alternative solvents to toxic organic solvents. Due to these perfect properties, ILs have already been applied in many analytical extraction processes, presenting high extraction yield and selectivity for analytes. Methods: In this study, IL-DLLME was applied to biological samples (urine and serum) for the spectrophotometric detection of bilirubin. For bilirubin analysis, the full-color development was based on the reaction with periodate in the presence of hydrochloric acid. The high affinity of bilirubin for the ionic liquid phase gave extraction percentages above 98% in 0.3 M HCl solution. Results: Several IL-extraction parameters were optimized and room temperature ionic liquid 1-butyl- 1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and ethanol were used as extraction and disperser solution. The linear range was found in the range of 0.5-6.0 μM (0.3-3.5 μg mL-1) and the limits of detection of the proposed method was 0.5 μM (0.3 μg mL-1). The proposed method was applied for the preconcentration and separation of trace bilirubin in real urine samples. Also, the recoveries for bilirubin in spiked biological samples (urine and serum) were found to be acceptable, between 95-102%. Conclusion: The proposed IL-DLLMEapproach was employed for the enrichment and determination of trace levels of bilirubin in urine samples using NaIO4 as an oxidizing agent and Uv-vis spectrophotometric detection. The periodate oxidation of bilirubin is rapid, effective, selective, and simple to perform. The method contains only HCl, NaOI4, and an anionic surfactant. The method may be useful for economizing in the consumption of reagents in bilirubin determining. The IL-DLLMEmethod ensures a high yield and has a low toxicity no skin sensitization, no mutagenicity and no ecotoxicity in an aquatic environment since only very low quantities of an IL is required. For full-color formation, no any extra auxiliary reagents are required. Besides, the IL-DLLME technique uses a low-cost instrument such as Uv-vis which is present in most of the medical laboratories.

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