Hydrophobic deep eutectic solvents as green absorbents for hydrophilic VOC elimination

Chen, Chun-Chi; Huang, Yen-Hui; Fang, Jiayu

doi:10.1016/j.jhazmat.2021.127366

Cited by 38 publications

(10 citation statements)

References 75 publications

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“…The two most commonly used compounds to prepare type V DES are thymol, which acts as a strong HBD, and menthol, which can act as an HBD or an HBA [22,[30][31][32]. It is important to note, though, that the use of these compounds does not guarantee non-ideal behavior, which reinforces the need to assess the solid-liquid phase diagram of novel mixtures [33,34].…”

Section: Introductionmentioning

confidence: 99%

Liquefying Flavonoids with Terpenoids through Deep Eutectic Solvent Formation

et al. 2022

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The formation of deep eutectic solvents (DES) is tied to negative deviations to ideality caused by the establishment of stronger interactions in the mixture than in the pure DES precursors. This work tested thymol and menthol as hydrogen bond donors when combined with different flavonoids. Negative deviations from ideality were observed upon mixing thymol with either flavone or flavanone, two parent flavonoids that only have hydrogen bond acceptor (HBA) groups, thus forming non-ionic DES (Type V). On the other hand, the menthol systems with the same compounds generally showed positive deviations from ideality. That was also the case with the mixtures containing the more complex hydroxylated flavonoid, hesperetin, which resulted in positive deviations when mixed with either thymol or menthol. COSMO-RS successfully predicted the behavior of the solid-liquid phase diagram of the studied systems, allowing for evaluation of the impact of the different contributions to the intermolecular interactions, and proving to be a good tool for the design of DES.

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Section: Introductionmentioning

confidence: 99%

Liquefying Flavonoids with Terpenoids through Deep Eutectic Solvent Formation

et al. 2022

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“…where U o is the flow rate of the carrier gas at the column temperature and outlet pressure (cm 3 •mol −1 ), t R is the retention time of the solutes (in minutes), and t G is the retention time of the unretained gas (in minutes). Equation 3 was used to adjust for the vapor pressure that the water in the soap solution in the flow meter exerted.…”

Section: Theoretical Framementioning

confidence: 99%

“…2 These properties are due to the fact that ionic liquids have a melting point lower than the ambient temperature (100 °C) and are bulk ions that are asymmetrical (e.g., ammonium, imidazolium, etc.). 3 Such a melting temperature allows good separation for mixtures of high-temperature boiling components. 4 Nonetheless, some of the ionic liquids are found to have a few drawbacks, which include high viscosity, toxicity, no or low biodegradability, as well as high costs and low production yield.…”

Section: Introductionmentioning

confidence: 99%

Separation Performance of Ethaline: Infinite Dilution Activity Coefficients and the Excess Thermodynamic Properties

Manyoni

Redhi

2023

J. Chem. Eng. Data

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This paper presents excess thermodynamic data of a mixture of choline chloride, a hydrogen bond acceptor (HBA), and ethylene glycol, a hydrogen bond donor (HBD), with a molar ratio of 1:2, correspondingly. This mixture is popularly known as ethaline. A gas−liquid chromatograph (GLC) fitted with a thermal conductivity detector (TCD) was used to determine infinite dilution activity coefficient (IDAC) values of different functional groups (e.g., alkanes, alkenes, alkynes, cycloalkanes, aromatics, alcohols, ketones, and water) for 32 different organic solutes at different temperatures (T = 313.15−343.15 K) and air pressures. The partial excess molar properties, including Gibbs free energy, enthalpy, and entropy, were computed from the infinite dilution activity coefficient measurements at T = 323.15 K. Furthermore, the separation performance of common separation problems, i.e., hexane/ benzene, cyclohexane/hexane, ethanol/toluene, and acetone/methanol, was evaluated through the selectivity and capacity values, and this was also computed from the infinite dilution activity coefficient values. It was found that ethaline could not be suitable for prospective separation issues, as a result of the poor thermodynamic data that were measured.

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“…As essential industrial solvents and chemical raw materials, volatile organic compounds (VOC) containing acetone, toluene, and formaldehyde are widely used in the pharmaceutical industry and pesticide preparation. However, due to their high volatility, toxicity, and flammability, the use and storage of VOCs are serious safety concerns. − Therefore, the development of powerful VOC sensors is of urgent importance for environmental protection and human health.…”

Section: Introductionmentioning

confidence: 99%

Controlling the Crystal Phase Structure of WO₃ Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance

Yang

Cao

et al. 2022

ACS Appl. Nano Mater.

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The pursuit of high performance is the eternal theme in gas sensor research. Because of the complexity of the response and recovery processes, the selective detection, high response, rapid response, and recovery remain challenging in the atmospheric environment. In this paper, WO3 hierarchical spheres (WO3 HS) with different crystalline phase ratios are successfully synthesized to evaluate the relationship between the phase structure and gas-sensitive properties. The as-prepared WO3-2 HS samples achieve superior gas sensing characteristics including high response (S = 24.2) and fast response and recovery speed (1 and 19 s) to 100 ppm acetone at 300 °C. The superior acetone sensing performance probably originates from the regulation of the phase ratios of nanosheet-based WO3. With the decrease of orthorhombic phase and the increase of monoclinic phase, the specificity detection to acetone is increased significantly. The reasons for such a huge selectivity change are discussed in detail. From the perspective of reaction kinetics, we also compare the contributions of specific surface area and crystalline phase impacting the gas sensing performance.

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Hydrophobic deep eutectic solvents as green absorbents for hydrophilic VOC elimination

Cited by 38 publications

References 75 publications

Liquefying Flavonoids with Terpenoids through Deep Eutectic Solvent Formation

Liquefying Flavonoids with Terpenoids through Deep Eutectic Solvent Formation

Separation Performance of Ethaline: Infinite Dilution Activity Coefficients and the Excess Thermodynamic Properties

Controlling the Crystal Phase Structure of WO₃ Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance

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Hydrophobic deep eutectic solvents as green absorbents for hydrophilic VOC elimination

Cited by 38 publications

References 75 publications

Liquefying Flavonoids with Terpenoids through Deep Eutectic Solvent Formation

Liquefying Flavonoids with Terpenoids through Deep Eutectic Solvent Formation

Separation Performance of Ethaline: Infinite Dilution Activity Coefficients and the Excess Thermodynamic Properties

Controlling the Crystal Phase Structure of WO3 Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance

Contact Info

Product

Resources

About

Controlling the Crystal Phase Structure of WO₃ Nanosheet-Based Hierarchical Spheres for Enhanced Gas Sensing Performance