Absorptive separation of HCl gas by choline chloride-based deep eutectic solvents

Zhu, Jie; Shao, Hui; Feng, Lin; Lu, Yingzhou; Meng, Hong; Li, Chunxi

doi:10.1016/j.molliq.2021.116928

Cited by 33 publications

(14 citation statements)

References 29 publications

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“…) in the DES. 34,35 The FTIR spectra of DHAQ, DHAQ-Si, and DHAQ-PMOs are shown in Figure S1a 36 These results indicate that DHAQ-Si has been successfully introduced into the pore walls of DHAQ-PMOs. 2.2.…”

Section: Resultsmentioning

confidence: 89%

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A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺

Han

2022

ACS Omega

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A novel type of organic–inorganic hybrid periodic mesoporous materials based on 1,8-dihydroxyanthraquinone (DHAQ-PMOs) was synthesized in a ternary deep eutectic solvent (DES). In the process of the material synthesis, an organosiloxane precursor (DHAQ-Si) and tetraethylorthosilicate (TEOS) were used as the mixed Si source, and cetyltrimethylammonium bromide (CTAB) was used as the structure directing agent. The DES formed by choline chloride (ChCl), urea (U), and ethylene glycol (EG) was used as a green solvent. The water needed for the hydrolysis of DHAQ-Si and TEOS was provided from free water in the sodium hydroxide solution. As characterized by small-angle X-ray scattering, nitrogen adsorption/desorption isotherms, and high-resolution transmission electron microscopy, the obtained mesoporous materials exhibit a two-dimensional hexagonal ( P 6 mm ) structure. DHAQ possesses double fluorescence emission peaks at ca. 520 and 580 nm due to the effect of the excited-state intramolecular proton transfer (ESIPT). For DHAQ-PMOs, the silica framework can provide a rigid environment that makes the fluorescence properties more stable and the fluorescence emission peak appears to red-shift obviously. The DHAQ-PMOs have high selectivity and sensitivity in a wide pH range that can be used to detect Cu 2+ , and the limit of detection (LOD) is as low as 2.39 × 10 –9 M. Fluorescence polarization experiments, high-resolution mass spectrometry, and Fourier transform infrared spectroscopy were used to study the coordination interaction between DHAQ and Cu 2+ . The density functional theory (DFT) was used to further prove the coordination ability and interaction between DHAQ and Cu 2+ . XPS spectra were also done to prove the coordination of DHAQ and DHAQ-PMO-10 with Cu 2+ . In addition, confocal fluorescence microscope images exhibit that DHAQ-PMOs can detect Cu 2+ in living cells. The results show that DHAQ-PMOs have great application potential as a sensor for the detection of Cu 2+ .

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Section: Resultsmentioning

confidence: 89%

“…At the same time, the intensity of the −OH in EG is enhanced, which indicated that they are all involved in the formation of the large number of hydrogen bonds (N–H···Cl, O–H···O, O–H···Cl, etc.) in the DES. , …”

Section: Resultsmentioning

confidence: 99%

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺

Han

2022

ACS Omega

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“…With dual attributes of HBA and HBD, HCl can form H-bonds with each component of the DESs, resulting in the rearrangement of the H-bond network and structure evolution of the solution in the absorption process. The reversible absorption and desorption of HCl are dominated by the H-bonds’ exchange among components . The H-bonding in the neat DESs is a strong short-range interaction, stronger than the intermolecular van der Waals and dipole interactions, which greatly affects the properties of the solution.…”

Section: Resultsmentioning

confidence: 99%

Solubility Behavior and the Mechanism of HCl Gas in Four [EMIM]Cl-Based Deep Eutectic Solvents

et al. 2022

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The solubility behavior of HCl gas in four 1-ethyl-3-methylimidazolium chloride([Emim]Cl)-based deep eutectic solvents (DESs), i.e., an [Emim]Cl mixture with 4-methylimidazole (DES1), 2-methylimidazole (DES2), malonic acid (DES3), and poly(ethylene glycol) 400 (DES4), was studied at 301.15−348.15 K and a 0−101.325 kPa partial pressure of HCl. The H-bonding interaction and the dissolution mechanism were studied via Fourier-transform infrared spectroscopy (FTIR), 1 H NMR, and 13 C NMR. The HCl solubility increases with the alkalinity of the DESs and its H-bonding interaction with the solvent and follows the order DES1 > DES2 > DES4 > DES3. The HCl solubility in DES1 is 0.584 g-HCl/g-DES with partially irreversible desorption due to its chemical interaction with HCl. In contrast, HCl is physically dissolved in DES3 and DES4 with facile and reversible desorption. The solution viscosity decreases sharply and the density increases slightly as the absorption proceeds. Considering its higher solubility, thermal stability, and facile desorption, DES4 is more viable for HCl absorption. The result is instructive for the development of a greener recovery process for HCl gas and the selection of efficient DESs.

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“…All DESs are prepared by mixing BmimCl and a HBD (EG, GA, MA, thiourea, AA or TAA) at 343.15 K. The synthesis is conducted as per the method described elsewhere. 26,27 For example, BmimCl-TAA (1 : 1) was synthesized by mixing stoichiometric amounts of BmimCl and TAA, and stirring 1.5 h magnetically at 333.15 K. The resulting DES was vacuum dried at 333.15 K for 24 h, and then kept in a desiccator for later use. The molar mass of DES ( M DES ) is calculated as the mole fraction average of the constituents, as shown in eqn (1), where M HBA and M HBD are the molar mass of HBA and HBD in g mol −1 .…”

Section: Methodsmentioning

confidence: 99%

“…Meanwhile, the regeneration of DES is greatly facilitated because of the declined HB interaction between DES and HCl. 26,27 Hu et al recently reported the efficient and reversible uptake of HCl by the DES/EG blend, since the densified HB networks in DESs or the DES/EG blend lowered the energy level of systems and induced superior absorption of HCl. At the same time, the EG content can adjust the phase change of the solvent in the absorption process of HCl.…”

Section: Introductionmentioning

confidence: 99%

Rational design of efficient deep eutectic solvents for HCl absorption through their competitive H-bonding interactions

Feng

et al. 2022

Phys. Chem. Chem. Phys.

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Absorptive separation of HCl gas by choline chloride-based deep eutectic solvents

Cited by 33 publications

References 29 publications

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺

Solubility Behavior and the Mechanism of HCl Gas in Four [EMIM]Cl-Based Deep Eutectic Solvents

Rational design of efficient deep eutectic solvents for HCl absorption through their competitive H-bonding interactions

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Absorptive separation of HCl gas by choline chloride-based deep eutectic solvents

Cited by 33 publications

References 29 publications

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu2+

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu2+

Solubility Behavior and the Mechanism of HCl Gas in Four [EMIM]Cl-Based Deep Eutectic Solvents

Rational design of efficient deep eutectic solvents for HCl absorption through their competitive H-bonding interactions

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A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺