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Low-viscous homologue-paired liquids (HPLs) are designed and employed as special non-ionic deep eutectic solvents for selective separation of SO2 from CO2 and N2. The HPLs are found to have excellent...

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This paper proposes for the first time the preparation of a series of amino acid ionic liquids (AAILs) via one-step hydrolysis of cheap lactams for the capture of CO2. The structures of the prepared AAILs are confirmed using NMR, FTIR, and ESIMS, and their physical properties are also determined. It is found that these AAILs are reversible CO2 absorbents with very high absorption capacities (0.15 to 0.18 g·g1 at 313.2 K and 1.0 bar), better than almost all task-specific ionic liquids reported in literatures. The absorption mechanism is also elucidated to be a combination of 1:1 and 2:1 stoichiometric reaction of AAILs with CO2 from NMR, FTIR, reaction equilibrium thermodynamical modelling (RETM) and quantum calculations. The AAILs have the advantages of simple synthesis, high yield, and using available cheap raw materials. It is believed that this kind of AAILs have great potentials to be used as efficient CO2 absorbents.

Volatile organic compounds (VOCs) may have short‐ and long‐term adverse health effects. Especially, aromatic VOCs including benzene, toluene, ethylbenzene, and xylene (BTEX) are important indoor air pollutants. Developing highly efficient porous adsorbents with broad applicability remains a major challenge. In this study, a perchlorinated covalent‐triazine framework (ClCTF‐1‐400) is prepared for adsorbing BTEX. ClCTF‐1‐400 is confirmed as a partially oxidized/chlorinated microporous covalent triazine framework through a variety of characterization. It is found that ClCTF‐1‐400 is reversible VOCs absorbent with very high absorption capacities, which can adsorb benzene (693 mg g−1), toluene (621 mg g−1), ethylbenzene (603 mg g−1), o‐xylene (500 mg g−1), m‐xylene (538 mg g−1), and p‐xylene (592 mg g−1) at 25 °C and their saturated vapor pressure (≈ 1 kPa). ClCTF‐1‐400 is of higher adsorption capacities for all selected VOCs than activated carbon and other reported adsorbents. The adsorption mechanism is also inferred through theoretical calculation and in‐site Fourier Transform Infrared (FTIR) spectroscopy. The observed excellent BTEX adsorption performance is attributed to the multiple weak interactions between the ClCTF‐1‐400 frameworks and aromatic molecules through multiple weak interactions (CH…π and CCl…π). The breakthrough experiment demonstrates ClCTF‐1‐400 has the potential for real VOCs pollutant removal in air.