Various eutectic systems including eutectic metals, eutectic salts, and deep eutectic solvents have been proposed and applied in engineering, energy and environmental fields.

Deep eutectic solvents are found to be highly hygroscopic when exposed to the atmosphere.

Sulfur dioxide (SO 2 ), ammonia (NH 3 ), hydrogen sulfide (H 2 S), nitrogen dioxide (NO 2 ), and nitric oxide (NO) are toxic gases from industrial exhaust, which could lead to acid rain, air pollution, health hazards, or corrosion of buildings. Removal of toxic gas is necessary for mitigating damage on human health, improving air quality, conforming to government regulations, and reusing in industry. However, capture of toxic gases with high efficiency, high selectivity, high sustainability, and low cost is still very challenging. Deep eutectic solvents (DESs) are novel green and designable solvents with high biocompatibility, high degradability, and low cost. Capturing toxic gases (e.g., SO 2 , NH 3 , H 2 S, NO 2 , and NO) by DESs is promising and environmentally friendly, which has attracted much attention. Here, we review the capture of SO 2 , NH 3 , H 2 S, NO 2 , and NO by DESs. CO 2 capture by DESs is not included because several reviews on that topic have been published.

One-step solvothermal synthesis of metal sulfides by combining solvothermal synthesis and sulfuration processes. These sulfides show a high catalytic efficiency for nitrogen reduction reactions.

This review provides a holistic overview for the upgrading of levulinic acid into various N-containing functional chemicals.

Two types of novel deep eutectic solvents with different functional groups were designed for highly efficient dissolution of different types of lignin.

Preparation of g-C3N4/metal oxide composites by a general deep eutectic solvent aided method for photocatalytic reduction of nitrogen at atmospheric environment.

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