Dihydric alcohol-based eutectic solvent as well as preparation method and application thereof

The invention discloses a dihydric alcohol-based eutectic solvent and a preparation method and application thereof, the eutectic solvent is composed of a hydrogen bond donor and a hydrogen bond acceptor, the hydrogen bond donor is dihydric alcohol, the hydrogen bond acceptor is one of malonic acid, acetamide, choline chloride and tetraethylammonium chloride, and the molar ratio of the hydrogen bond donor to the hydrogen bond acceptor is 2: 1-4: 1. The deep-eutectic solvent disclosed by the invention can be efficiently used for adsorbing iodine molecules, is green and environment-friendly, and does not cause environmental pollution. 本发明公开了一种二元醇基低共熔溶剂及其制备方法与应用，所述低共熔溶剂由氢键供体和氢键受体组成，氢键供体选用二元醇，氢键受体选用丙二酸、乙酰胺、氯化胆碱和四乙基氯化铵中的一种，氢键供体和氢键受体的摩尔比为2:1-4:1。本发明所述的低共熔溶剂可高效应用于碘分子的吸附，且绿色环保，不会造成环境污染。