Construction of ionic liquid functionalized MXene with extremely high adsorption capacity towards iodine via the combination of mussel-inspired chemistry and Michael addition reaction
Construction of ionic liquid functionalized MXene with extremely high adsorption capacity towards iodine via the combination of mussel-inspired chemistry and Michael addition reaction
复制标题
通过结合贻贝化学和迈克尔加成反应构建对碘具有极高吸附能力的离子液体功能化 MXene
DOI：
10.1016/j.jcis.2021.05.096
复制
发表时间：
2021-05-31
影响因子：
9.9
通讯作者：
Wei, Yen
中科院分区：
文献类型：
--
作者：
Sun, Shiyan;Sha, Xuefeng;Wei, Yen
本研究通过贻贝启发化学和Michael加成反应相结合，制备了一种基于离子液体功能化MXene的高效吸附剂。首先通过多巴胺自聚合在MXene表面包被聚多巴胺（PDA），同时在MXene表面引入氨基。然后，将含烯键离子液体进一步固定在MXene-PDA表面，得到MXene-PDA- il。采用MXene-PDA-IL作为吸附除碘的概念，考察了各种因素对其吸附行为的影响。通过间歇吸附实验、吸附动力学、吸附等温线、吸附热力学和循环吸附实验对实验数据进行了分析。结果表明，吸附剂与碘混合后，吸附过程可在10 min内达到平衡。MXene-PDA-IL对碘的最大吸附量高达695.4 mg g(-1)，高于大多数已报道的吸附剂。考虑到贻贝启发化学在表面功能化和离子液体吸附能力方面的优势，该方法可用于构建许多具有吸附应用潜力的复合材料。(C) 2021爱思唯尔公司版权所有。
In this work, a highly efficient adsorbent based on ionic liquid functionalized MXene has been fabricated through the combination of mussel-inspired chemistry and Michael addition reaction. The surface of MXene was first coated with polydopamine (PDA) through self-polymerization of dopamine and the amino groups were introduced on the surface of MXene simultaneously. After that, the ene bond-containing ionic liquid was further immobilized on the surface of MXene-PDA to obtain MXene-PDA-IL. As a concept, the adsorptive removal of iodine using MXene-PDA-IL was conducted and the effects of various factors on the adsorption behavior were examined. The experimental data were analyzed by intermittent adsorption experiments, the adsorption kinetics, adsorption isotherm, adsorption thermodynamics, and cyclic adsorption experiments. We found that the adsorption procedure could reach equilibrium within 10 min after mixing adsorbent and iodine. The maximum adsorption capacity of MXene-PDA-IL towards iodine was as high as 695.4 mg g(-1), which is greater than most of reported adsorbents. Considered the advantages of mussel-inspired chemistry for surface functionalization and the adsorption capacity of ionic liquids, the method could be used for construct a number of composites with potential for adsorption applications. (C) 2021 Elsevier Inc. All rights reserved.