Department of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Road, Xindu, 610500, Chengdu, China.
Soft Matter. 2017 Nov 29;13(46):8772-8780. doi: 10.1039/c7sm01977g.
Herein, a novel type of two-component supramolecular adsorbent, 2-OA, was developed based on non-covalent interactions using tetrazolyl derivative with octadecylamine (OA) and fully characterized using a number of structural and spectral techniques. The self-assembled 2-OA gels displayed remarkable stimuli-responsiveness as well as shape-persistent and self-healing properties. In addition, it was found that the adsorbent 2-OA was able to remove dyes (10 kinds of cationic and anionic dyes) and metal ions (Cu and Fe) simultaneously from wastewater owing to synergistic electrostatic attraction, hydrogen-bonding, and hydrophobic and coordination interactions. It also exhibited excellent co-adsorption capability to dye mixtures and binary mixtures of dyes and metal ions. In particular, the dye/metal-loaded adsorbents could be obtained easily from the aqueous phase, and recycling of the adsorbents could thus be achieved. These results suggest that the supramolecular gel 2-OA not only has great potential application in wastewater treatment but also provides a strategy for the development of intriguing self-healing materials.
本文基于非共价相互作用，利用含叠氮基的十八胺衍生物（2-OA）合成了一种新型的两亲超分子吸附剂，并通过多种结构和光谱技术对其进行了全面的表征。自组装的 2-OA 凝胶表现出显著的刺激响应性以及形状保持和自修复性能。此外，研究发现吸附剂 2-OA 能够通过协同静电吸引、氢键、疏水和配位相互作用，从废水中同时去除染料（10 种阳离子和阴离子染料）和金属离子（Cu 和 Fe）。它还表现出对染料混合物和染料与金属离子二元混合物的优异共吸附能力。特别是，负载有染料/金属的吸附剂可以很容易地从水相中获得，从而实现了吸附剂的循环利用。这些结果表明，超分子凝胶 2-OA 不仅在废水处理方面具有巨大的应用潜力，而且为开发有趣的自修复材料提供了一种策略。
