Robust self-floating covalent organic framework/chitosan aerogels for the efficient removal of sulfamerazine

气凝胶 吸附 材料科学 共价有机骨架 化学工程 水溶液 磺胺美拉嗪 解吸 多孔性 共价键 壳聚糖 纳米纤维 纳米技术 复合材料 化学 有机化学 工程类 磺胺嘧啶 生物化学 抗生素
作者
Ke Liu,Juan Yang,Jiale Liu,Shuai Qin,Yusuke Yamauchi,Minsu Han,Lijin Huang
出处
期刊:Chemical Engineering Journal [Elsevier BV]
卷期号:472: 144966-144966 被引量:71
标识
DOI:10.1016/j.cej.2023.144966
摘要

Covalent organic framework (COF) aerogels have attracted significant interest due to their broad range of potential applications. However, synthesizing COF aerogels with tailored structures and robust mechanical stability remains a formidable challenge. In this work, we present a double-cross-linking strategy to prepare a series of compressible COF/chitosan (COF/CS) aerogels under mild conditions. By harnessing chemical cross-linking and physical interactions, such as electrostatic and hydrogen bonding, ionic COF powders containing sulfonic acid groups (i.e., TpPa-SO3H) are immobilized and connected with CS, forming a three-dimensional interconnected network. Impressively, the ratio of COF to CS and the size of the COF/CS aerogels can be easily controlled by adjusting the processing parameters. The resulting COF/CS aerogels possess a highly porous structure and low density, enabling the aerogels to self-float and facilitating practical applications and recycling. Due to these remarkable characteristics, TpPa-SO3H/CS aerogel demonstrates excellent adsorption capacity, effectively removing sulfamerazine from aqueous solutions with an adsorption capacity of 102.5 mg·g−1. Moreover, the aerogel can be reused in three adsorption–desorption cycles without significant capacity loss. This proposed method offers a facile, eco-friendly, and scalable approach for producing highly compressive COF-based aerogels, thereby accelerating the practical utilization of COFs and contributing to environmental remediation.
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