The development of high-performance adsorbents is highly demanded in sustainable production of nuclear power. Herein, porous chitosan-poly(imide dioxime) (Cs-PIDO) hydrogel with semi-interpenetrating structure was prepared. Cs-PIDO-1 showed rapid kinetics, high adsorption capacity and excellent regeneration capability. Impressively, the capture speed of Cs-PIDO-1 reached 0.35 mg g⁻¹ d⁻¹ during the first 2-week extraction and its 4-week adsorption capacity was up to 5.75 mg g⁻¹ in real seawater. The superior uranium harvesting performance originated from the cooperation effect of hierarchically porous structure and PIDO groups. This work highlights the importance of rational designed structure and functionality in enhancing the uranium uptake capability.

Graphical abstract

中文翻译：

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壳聚糖-聚酰亚胺二肟半互穿网络水凝胶用于从海水中高效回收铀

核电可持续生产迫切需要开发高性能吸附剂。本文制备了具有半互穿结构的多孔壳聚糖-聚酰亚胺二肟（Cs-PIDO）水凝胶。Cs-PIDO-1表现出快速的动力学、高吸附容量和优异的再生能力。令人印象深刻的是，在前2周的提取过程中，Cs-PIDO-1的捕获速度达到了0.35 mg g ^-1  d ^-1 ，在真实海水中其4周的吸附容量高达5.75 mg g ^{-1 。}优异的铀收集性能源于分级多孔结构和PIDO基团的协同作用。这项工作强调了合理设计结构和功能在提高铀吸收能力方面的重要性。

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