Nature CommunicationsBidirectional reactant flux coupling in hollow hierarchical covalent organic framework enabling efficient uranium extraction from seawaterJiacheng ZhangXuewen CaoJun ZhangXuefeng TianJianfei DuRui HuangYihui YuanNing Wang2026-06-19Full textDOI https://doi.org/10.1038/s41467-026-74724-3