 This new material, NH4, plus COF-SO3-, has been developed as an efficient adsorbent for uranium extraction from seawater. It has demonstrated impressive uptake capacities of up to 851 mg per G, which is significantly higher than other materials currently available. Furthermore, it has shown excellent selectivity towards uranium over a wide range of metals, including sodium, strontium and calcium. This makes it suitable for use in applications where uranium needs to be extracted from complex mixtures. Additionally, the material's stability under harsh conditions, such as pH levels of 1, 8 and 3, means that it can be used in a variety of environments. This article was authored by Xiaohang Xiong, Jiwu Yu, Lulugong and others.