A series of cerium-based metal-organic frameworks (MOFs) with structural design and valence state modulation were fabricated for effective phosphate uptake, which were named as Ce-BDC-1, Ce-BDC-2 and Ce-BTC-1. The X-ray diffractometer (XRD) pattern revealed that Ce-BTC-1 was highly coordinatively unsaturated MOF. The Brunauer-Emmett-Teller analysis (BET) confirmed that Ce-BDC-1 possessed the largest specific surface area of 1285.57 m²/g, two-fold higher than the area of Ce-BTC-1 and thousand times larger than that of Ce-BDC-2. The result of X-ray photoelectron spectroscopy (XPS) demonstrated that the dominant valence state of cerium in Ce-BDC-2 was Ce (Ⅲ), while Ce-BDC-1 and Ce-BTC-1 were totally Ce (Ⅳ)-based materials. Impressively, although the physicochemical characteristics were quite divergent, Ce-BTC-1, Ce-BDC-1 and Ce-BDC-2 showed relatively close phosphate removal capacities (the maximum adsorption capacities of them were 242.0, 254.3 and 218.9 mg/g, respectively). Meanwhile, the variety of structure modification or valence state selection would in return affect their adsorption performances, leading to show their own advantage in different removal characteristics like fast adsorption speed, superb uptake capacity in solution with low or high concentration. This study provided three different strategies for preparing high-effective cerium-based adsorbents and revealed the relationship among physicochemical characteristics, adsorption mechanisms and adsorption performances, which might contribute to the design of new metal-based adsorbents.

制备了一系列具有结构设计和价态调节的铈基金属有机骨架（MOF）以有效吸收磷酸盐，它们被命名为 Ce-BDC-1、Ce-BDC-2 和 Ce-BTC-1。X 射线衍射仪 (XRD) 图案显示 Ce-BTC-1 是高度配位不饱和的 MOF。Brunauer-Emmett-Teller 分析 (BET) 证实 Ce-BDC-1 的比表面积最大，为 1285.57 m ²/g，比Ce-BTC-1的面积大两倍，比Ce-BDC-2大一千倍。X射线光电子能谱（XPS）结果表明，Ce-BDC-2中铈的主要价态为Ce（Ⅲ），而Ce-BDC-1和Ce-BTC-1全部为Ce（Ⅳ）-基于材料。令人印象深刻的是，尽管理化特性差异很大，但 Ce-BTC-1、Ce-BDC-1 和 Ce-BDC-2 表现出相对接近的磷酸盐去除能力（它们的最大吸附能力分别为 242.0、254.3 和 218.9 mg/g，分别）。同时，结构修饰或价态选择的多样性反过来会影响它们的吸附性能，导致它们在不同的去除特性上表现出自己的优势，例如吸附速度快，在低浓度或高浓度溶液中具有极好的吸附能力。