AbstractAn amino-functionalized zirconium metal-organic framework was composed with a 3D urea-based porous organic polymer to give a hybrid material termed UiO-66-NH2/urea-POP. The material was characterized by Fourier transform infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, and Brunauer-Emmett-Teller surface area measurements. It is shown to be a viable sorbent for solid-phase extraction of uranium from water samples. Parameters such as the pH value of the sample, amount of adsorbent, type and volume of eluent, adsorption and desorption time, and sample volume were optimized. Uranyl ion was quantified by using UV-vis spectrophotometry by using 1-(2-pyridyl-azo)-2-naphthol as the indicator. Figures of merits include (a) a maximum sorption capacity of 278 mg g−1; (b) a detection limit of 0.6 μg L−1; and (c) intra-day and inter-day precisions (for n = 5 at a concentration of 100 μg L−1) of 4.8 and 1.9%, respectively. The sorbent can be recycled, and no significant change was observed in the capacity and repeatability of the sorbent after seven extractions. The high surface area, metal-binding sites, and stability of the sorbent makes it a most viable tool for efficient and fast extraction and removal of uranium. Graphical abstractSchematic of a new porous hybrid solid, referred to as UiO-66-NH2/urea-POP. It combines a zirconium-based metal-organic framework and a urea-based porous organic polymer. It is shown to be a highly efficient sorbent for solid-phase extraction of uranium(VI) prior to its spectrophotometric determination.

中文翻译：

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由氨基官能化锆基金属有机骨架和尿素基多孔有机聚合物组成的杂化材料作为提取铀（VI）的高效吸附剂

摘要 氨基功能化的锆金属有机骨架与 3D 尿素基多孔有机聚合物组成，得到一种称为 UiO-66-NH2/urea-POP 的杂化材料。该材料通过傅里叶变换红外光谱、粉末 X 射线衍射、扫描电子显微镜和 Brunauer-Emmett-Teller 表面积测量进行表征。它被证明是一种可行的吸附剂，可用于从水样中固相萃取铀。对样品的pH值、吸附剂的用量、洗脱液的种类和体积、吸附和解吸时间、样品体积等参数进行了优化。铀离子通过使用 1-(2-吡啶基-偶氮)-2-萘酚作为指示剂的紫外-可见分光光度法定量。品质因数包括 (a) 最大吸附容量为 278 mg g-1；(b) 0.6 μg L-1 的检测限；(c) 日内和日间精度（n = 5，浓度为 100 μg L-1）分别为 4.8% 和 1.9%。吸附剂可以循环使用，经过七次萃取后，吸附剂的容量和重复性没有明显变化。吸附剂的高表面积、金属结合位点和稳定性使其成为高效快速提取和去除铀的最可行工具。图解摘要一种新型多孔混合固体的示意图，称为 UiO-66-NH2/urea-POP。它结合了锆基金属有机骨架和尿素基多孔有机聚合物。它被证明是一种高效的吸附剂，用于在分光光度法测定之前对铀 (VI) 进行固相萃取。吸附剂可以循环使用，经过七次萃取后，吸附剂的容量和重复性没有明显变化。吸附剂的高表面积、金属结合位点和稳定性使其成为高效快速提取和去除铀的最可行工具。图解摘要一种新型多孔混合固体的示意图，称为 UiO-66-NH2/urea-POP。它结合了锆基金属有机骨架和尿素基多孔有机聚合物。它被证明是一种高效的吸附剂，用于在分光光度法测定之前对铀 (VI) 进行固相萃取。吸附剂可以循环使用，经过七次萃取后，吸附剂的容量和重复性没有明显变化。吸附剂的高表面积、金属结合位点和稳定性使其成为高效快速提取和去除铀的最可行工具。图解摘要一种新型多孔混合固体的示意图，称为 UiO-66-NH2/urea-POP。它结合了锆基金属有机骨架和尿素基多孔有机聚合物。它被证明是一种高效的吸附剂，用于在分光光度法测定之前对铀 (VI) 进行固相萃取。吸附剂的稳定性和稳定性使其成为高效快速提取和去除铀的最可行工具。图解摘要一种新型多孔混合固体的示意图，称为 UiO-66-NH2/urea-POP。它结合了锆基金属有机骨架和尿素基多孔有机聚合物。它被证明是一种高效的吸附剂，用于在分光光度法测定之前对铀 (VI) 进行固相萃取。吸附剂的稳定性和稳定性使其成为高效快速提取和去除铀的最可行工具。图解摘要一种新型多孔混合固体的示意图，称为 UiO-66-NH2/urea-POP。它结合了锆基金属有机骨架和尿素基多孔有机聚合物。它被证明是一种高效的吸附剂，用于在分光光度法测定之前对铀 (VI) 进行固相萃取。