Ellagic acid: A highly selective thorium-binding natural polyphenol from rare earth elements
Ellagic acid: A highly selective thorium-binding natural polyphenol from rare earth elements
研究概述
发现天然多酚鞣花酸能从稀土元素体系中高选择性吸附Th(IV)，pH 4时分配系数达1.9×10⁶ mL/g，可将钍浓度由ppm降至ppb级。机理归因于钍与酚羟基的强配位；进一步构筑钍–鞣花酸MOF，兼具化学及辐照稳定性，碘蒸气吸附量2.52 g/g。
谱图与表征信息
Fig. 6. (a) Normalized Th L3-edge XANES spectra of Thorium nitrate hydrate and Thorium-ellagate MOF. (b) k2-weighted FT-EXAFS fitting at the Th L3-edge of Thorium-ellagate MOF in R-space. WT-EXAFS images of (c) Thorium nitrate hydrate, (d) Thorium-ellagate MOF at Th L3-edge.