School of Physics and Space Sciences , China West Normal University , Nanchong 637002 , China.
ACS Appl Mater Interfaces. 2019 Nov 13;11(45):42635-42645. doi: 10.1021/acsami.9b15421. Epub 2019 Nov 1.
The efficient and safe capture of radioactive iodine (I or I) is of great significance in nuclear waste disposal. Here, we report millimeter-scale poly(ether sulfone) composite beads loaded with porous Cu-BTC [Cu(BTC), BTC = 1,3,5-benzenetricarboxylate] (Cu-BTC@PES), prepared by a phase inversion method for the removal of volatile iodine. Three kinds of Cu-BTC@PES composite beads were obtained with different Cu-BTC contents of 48.6, 60.2, and 71.9%, respectively. While maintaining crystallinity, the composite beads exhibited higher I vapor adsorption capacity (639 mg/g) in the form of iodine molecules. The iodine absorption up to 260 mg/g and the adsorption was followed Langmuir isotherm and pseudo-second-order kinetic model. Furthermore, the composite beads can still absorb more than 85% of iodine after 3 cycles of regeneration with excellent recyclability. The resulting Cu-BTC@PES composite beads show great potential for the sustainable removal of radioactive iodine.
高效、安全地捕获放射性碘（I 或 I）在核废料处理中具有重要意义。在这里，我们报告了毫米级聚醚砜（PES）负载多孔 Cu-BTC [Cu（BTC），BTC = 1,3,5-苯三甲酸]（Cu-BTC@PES）复合珠粒的制备，该方法采用相转化法用于去除挥发性碘。制备了 3 种不同的 Cu-BTC@PES 复合珠粒，其 Cu-BTC 含量分别为 48.6%、60.2%和 71.9%。在保持结晶度的同时，复合珠粒以碘分子的形式表现出更高的 I 蒸汽吸附容量（639 mg/g）。碘的吸附量高达 260 mg/g，吸附符合 Langmuir 等温线和拟二级动力学模型。此外，复合珠粒在经过 3 次再生循环后仍能吸收超过 85%的碘，具有优异的可回收性。所得的 Cu-BTC@PES 复合珠粒在可持续去除放射性碘方面具有巨大的潜力。
