Radioactive Iodine Capture in Silver-Containing Mordenites through Nanoscale Silver Iodide Formation,Journal of the American Chemical Society

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Radioactive Iodine Capture in Silver-Containing Mordenites through Nanoscale Silver Iodide Formation
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2010-07-07 , DOI: 10.1021/ja103110y
Karena W. Chapman ₁ , Peter J. Chupas ₁ , Tina M. Nenoff ₁

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The effective capture and storage of radiological iodine ((129)I) remains a strong concern for safe nuclear waste storage and safe nuclear energy. Silver-containing mordenite (MOR) is a longstanding benchmark for iodine capture; however, the molecular level understanding of this process needed to develop more effective iodine getters has remained elusive. Here we probe the structure and distribution of iodine sorbed by silver-containing MOR using differential pair distribution function analysis. While iodine is distributed between gamma-AgI nanoparticles on the zeolite surface and subnanometer alpha-AgI clusters within the pores for reduced silver MOR, in the case of unreduced silver-exchanged MOR, iodine is exclusively confined to the pores as subnanometer alpha-AgI. Consequently, unreduced silver-containing zeolites may offer a more secure route for radioactive iodine capture, with the potential to more effectively trap the iodine for long-term storage.

中文翻译：

通过纳米级碘化银形成在含银丝光沸石中捕获放射性碘

放射性碘（（129）I）的有效捕获和储存仍然是安全核废料储存和安全核能的一个强烈关注。含银丝光沸石 (MOR) 是碘捕获的长期基准；然而，开发更有效的碘吸收剂所需的这一过程的分子水平理解仍然难以捉摸。在这里，我们使用差分对分布函数分析探测了含银 MOR 吸附的碘的结构和分布。虽然碘分布在沸石表面的 γ-AgI 纳米粒子和孔隙内的亚纳米 α-AgI 簇之间，用于还原银 MOR，但在未还原的银交换 MOR 的情况下，碘仅作为亚纳米 α-AgI 被限制在孔隙中。最后，

更新日期：2010-07-07

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