方解石
沸石咪唑盐骨架
化学
核裂变产物
咪唑酯
对分布函数
乏核燃料
颗粒
分子
裂变产物
吸附
无机化学
金属有机骨架
放射化学
物理化学
核化学
沸石
有机化学
催化作用
数学分析
地质学
海洋学
数学
作者
Dorina F. Sava,Mark A. Rodriguez,Karena W. Chapman,Peter J. Chupas,Jeffery A. Greathouse,Paul Crozier,Tina M. Nenoff
摘要
Here we present detailed structural evidence of captured molecular iodine (I(2)), a volatile gaseous fission product, within the metal-organic framework ZIF-8 [zeolitic imidazolate framework-8 or Zn(2-methylimidazolate)(2)]. There is worldwide interest in the effective capture and storage of radioiodine, as it is both produced from nuclear fuel reprocessing and also commonly released in nuclear reactor accidents. Insights from multiple complementary experimental and computational probes were combined to locate I(2) molecules crystallographically inside the sodalite cages of ZIF-8 and to understand the capture of I(2) via bonding with the framework. These structural tools included high-resolution synchrotron powder X-ray diffraction, pair distribution function analysis, and molecular modeling simulations. Additional tests indicated that extruded ZIF-8 pellets perform on par with ZIF-8 powder and are industrially suitable for I(2) capture.
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