化学
沸石
碘
吸附
铜
人体净化
纳米颗粒
硝酸
放射性碘
分子筛
金属
无机化学
化学工程
核化学
有机化学
催化作用
废物管理
甲状腺
工程类
内科学
医学
作者
Qian Zhao,Changzhong Liao,Guangyuan Chen,Ruixi Liu,Sheng Wang,Anhu Xu,Shiyin Ji,Kaimin Shih,Lin Zhu,Tao Duan
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2022-11-25
卷期号:61 (49): 20133-20143
被引量:18
标识
DOI:10.1021/acs.inorgchem.2c03582
摘要
Effective capture of radioactive iodine is highly desirable for decontamination purposes in spent fuel reprocessing. Cu-based adsorbents with a low cost and high chemical affinity for I2 molecules act as a decent candidate for iodine elimination, but the low utilization and stability remain a significant challenge. Herein, a facile in situ confined synthesis strategy is developed to design and synthesize a copper-encapsulated flaky silicalite-1 (Cu@FSL-1) zeolite with a thickness of ≤300 nm. The maximum iodine uptake capacity of Cu@FSL-1 can reach 625 mg g–1 within 45 min, which is 2 times higher than that of a commercial silver-exchanged zeolite even after nitric acid and NOX treatment. The Cu nanoparticles (NPs) confined within the zeolite exert superior iodine adsorption and immobilization properties as well as high stability and fast adsorption kinetics endowed by the all-silica zeolite matrix. This study provides new insight into the design and controlled synthesis of zeolite-confined metal adsorbents for efficient iodine capture from gaseous radioactive streams.
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