In Situ Confined Synthesis of a Copper-Encapsulated Silicalite-1 Zeolite for Highly Efficient Iodine Capture

被引：31

作者：

Zhao, Qian ^{[1
,2
]}

Liao, Changzhong ^{[3
]}

Chen, Guangyuan ^{[1
,2
]}

Liu, Ruixi ^{[1
,2
]}

Wang, Zeru ^{[1
,2
]}

Xu, Anhu ^{[1
,2
]}

Ji, Shiyin ^{[1
,2
]}

Shih, Kaimin ^{[4
]}

Zhu, Lin ^{[1
,2
]}

Duan, Tao ^{[1
,2
]}

机构：

[1] Southwest Univ Sci & Technol, Natl Coinnovat Ctr Nucl Waste Disposal & Environm, Mianyang 621010, Peoples R China

[2] Southwest Univ Sci & Technol, Sch Natl Def Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Peoples R China

[3] Guangxi Univ, Key Lab New Proc Nonferrous Met & Mat, Minist Educ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China

[4] Univ Hong Kong, Dept Civil Engn, Hong Kong 852, Peoples R China

来源：

INORGANIC CHEMISTRY | 2022年

基金：

中国国家自然科学基金;

关键词：

CARBON; SORBENTS; REMOVAL; METALS; ROBUST;

D O I：

10.1021/acs.inorgchem.2c03582

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

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.

引用

页码：20133 / 20143

页数：11

共 73 条

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