Improved utilization of Cu0 for efficient adsorption of iodine in gas and solution by mesoporous Cu0-SBA-15 via solvothermal reduction method

He, Xiaoyun; Chen, Li; Xiao, Xin; Gan, Yi; Yu, Jiaping; Luo, Junyi; Dan, Hui; Wang, Yujie; Ding, Yi; Duan, Tao

doi:10.1016/j.cej.2023.142175

Cited by 14 publications

(4 citation statements)

References 53 publications

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“…The development of metal-modified sorption materials is a viable solution, utilizing their chemical reactions with I 2 to generate corresponding metal iodides and achieve the removal of radioactive iodine. − Various metals, such as Ag, − Cu, , Sn, , and Bi, − and their oxides have been investigated for this purpose. Among them, silver-based materials (SBMs) have undergone the most comprehensive fundamental research and are currently the most widely applied iodine sorption materials in the nuclear industry. , Relevant experimental results demonstrate that SBMs can selectively remove radioactive iodine under the high-temperature conditions typical of real-world operations, making them reliable iodine sorption materials in practical applications.…”

Section: Introductionmentioning

confidence: 99%

Hollow Bismuth-Based Nanoreactor with Ultrathin Disordered Mesoporous Silica Shell for Superior Radioactive Iodine Decontamination

Tian,

Chee,

Hao

et al. 2024

Chem Bio Eng.

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The effective removal of radioactive iodine under harsh high-temperature conditions, akin to those encountered in real spent nuclear fuel reprocessing, remains a formidable challenge. Herein, a novel bismuth-based mesoporous silica nanoreactor with a distinctive hollow yolk–shell structure was successfully synthesized by using silica-coated Bi2O3 as a hard template and alkaline organic ammonia for etching (Bi@HMS-1, HMS = hollow mesoporous silica). In contrast to conventional inorganic alkali-assisted methods with organic template agents, our approach yielded a material with thinner and more disordered shell layers, along with a relatively smaller pore volume. This led to a significant reduction in the physisorption of Bi@HMS-1 onto iodine while maintaining a smooth passage of guest iodine molecules into and out of the shell channels. Consequently, the resulting sorbent exhibited an outstanding iodine sorption capacity at high temperatures, achieving a chemisorption percentage as high as 96.5%, which makes it extremely competitive among the currently reported sorbents.

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Section: Introductionmentioning

confidence: 99%

Hollow Bismuth-Based Nanoreactor with Ultrathin Disordered Mesoporous Silica Shell for Superior Radioactive Iodine Decontamination

Tian,

Chee,

Hao

et al. 2024

Chem Bio Eng.

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“…In the past decades, many porous materials, such as silverexchanged zeolite, mesoporous silica, porous organic cages, covalent organic frameworks, and metal-organic frameworks, have been reported to trap iodine. [7][8][9][10][11] Among these materials, MOFs are viewed as an outstanding candidate for iodine adsorption owing to its high surface area, suitable pore size and good chemical and thermal stability. The zeolitic imidazolate framework (ZIF) is a very important subfamily of metal-organic frameworks.…”

Section: Introductionmentioning

confidence: 99%

Post-synthetic modification of zeolitic imidazolate framework-90 via Schiff base reaction for ultrahigh iodine capture

Zhang,

Chen,

Sun

et al. 2023

J. Mater. Chem. A

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“…26,27 In previous studies, Cu has been incorporated into porous materials in various forms, including Cu(0), Cu(I) and Cu(II), to adsorb I 2 . 20,22,24 It is proposed that different Cu species capture I 2 through redox reactions, ultimately resulting in the formation of CuI in every instance. The formation of CuI precipitate is an irreversible process, which means that these adsorbents cannot be restored to their original state for reuse.…”

mentioning

confidence: 99%

“…For example, silver (Ag), in both metallic Ag(0) and cationic Ag(I) forms, have been employed to capture I 2 via redox reactions, resulting in the formation of silver iodide (AgI) . Given the relatively high cost and toxicity of Ag, alternatives involving nonprecious metals have been investigated for I 2 adsorption. − Among these alternatives, copper (Cu) demonstrates a distinct strong affinity toward I 2 , a critical attribute for effective I 2 capture under the demanding conditions of low concentration and high temperature. , In previous studies, Cu has been incorporated into porous materials in various forms, including Cu(0), Cu(I) and Cu(II), to adsorb I 2 . ,, It is proposed that different Cu species capture I 2 through redox reactions, ultimately resulting in the formation of CuI in every instance. The formation of CuI precipitate is an irreversible process, which means that these adsorbents cannot be restored to their original state for reuse.…”

mentioning

confidence: 99%

Creating Cu(I) Sites in an MOF for Reversible Capture of Molecular Iodine at Low Concentrations and High Temperatures

Pan,

Yang,

Dong

et al. 2024

ACS Materials Lett.

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Developing adsorbents for capturing low-concentration molecular iodine (I 2 ) from nuclear plant off-gases is crucial yet poses significant challenges. Here, we report a specifically designed adsorbent, named MFU-Cu(I), which is prepared by incorporating coordinatively unsaturated monovalent Cu species into an azolate-based MOF. MFU-Cu(I) integrates excellent thermal stability, high porosity, and potent chemical adsorption sites, demonstrating superior I 2 capture performance under stringent conditions. At a low I 2 concentration of 150 ppmv, MFU-Cu(I) achieves high I 2 uptake capacities at both room temperature (3.11 g g −1 ) and 150 °C (0.2 g g −1 ), making it the most effective I 2 adsorbent to date. The ability of MFU-Cu(I) to capture I 2 at low concentrations and elevated temperatures is attributed to the Cu(I) sites firmly anchored within the MOF framework. These sites facilitate dissociative adsorption of I 2 through a redox reaction, while inhibiting the irreversible formation of CuI precipitates. Consequently, MFU-Cu(I) can be readily regenerated after I 2 adsorption via ion exchange followed by vacuum heating. The regenerability of MFU-Cu(I) represents a notable advantage over other chemical adsorbents developed for I 2 capture.

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Improved utilization of Cu0 for efficient adsorption of iodine in gas and solution by mesoporous Cu0-SBA-15 via solvothermal reduction method

Cited by 14 publications

References 53 publications

Hollow Bismuth-Based Nanoreactor with Ultrathin Disordered Mesoporous Silica Shell for Superior Radioactive Iodine Decontamination

Hollow Bismuth-Based Nanoreactor with Ultrathin Disordered Mesoporous Silica Shell for Superior Radioactive Iodine Decontamination

Post-synthetic modification of zeolitic imidazolate framework-90 via Schiff base reaction for ultrahigh iodine capture

Creating Cu(I) Sites in an MOF for Reversible Capture of Molecular Iodine at Low Concentrations and High Temperatures

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