Iodine capture by ZSM-5 with different Si/Al ratios: An experimental and molecular simulation investigation

Li, Qian-Fan; Yu, Rui-Li; Li, Zhen-Le; Xia, Liangzhi

doi:10.1016/j.micromeso.2023.112536

Cited by 7 publications

(3 citation statements)

References 38 publications

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“…In order to explore the general removal effect of the sorbent on organic iodine species, we supplemented the sample (Bi@Al/SiO 2(4 mL) ‐2) capture experiment on CH 3 CH 2 I, and the result showed that the sorption capacity of 266 mg g −1 could also be obtained. Finally, as shown in Table S1 (Supporting Information), compared with the currently reported bismuth‐based materials and some other sorbents, [ 24,28,33,34,47–50 ] the sorption capacity of Bi@Al/SiO 2(4 mL) ‐2 for I 2 is competitive. Furthermore, to our knowledge, BBM with the ability to capture CH 3 I and CH 3 CH 2 I is the first to be reported.…”

Section: Resultsmentioning

confidence: 99%

“…be obtained. Finally, as shown in Table S1 (Supporting Information), compared with the currently reported bismuth-based materials and some other sorbents, [24,28,33,34,[47][48][49][50] the sorption capacity of Bi@Al/SiO 2(4 mL) -2 for I 2 is competitive. Furthermore, to our knowledge, BBM with the ability to capture CH 3 I and CH 3 CH 2 I is the first to be reported.…”

Section: /Ch 3 I Capture Propertiesmentioning

confidence: 94%

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Hollow Core–Shell Bismuth Based Al‐Doped Silica Materials for Powerful Co‐Sequestration of Radioactive I₂ and CH₃I

Tian,

Hao,

Chee

et al. 2023

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Developing pure inorganic materials capable of efficiently co‐removing radioactive I2 and CH3I has always been a major challenge. Bismuth‐based materials (BBMs) have garnered considerable attention due to their impressive I2 sorption capacity at high‐temperature and cost‐effectiveness. However, solely relying on bismuth components falls short in effectively removing CH3I and has not been systematically studied. Herein, a series of hollow mesoporous core–shell bifunctional materials with adjustable shell thickness and Si/Al ratio by using silica‐coated Bi2O3 as a hard template and through simple alkaline‐etching and CTAB‐assisted surface coassembly methods (Bi@Al/SiO2) is successfully synthesized. By meticulously controlling the thickness of the shell layer and precisely tuning of the Si/Al ratio composition, the synthesis of BBMs capable of co‐removing radioactive I2 and CH3I for the first time, demonstrating remarkable sorption capacities of 533.1 and 421.5 mg g−1, respectively is achieved. Both experimental and theoretical calculations indicate that the incorporation of acid sites within the shell layer is a key factor in achieving effective CH3I sorption. This innovative structural design of sorbent enables exceptional co‐removal capabilities for both I2 and CH3I. Furthermore, the core–shell structure enhances the retention of captured iodine within the sorbents, which may further prevent potential leakage.

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Section: Resultsmentioning

confidence: 99%

Section: /Ch 3 I Capture Propertiesmentioning

confidence: 94%

Hollow Core–Shell Bismuth Based Al‐Doped Silica Materials for Powerful Co‐Sequestration of Radioactive I₂ and CH₃I

Tian,

Hao,

Chee

et al. 2023

Small

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“…The solid adsorption method stands out for its simplicity, high efficiency, and low contamination . Previous studies have discussed various solid adsorbents in the literature, including activated carbon, , zeolite, − silver exchange zeolite, , and organic or inorganic mixed materials. , Activated carbon is cost-effective and stable in acidic or alkaline environments. However, due to its unique chemical and physical properties, activated carbon has a low ignition temperature, which is not suitable in oxygen-rich and high-temperature environments .…”

Section: Introductionmentioning

confidence: 99%

Analysis of Radioactive Iodine Trapping Mechanism by Zinc-Based Metal–Organic Frameworks with Various N-Containing Carboxylate Ligands

et al. 2023

ACS Appl. Mater. Interfaces

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This study aimed to develop effective adsorbents for capturing radioactive iodine in nuclear power waste gas. Two zinc metal−organic frameworks (Zn-MOFs) were synthesized and found to have favorable properties such as a large surface area, thermal stability, surface rich in π-electron-containing nitrogen, and redox potential. Adsorption experiments revealed maximum capacities of 1.25 and 1.96 g g −1 for the MOFs at 75 °C, with the pseudo-second-order kinetic model fitting the data well. The Langmuir equation provided a better fit in cyclohexane, with maximum adsorption amounts of 249 and 358 mg g −1 for Zn-MOF-1 and Zn-MOF-2, respectively. The MOFs were also stable during six cycles of adsorption and desorption. Furthermore, electron transfer occurred due to the synergistic adsorption of Zn, N, and O atoms, resulting in the conversion of some iodine to polyiodide. Zn-MOF-2 exhibited better chemisorption than Zn-MOF-1 due to a smaller highest occupied molecular orbital (HOMO)−lowest unoccupied molecular orbital (LUMO) gap. Notably, it was discovered that N-containing radicals had stronger interactions with iodine compared to radicals without N. These findings provide valuable insights into MOF synthesis and environmental protection.

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C@MOF composite material for rapid and efficient capture of gaseous iodine

Yu,

Sun,

Wang

et al. 2024

Chemical Engineering Journal

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Iodine capture by ZSM-5 with different Si/Al ratios: An experimental and molecular simulation investigation

Cited by 7 publications

References 38 publications

Hollow Core–Shell Bismuth Based Al‐Doped Silica Materials for Powerful Co‐Sequestration of Radioactive I₂ and CH₃I

Hollow Core–Shell Bismuth Based Al‐Doped Silica Materials for Powerful Co‐Sequestration of Radioactive I₂ and CH₃I

Analysis of Radioactive Iodine Trapping Mechanism by Zinc-Based Metal–Organic Frameworks with Various N-Containing Carboxylate Ligands

C@MOF composite material for rapid and efficient capture of gaseous iodine

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Iodine capture by ZSM-5 with different Si/Al ratios: An experimental and molecular simulation investigation

Cited by 7 publications

References 38 publications

Hollow Core–Shell Bismuth Based Al‐Doped Silica Materials for Powerful Co‐Sequestration of Radioactive I2 and CH3I

Hollow Core–Shell Bismuth Based Al‐Doped Silica Materials for Powerful Co‐Sequestration of Radioactive I2 and CH3I

Analysis of Radioactive Iodine Trapping Mechanism by Zinc-Based Metal–Organic Frameworks with Various N-Containing Carboxylate Ligands

C@MOF composite material for rapid and efficient capture of gaseous iodine

Contact Info

Product

Resources

About

Hollow Core–Shell Bismuth Based Al‐Doped Silica Materials for Powerful Co‐Sequestration of Radioactive I₂ and CH₃I

Hollow Core–Shell Bismuth Based Al‐Doped Silica Materials for Powerful Co‐Sequestration of Radioactive I₂ and CH₃I