Enhanced iodine capture by incorporating anionic phosphate unit into porous networks

Ai, Chenxiang; Feng, Jiaxuan; Yang, Song; Xiong, Shanbai; Tang, Juntao; Yu, Guipeng; Pan, Chunyue

doi:10.1016/j.seppur.2021.119799

Cited by 15 publications

(11 citation statements)

References 40 publications

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“…Generally, organic solvents were used to desorb iodine from the iodine-loaded adsorbents. 8,24 In this study, ethanol and methanol were ineffective for iodine desorption from the iodine-loaded N-MOF-PAN fibers (Figure S16), further demonstrating the strong interactions between the iodine and the fibers. Thus, the N-MOF-PAN fibers could act as an effective iodine storage material.…”

Section: Preparation and Characterization Of Fibermentioning

confidence: 64%

“…Furthermore, adsorption/desorption experiments of the N-MOF-PAN fibers were conducted in the liquid phase to determine the reversible process of iodine uptake, which is related to the recovery and utilization of radioactive pollutants. Generally, organic solvents were used to desorb iodine from the iodine-loaded adsorbents. , In this study, ethanol and methanol were ineffective for iodine desorption from the iodine-loaded N-MOF-PAN fibers (Figure S16), further demonstrating the strong interactions between the iodine and the fibers. Thus, the N-MOF-PAN fibers could act as an effective iodine storage material.…”

Section: Resultsmentioning

confidence: 99%

“…Azambre’s group impregnated branched polyethyleneimine into nanosilica adsorbents, and the results demonstrated that the adsorption iodine capacities depend on the N content of the samples . Additionally, studies showed that cationic adsorption sites could also promote the iodine adsorption to capture the formed polyiodide anions by Coulomb interactions . Han’s group constructed ionic covalent organic frameworks, and Ghosh’s group prepared ionic porous organic polymers. , They both found that cationic binding sites are beneficial to iodine capture.…”

Section: Introductionmentioning

confidence: 99%

“…23 Additionally, studies showed that cationic adsorption sites could also promote the iodine adsorption to capture the formed polyiodide anions by Coulomb interactions. 24 Han's group constructed ionic covalent organic frameworks, and Ghosh's group prepared ionic porous organic polymers. 7,25 They both found that cationic binding sites are beneficial to iodine capture.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Multi-Functionalization Integration into the Electrospun Nanofibers Exhibiting Effective Iodine Capture from Water

Chen

Zhao

et al. 2022

ACS Appl. Mater. Interfaces

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Efficient capture of radioiodine from aqueous solutions is of importance for sustainable development of nuclear energy and protection of the environment. However, current adsorbents under exploration suffer from limited adsorption capacity and powder form that are unfavorable for practical applications. Herein, we applied a “multi-functionalization integration” idea to construct novel electrospun fiber adsorbents (N-MOF-PAN fibers) containing cationic quaternary ammonium groups, uncharged amine groups, and porous MOF material (UiO-66-NH2), which in synergy adsorb iodine effectively from both saturated I2 aqueous solution and I3 – aqueous solution. Iodine species (94.6%) could be removed from saturated I2 solution within 180 min, and 98.7% of iodine species were captured from I3 – solution within 240 min. Additionally, the N-MOF-PAN fibers exhibited high iodine uptake capacities of 3.56 g g–1 from a concentrated KI/I2 aqueous solution and 3.61 g g–1 from the Langmuir isotherm model, surpassing many reported iodine adsorbents in the aqueous medium. Characterization and mechanism analysis indicated that multiple active sites simultaneously attribute to the high binding affinity toward iodine species through physical adsorption and chemical adsorption. Furthermore, benefiting from their macroscopic architecture, N-MOF-PAN fibers were used as the adsorption column for dynamic iodine capture with a bed volume of 1490 mL, which is much higher than commercially activated carbons. Overall, this work provides guidance for the development of novel fiber adsorbents for related applications.

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Section: Preparation and Characterization Of Fibermentioning

confidence: 64%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multi-Functionalization Integration into the Electrospun Nanofibers Exhibiting Effective Iodine Capture from Water

Chen

Zhao

et al. 2022

ACS Appl. Mater. Interfaces

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show abstract

Section: Introductionmentioning

confidence: 99%

Enrichment and Separation of Radionuclides by Organic Polymer Materials: A Review

Zhang,

Yang,

Rong

et al. 2024

ACS EST Eng.

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Nuclear power provides a chance for the decarbonization of global energyrelated emissions. However, the spent fuel produced by nuclear reactors contains various radionuclides, which require further disposal and treatment. Therefore, the enrichment and separation of radionuclides are of great significance for the recycling and utilization of resources. Organic polymer materials have attracted great attention due to their excellent physicochemical properties of rapid kinetics, high adsorption capacity, high selectivity, and diverse functionalization. This review provides an overview of the use of pristine polymers, functionalized polymers, and polymer-based composites for the highly efficient enrichment and separation of different kinds of radionuclides (i.e., U, Tc, I). The synthesis strategy, radionuclides enrichment and separation ability, and related mechanism are comprehensively summarized. The structure−property relationships in polymer-based materials that underpin their outstanding environmental remediation performance are also illustrated. Finally, the challenges and perspectives of polymer-based materials for future radionuclide separation and legacy nuclear waste management are reasonably proposed, aiming to design functional polymers for task-specific applications.

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Enhancing the Iodine Adsorption Capacity of Pyrene‐Based Covalent Organic Frameworks by Regulating the Pore Environment

Gao

Guan

Zhang

et al. 2023

Macromol. Rapid Commun.

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Regulating of pore environment is an efficient way to improve the performance of covalent organic frameworks (COFs) for specific application requirements. Herein, the design and synthesis of two pyrene‐based 2D COFs with ‐H or ‐Me substituents, TFFPy‐PPD‐COF and TFFPy‐TMPD‐COF are reported. Both of them show long order structure and high porosity, in which TFFPy‐PPD‐COF displays a larger pore volume and bigger BET surface area (2587 m2 g−1, 1.17 cm3 g−1). Interestingly, TFPPy‐TMPD‐COF exhibits a much higher vapor iodine capacity (4.8 g g−1) than TFPPy‐PPD‐COF (2.9 g g−1), in contrast to their pore volume size. By using multiple techniques, the better performance of TFPPy‐TMPD‐COF in iodine capture is ascribed to the altered pore environment by introducing methyl groups, which contributes to the formation of polyiodide anions and enhances the interactions between the frameworks and iodine. These results will be helpful for understanding the effect of pore environment in COFs for iodine uptake and constructing novel structure with high iodine capture performance.

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Enhanced iodine capture by incorporating anionic phosphate unit into porous networks

Cited by 15 publications

References 40 publications

Multi-Functionalization Integration into the Electrospun Nanofibers Exhibiting Effective Iodine Capture from Water

Multi-Functionalization Integration into the Electrospun Nanofibers Exhibiting Effective Iodine Capture from Water

Enrichment and Separation of Radionuclides by Organic Polymer Materials: A Review

Enhancing the Iodine Adsorption Capacity of Pyrene‐Based Covalent Organic Frameworks by Regulating the Pore Environment

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