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Stable mesoporous zirconium-porphyrin framework for high-capacity, selective iodine capture from gas and water.

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Title: Stable mesoporous zirconium-porphyrin framework for high-capacity, selective iodine capture from gas and water.
Authors: Ni, Siqi1,2 (AUTHOR), Shaban, Muhammad1,2 (AUTHOR), Ren, Xuemei1 (AUTHOR), Chen, Changlun1 (AUTHOR) clchen@ipp.ac.cn
Source: Separation & Purification Technology. Mar2026, Vol. 383, pN.PAG-N.PAG. 1p.
Subjects: Iodine, Adsorption capacity, Mesoporous materials, Radioactive waste disposal, Environmental security, Metal-organic frameworks, Physical & theoretical chemistry, Water vapor
Abstract: Radioactive iodine isotopes such as 129I /131I present significant environmental and health risks due to their volatility, bioaccumulation, and long half-lives. In this study, we developed a mesoporous zirconium–porphyrin framework (Zr–TAPP) through coordination-driven self-assembly of Zr4+ ions and tetra-aminophenyl porphyrin ligands. This material features a thermally stable two-dimensional layered structure, where π-conjugated porphyrin rings and Lewis-acidic Zr O clusters provide numerous adsorption sites. Zr–TAPP achieves high iodine vapor uptake of 1.78 g/g at 75 °C through chemisorption, reducing I₂ to I₃− and immobilizing it via Zr N coordination and π-complexation. In aqueous solutions, it reaches a maximum iodide adsorption capacity of 303.8 mg/g at pH 7.0, driven by electrostatic attraction to protonated amino groups and porphyrin-mediated charge transfer. The adsorbent maintains 85 % of its capacity after five reuse cycles and shows strong selectivity over competing anions in aqueous solutions. Mechanistic analyses (the X-ray diffractometer and Raman spectroscopy) confirm a synergistic mechanism involving electron transfer, I₃− formation, and hydrogen bonding at protonated nitrogen centers. This study presents a robust, efficient dual-phase iodine adsorbent that offers a promising solution for nuclear waste remediation. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Separation & Purification Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 190273934
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PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Stable mesoporous zirconium-porphyrin framework for high-capacity, selective iodine capture from gas and water.
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  Data: <searchLink fieldCode="AR" term="%22Ni%2C+Siqi%22">Ni, Siqi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shaban%2C+Muhammad%22">Shaban, Muhammad</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ren%2C+Xuemei%22">Ren, Xuemei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Changlun%22">Chen, Changlun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> clchen@ipp.ac.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Separation+%26+Purification+Technology%22">Separation & Purification Technology</searchLink>. Mar2026, Vol. 383, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Iodine%22">Iodine</searchLink><br /><searchLink fieldCode="DE" term="%22Adsorption+capacity%22">Adsorption capacity</searchLink><br /><searchLink fieldCode="DE" term="%22Mesoporous+materials%22">Mesoporous materials</searchLink><br /><searchLink fieldCode="DE" term="%22Radioactive+waste+disposal%22">Radioactive waste disposal</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+security%22">Environmental security</searchLink><br /><searchLink fieldCode="DE" term="%22Metal-organic+frameworks%22">Metal-organic frameworks</searchLink><br /><searchLink fieldCode="DE" term="%22Physical+%26+theoretical+chemistry%22">Physical & theoretical chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Water+vapor%22">Water vapor</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Radioactive iodine isotopes such as 129I /131I present significant environmental and health risks due to their volatility, bioaccumulation, and long half-lives. In this study, we developed a mesoporous zirconium–porphyrin framework (Zr–TAPP) through coordination-driven self-assembly of Zr4+ ions and tetra-aminophenyl porphyrin ligands. This material features a thermally stable two-dimensional layered structure, where π-conjugated porphyrin rings and Lewis-acidic Zr O clusters provide numerous adsorption sites. Zr–TAPP achieves high iodine vapor uptake of 1.78 g/g at 75 °C through chemisorption, reducing I₂ to I₃− and immobilizing it via Zr N coordination and π-complexation. In aqueous solutions, it reaches a maximum iodide adsorption capacity of 303.8 mg/g at pH 7.0, driven by electrostatic attraction to protonated amino groups and porphyrin-mediated charge transfer. The adsorbent maintains 85 % of its capacity after five reuse cycles and shows strong selectivity over competing anions in aqueous solutions. Mechanistic analyses (the X-ray diffractometer and Raman spectroscopy) confirm a synergistic mechanism involving electron transfer, I₃− formation, and hydrogen bonding at protonated nitrogen centers. This study presents a robust, efficient dual-phase iodine adsorbent that offers a promising solution for nuclear waste remediation. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Separation & Purification Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.seppur.2025.136173
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Iodine
        Type: general
      – SubjectFull: Adsorption capacity
        Type: general
      – SubjectFull: Mesoporous materials
        Type: general
      – SubjectFull: Radioactive waste disposal
        Type: general
      – SubjectFull: Environmental security
        Type: general
      – SubjectFull: Metal-organic frameworks
        Type: general
      – SubjectFull: Physical & theoretical chemistry
        Type: general
      – SubjectFull: Water vapor
        Type: general
    Titles:
      – TitleFull: Stable mesoporous zirconium-porphyrin framework for high-capacity, selective iodine capture from gas and water.
        Type: main
  BibRelationships:
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      – PersonEntity:
          Name:
            NameFull: Ni, Siqi
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            NameFull: Shaban, Muhammad
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          Name:
            NameFull: Ren, Xuemei
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            NameFull: Chen, Changlun
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          Dates:
            – D: 03
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
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            – Type: volume
              Value: 383
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            – TitleFull: Separation & Purification Technology
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