Work

Self‐Assembled Pd(II) Nano‐Adsorbents for Iodine and Methyl Iodide Capture in Vapor and Aqueous Phases

Year: 2025

Type: article

Abstract: The excessive release of iodine from industrial and medical activities has led to severe contamination of air and water, causing major concern to public health. Effective capture and secure storage of radioactive iodine in both vapor and aqueous phases are crucial for nuclear safety and ecological protection. In this study, it is explore four non-porous metal-organic coordination cages (MC1-MC4) comprising of Pd-acceptors and diverse aromatic ligands for iodine adsorption across different media. These cages exhibit remarkable iodine uptake, reaching 3.38 g g⁻¹ in the vapor phase at 75 °C and ≈2.73 g g⁻¹ in aqueous solution, with significantly faster adsorption kinetics than covalent organic framework (COF)- and metal-organic framework (MOF)-based materials. Moreover, high adsorption capacities are observed in dynamic flow-through experiments, with MC2 achieving an elution volume of up to 7.8 L g⁻¹ in a 0.5 mM I₃⁻ solution. Practical tests confirm their efficiency in removing iodine from seawater and drinking water, reducing 5 ppm concentrations to ppb levels. Additionally, the cages exhibit outstanding adsorption of methyl iodide vapor, achieving uptake capacities as high as 0.94 g g⁻¹ under ambient conditions. With high stability, recyclability, and scalable synthesis, these metal-organic cages emerge as promising nano-adsorbents for iodine and methyl iodide removal from various environmental matrices.

Source: Small

DOI: 10.1002/smll.202504242

Authors: Monotosh Dalapati, Raghunath Singha, Pankaj Maity, Debashree Manna, Dipak Samanta

Institutions: National Institute of Science Education and Research, Homi Bhabha National Institute, Czech Academy of Sciences, Czech Academy of Sciences, Institute of Organic Chemistry and Biochemistry

Language: English

Topic: Metal-Organic Frameworks: Synthesis and Applications

Subfield: Inorganic Chemistry

Field: Chemistry

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: hybrid

Estimated APC paid: $5,790