Highly efficient capture of iodine by Cu/MIL-101

AgNPs-Containing Metal–Organic Frameworks for the Effective Adsorption and Immobilization of Radioactive Iodine

“…Obviously, AgNPs@UiO-66 owns almost twice the adsorption capacity that of UiO-66, declaring that the AgNPs could effectively improve the adsorption ability of MOFs for I 2 . It is noteworthy that such a high capacity of AgNPs@UiO-66 outperforms most adsorbents (Table ), such as amino-functionalized MIL-101-NH 2 (311 mg/g), Cu-load Cu/MIL-101 (432 mg/g), porous carbon (AK-2, 336 mg/g), and other materials. − ,− Actually, the difference in I 2 adsorption capacity between UiO-66 and AgNPs@UiO-66 can be directly observed with the naked eye. As shown in Figure D, when UiO-66 and AgNPs@UiO-66 of the same mass were dispersed into I 2 solutions with the same concentration, AgNPs@UiO-66 absorbed most of the I 2 and changed the solution color from purple to colorless, while the I 2 solution containing UiO-66 remained purple after 12 h. This intuitive adsorption difference between UiO-66 and AgNPs@UiO-66 further confirms that AgNPs play a key role in the I 2 adsorption process.…”

“…As a new kind of solid adsorbent, porous MOFs, composed of organic ligands and metal ions or clusters, have been widely applied for the removal of harmful substances and environmental remediation, thanks to their adjustable pore size, tailorable structure, as well as designable adsorption sites. − Recently, MOFs have also been successfully utilized to remove radioactive I 2 . Unfortunately, the adsorption capacities in the reported MOFs are relatively low due to the weak interaction between the original frameworks and I 2 . − Therefore, it is desirable to design and develop MOF materials with high I 2 adsorption capacity.…”

The Impact of Structural Defects on Iodine Adsorption in UiO-66

“…Functionalisation of the MOF structure is a common route to increasing I 2 adsorption and relies on the introduction of electron donating [18,19] or reactive groups [20] onto the ligands. Doping MOFs with Ag [21] and Cu [22] ions can also improve the I 2 uptake of the host MOF. Detailed studies into the adsorption mechanism of I 2 have also been carried out and highlight the importance of the structure of the MOF [23,24] and of metal cluster nodes for the efficient capture of I 2 [25].…”

Porous ZIF-8@polyacrylonitrile composite beads for iodine capture

“…3 Among the iodine capture methods in waste gas, solid adsorption method has the advantages of simple, reliable, non-corrosive, simple design, low maintenance and operation cost; wet cleaning requires the use of corrosive acids or bases, so the solid adsorption method has advantages over wet cleaning. 3,13 Nowadays, many materials for capturing iodine have been developed, such as silver-based zeolite, [14][15][16] mordenite, [17][18][19][20] activated carbon (AC), [21][22][23] porous organic polymer (POPs), [24][25][26] metal-organic framework (MOFs), [27][28][29][30][31][32][33][34] etc. Currently, among these methods of capturing iodine, the mainstream method is to use silver-based zeolite to capture iodine.…”