Nanohybrid of Silver‐MXene: A Promising Sorbent for Iodine Gas Capture from Nuclear Waste

Abstract The increasing reliance on nuclear energy as a significant low‐carbon power source necessitates effective solutions for managing radioactive emissions. This study introduces a novel application of MXene nanohybrids, specifically silver‐MXene (Ag‐Ti 3 C 2 T x ), as an effective sorbent for radioiodine off‐gas capture at an operating temperature of 150 °C. Through comprehensive material characterization, including X‐ray diffraction, scanning and transmission electron microscopies, energy‐dispersive X‐ray spectroscopy, Raman spectroscopy, thermogravimetric analysis, inductively coupled plasma optical emission spectroscopy, and gas sorption analyses, the successful loading of Ag nanoparticles onto Ti 3 C 2 T x is confirmed and the subsequent formation of AgI upon iodine capture. The results demonstrate that Ag‐Ti 3 C 2 T x exhibits superior iodine uptake compared to traditional silver‐based sorbents such as silver mordenite zeolite (AgZ) and silver‐functionalized silica aerogel (AgAero). The Ag‐Ti 3 C 2 T x achieves an iodine loading of 946 mg g −1 , significantly outperforming AgZ (131 mg g −1 ). These findings highlight the potential of Ag‐Ti 3 C 2 T x as a highly efficient, thermally stable sorbent for radioiodine capture, and potentially addressing key limitations of existing materials.