Zero-valent silver nanoparticles functionalized populus tomentosa fiber for efficient capture and immobilization of iodine vapor
摘要
With the rapid development of nuclear energy, the removal of radioactive iodine generated during spent fuel reprocessing has become increasingly important. Based on the unique straw-like structure of populus tomentosa fiber (PTF) and the highly active iodine vapor capture ability of zero-valent silver nanoparticles (PTF@Ag0NP), an Ag0NP composite functional material with highly efficient iodine vapor capture capability was synthesized from biowaste PTF through ultrasonic and high-temperature hydrothermal methods in this study. The iodine capture experiment demonstrated that PTF@Ag0NP exhibits rapid iodine capture efficiency, reaching dynamic equilibrium within 4 h and a maximum capture capacity of 1008.1 mg/g. Density functional theory calculations show that PTF@Ag0NP exhibits extremely high chemical reactivity toward iodine, with a reaction binding energy of