Zero-valent silver nanoparticles functionalized populus tomentosa fiber for efficient capture and immobilization of iodine vapor  

作　　者：Yu Fang Hui Zhu Pei Chen Fang Liu Yong Yi Jian Zhou Tao Duan Jie-Hong Lei 

机构地区：[1]Research Center for New Energy Materials,China West Normal University,Nanchong 637002,China [2]School of Physics and Astronomy,China West Normal University,Nanchong 637002,China [3]College of Materials and Chemistry&Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China [4]School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,China [5]State Key Laboratory of Environment-friendly Energy Materials,School of National Defense Science&Technology,Southwest University of Science and Technology,Mianyang 621010,China [6]Tianfu Institute of Research and Innovation,Southwest University of Science and Technology,Chengdu 610299,China

出　　处：《Nuclear Science and Techniques》2025年第5期43-56,共14页核技术(英文)

基　　金：supported by the Sichuan Outstanding Young Scientific and Technological Talents Project(No.2021JDJQ0016);Doctoral Initiation Project of China West Normal University(No.22k E043);and Science and Technology Project of Sichuan Province(No.2022NSFSC0388)。

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@Ag^(0)NP),an Ag^(0)NP composite functional material with highly efficient iodine vapor capture capability was synthesized from biowaste PTF through ultrasonic and hightemperature hydrothermal methods in this study.The iodine capture experiment demonstrated that PTF@Ag^(0)NP 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@Ag^(0)NP exhibits extremely high chemical reactivity toward iodine,with a reaction binding energy of-2.88 e V.Additionally,the molecular dynamics of PTF@Ag^(0)NP indicate that there is no atomic displacement at 77?C,indicating the excellent temperature stability of the material at the operating temperature.The capture mechanism suggests that iodine vapor primarily reacts with Ag^(0)NP to form Ag I,and that the hydroxyl groups in PTF can also effectively capture iodine vapor by adsorption induction.In conclusion,PTF@Ag^(0)NP is expected to be an effective candidate adsorbent material for removing radioactive iodine vapor from exhaust gases during spent fuel reprocessing.

关 键 词：Ag^(0)NP Populus tomentosa fiber Iodine vapor Capture and immobilization DFT calculations 

分 类 号：O647.3[理学—物理化学]