HAN Zhen, CHEN Yuantao, ZHANG Wei, LIU Rong, XU Cheng, HU Guangzhuang, QIN Jianxian

(Department of Chemistry, Qinghai Normal University, Xining 810008, China)

Abstract:In order to eliminate the serious harm to the environment and human body caused by iodine vapor from nuclear waste, a nano-metal oxide composite containing carbon, silver and copper (denoted as Ag-Cu-MOC) was prepared by high temperature hydrothermal synthesis method.The influence of the doping amount of silver and copper on the adsorption amount of iodine vapor was analyzed, and the ratio of the amount of silver and copper with the optimal adsorption amount was determined. The prepared materials were tested and characterized by SEM, EDS, XRD, XPS, TG-DSC, FTIR and BET.The adsorption properties and adsorption mechanism of Ag-Cu-MOC were studied. The post-treatment of Ag-Cu-MOC after adsorption of iodine vapor was studied by adsorption-desorption regeneration experiment and sintering experiment. The results show that the adsorption capacity of Ag-Cu-MOC on iodine vapor is the largest when n(Cu) is 1∶6, reaching 1 735.3 mg/g. Ag-Cu-MOC is a mesoporous materialand good structural dispersion is conducive to the adsorption of iodine vapor. There are both physical and chemical adsorption in the adsorption process. The mass fraction of Ag-Cu-MOC decreases with the increase of temperature. The adsorption material can be recycled by anhydrous ethanol.After the adsorption of Ag-Cu-MOC, iron powder and boron oxide are added for sintering, and iodine is sealed in black glass to prevent leakage, which can minimize pollution to the environment.

Keywords: iodide; high temperature hydrothermal synthesis method; nano-metal oxide composite; adsorption property

中图分类号：X131.2                              文献标志码：A

文章编号：1008-5548(2020)04-0065-09

DOI:10.13732/j.issn.1008-5548.2020.04.011

收稿日期： 2019-12-10，修回日期：2020-03-24，在线出版时间：2020-04-28 15:55。

基金项目：国家自然科学基金项目，编号：21667024；青海省自然科学基金项目，编号：2016-2J-912。

第一作者简介：韩臻(1991—)，男，硕士研究生，研究方向为盐湖资源开发与利用。E-mail：hanzhen510@qq.com。

通信作者简介：陈元涛(1973—)，男，博士，教授，硕士生导师，研究方向为盐湖资源开发与利用。E-mail：chyt907@qhnu.edu.cn。