二维材料复合质子膜的制备及其氕氚分离性能研究
Preparation of two-dimensional material composite proton exchange membrane and its performance in protium-tritium separation
周勋 1柳伟平 2丁文艺 2李桃生2
作者信息
- 1. 中国科学院合肥物质科学研究院核能安全技术研究所,安徽 合肥 230031;中国科学技术大学,安徽 合肥 230026
- 2. 中国科学院合肥物质科学研究院核能安全技术研究所,安徽 合肥 230031
- 折叠
摘要
采用溶液浇铸法分别制备了Graphene-Nafion和hBN-Nafion 2 种二维纳米复合质子交换膜,利用XRD、ATR-FT-IR和SEM对复合膜的结构及微观形貌进行表征,并对复合膜的离子交换容量、质子电导率、机械性能和热稳定性进行测试,结果表明,Graphene和hBN纳米片均匀地分散于Nafion基体内部.相较于重铸Nafion膜(空白对照样品),复合膜的离子交换容量、质子电导率以及机械性能均有不同程度的提升,特别是在掺入质量分数为 0.50%时,Graphene-Nafion和hBN-Nafion复合膜的质子传导性能约为重铸Nafion膜的 1.25 倍和 1.14 倍.通过对比Graphene-Nafion和hBN-Nafion 2 种复合膜的氕氚分离性能发现,在初始氚水比活度为3.51×107 Bq/L时,持续电解超过60 h,2 种复合膜的氕氚分离系数分别为5.73 和8.46,氚回收率分别为 78.53%和 85.35%,表明hBN-Nafion复合膜具有更好的氕氚分离性能.
Abstract
Graphene-Nafion and hBN-Nafion,two kinds of two-dimensional nanomaterial composite proton exchange membranes,are prepared via the solution casting method,and characterized by means of XRD,ATR-FTIR and SEM.The ion exchange capacity,proton conductivity,mechanical properties,and thermal stability of the composite membranes are tested.It is indicated by the results that graphene and hBN nanosheets uniformly disperse inside Nafion matrix.The ion exchange capacity,plasmonic conductivity,mechanical properties and thermal stability of the composite membranes are better than the recast Nafion membrane.In particular,the proton conduction properties of Graphene-Nafion and hBN-Nafion composite membranes both at a doping amount of 0.50 wt%are about 1.25 and 1.14 times those of recast Nafion membranes.Through comparing the protium-tritium separation performance of Graphene-Nafion and hBN-Nafion composite membranes,it is found that the protium-tritium separation coefficients of the two composite membranes are 5.73 and 8.46,respectively,and the tritium recoveries are 78.53%and 85.35%,respectively when the continuous electrolysis has been performed for over 60 h at an initial tritium water specific activity of 3.51×107 Bq·L-1,indicating that hBN-Nafion composite membrane has better protium-tritium separation performance.
关键词
二维材料/复合质子交换膜/氕氚分离系数Key words
two-dimensional material/composite proton exchange membrane/protium-tritium separation coefficient引用本文复制引用
基金项目
合肥市自然科学基金项目(2022030)
中科院合肥物质科学研究院院长基金项目(YZJJ202202-TS)
出版年
2024
NETL
NSTL
万方数据