基于功能化沸石咪唑盐骨架的电容去离子电极材料研究进展

Research progress on capacitive deionization electrode material based on functionalized zeoliticimidazolate frameworks

电容去离子技术(CDI)是一种利用两电极之间的电压进行海水淡化的新技术。沸石咪唑盐骨架(ZIFs)作为一种含氮金属有机框架,其衍生的碳材料是一种新型CDI电极材料,但存在单孔结构、孔利用率低和电导率低的缺点,因此如何扩展孔结构、提高电导率成为了研究热点。针对提高ZIFs衍生碳材料电容去离子性能的方法进行了综述,重点介绍了孔结构调控、杂原子掺杂、纳米化复合和双金属/双配体构筑,并对ZIFs衍生碳作为CDI电极材料存在的不足及未来研究方向进行了总结。

Capacitive deionization(CDI)is a promising new technology for water desalination making use of an electrical voltage applied between two electrodes.Zeoliticimidazolate frameworks(ZIFs)are a kind of N-containing metal organic frameworks.Their derived carbons are novel CDI electrode materials.However,the shortcomings of single-pore structure,low pore utilization and low conductivity are not conducive to its adsorption performance.How to expand the pore structure and improve conductivity has become a research hotspot.The methods of improving the capacitive deionization performance of ZIFs derived carbon materials were analyzed and summarized,including pore structure design,heteroatom doping,nano composition and bimetal or dual ligand construction.The main problems and future development of ZIFs derived carbons as CDI electrode materials were summarized.