ZIF-67基纳米多孔衍生碳的制备及其电容去离子性能研究
Nanostructured porous carbons derived from ZIF-67 frameworks for capacitive deionization
张龙玉 1王锐 1柴文翠 2马梦瑶 3李林科1
作者信息
- 1. College of Chemistry,Zhengzhou University,Zhengzhou 450001,China
- 2. College of Chemistry,Zhengzhou University,Zhengzhou 450001,China;Henan Laboratory of Critical Metals,Zhengzhou University,Zhengzhou 450001,China
- 3. School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China
- 折叠
摘要
电容去离子(CDI)是一种具有良好发展前景的脱盐技术,CDI脱盐性能很大程度上取决于电极材料的结构和性质.本文以金属有机框架材料ZIF-67作为前驱体,制备了三种不同形态结构的ZIF-67基纳米多孔衍生碳材料,包括碳纳米盒(ZCNB)、碳纳米管(ZCNT)以及碳纳米盒和碳纳米管混合物(ZCNH),并研究了三种衍生碳材料的孔隙结构、表面性质、电化学性质与CDI性能构效关系.结果表明,三种ZIF-67基纳米多孔衍生碳材料中,由于ZCNB具有高比表面积、良好的润湿性、高表面电荷和合适的孔径,因此ZCNB具有最高的CDI除盐能力.尽管ZCNH和ZCNT中的碳纳米管可以提高碳材料的导电性,但同时降低了碳材料的比表面积和表面润湿性,从而降低了CDI除盐性能.本文将为MOFs基衍生碳电极材料的设计提供理论和实验指导.
Abstract
Capacitive deionization(CDI)is a promising technology for removing salt from brackish water,and the desalination performance greatly depends on the structures and properties of electrode materials.In this work,the ZIF-67 was used as a precursor to obtain three ZIF-67-derived porous carbon nanomaterials including carbon nano-box(ZCNB),carbon nanotubes(ZCNT),and carbon nano-box and carbon nanotube hybrids(ZCNH).The pore structures,surface properties,electrochemical properties,CDI performances of three porous carbon nanomaterials and constitutive relationships were investigated.The results show that among three ZIF-67-derived nanostructured carbon materials,ZCNB has the highest adsorption capacity because of its high specific surface area,good wettability,high surface charge,and suitable pore sizes.Though the carbon nanotubes in the ZCNH and ZCNT could improve the electrical conductivity of the material,it leads to a decrease in the specific surface area and wettability,thereby reducing the adsorption capacity.This work would provide a reference for the design of MOFs-derived CDI electrode materials.
关键词
多孔碳/金属有机框架材料/ZIF-67/电容去离子Key words
porous carbon/metal-organic frameworks/ZIF-67/capacitive deionization引用本文复制引用
基金项目
Highlevel Talent Introduction and Training Project of Zhengzhou University,China(22180012)
Key Scientific Research Projects of Colleges and Universities in Henan Province,China(21A610011)
National Natural Science Foundation of China(92061201)
National Natural Science Foundation of China(21825106)
National Natural Science Foundation of China(22001236)
Program for Innovative Research Team(in Science and Technology)in Universities of Henan Province and Zhengzhou University,Ch(9IRTSTHN022)
出版年
2023
NETL
NSTL
维普
万方数据