MOF-on-MOF nanoarchitectures for selectively functionalized nitrogen-doped carbon-graphitic carbon/carbon nanotubes heterostructure with high capacitive deionization performance
MOF-on-MOF nanoarchitectures for selectively functionalized nitrogen-doped carbon-graphitic carbon/carbon nanotubes heterostructure with high capacitive deionization performance
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MOF-on-MOF纳米结构用于选择性功能化氮掺杂碳-石墨碳/碳纳米管异质结构，具有高电容去离子性能
DOI：
10.1016/j.nanoen.2022.107146
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发表时间：
2022
期刊：
影响因子：
17.6
通讯作者：
o
中科院分区：
文献类型：
--
作者：
Ying Zhang;Jingyu Wu;Shuaihua Zhang;Ningzhao Shang;Xiaoxian Zhao;Saad M. Alshehri;Tanir Ahamad;Yusuke Yamauchi;Xingtao Xu;Yoshio B;o
Carbon-carbon heterostructures are an emerging material paradigm to promote the development of capacitive deionization (CDI). The synthesis of this heterostructure with designed functionalities derived from metal-organic frameworks (MOFs) is interesting, but it has always been challenging. We develop MOF-on-MOF nanoarchitectures to obtain a selectively functionalized nitrogen-doped carbon@graphitic carbon/carbon nanotubes heterostructure (NC@GC/CNTs)viathe direct pyrolysis of elaborately designed ZIF-L@ZIF-67 core-shell precursors. In this core-shell nanoarchitecture, the inner Zn-based ZIF-L provides a well-defined 2D interface for the oriented growth of the Co-based ZIF-67 outer layer, which will then convert to NC nanosheets with a high nitrogen doping content and large specific surface area for the accommodation of more ions. Meanwhile, the outer ZIF-67 layer creates highly graphitized GC/CNTs architecture offering fast electron transfer and good chemical stability, and it addresses the possible aggregation or collapse of the inner ZIF-L precursors during pyrolysis. As expected, the newly developed NC@GC/CNTs material with well-designed functionalities exhibits high salt adsorption capacity, rapid salt adsorption rate, and excellent CDI cycling stability, which highlight the significance of the carbon–carbon heterostructure to potential CDI applications and the importance of MOF-on-MOF nanoarchitectures on nanomaterials synthetic chemistry.
