Core-shell hybrid zeolitic imidazolate framework-derived hierarchical carbon for capacitive deionization
We introduce a viable strategy for the fabrication of core-shell ZIF-8@PVP-PDA/Zn by in situ 2-methylimidazole-assisted dopamine self-polymerization. The role of polyvinyl pyrrolidone (PVP) and 2-methylimidazole (2-MI) towards ZIF-8@PVP-PDA/Zn formation is systematically demonstrated. In particular,...
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Published in | Journal of materials chemistry. A, Materials for energy and sustainability Vol. 8; no. 29; pp. 14653 - 1466 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Cambridge
Royal Society of Chemistry
01.01.2020
|
Subjects | |
Online Access | Get full text |
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Summary: | We introduce a viable strategy for the fabrication of core-shell ZIF-8@PVP-PDA/Zn by
in situ
2-methylimidazole-assisted dopamine self-polymerization. The role of polyvinyl pyrrolidone (PVP) and 2-methylimidazole (2-MI) towards ZIF-8@PVP-PDA/Zn formation is systematically demonstrated. In particular, 2-MI not only is employed as the organic ligand for ZIF-8 but also provides an alkaline environment for the polymerization of dopamine. Moreover, it also protects the ZIF-8 structure from etching. After pyrolysis, the ZIF-8@PVP-PDA/Zn is converted into ant-nest-like hierarchical carbon (ANHC), which has a wide pore distribution, high pore volume (2.35 cm
3
g
−1
) and high nitrogen (7.12%) content. Superior capacitive deionization (CDI) performance (25.4 mg g
−1
) and stable electrosorption cycles of ANHC are achieved, which demonstrates its potential for CDI applications.
We introduce a viable strategy for the fabrication of core-shell ZIF-8@PVP-PDA/Zn by
in situ
2-methylimidazole-assisted dopamine self-polymerization. |
---|---|
Bibliography: | Electronic supplementary information (ESI) available. See DOI 10.1039/d0ta05709f |
ISSN: | 2050-7488 2050-7496 |
DOI: | 10.1039/d0ta05709f |