1. Carbon nanofiber@ZIF-8 derived carbon nanosheet composites with a core–shell structure boosting capacitive deionization performance.
- Author
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Gong, Xinyi, Luo, Wanxia, Guo, Nannan, Zhang, Su, Wang, Luxiang, Jia, Dianzeng, Ai, Lili, and Feng, Shizhan
- Abstract
This work demonstrated the development of a hierarchical porous carbon–carbon composite used as an electrode material for capacitive deionization. The novel core–shell composite consisting of carbon nanofibers and N-rich porous carbon nanosheets (CNF
ZIF ) was obtained by in situ growth of zeolitic imidazolate framework-8 (ZIF-8) nanosheets on electrospun nanofibers. By tailoring the composition and porosity of CNFZIF , ion transport and adsorption in the composite were tuned to achieve a large desalination capacity and a high desalination rate. Thanks to the synergistic effect of its N-rich carbon surface, high hydrophilicity, large specific surface area and unique hierarchical porous structure, the engineered CNFZIF sample exhibited an excellent capacitive deionization performance with a maximum desalination capacity of up to 50.88 mg g−1 for NaCl solution and a high capacity retention rate of 97% after 30 cycles. Remarkably, CNFZIF also demonstrated high desalination capacities of 27.19 mg g−1 , 25.35 mg g−1 and 20.46 mg g−1 for CaCl2 , MgCl2 , and KCl solutions, respectively. This work provided a new route for the design of advanced electrode materials, and therefore represents a major step forward in the development of electrodes for capacitive deionization applications. [ABSTRACT FROM AUTHOR]- Published
- 2021
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