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Issue 30, 2018
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BCN nanosheets templated by g-C3N4 for high performance capacitive deionization

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Abstract

Capacitive deionization (CDI) is an emerging technology for removing charged ions from saline water and has attracted much attention in recent years. Developing a new electrode material with a reasonable structure is of great significance for obtaining high CDI performance. Herein, two-dimensional (2D) boron carbon nitride (BCN) nanosheets were fabricated using a new approach, which uses g-C3N4 as both the template and the nitrogen source, boric acid as the boron source and a subsequent pyrolysis process. The as-prepared BCN nanosheets show a pore structure with a high specific surface area and were investigated as CDI electrode materials for the first time. Moreover, the high heteroatom content, with a potential synergistic effect of N and B atoms, results in fast ion diffusion and good charge transfer ability. The BCN nanosheets demonstrate a high salt adsorption capacity of 13.6 mg g−1 at 1.4 V applied voltage when the initial NaCl concentration is 500 mg L−1. The BCN electrodes also exhibited better cyclic stability over 15 adsorption–desorption cycles. These results indicate that BCN nanosheets should be practicable candidates for high performance CDI electrode materials.

Graphical abstract: BCN nanosheets templated by g-C3N4 for high performance capacitive deionization

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Publication details

The article was received on 02 May 2018, accepted on 26 Jun 2018 and first published on 03 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA04058C
Citation: J. Mater. Chem. A, 2018,6, 14644-14650
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    BCN nanosheets templated by g-C3N4 for high performance capacitive deionization

    S. Wang, G. Wang, T. Wu, Y. Zhang, F. Zhan, Y. Wang, J. Wang, Y. Fu and J. Qiu, J. Mater. Chem. A, 2018, 6, 14644
    DOI: 10.1039/C8TA04058C

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