BCN nanosheets templated by g-C3N4 for high performance capacitive deionization. Issue 30 (12th July 2018)

• Record Type: Journal Article
• Authors: Wang, Shiyong; Wang, Gang; Wu, Tingting; Zhang, Yunqi; Zhan, Fei; Wang, Yuwei; Wang, Jigang; Fu, Yu; Qiu, Jieshan
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 30(2018)
• Page Start: 14644
• Page End: 14650
• Publication Date: 2018-07-12
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8ta04058c
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : BCN nanosheets show a pore structure with a high specific surface area and are investigated as CDI electrode materials for the first time. 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-C3 N4 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.