N-doped porous carbon-based capacitive deionization electrode materials loaded with activated carbon fiber for water desalination applications. Issue 3 (June 2022)

• Record Type: Journal Article
• Authors: Men, Lijuan; Chen, Chunyu; Liu, An; Yu, Siyang; Zhou, Jiankang; Xie, Yuxi; Ju, Dianchun
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 3(2022)
• Publication Date: 2022-06
• Subjects: N-doped porous carbon -- Activated carbon fiber -- Desalination -- Capacitive deionization; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2022.107943
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: Capacitive deionization (CDI) is a kind of emerging desalination technology. The development of electrode materials with a high desalination rate and long life, which can be used in seawater/brine water desalination and the reduction of salty wastewater, is a research hotspot in the aspect of global water treatment. In this study, N-doped porous carbon was combined with activated carbon fibers by a green coating method to successfully prepared CDI electrode (NPC@ACF). The microstructure and electrode performance of NPC@ACF were characterized by different techniques. The specific surface area of NPC@ACF tested by BET was 1098 m 2 g −1 . The electrochemical performance of this material was studied, showing that the NPC@ACF electrode possesses a high specific capacitance of 268.90 F g −1 . At the voltage of 1.2 V, the electrosorption capacity is 14.63 mg g −1, and the CDI desalination efficiency was increased by 39% and 63% compared with that of pure ACF or NPC, respectively. The NPC@ACF material has good recyclability showing a desalination efficiency retention rate of 27% after 50 cycles. With its recyclability, stability, and enhanced electrochemical characteristics, the NPC@ACF electrode has been proved to be an excellent electrode for CDI applications. Graphical Abstract: ga1 Highlights: A novel N-doped porous carbon and activated carbon fiber composites is designed. Higher desalination efficiency is achieved in novel composites (NPC@ACF). NPC@ACF has good electrochemical stability and recycling. NPC@ACF has excellent desalination performance compared with reported values.